10-Q

UNITED STATES SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

FORM 10-Q

(Mark One)

ý QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934

 For the quarterly period ended September 30, 2014

or

o TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934

 For the transition period from __________ to  __________

Commission file number 001-34018

GRAN TIERRA ENERGY INC.

(Exact name of registrant as specified in its charter)

Nevada	98-0479924
(State or other jurisdiction of incorporation or organization)	(I.R.S. Employer Identification No.)
300, 625 11 Avenue S.W. Calgary, Alberta, Canada T2R 0E1
(Address of principal executive offices, including zip code)

(403) 265-3221

(Registrant’s telephone number, including area code)

Indicate by check mark whether the registrant (1) has filed all reports required to be filed by Section 13 or 15(d) of the Securities Exchange Act of 1934 during the preceding 12 months (or for such shorter period that the registrant was required to file such reports), and (2) has been subject to such filing requirements for the past 90 days.          Yes ý  No o

Indicate by check mark whether the registrant submitted electronically and posted on its corporate website, if any, every Interactive Data File required to be submitted and posted pursuant to Rule 405 of Regulation S-T (§ 232.405 of this chapter) during the preceding 12 months (or for such shorter period that the registrant was required to submit and post such files).   

Yes   ý  No o

Indicate by check mark whether the registrant is a large accelerated filer, an accelerated filer, a non-accelerated filer, or a smaller reporting company. See the definitions of “large accelerated filer,” “accelerated filer” and “smaller reporting company” in Rule 12b-2 of the Exchange Act.

Large accelerated filer x	Accelerated filer o
Non-accelerated filer o (Do not check if a smaller reporting company)	Smaller reporting company o

Indicate by check mark whether the registrant is a shell company (as defined in Rule 12b-2 of the Act).      Yes o No ý

On October 31, 2014, the following number of shares of the registrant’s capital stock were outstanding: 276,059,008 shares of the registrant’s Common Stock, $0.001 par value; one share of Special A Voting Stock, $0.001 par value, representing 4,534,127 shares of Gran Tierra Goldstrike Inc., which are exchangeable on a 1-for-1 basis into the registrant’s Common Stock; and one share of Special B Voting Stock, $0.001 par value, representing 5,646,968 shares of Gran Tierra Exchangeco Inc., which are exchangeable on a 1-for-1 basis into the registrant’s Common Stock.

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Gran Tierra Energy Inc.

Quarterly Report on Form 10-Q

Nine Months EndedSeptember 30, 2014

Table of contents

		Page
PART I	Financial Information
Item 1.	Financial Statements	8
Item 2.	Management's Discussion and Analysis of Financial Condition and Results of Operations	25
Item 3.	Quantitative and Qualitative Disclosures About Market Risk	46
Item 4.	Controls and Procedures	47
PART II	Other Information
Item 1.	Legal Proceedings	47
Item 1A.	Risk Factors	48
Item 6.	Exhibits	62
SIGNATURES		62
EXHIBIT INDEX		63

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 CAUTIONARY LANGUAGE REGARDING FORWARD-LOOKING STATEMENTS

This Quarterly Report on Form 10-Q, particularly in Item 2. “Management’s Discussion and Analysis of Financial Condition and Results of Operations,” includes forward-looking statements within the meaning of Section 27A of the Securities Act of 1933, as amended (the "Securities Act") and Section 21E of the Securities Exchange Act of 1934 (the "Exchange Act"). All statements other than statements of historical facts included in this Quarterly Report on Form 10-Q, including without limitation statements in the Management’s Discussion and Analysis of Financial Condition and Results of Operations, regarding our financial position, estimated quantities and net present values of reserves, business strategy, plans and objectives of our management for future operations, covenant compliance, capital spending plans and those statements preceded by, followed by or that otherwise include the words “believe”, “expect”, “anticipate”, “intend”, “estimate”, “project”, “target”, “goal”, “plan”, “objective”, “should”, or similar expressions or variations on these expressions are forward-looking statements. We can give no assurances that the assumptions upon which the forward-looking statements are based will prove to be correct or that, even if correct, intervening circumstances will not occur to cause actual results to be different than expected. Because forward-looking statements are subject to risks and uncertainties, actual results may differ materially from those expressed or implied by the forward-looking statements. There are a number of risks, uncertainties and other important factors that could cause our actual results to differ materially from the forward-looking statements, including, but not limited to, those set out in Part II, Item 1A “Risk Factors” in this Quarterly Report on Form 10-Q. The information included herein is given as of the filing date of this Form 10-Q with the Securities and Exchange Commission (“SEC”) and, except as otherwise required by the federal securities laws, we disclaim any obligations or undertaking to publicly release any updates or revisions to any forward-looking statement contained in this Quarterly Report on Form 10-Q to reflect any change in our expectations with regard thereto or any change in events, conditions or circumstances on which any forward-looking statement is based.

GLOSSARY OF OIL AND GAS TERMS

In this document, the abbreviations set forth below have the following meanings:

bbl	barrel	Mcf	thousand cubic feet
Mbbl	thousand barrels	MMcf	million cubic feet
MMbbl	million barrels	Bcf	billion cubic feet
bopd	barrels of oil per day	MMBtu	million British thermal units
BOE	barrels of oil equivalent	NGL	natural gas liquids
MMBOE	million barrels of oil equivalent	NAR	net after royalty
BOEPD	barrels of oil equivalent per day

Production represents production volumes NAR adjusted for inventory changes and losses. Our oil and gas reserves and sales are also reported NAR.

NGL volumes are converted to BOE on a one-to-one basis with oil. Gas volumes are converted to BOE at the rate of 6 Mcf of gas per bbl of oil, based upon the approximate relative energy content of gas and oil. The rate is not necessarily indicative of the relationship between oil and gas prices. BOEs may be misleading, particularly if used in isolation. A BOE conversion ratio of 6 Mcf: 1 bbl is based on an energy equivalency conversion method primarily applicable at the burner tip and does not represent a value equivalency at the wellhead.

In the discussion that follows we discuss our interests in wells and/or acres in gross and net terms. Gross oil and natural gas wells or acres refer to the total number of wells or acres in which we own a working interest. Net oil and natural gas wells or acres are determined by multiplying gross wells or acres by the working interest that we own in such wells or acres. Working interest refers to the interest we own in a property, which entitles us to receive a specified percentage of the proceeds of the sale of oil and natural gas, and also requires us to bear a specified percentage of the cost to explore for, develop and produce that oil and natural gas. A working interest owner that owns a portion of the working interest may participate either as operator, or by voting its percentage interest to approve or disapprove the appointment of an operator, in drilling and other major activities in connection with the development of a property.

We also refer to royalties and farm-in or farm-out transactions. Royalties include payments to governments on the production of oil and gas, either in kind or in cash. Royalties also include overriding royalties paid to third parties. Our reserves, production volumes and sales are reported net after deduction of royalties. As noted above, production volumes are also reported net of inventory adjustments and losses. Farm-in or farm-out transactions refer to transactions in which a portion of a working interest is sold by an owner of an oil and gas property. The transaction is labeled a farm-in by the purchaser of the

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working interest and a farm-out by the seller of the working interest. Payment in a farm-in or farm-out transaction can be in cash or in kind by committing to perform and/or pay for certain work obligations.

In the petroleum industry, geologic settings with proven petroleum source rocks, migration pathways, reservoir rocks and traps are referred to as petroleum systems.

Several items that relate to oil and gas operations, including aeromagnetic and aerogravity surveys, seismic operations and several kinds of drilling and other well operations, are also discussed in this document.

Aeromagnetic and aerogravity surveys are a remote sensing process by which data is gathered about the subsurface of the earth. An airplane is equipped with extremely sensitive instruments that measure changes in the earth's gravitational and magnetic field. Variations as small as 1/1,000th in the gravitational and magnetic field strength and direction can indicate structural changes below the ground surface. These structural changes may influence the trapping of hydrocarbons. These surveys are an efficient way of gathering data over large regions.

Seismic data is used by oil and natural gas companies as the principal source of information to locate oil and natural gas deposits, both for exploration for new deposits and to manage or enhance production from known reservoirs. To gather seismic data, an energy source is used to send sound waves into the subsurface strata. These waves are reflected back to the surface by underground formations, where they are detected by geophones which digitize and record the reflected waves. Computer software applications are then used to process the raw data to develop an image of underground formations. 2-D seismic is the standard acquisition technique used to image geologic formations over a broad area. 2-D seismic data is collected by a single line of energy sources which reflect seismic waves to a single line of geophones. When processed, 2-D seismic data produces an image of a single vertical plane of sub-surface data. 3-D seismic data is collected using a grid of energy sources, which are generally spread over several square miles. A 3-D seismic survey produces a three dimensional image of the subsurface geology by collecting seismic data along parallel lines and creating a cube of information that can be divided into various planes, thus improving visualization. Consequently, 3-D seismic data is generally considered a more reliable indicator of potential oil and natural gas reservoirs in the area evaluated.

Wells drilled are classified as exploration, development, injector or stratigraphic. An exploration well is a well drilled in search of a previously undiscovered hydrocarbon-bearing reservoir. A development well is a well drilled to develop a hydrocarbon-bearing reservoir that is already discovered. Exploration and development wells are tested during and after the drilling process to determine if they have oil or natural gas that can be produced economically in commercial quantities. If they do, the well will be completed for production, which could involve a variety of equipment, the specifics of which depend on a number of technical geological and engineering considerations. If there is no oil or natural gas (a “dry” well), or there is oil and natural gas but the quantities are too small and/or too difficult to produce, the well will be abandoned. Abandonment is a completion operation that involves closing or “plugging” the well and remediating the drilling site. An injector well is a development well that will be used to inject fluid into a reservoir to increase production from other wells. A stratigraphic well is a drilling effort, geologically directed, to obtain information pertaining to a specific geologic condition. These wells customarily are drilled without the intent of being completed for hydrocarbon production. The classification also includes tests identified as core tests and all types of expendable holes related to hydrocarbon exploration. Stratigraphic tests are classified as “exploratory type” if drilled in an unknown area or “development type” if drilled in a known area.

Workover is a term used to describe remedial operations on a previously completed well to clean, repair and/or maintain the well for the purpose of increasing or restoring production. It could include well deepening, plugging portions of the well, working with cementing, scale removal, acidizing, fracture stimulation, changing tubulars or installing/changing equipment to provide artificial lift.

The SEC definitions related to oil and natural gas reserves, per Regulation S-X, reflecting our use of deterministic reserve estimation methods, are as follows:

• Reserves. Reserves are estimated remaining quantities of oil and gas and related substances anticipated to be economically producible, as of a given date, by application of development projects to known accumulations. In addition, there must exist, or there must be a reasonable expectation that there will exist, the legal right to produce or a revenue interest in the production, installed means of delivering oil and gas or related substances to market, and all permits and financing required to implement the project.

• Proved oil and gas reserves. Proved oil and gas reserves are those quantities of oil and gas, which, by analysis of geoscience and engineering data, can be estimated with reasonable certainty to be economically producible from a given date forward, from known reservoirs, and under existing economic conditions, operating methods, and

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government regulations prior to the time at which contracts providing the right to operate expire, unless evidence indicates that renewal is reasonably certain, regardless of whether deterministic or probabilistic methods are used for the estimation. The project to extract the hydrocarbons must have commenced or the operator must be reasonably certain that it will commence the project within a reasonable time.

i. The area of the reservoir considered as proved includes:

A. The area identified by drilling and limited by fluid contacts, if any; and

B. Adjacent undrilled portions of the reservoir that can, with reasonable certainty, be judged to be continuous with it and to contain economically producible oil or gas on the basis of available geoscience and engineering data.

ii. In the absence of data on fluid contacts, proved quantities in a reservoir are limited by the lowest known hydrocarbons as seen in a well penetration unless geoscience, engineering, or performance data and reliable technology establishes a lower contact with reasonable certainty.

iii. Where direct observation from well penetrations has defined a highest known oil ("HKO") elevation and the potential exists for an associated gas cap, proved oil reserves may be assigned in the structurally higher portions of the reservoir only if geoscience, engineering, or performance data and reliable technology establish the higher contact with reasonable certainty.

iv. Reserves which can be produced economically through application of improved recovery techniques (including, but not limited to, fluid injection) are included in the proved classification when:

A. Successful testing by a pilot project in an area of the reservoir with properties no more favorable than in the reservoir as a whole, the operation of an installed program in the reservoir or an analogous reservoir, or other evidence using reliable technology establishes the reasonable certainty of the engineering analysis on which the project or program was based; and

B. The project has been approved for development by all necessary parties and entities, including governmental entities.

v. Existing economic conditions include prices and costs at which economic producibility from a reservoir is to be determined. The price shall be the average price during the 12-month period prior to the ending date of the period covered by the report, determined as an unweighted arithmetic average of the first-day-of-the-month price for each month within such period, unless prices are defined by contractual arrangements, excluding escalations based upon future conditions.

• Probable reserves. Probable reserves are those additional reserves that are less certain to be recovered than proved reserves but which, together with proved reserves, are as likely as not to be recovered.

i. When deterministic methods are used, it is as likely as not that actual remaining quantities recovered will exceed the sum of estimated proved plus probable reserves. When probabilistic methods are used, there should be at least a 50% probability that the actual quantities recovered will equal or exceed the proved plus probable reserves estimates.

ii. Probable reserves may be assigned to areas of a reservoir adjacent to proved reserves where data control or interpretations of available data are less certain, even if the interpreted reservoir continuity of structure or productivity does not meet the reasonable certainty criterion. Probable reserves may be assigned to areas that are structurally higher than the proved area if these areas are in communication with the proved reservoir.

iii. Probable reserves estimates also include potential incremental quantities associated with a greater percentage recovery of the hydrocarbons in place than assumed for proved reserves.

iv. See also guidelines in paragraphs (a)(17)(iv) and (a)(17)(vi) of section 210.4-10(a) of Regulations S-X.

• Possible reserves. Possible reserves are those additional reserves that are less certain to be recovered than probable reserves.

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i. When deterministic methods are used, the total quantities ultimately recovered from a project have a low probability of exceeding proved plus probable plus possible reserves. When probabilistic methods are used, there should be at least a 10% probability that the total quantities ultimately recovered will equal or exceed the proved plus probable plus possible reserves estimates.

ii. Possible reserves may be assigned to areas of a reservoir adjacent to probable reserves where data control and interpretations of available data are progressively less certain. Frequently, this will be in areas where geoscience and engineering data are unable to define clearly the area and vertical limits of commercial production from the reservoir by a defined project.

iii. Possible reserves also include incremental quantities associated with a greater percentage recovery of the hydrocarbons in place than the recovery quantities assumed for probable reserves.

iv. The proved plus probable and proved plus probable plus possible reserves estimates must be based on reasonable alternative technical and commercial interpretations within the reservoir or subject project that are clearly documented, including comparisons to results in successful similar projects.

v. Possible reserves may be assigned where geoscience and engineering data identify directly adjacent portions of a reservoir within the same accumulation that may be separated from proved areas by faults with displacement less than formation thickness or other geological discontinuities and that have not been penetrated by a wellbore, and the registrant believes that such adjacent portions are in communication with the known (proved) reservoir. Possible reserves may be assigned to areas that are structurally higher or lower than the proved area if these areas are in communication with the proved reservoir.

vi. Pursuant to paragraph (a)(22)(iii) of section 210.4-10(a) of Regulations S-X, where direct observation has defined a HKO elevation and the potential exists for an associated gas cap, proved oil reserves should be assigned in the structurally higher portions of the reservoir above the HKO only if the higher contact can be established with reasonable certainty through reliable technology. Portions of the reservoir that do not meet this reasonable certainty criterion may be assigned as probable and possible oil or gas based on reservoir fluid properties and pressure gradient interpretations.

• Reasonable certainty. If deterministic methods are used, reasonable certainty means a high degree of confidence that the quantities will be recovered. A high degree of confidence exists if the quantity is much more likely to be achieved than not, and as changes due to increased availability of geoscience (geological, geophysical and geochemical), engineering and economic data are made to estimated ultimate recovery ("EUR") with time, reasonably certain EUR is much more likely to increase or remain constant than to decrease.

• Deterministic estimate. The method of estimating reserves or resources is called deterministic when a single value for each parameter (from the geoscience, engineering, or economic data) in the reserves calculation is used in the reserves estimation procedure.

• Probabilistic estimate. The method of estimating reserves or resources is called probabilistic when the full range of values that could reasonably occur for each unknown parameter (from the geoscience, engineering or economic data) is used to generate a full range of possible outcomes and their associated probabilities of occurrences.

• Developed oil and gas reserves. Developed oil and gas reserves are reserves of any category that can be expected to be recovered:

i. Through existing wells with existing equipment and operating methods or in which the cost of the required equipment is relatively minor compared with the cost of a new well; and

ii. Through installed extraction equipment and infrastructure operational at the time of the reserves estimate if the extraction is by means not involving a well.

• Undeveloped oil and gas reserves. Undeveloped oil and gas reserves are reserves of any category that are expected to be recovered from new wells on undrilled acreage, or from existing wells where a relatively major expenditure is required for recompletion.

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i. Reserves on undrilled acreage shall be limited to those directly offsetting development spacing areas that are reasonably certain of production when drilled, unless evidence using reliable technology exists that establishes reasonable certainty of economic producibility at greater distances.

ii. Undrilled locations can be classified as having undeveloped reserves only if a development plan has been adopted indicating that they are scheduled to be drilled within five years, unless the specific circumstances, justify a longer time.

iii. Under no circumstances shall estimates for undeveloped reserves be attributable to any acreage for which an application of fluid injection or other improved recovery technique is contemplated, unless such techniques have been proved effective by actual projects in the same reservoir or an analogous reservoir, as defined in paragraph (a)(2) of section 201.4-10(a) of Regulation S-X, or by other evidence using reliable technology establishing reasonable certainty.

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PART I - Financial Information

Item 1. Financial Statements

Gran Tierra Energy Inc.

Condensed Consolidated Statements of Operations and Retained Earnings (Unaudited)

(Thousands of U.S. Dollars, Except Share and Per Share Amounts)

	Three Months Ended September 30,						Nine Months Ended September 30,
	2014			2013			2014			2013
REVENUE AND OTHER INCOME
Oil and natural gas sales	$	161,517		$	170,825		$	460,510		$	507,315
Interest income	772			519			2,160			1,190
	162,289			171,344			462,670			508,505
EXPENSES
Operating	33,949			25,069			81,161			81,082
Depletion, depreciation, accretion and impairment	53,936			51,269			140,137			157,323
General and administrative	13,350			11,768			40,145			29,880
Foreign exchange (gain) loss	(12,438		)	430			(6,604		)	(18,549		)
Financial instruments loss (gain) (Note 10)	2,790			—			(2,223		)	—
Other loss (Notes 9 and 10)	—			—			—			4,400
	91,587			88,536			252,616			254,136
INCOME FROM CONTINUING OPERATIONS BEFORE INCOME TAXES	70,702			82,808			210,054			254,369
Income tax expense (Note 8)	(26,518		)	(42,595		)	(84,614		)	(104,572		)
INCOME FROM CONTINUING OPERATIONS	44,184			40,213			125,440			149,797
Loss from discontinued operations, net of income taxes (Note 3)	—			(7,156		)	(26,990		)	(11,044		)
NET INCOME AND COMPREHENSIVE INCOME	44,184			33,057			98,450			138,753
RETAINED EARNINGS, BEGINNING OF PERIOD	465,227			390,369			410,961			284,673
RETAINED EARNINGS, END OF PERIOD	$	509,411		$	423,426		$	509,411		$	423,426
INCOME (LOSS) PER SHARE
BASIC
INCOME FROM CONTINUING OPERATIONS	$	0.15		$	0.15		$	0.44		$	0.53
LOSS FROM DISCONTINUED OPERATIONS, NET OF INCOME TAXES	—			(0.03		)	(0.09		)	(0.04		)
NET INCOME	$	0.15		$	0.12		$	0.35		$	0.49
DILUTED
INCOME FROM CONTINUING OPERATIONS	$	0.15		$	0.15		$	0.44		$	0.53
LOSS FROM DISCONTINUED OPERATIONS, NET OF INCOME TAXES	—			(0.03		)	(0.09		)	(0.04		)
NET INCOME	$	0.15		$	0.12		$	0.35		$	0.49
WEIGHTED AVERAGE SHARES OUTSTANDING - BASIC (Note 6)	285,576,898			283,092,224			284,203,679			282,687,871
WEIGHTED AVERAGE SHARES OUTSTANDING - DILUTED (Note 6)	288,059,601			286,026,519			287,569,347			285,820,007

(See notes to the condensed consolidated financial statements)

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Gran Tierra Energy Inc.

Condensed Consolidated Balance Sheets (Unaudited)

(Thousands of U.S. Dollars, Except Share and Per Share Amounts)

	September 30,		December 31,
	2014		2013
ASSETS
Current Assets
Cash and cash equivalents	$	360,430	$	428,800
Restricted cash	508		1,478
Accounts receivable	104,436		49,703
Marketable securities (Note 10)	11,711		—
Other financial instruments (Note 10)	414		—
Inventory (Note 5)	13,866		13,725
Taxes receivable	10,937		9,980
Prepaids	3,439		6,450
Deferred tax assets (Note 8)	1,099		2,256
Total Current Assets	506,840		512,392
Oil and Gas Properties (using the full cost method of accounting)
Proved	768,107		794,069
Unproved	516,657		456,001
Total Oil and Gas Properties	1,284,764		1,250,070
Other capital assets	9,519		10,102
Total Property, Plant and Equipment (Note 5)	1,294,283		1,260,172
Other Long-Term Assets
Restricted cash	2,392		2,300
Deferred tax assets (Note 8)	1,696		1,407
Taxes receivable	9,100		18,535
Other long-term assets	6,554		7,163
Goodwill	102,581		102,581
Total Other Long-Term Assets	122,323		131,986
Total Assets	$	1,923,446	$	1,904,550
LIABILITIES AND SHAREHOLDERS’ EQUITY
Current Liabilities
Accounts payable	$	49,178	$	72,400
Accrued liabilities	89,882		89,567
Other financial instruments (Note 10)	652		—
Taxes payable	29,168		102,887
Deferred tax liabilities (Note 8)	1,461		1,193
Asset retirement obligation (Note 7)	7,353		518
Total Current Liabilities	177,694		266,565
Long-Term Liabilities
Deferred tax liabilities (Note 8)	168,495		177,082
Asset retirement obligation (Note 7)	19,565		21,455
Other long-term liabilities	12,333		9,540
Total Long-Term Liabilities	200,393		208,077
Contingencies (Note 9)
Shareholders’ Equity
Common Stock (Note 6) (276,018,597 and 272,327,810 shares of Common Stock and 10,221,506 and 10,882,440 exchangeable shares, par value $0.001 per share, issued and outstanding as at September 30, 2014, and December 31, 2013, respectively)	10,190		10,187
Additional paid in capital	1,025,758		1,008,760
Retained earnings	509,411		410,961
Total Shareholders’ Equity	1,545,359		1,429,908
Total Liabilities and Shareholders’ Equity	$	1,923,446	$	1,904,550

(See notes to the condensed consolidated financial statements)

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Gran Tierra Energy Inc.

Condensed Consolidated Statements of Cash Flows (Unaudited)

(Thousands of U.S. Dollars)

	Nine Months Ended September 30,
	2014			2013
Operating Activities
Net income	$	98,450		$	138,753
Adjustments to reconcile net income to net cash provided by operating activities:
Loss from discontinued operations, net of income taxes (Note 3)	26,990			11,044
Depletion, depreciation, accretion and impairment	140,137			157,323
Deferred tax expense (recovery) (Note 8)	1,431			(23,494		)
Non-cash stock-based compensation	4,341			5,505
Unrealized foreign exchange gain	(9,251		)	(16,850		)
Unrealized financial instruments loss	2,439			—
Equity tax	(3,283		)	(3,345		)
Cash settlement of asset retirement obligation (Note 7)	(211		)	(927		)
Other loss (Notes 9 and 10)	—			4,400
Net change in assets and liabilities from operating activities of continuing operations
Accounts receivable and other long-term assets	(61,224		)	(35,574		)
Inventory	(1,688		)	12,592
Prepaids	2,565			(1,090		)
Accounts payable and accrued and other liabilities	(981		)	(8,332		)
Taxes receivable and payable	(55,084		)	80,932
Net cash provided by operating activities of continuing operations	144,631			320,937
Net cash (used in) provided by operating activities of discontinued operations	(4,792		)	28,150
Net cash provided by operating activities	139,839			349,087
Investing Activities
Decrease (increase) in restricted cash	877			(4,936		)
Additions to property, plant and equipment	(250,634		)	(249,606		)
Proceeds from sale of Argentina business unit, net of cash sold and transaction costs	42,755			—
Proceeds from sale of oil and gas properties (Note 5)	—			55,524
Net cash used in investing activities of continuing operations	(207,002		)	(199,018		)
Net cash used in investing activities of discontinued operations	(12,384		)	(13,104		)
Net cash used in investing activities	(219,386		)	(212,122		)
Financing Activities
Proceeds from issuance of shares of Common Stock (Note 6)	11,177			3,475
Net cash provided by financing activities	11,177			3,475
Net (decrease) increase in cash and cash equivalents	(68,370		)	140,440
Cash and cash equivalents, beginning of period	428,800			212,624
Cash and cash equivalents, end of period	$	360,430		$	353,064
Cash	$	229,018		$	296,520
Term deposits	131,412			56,544
Cash and cash equivalents, end of period	$	360,430		$	353,064
Supplemental cash flow disclosures:
Cash paid for income taxes	$	118,540		$	38,978
Non-cash investing activities:
Net liabilities related to property, plant and equipment, end of period	$	72,410		$	65,645

(See notes to the condensed consolidated financial statements)

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Gran Tierra Energy Inc.

Condensed Consolidated Statements of Shareholders’ Equity (Unaudited)

(Thousands of U.S. Dollars)

	Nine Months Ended September 30,		Year Ended December 31,
	2014		2013
Share Capital
Balance, beginning of period	$	10,187	$	7,986
Issue of shares of Common Stock (Note 6)	3		2,201
Balance, end of period	10,190		10,187
Additional Paid in Capital
Balance, beginning of period	1,008,760		998,772
Exercise of stock options (Note 6)	11,174		1,570
Stock-based compensation (Note 6)	5,824		8,418
Balance, end of period	1,025,758		1,008,760
Retained Earnings
Balance, beginning of period	410,961		284,673
Net income	98,450		126,288
Balance, end of period	509,411		410,961
Total Shareholders’ Equity	$	1,545,359	$	1,429,908

(See notes to the condensed consolidated financial statements)

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Gran Tierra Energy Inc.

Notes to the Condensed Consolidated Financial Statements (Unaudited)

(Expressed in U.S. Dollars, unless otherwise indicated)

1. Description of Business

Gran Tierra Energy Inc., a Nevada corporation (the “Company” or “Gran Tierra”), is a publicly traded oil and gas company engaged in the acquisition, exploration, development and production of oil and natural gas properties. The Company’s principal business activities are in Colombia, Peru and Brazil. Until June 25, 2014, the Company also had business activities in Argentina (Note 3).

2. Significant Accounting Policies

These interim unaudited condensed consolidated financial statements have been prepared in accordance with generally accepted accounting principles in the United States of America (“GAAP”). The information furnished herein reflects all normal recurring adjustments that are, in the opinion of management, necessary for the fair presentation of results for the interim periods.

The note disclosure requirements of annual consolidated financial statements provide additional disclosures to that required for interim unaudited condensed consolidated financial statements. Accordingly, these interim unaudited condensed consolidated financial statements should be read in conjunction with the Company’s consolidated financial statements as at and for the year ended December 31, 2013, included in the Company’s 2013 Annual Report on Form 10-K, filed with the Securities and Exchange Commission (“SEC”) on February 26, 2014.

The Company’s significant accounting policies are described in Note 2 of the consolidated financial statements which are included in the Company’s 2013 Annual Report on Form 10-K and are the same policies followed in these interim unaudited condensed consolidated financial statements, except as disclosed below. The Company has evaluated all subsequent events through to the date these interim unaudited condensed consolidated financial statements were issued.

Discontinued Operations

During the three months ended June 30, 2014, the Company completed the sale of its Argentina business unit and the discontinued operations criteria of Accounting Standards Codification ("ASC") 205-20, “Discontinued Operations” were met. Therefore, the results of the Company’s Argentina business unit are reflected separately as loss from discontinued operations, net of income taxes in the interim unaudited condensed consolidated statement of operations for the three and nine months ended September 30, 2014 and 2013, on a line immediately after “Income from continuing operations.” Additionally, cash flows of the Company’s Argentina business unit are reflected separately in the interim unaudited condensed consolidated statement of cash flows for the three and nine months ended September 30, 2014 and 2013 as cash provided by or used in operating and investing activities of discontinued operations. Amounts for 2013 have been reclassified to conform to the 2014 presentation. The reclassifications had no effect on net income. See Note 3, “Discontinued Operations,” for additional disclosure. The Company did not recognize depletion, depreciation and accretion expenses subsequent to May 29, 2014, the date the assets were classified as held for sale.

Marketable Securities

The Company acquired investments in marketable securities in connection with the sale of its Argentina business unit. Marketable securities were classified as trading securities, in accordance with ASC 320, “Investments – Debt and Equity Securities”, and are recorded in the consolidated balance sheet at fair value. The Company classifies trading securities as current or non-current based on the intent of management, the nature of the trading securities and whether they are readily available for use in current operations. Gains or losses on trading securities are recorded in the statement of operations as financial instruments gains or losses.

Foreign Currency Derivatives

The Company purchases Colombian peso non-deliverable forward contracts for purposes of fixing exchange rates at which it will purchase or sell Colombian pesos to settle its income tax installment payments. The Company does not intend to issue or hold derivative financial instruments for speculative trading purposes.

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The Company records derivative instruments on the balance sheet as either an asset or liability measured at fair value. The accounting for changes in the fair value of a derivative instrument depends on the intended use of the derivative and the resulting designation, which is established at the inception of a derivative. Generally because of the short-term nature of the contracts and their limited use, the Company does not apply hedge accounting, and changes in the fair value of those contracts are reflected in net income as financial instrument gains or losses in the interim unaudited condensed consolidated statement of operations. Cash settlements of the Company's derivative arrangements are classified as operating cash flows.

The fair value of foreign currency derivatives is based on the estimated maturity value of the foreign exchange non-deliverable forward contracts, using applicable forward exchange rates. The most significant variable to the cash flow calculations is the estimation of forward foreign exchange rates. The resulting net future cash inflows or outflows at maturity of the contracts are the net value of the contract.

Recently Adopted Accounting Pronouncements

Obligations Resulting from Joint and Several Liability Arrangements for Which the Total Amount of the Obligation is fixed at the Reporting Date

In February 2013, the Financial Accounting Standards Board (“FASB”) issued Accounting Standards Update (“ASU”) 2013- 04, “Obligations Resulting from Joint and Several Liability Arrangements for Which the Total Amount of the Obligation is fixed at the Reporting Date”. The ASU provides guidance for the recognition, measurement, and disclosure of obligations resulting from joint and several liability arrangements for which the total amount of the obligation is fixed at the reporting date. Examples of obligations within the scope of this update include debt arrangements, other contractual obligations, and settled litigation and judicial rulings. The ASU was effective for fiscal years, and interim periods within those years, beginning after December 15, 2013. The implementation of this update did not materially impact the Company’s consolidated financial position, results of operations, cash flows or disclosure.

Presentation of an Unrecognized Tax Benefit When a Net Operating Loss Carryforward, a Similar Tax Loss, or a Tax Credit Carryforward Exists

In July 2013, the FASB issued ASU 2013-11, “Presentation of an Unrecognized Tax Benefit When a Net Operating Loss Carryforward, a Similar Tax Loss, or a Tax Credit Carryforward Exists". The ASU provides guidance on the financial statement presentation of an unrecognized tax benefit when a net operating loss carryforward, a similar tax loss, or a tax credit carryforward exists. The ASU was effective for fiscal years, and interim periods within those years, beginning after December 15, 2013. The implementation of this update did not materially impact the Company’s consolidated financial position, results of operations, cash flows, or disclosure.

Recently Issued Accounting Pronouncements

Revenue from Contracts with Customers

In May 2014, the FASB issued ASU 2014-09, “Revenue from Contracts with Customers". The ASU creates a single source of revenue guidance for all companies in all industries and requires revenue recognition to depict the transfer of goods or services to customers in an amount that reflects the consideration to which the entity expects to be entitled in exchange for those goods or services. ASU 2014-09 sets forth a new revenue recognition model that requires identifying the contract, identifying the performance obligations, determining the transaction price, allocating the transaction price to performance obligations and recognizing the revenue upon satisfaction of performance obligations. The amendments in the ASU can be applied either retrospectively to each prior reporting period presented or retrospectively with the cumulative effect of initially applying the update recognized at the date of the initial application along with additional disclosures. The ASU will be effective for fiscal years, and interim periods within those years, beginning after December 15, 2016. The Company is currently assessing the impact the new standard will have on its consolidated financial position, results of operations, cash flows, and disclosure.

3. Discontinued Operations

On June 25, 2014, the Company, through several of its indirect subsidiaries (the “Selling Subsidiaries”), sold its Argentina business unit to Madalena Energy Inc. ("Madalena") for aggregate consideration of $69.3 million, comprising $55.4 million in cash and $13.9 million in Madalena shares.

The sale was made pursuant to agreements entered into by the Selling Subsidiaries (the “Agreements”); specifically, pursuant to the Agreements: (1) Madalena agreed to acquire from Gran Tierra Argentina Holdings ULC, an Alberta corporation (“GTE

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ULC”), and PCESA Petroleros Canadienses de Ecuador S.A., an Ecuador corporation (“PCESA”), both indirect subsidiaries of the Company, all of the outstanding shares of the Company’s indirect subsidiaries Gran Tierra Energy Argentina S.R.L. (“GTE Argentina”) and P.E.T.J.A. S.A, and agreed to acquire certain debt owed by GTE Argentina, for (a) approximately $44.8 million in cash, plus certain other adjustments and interest, and (b) shares of Madalena stock valued at $13.9 million; and (2) Madalena agreed to acquire from Gran Tierra Petroco Inc., an Alberta corporation (“Petroco”), an indirect subsidiary of the Company, all of the outstanding shares of the Company’s indirect subsidiary Petrolifera Petroleum Limited (“PPL”), and agreed to acquire certain debt owed by PPL , for approximately $10.6 million in cash, plus certain other adjustments and interest. Collectively, GTE Argentina, P.E.T.J.A. S.A., PPL and PPL’s subsidiaries held all of the assets of the Gran Tierra Energy Argentina business unit.

Accordingly, the results of the Company’s Argentina business unit are classified as “Loss from discontinued operations, net of income taxes” on the consolidated statements of operations for the three and nine months ended September 30, 2014, and 2013. Additionally, cash flows of the Company’s Argentina business unit are reflected separately in the interim unaudited condensed consolidated statement of cash flows for the three and nine months ended September 30, 2014 and 2013 as cash provided by or used in operating and investing activities of discontinued operations. Amounts for 2013 have been reclassified to conform to the 2014 presentation. The reclassifications had no effect on net income.

Revenue and other income and loss from discontinued operations for the three and nine months ended September 30, 2014, and 2013, were as follows:

	Three Months Ended September 30,					Nine Months Ended September 30,
(Thousands of U.S. Dollars)	2014		2013			2014			2013
Revenue and other income	$	—	$	18,316		$	31,985		$	55,335
Loss from operations of discontinued operations before income taxes	$	—	$	(4,163	)	$	(6,252	)	$	(6,253	)
Income tax expense	—		(2,993		)	(1,458		)	(4,791		)
Loss from operations of discontinued operations	—		(7,156		)	(7,710		)	(11,044		)
Loss on sale before income taxes	—		—			(18,235		)	—
Income tax expense	—		—			(1,045		)	—
Loss on sale	—		—			(19,280		)	—
Loss from discontinued operations, net of income taxes	$	—	$	(7,156	)	$	(26,990	)	$	(11,044	)

The Company classified the Argentina business unit as held for sale at May 29, 2014. The Company did not meet the criteria to classify the Argentina business unit as held for sale at March 31, 2014, or prior periods. The cost center ceiling with respect to the Company’s Argentina full cost pool exceeded the net capitalized cost of the cost center at March 31, 2014, and as such, no ceiling test writedown was required. In the year ended December 31, 2013, the Company recorded a ceiling test impairment loss of $30.8 million in the Company's Argentina cost center as a result of deferred investment and inconclusive waterflood results.

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At December 31, 2013, assets and liabilities related to discontinued operations were as follows:

	As at
(Thousands of U.S. Dollars)	December 31, 2013
Current assets (1)	$	39,125
Property, plant and equipment	94,446
Other long-term assets	1,839
	$	135,410
Current liabilities	$	37,612
Long-term liabilities	9,755
	$	47,367

(1) Included cash of $21.2 million.

4. Segment and Geographic Reporting

The Company is primarily engaged in the exploration and production of oil and natural gas. The Company’s reportable segments are Colombia, Peru and Brazil based on geographic organization. Prior to classifying the Company’s Argentina business unit as discontinued operations (Note 3), Argentina was a reportable segment. The All Other category represents the Company’s corporate activities. The amounts disclosed in the tables below exclude the results of the Argentina business unit unless otherwise noted. Certain subsidiaries which were previously included in the All Other category were sold as part of the Argentina business unit, and therefore amounts disclosed in the All Other category have been reclassified to exclude amounts reported in loss from discontinued operations. The Company evaluates reportable segment performance based on income or loss from continuing operations before income taxes.

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The following tables present information on the Company’s reportable segments and other activities:

	Three Months Ended September 30, 2014
(Thousands of U.S. Dollars, except per unit of production amounts)	Colombia		Peru			Brazil			All Other			Total
Oil and natural gas sales	$	153,815	$	—		$	7,702		$	—		$	161,517
Interest income	98		1			433			240			772
Depletion, depreciation, accretion and impairment	51,144		109			2,429			254			53,936
Depletion, depreciation, accretion and impairment - per unit of production	28.31		—			26.30			—			28.40
Income (loss) from continuing operations before income taxes	81,258		(3,345		)	1,746			(8,957		)	70,702
Segment capital expenditures	50,785		40,730			3,377			527			95,419
	Three Months Ended September 30, 2013
(Thousands of U.S. Dollars, except per unit of production amounts)	Colombia		Peru			Brazil			All Other			Total
Oil and natural gas sales	$	164,241	$	—		$	6,584		$	—		$	170,825
Interest income	111		1			281			126			519
Depletion, depreciation, accretion and impairment	46,821		73			4,129			246			51,269
Depletion, depreciation, accretion and impairment - per unit of production	27.48		—			59.72			—			28.92
Income (loss) from continuing operations before income taxes	89,215		(1,404		)	(337		)	(4,666		)	82,808
Segment capital expenditures (1)	39,608		11,063			(22,500		)	289			28,460
	Nine Months Ended September 30, 2014
(Thousands of U.S. Dollars, except per unit of production amounts)	Colombia		Peru			Brazil			All Other			Total
Oil and natural gas sales	$	438,100	$	—		$	22,410		$	—		$	460,510
Interest income	419		1			1,292			448			2,160
Depletion, depreciation, accretion and impairment	131,742		420			7,249			726			140,137
Depletion, depreciation, accretion and impairment - per unit of production	26.70		—			29.24			—			27.05
Income (loss) from continuing operations before income taxes	229,750		(7,811		)	7,446			(19,331		)	210,054
Segment capital expenditures	147,016		103,535			17,176			1,132			268,859
	Nine Months Ended September 30, 2013
(Thousands of U.S. Dollars, except per unit of production amounts)	Colombia		Peru			Brazil			All Other			Total
Oil and natural gas sales	$	488,577	$	—		$	18,738		$	—		$	507,315
Interest income	415		27			292			456			1,190
Depletion, depreciation, accretion and impairment	141,141		272			15,143			767			157,323
Depletion, depreciation, accretion and impairment - per unit of production	27.58		—			75.74			—			29.59
Income (loss) from continuing operations before income taxes	275,353		(4,984		)	(3,663		)	(12,337		)	254,369
Segment capital expenditures (1)	118,758		59,911			12,021			528			191,218

(1) In the third quarter of 2013, segment capital expenditures were net of proceeds of $54.0 million relating to termination of a farm-in agreement in Brazil. Additionally, segment capital expenditures for the nine months ended September 30, 2013, were net of proceeds of $1.5 million relating to the Company's sale of its 15% working interest in the Mecaya Block in Colombia (Note 5).

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	As at September 30, 2014
(Thousands of U.S. Dollars)	Colombia		Peru		Brazil		All Other		Total Excluding Discontinued Operations		Discontinued Operations		Total
Property, plant and equipment	$	865,331	$	281,646	$	143,938	$	3,368	$	1,294,283	$	—	$	1,294,283
Goodwill	102,581		—		—		—		102,581		—		102,581
All other assets	264,064		31,439		19,989		211,090		526,582		—		526,582
Total Assets	$	1,231,976	$	313,085	$	163,927	$	214,458	$	1,923,446	$	—	$	1,923,446
	As at December 31, 2013
(Thousands of U.S. Dollars)	Colombia		Peru		Brazil		All Other		Total Excluding Discontinued Operations		Discontinued Operations		Total
Property, plant and equipment	$	850,359	$	178,531	$	133,874	$	2,962	$	1,165,726	$	94,446	$	1,260,172
Goodwill	102,581		—		—		—		102,581		—		102,581
All other assets	233,336		24,240		24,477		218,780		500,833		40,964		541,797
Total Assets	$	1,186,276	$	202,771	$	158,351	$	221,742	$	1,769,140	$	135,410	$	1,904,550

The Company’s revenues are derived principally from uncollateralized sales to customers in the oil and natural gas industry. The concentration of credit risk in a single industry affects the Company’s overall exposure to credit risk because customers may be similarly affected by changes in economic and other conditions.

In the three months ended September 30, 2014, the Company had three significant customers in Colombia: Ecopetrol S.A. ("Ecopetrol"), Hocol Petroleum Limited ("Hocol") and one other customer, which accounted for 37%, 11% and 38%, respectively, of the Company's consolidated oil and natural gas sales from continuing operations. For the three months ended September 30, 2013, sales to Ecopetrol and the other customer accounted for 61% and 31%, respectively, of the Company's consolidated oil and natural gas sales from continuing operations. In the nine months ended September 30, 2014 and 2013, sales to Ecopetrol accounted for 46% and 57%, respectively, and sales to the other customer accounted for 38% and 32%, respectively, of the Company's consolidated oil and natural gas sales from continuing operations. Sales to Hocol were not significant in the nine months ended September 30, 2014, or in the three and nine months ended September 30, 2013.

5. Property, Plant and Equipment and Inventory

Property, Plant and Equipment

	As at September 30, 2014							As at December 31, 2013
(Thousands of U.S. Dollars)	Cost		Accumulated depletion, depreciation and impairment			Net book value		Cost		Accumulated depletion, depreciation and impairment			Net book value
Oil and natural gas properties
Proved	$	1,927,314	$	(1,159,207	)	$	768,107	$	1,799,544	$	(1,005,475	)	$	794,069
Unproved	516,657		—			516,657		456,001		—			456,001
	2,443,971		(1,159,207		)	1,284,764		2,255,545		(1,005,475		)	1,250,070
Furniture and fixtures and leasehold improvements	9,202		(7,028		)	2,174		8,919		(6,568		)	2,351
Computer equipment	13,732		(6,820		)	6,912		14,786		(7,605		)	7,181
Automobiles	802		(369		)	433		1,381		(811		)	570
Total Property, Plant and Equipment	$	2,467,707	$	(1,173,424	)	$	1,294,283	$	2,280,631	$	(1,020,459	)	$	1,260,172

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Depletion and depreciation expense from continuing operations on property, plant and equipment for the three months ended September 30, 2014, was $49.9 million (three months ended September 30, 2013 - $51.5 million) and for the nine months ended September 30, 2014, was $140.4 million (nine months ended September 30, 2013 - $150.3 million). A portion of depletion and depreciation expense was recorded as inventory in each period and adjusted for inventory changes. In the second quarter of 2013, the Company recorded a ceiling test impairment loss of $2.0 million in the Company's Brazil cost center as a result of lower realized prices and increased operating costs.

On August 6, 2014, the Company announced proved reserves, net after royalty and calculated in accordance with SEC rules as of May 31, 2014, for the Tiê field, in Brazil increased after production for the five months ended May 31, 2014, to 3.0 MMBOE from 1.7 MMBOE, proved and probable reserves increased to 4.9 MMBOE from 3.3 MMBOE and proved, probable and possible reserves increased to 7.2 MMBOE from 5.0 MMBOE. The reserve revisions were due to new production from the Agua Grande formation, results of seismic reprocessing, and additional reservoir volume in the Sergi formation.

In the second quarter of 2013, the Company received proceeds of $1.5 million relating to a sale of its 15% working interest in the Mecaya Block in Colombia.

During the third quarter of 2013, the Company received a net payment of $54.0 million (before income taxes) from a third party in connection with termination of a farm-in agreement in the Recôncavo Basin relating to Block REC-T-129, Block REC-T-142, Block REC-T-155 and Block REC-T-224.

During the third quarter of 2014, the Agência Nacional de Petróleo, Gás Natural e Biocombustíveis ("ANP") in Brazil granted the Company extensions or suspensions of the first exploration phase of the concession agreements on Blocks REC-T-129, REC-T-142 and REC-T-155 to May 24, 2015. The exploration phase of the concession agreement on Block REC-T-224 was due to expire on December 11, 2013; however, under the concession agreements the Company was able and did submit an application to the ANP for a suspension of the exploration phase of this block. The Company has not yet received a decision from the ANP regarding this suspension application. At September 30, 2014, unproved properties included $3.6 million relating to exploration expenditures on this block. Management assessed this block for impairment at September 30, 2014, and concluded no impairment had occurred.

Unproved oil and natural gas properties consist of exploration lands held in Colombia, Peru and Brazil. As at September 30, 2014, the Company had $170.2 million (December 31, 2013 - $176.1 million) of unproved assets in Colombia, $280.4 million (December 31, 2013 - $177.5 million) of unproved assets in Peru, and $66.1 million (December 31, 2013 - $84.2 million) of unproved assets in Brazil for a total of $516.7 million (December 31, 2013 - $437.8 million). At December 31, 2013, the Company had $18.2 million of unproved assets in Argentina, which were sold as part of the sale of the Argentina business unit on June 25, 2014. Unproved oil and natural gas properties are being held for their exploration value and are not being depleted pending determination of the existence of proved reserves. Gran Tierra will continue to assess the unproved properties over the next several years as proved reserves are established and as exploration warrants whether or not future areas will be developed.

Inventory

At September 30, 2014, oil and supplies inventories were $11.5 million and $2.4 million, respectively (December 31, 2013 - $11.7 million and $2.0 million, respectively).

6. Share Capital

The Company’s authorized share capital consists of 595,000,002 shares of capital stock, of which 570 million are designated as Common Stock, par value $0.001 per share, 25 million are designated as Preferred Stock, par value $0.001 per share, and two shares are designated as special voting stock, par value $0.001 per share.

As at September 30, 2014, outstanding share capital consists of 276,018,597 shares of Common Stock of the Company, 5,687,379 exchangeable shares of Gran Tierra Exchangeco Inc., (the "Exchangeco exchangeable shares") and 4,534,127 exchangeable shares of Gran Tierra Goldstrike Inc. (the "Goldstrike exchangeable shares"). The redemption date for the Exchangeco exchangeable shares and the Goldstrike exchangeable shares is a date to be established by the applicable Board of Directors. During the nine months ended September 30, 2014, 3,029,853 shares of Common Stock were issued upon the exercise of stock options and 660,934 shares of Common Stock were issued upon the exchange of the Exchangeco exchangeable shares.

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The holders of shares of Common Stock are entitled to one vote for each share on all matters submitted to a stockholder vote and are entitled to share in all dividends that the Company’s Board of Directors, in its discretion, declares from legally available funds. The holders of Common Stock have no pre-emptive rights, no conversion rights, and there are no redemption provisions applicable to the shares. Holders of exchangeable shares have substantially the same rights as holders of shares of Common Stock. Each exchangeable share is exchangeable into one share of Common Stock of the Company.

Restricted Stock Units and Stock Options

The Company grants time-vested restricted stock units ("RSUs") to certain officers, employees and consultants. Additionally, the Company grants options to purchase shares of Common Stock to certain directors, officers, employees and consultants. The following table provides information about RSU and stock option activity for the nine months ended September 30, 2014:

	RSUs		Options
	Number of Outstanding Share Units		Number of Outstanding Options		Weighted Average Exercise Price $/Option
Balance, December 31, 2013	922,045		15,668,458		5.41
Granted	903,205		2,407,730		7.06
Exercised	(415,538	)	(3,029,853	)	(3.68	)
Forfeited	(50,980	)	(197,676	)	(6.59	)
Expired	—		(720,724	)	(7.12	)
Balance, September 30, 2014	1,358,732		14,127,935		5.96

For the nine months ended September 30, 2014, 3,029,853 shares of Common Stock were issued for cash proceeds of $11.2 million upon the exercise of stock options (nine months ended September 30, 2013 - $3.5 million).

The weighted average grant date fair value for options granted in the three months ended September 30, 2014, was $2.21 (three months ended September 30, 2013 - $2.34) and for the nine months ended September 30, 2014, was $2.50 (nine months ended September 30, 2013 - $2.62).

The amounts recognized for stock-based compensation were as follows:

(Thousands of U.S. Dollars)	Three Months Ended September 30,						Nine Months Ended September 30,
	2014			2013			2014			2013
Compensation costs for stock options	$	1,961		$	2,133		$	5,824		$	6,314
Compensation costs for RSUs	326			1,282			3,967			1,901
	2,287			3,415			9,791			8,215
Less: Stock-based compensation costs capitalized	(278		)	(1,718		)	(2,100		)	(2,102		)
Stock-based compensation costs expensed	$	2,009		$	1,697		$	7,691		$	6,113

Of the total compensation expense for the three months ended September 30, 2014, $2.0 million (three months ended September 30, 2013 - $1.3 million) was recorded in G&A expenses, $nil (three months ended September 30, 2013 – $0.1 million) was recorded in operating expenses and $nil (three months ended September 30, 2013 – $0.3 million ) was recorded in loss from discontinued operations. Of the total compensation expense for the nine months ended September 30, 2014, $6.1 million (nine months ended September 30, 2013 – $5.1 million) was recorded in G&A expenses, $0.3 million (nine months ended September 30, 2013 – $0.4 million) was recorded in operating expenses and $1.3 million (nine months ended September 30, 2013 - $0.6 million) was recorded in loss from discontinued operations.

At September 30, 2014, there was $8.6 million (December 31, 2013 - $8.1 million) of unrecognized compensation cost related to unvested stock options and RSUs which is expected to be recognized over a weighted average period of 2.9 years. The vesting of certain RSUs and stock options was accelerated as a result of the sale of the Argentina business unit and the retirement of our former Chief Operating Officer.

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Income per share

Basic income per share is calculated by dividing net income attributable to common shareholders by the weighted average number of shares of Common Stock and exchangeable shares issued and outstanding during each period. Diluted income per share is calculated by adjusting the weighted average number of shares of Common Stock and exchangeable shares outstanding for the dilutive effect, if any, of share equivalents. The Company uses the treasury stock method to determine the dilutive effect. This method assumes that all Common Stock equivalents have been exercised at the beginning of the period (or at the time of issuance, if later), and that the funds obtained thereby were used to purchase shares of Common Stock of the Company at the volume weighted average trading price of shares of Common Stock during the period.

	Three Months Ended September 30,				Nine Months Ended September 30,
	2014		2013		2014		2013
Weighted average number of common and exchangeable shares outstanding	285,576,898		283,092,224		284,203,679		282,687,871
Weighted average shares issuable pursuant to stock options	8,117,355		12,428,489		9,399,930		10,823,968
Weighted average shares assumed to be purchased from proceeds of stock options	(5,634,652	)	(9,494,194	)	(6,034,262	)	(7,691,832	)
Weighted average number of diluted common and exchangeable shares outstanding	288,059,601		286,026,519		287,569,347		285,820,007

For the three months ended September 30, 2014, 6,884,227 options (three months ended September 30, 2013 - 3,472,472 options) were excluded from the diluted income per share calculation as the options were anti-dilutive. For the nine months ended September 30, 2014, 6,925,117 options (nine months ended September 30, 2013 - 5,584,732 options) were excluded from the diluted income per share calculation as the options were anti-dilutive.

7. Asset Retirement Obligation

Changes in the carrying amounts of the asset retirement obligation associated with the Company’s oil and natural gas properties were as follows:

	Nine Months Ended			Year Ended
(Thousands of U.S. Dollars)	September 30, 2014			December 31, 2013
Balance, beginning of period	$	21,973		$	18,292
Settlements	(211		)	(2,068		)
Liability incurred	10,262			2,623
Liabilities associated with the Argentina business unit sold (Note 3)	(10,170		)	—
Foreign exchange	(14		)	(25		)
Accretion	1,022			1,279
Revisions in estimated liability	4,056			1,872
Balance, end of period	$	26,918		$	21,973
Asset retirement obligation - current	$	7,353		$	518
Asset retirement obligation - long-term	19,565			21,455
Balance, end of period	$	26,918		$	21,973

Revisions to estimated liabilities relate primarily to changes in estimates of asset retirement costs and include, but are not limited to, revisions of estimated inflation rates, changes in property lives and the expected timing of settling the asset retirement obligation. At September 30, 2014, the fair value of assets that are legally restricted for purposes of settling the asset retirement obligation was $2.4 million (December 31, 2013 - $1.9 million). These assets are included in restricted cash on the Company's interim unaudited condensed consolidated balance sheet.

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8. Taxes

The income tax expense reported differs from the amount computed by applying the U.S. statutory rate to income from continuing operations before income taxes for the following reasons:

	Nine Months Ended September 30,
(Thousands of U.S. Dollars)	2014			2013
Income (loss) from continuing operations before income taxes
United States	$	(16,450	)	$	(8,488	)
Foreign	226,504			262,857
	210,054			254,369
	35		%	35		%
Income tax expense from continuing operations expected	73,519			89,029
Foreign currency translation adjustments	(1,464		)	(7,263		)
Impact of foreign taxes	(3,361		)	(3,388		)
Other local taxes	3,192			1,497
Stock-based compensation	2,155			1,887
Increase in valuation allowance	2,146			17,975
Non-deductible third party royalty in Colombia	7,554			8,812
Other permanent differences	873			(3,977		)
Total income tax expense from continuing operations	$	84,614		$	104,572
Current income tax expense from continuing operations
United States	$	990		$	813
Foreign	82,193			127,253
	83,183			128,066
Deferred income tax expense (recovery) from continuing operations
Foreign	1,431			(23,494		)
Total income tax expense from continuing operations	$	84,614		$	104,572

	As at
(Thousands of U.S. Dollars)	September 30, 2014			December 31, 2013
Deferred Tax Assets
Tax benefit of operating loss carryforwards	$	36,367		$	47,154
Tax basis in excess of book basis	40,257			59,168
Foreign tax credits and other accruals	19,917			34,894
Tax benefit of capital loss carryforwards	29,114			4,769
Deferred tax assets before valuation allowance	125,655			145,985
Valuation allowance	(122,860		)	(142,322		)
	$	2,795		$	3,663
Deferred tax assets - current	$	1,099		$	2,256
Deferred tax assets - long-term	1,696			1,407
	2,795			3,663
Deferred tax liabilities - current	(1,461		)	(1,193		)
Deferred tax liabilities - long-term	(168,495		)	(177,082		)
	(169,956		)	(178,275		)
Net Deferred Tax Liabilities	$	(167,161	)	$	(174,612	)

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As at September 30, 2014, the Company had operating loss carryforwards of $122.7 million (December 31, 2013 - $215.4 million) and capital loss carryforwards of $227.0 million (December 31, 2013 – $32.6 million) before valuation allowance. Of these operating loss carryforwards and capital loss carryforwards, $308.8 million (December 31, 2013 - $213.8 million) were losses generated by the foreign subsidiaries of the Company. In certain jurisdictions, the operating loss carryforwards expire between 2014 and 2034 and the capital loss carryforwards expire between 2016 and 2017, while certain other jurisdictions allow operating and capital losses to be carried forward indefinitely.

As at September 30, 2014, the total amount of Gran Tierra’s unrecognized tax benefit related to continuing operations was $4.1 million (December 31, 2013 - $2.9 million), which if recognized would affect the Company’s effective tax rate. To the extent interest and penalties may be assessed by taxing authorities on any underpayment of income tax, such amounts have been accrued and are classified as a component of income taxes in the consolidated statement of operations.

Changes in the Company's unrecognized tax benefit relating to continuing operations are as follows:

	Nine Months Ended September 30,
	2014		2013
(Thousands of U.S. Dollars)
Unrecognized tax benefit relating to continuing operations at beginning of period	$	2,900	$	5,900
Increases for positions relating to prior year	1,200		—
Decreases for positions relating to prior year	—		(3,200		)
Unrecognized tax benefit relating to continuing operations at end of period	$	4,100	$	2,700

The Company and its subsidiaries file income tax returns in U.S. federal and state jurisdictions and certain other foreign jurisdictions. The Company is potentially subject to income tax examinations for the tax years 2006 through 2013 in certain jurisdictions. The Company does not anticipate any material changes to the unrecognized tax benefit disclosed above within the next twelve months.

At September 30, 2014, and December 31, 2013, accounts payable included the remaining unpaid balance of equity tax liability of $nil (December 31, 2013 - $3.3 million), a Colombian tax of 6% on a legislated measure calculated based on the Company’s Colombian segment’s balance sheet equity for tax purposes at January 1, 2011. The tax is payable in eight semi-annual installments over four years, but was expensed in the first quarter of 2011 at the commencement of the four-year period.

9. Contingencies

Gran Tierra Energy Colombia, Ltd. and Petrolifera Petroleum (Colombia) Ltd (collectively “GTEC”) and Ecopetrol, the contracting parties of the Guayuyaco Association Contract, are engaged in a dispute regarding the interpretation of the procedure for allocation of oil produced and sold during the long-term test of the Guayuyaco-1 and Guayuyaco-2 wells, prior to GTEC's purchase of the companies originally involved in the dispute. There was no agreement between the parties, and Ecopetrol filed a lawsuit in the Contravention Administrative Tribunal in the District of Cauca (the "Tribunal") regarding this matter. During the first quarter of 2013, the Tribunal ruled in favor of Ecopetrol and awarded Ecopetrol 44,025 bbl of oil. GTEC has filed an appeal of the ruling to the Supreme Administrative Court (Consejo de Estado) in a second instance procedure. During the three months ended March 31, 2013, based on market oil prices in Colombia, Gran Tierra accrued $4.4 million in the interim unaudited condensed consolidated financial statements in relation to this dispute (Note 10).

Gran Tierra’s production from the Costayaco Exploitation Area is subject to an additional royalty (the "HPR royalty"), which applies when cumulative gross production from an Exploitation Area is greater than five MMbbl. The HPR royalty is calculated on the difference between a trigger price defined in the Chaza Block exploration and production contract (the "Chaza Contract") and the sales price. The Agencia Nacional de Hidrocarburos (National Hydrocarbons Agency) (“ANH”) has interpreted the Chaza Contract as requiring that the HPR royalty must be paid with respect to all production from the Moqueta Exploitation Area and initiated a noncompliance procedure under the Chaza Contract, which was contested by Gran Tierra because the Moqueta Exploitation Area and the Costayaco Exploitation Area are separate Exploitation Areas. ANH did not proceed with that noncompliance procedure. Gran Tierra also believes that the evidence shows that the Costayaco and Moqueta fields are two clearly separate and independent hydrocarbon accumulations. Therefore, it is Gran Tierra’s view that, pursuant to the terms of the Chaza Contract, the HPR royalty is only to be paid with respect to production from the Moqueta Exploitation Area when the accumulated oil production from that Exploitation Area exceeds five MMbbl. Discussions with the ANH have not resolved this issue and Gran Tierra has initiated the dispute resolution process under the Chaza Contract and filed an arbitration claim seeking a decision that the HPR royalty is not payable until production from the Moqueta Exploitation Area exceeds five MMbbl. The ANH filed a response to the claim seeking a declaration that its interpretation is correct and a

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counterclaim seeking, amongst other remedies, declarations that Gran Tierra breached the Chaza Contract by not paying the disputed HPR royalty, that the amount of the alleged HPR royalty that is payable, and that the Chaza Contract be terminated. Gran Tierra filed a response to the ANH's counterclaim and filed its comments on the ANH's responses to Gran Tierra's claim. The ANH filed an amended counterclaim and Gran Tierra filed a response to the ANH's amended counterclaim. As at September 30, 2014, total cumulative production from the Moqueta Exploitation Area was 3.7 MMbbl. The estimated compensation which would be payable on cumulative production to that date if the ANH is successful in the arbitration is $59.7 million. At this time no amount has been accrued in the interim unaudited condensed consolidated financial statements nor deducted from the Company's reserves for the disputed HPR royalty as Gran Tierra does not consider it probable that a loss will be incurred.

Additionally, the ANH and Gran Tierra are engaged in discussions regarding the interpretation of whether certain transportation and related costs are eligible to be deducted in the calculation of the HPR royalty. Discussions with the ANH are ongoing. Based on the Company's understanding of the ANH's position, the estimated compensation which would be payable if the ANH’s interpretation is correct could be up to $38.9 million as at September 30, 2014. At this time no amount has been accrued in the financial statements as Gran Tierra does not consider it probable that a loss will be incurred.

The Company provided the purchaser of its Argentina business unit with certain indemnifications. The Company remains responsible for certain contingent liabilities related to such indemnifications, subject to defined limitations. The Company does not believe that these obligations are probable of having a material impact on its consolidated financial position, results of operations or cash flows.

In addition to the above, Gran Tierra has several other lawsuits and claims pending. Although the outcome of these other lawsuits and disputes cannot be predicted with certainty, Gran Tierra believes the resolution of these matters would not have a material adverse effect on the Company’s consolidated financial position, results of operations or cash flows. Gran Tierra records costs as they are incurred or become probable and determinable.

Letters of credit

At September 30, 2014, the Company had provided promissory notes totaling $73.6 million (December 31, 2013 - $52.5 million) as security for letters of credit relating to work commitment guarantees contained in exploration contracts and other capital or operating requirements.

10. Financial Instruments, Fair Value Measurement, Credit Risk and Foreign Exchange Risk

Financial Instruments

At September 30, 2014, the Company’s financial instruments recognized in the balance sheet consist of cash and cash equivalents, restricted cash, accounts receivable, trading securities, accounts payable, accrued liabilities, foreign currency derivatives included in current assets and liabilities and contingent consideration and contingent liability included in other long-term liabilities.

Fair Value Measurement

The fair value of the trading securities, foreign currency derivatives, contingent consideration and contingent liability are being remeasured at the estimated fair value at each reporting period.

The fair value of the trading securities which were received as consideration on the sale of the Company's Argentina business unit (Note 3) was estimated based on quoted market prices in an active market.

The fair value of foreign currency derivatives was based on the estimated maturity value of foreign exchange non-deliverable forward contracts using applicable forward exchange rates. The most significant variable to the cash flow calculations is the estimation of forward foreign exchange rates. The resulting future cash inflows or outflows at maturity of the contracts are the net value of the contract.

The fair value of the contingent consideration, which relates to the acquisition of the remaining 30% working interest in certain properties in Brazil, was estimated based on the consideration expected to be transferred and discounted back to present value by applying an appropriate discount rate that reflected the risk factors associated with the payment streams. The discount rate used is determined in accordance with accepted valuation methods.

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The fair value of the contingent liability which relates to a dispute with Ecopetrol (Note 9) was estimated based on the fair value of the amount awarded using market oil prices in Colombia.

The fair value of the trading securities, foreign currency derivative assets and liabilities, contingent consideration and the contingent liability related to the Ecopetrol dispute at September 30, 2014, and December 31, 2013, were as follows:

	As at
(Thousands of U.S. Dollars)	September 30, 2014		December 31, 2013
Trading securities (Note 3)	$	11,711	$	—
Foreign currency derivative asset	414		—
	$	12,125	—
Foreign currency derivative liability	$	652	$	—
Contingent consideration liability	1,061		1,061
Contingent liability (Note 9)	4,400		4,400
	$	6,113	$	5,461

The following table presents gains or losses on financial instruments recognized in the accompanying interim unaudited condensed consolidated statements of operations:

(Thousands of U.S. Dollars)	Three Months Ended September 30,				Nine Months Ended September 30,
	2014		2013		2014			2013
Trading securities loss	$	2,540	$	—	$	2,201		$	—
Foreign currency derivatives loss (gain)	250		—		(4,424		)	—
	$	2,790	$	—	$	(2,223	)	$	—

These losses and gains are presented as financial instruments loss or gain in the interim unaudited condensed consolidated statements of operations and cash flows.

The fair value of long-term restricted cash approximates its carrying value because interest rates are variable and reflective of market rates. The fair values of other financial instruments approximate their carrying amounts due to the short-term maturity of these instruments.

GAAP establishes a fair value hierarchy that prioritizes the inputs to valuation techniques used to measure fair value. This hierarchy consists of three broad levels. Level 1 inputs consist of quoted prices (unadjusted) in active markets for identical assets and liabilities and have the highest priority. Level 2 and 3 inputs are based on significant other observable inputs and significant unobservable inputs, respectively, and have lower priorities. The Company uses appropriate valuation techniques based on the available inputs to measure the fair values of assets and liabilities.

At September 30, 2014, the fair value of the trading securities acquired in connection with the disposal of the Argentina business unit (Note 3) was determined using Level 1 inputs. At September 30, 2014, the fair value of the foreign currency derivatives was determined using Level 2 inputs. At September 30, 2014, and December 31, 2013, the fair value of the contingent consideration payable in connection with the Brazil acquisition was determined using Level 3 inputs and the fair value of the contingent liability which relates to a dispute with Ecopetrol (Note 9) was determined using Level 1 inputs. The disclosure in the paragraph above regarding the fair value of cash and restricted cash is based on Level 1 inputs.

The Company’s non-recurring fair value measurements include asset retirement obligations. The fair value of an asset retirement obligation is measured by reference to the expected future cash outflows required to satisfy the retirement obligation discounted at the Company’s credit-adjusted risk-free interest rate. The significant level 3 inputs used to calculate such liabilities include estimates of costs to be incurred, the Company’s credit-adjusted risk-free interest rate, inflation rates and estimated dates of abandonment. Accretion expense is recognized over time as the discounted liabilities are accreted to their expected settlement value, while the asset retirement cost is amortized over the estimated productive life of the related assets.

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Credit Risk

Credit risk arises from the potential that the Company may incur a loss if a counterparty to a financial instrument fails to meet its obligation in accordance with agreed terms. The Company’s financial instruments that are exposed to concentrations of credit risk consist primarily of cash, accounts receivables and foreign currency derivatives. The carrying value of cash, accounts receivable and foreign currency derivatives reflects management’s assessment of credit risk.

At September 30, 2014, cash and cash equivalents and restricted cash included balances in savings and checking accounts, as well as term deposits and certificates of deposit, placed primarily with financial institutions with strong investment grade ratings or governments, or the equivalent in the Company’s operating areas.

The Company purchases non-deliverable forward contracts for purposes of fixing exchange rates at which it will purchase or sell Colombian pesos to settle its income tax installment payments. With the exception of these foreign currency derivatives, any foreign currency transactions are conducted on a spot basis with major financial institutions in the Company’s operating areas.

At September 30, 2014, the Company had the following open foreign currency derivative positions:

Forward contracts
Currency	Contract Type	Notional (Millions of Colombian Pesos)	Weighted Average Fixed Rate Received (Colombian Pesos - U.S. Dollars)	Expiration
Colombian pesos	Buy	15,811.9	1,885	February 2015
Colombian pesos	Sell	10,275.3	1,895	February 2015

For the nine months ended September 30, 2014, 95% (nine months ended September 30, 2013 - 96%) of the Company's revenue and other income from continuing operations was generated in Colombia.

Foreign Exchange Risk

Unrealized foreign exchange gains and losses primarily result from fluctuation of the U.S. dollar to the Colombian peso due to Gran Tierra’s current and deferred tax liabilities, which are monetary liabilities mainly denominated in the local currency of the Colombian operations. As a result, foreign exchange gains and losses must be calculated on conversion to the U.S. dollar functional currency. A strengthening in the Colombian peso against the U.S. dollar results in foreign exchange losses, estimated at $80,000 for each one peso decrease in the exchange rate of the Colombian peso to one U.S. dollar.

In Colombia, the company receives 100% of its revenues in U.S. dollars and the majority of its capital expenditures are in U.S. dollars or are based on U.S. dollar prices. In Brazil, prices for oil are in U.S. dollars, but revenues are received in local currency translated according to current exchange rates. The majority of the Company's capital expenditures within Brazil are based on U.S. dollar prices, but are paid in local currency translated according to current exchange rates. In Peru, capital expenditures are based on U.S. dollar prices and may be paid in local currency or U.S. dollars.

Item 2. Management’s Discussion and Analysis of Financial Condition and Results of Operations

This report, and in particular this Management’s Discussion and Analysis of Financial Condition and Results of Operations, contains forward-looking statements within the meaning of Section 27A of the Securities Act of 1933 and Section 21E of the Securities Exchange Act of 1934. Please see the cautionary language at the very beginning of this Quarterly Report on Form 10-Q regarding the identification of and risks relating to forward-looking statements, as well as Part II, Item 1A “Risk Factors” in this Quarterly Report on Form 10-Q.

The following discussion of our financial condition and results of operations should be read in conjunction with the "Financial Statements" as set out in Part I, Item 1 of this Quarterly Report on Form 10-Q as well as the "Financial Statements and Supplementary Data" and "Management’s Discussion and Analysis of Financial Condition and Results of Operations" included in Part II, Items 8 and 7, respectively, of our Annual Report on Form 10-K, filed with the U.S. Securities and Exchange Commission (“SEC”) on February 26, 2014.

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Overview

We are an independent international energy company incorporated in the United States and engaged in oil and natural gas acquisition, exploration, development and production. Our operations are carried out in South America with business units in Colombia, Peru and Brazil, and we are headquartered in Calgary, Alberta, Canada. For the nine months ended September 30, 2014, 95% (nine months ended September 30, 2013 - 96%) of our revenue and other income from continuing operations was generated in Colombia.

On June 25, 2014, we sold our Argentina business unit to Madalena Energy Inc. ("Madalena") for aggregate consideration of $69.3 million, comprising $55.4 million in cash and $13.9 million in Madalena shares. The decision to sell our Argentina business unit followed recent significant exploration success in Peru, ongoing success in Colombia and ongoing evaluations in Brazil and was due to a decision to focus our human and capital resources in areas that we believe will provide the greatest return for our shareholders and drive growth in the future. In accordance with generally accepted accounting principles in the United States of America, we met the criteria to classify our Argentina business unit as discontinued operations in the second quarter of 2014. As such, the results of operations for our Argentina business unit are reflected as loss from discontinued operations, net of income taxes and discussed further in Note 3, "Discontinued Operations," of our interim unaudited condensed consolidated financial statements for the three and nine months ended September 30, 2014.

In this Management’s Discussion and Analysis of Financial Condition and Results of Operations, unless otherwise stated production represents production volumes NAR adjusted for inventory changes and losses.

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Highlights

	Three Months Ended September 30,							Nine Months Ended September 30,
	2014		2013			% Change		2014			2013			% Change
Production (BOEPD) (1)(2)	20,641		19,269			7		18,980			19,476			(3	)
Prices Realized - per BOE (1)	$	85.05	$	96.36		(12	)	$	88.88		$	95.41		(7	)
Revenue and Other Income ($000s) (1)	$	162,289	$	171,344		(5	)	$	462,670		$	508,505		(9	)
Income from Continuing Operations ($000s) (1)	$	44,184	$	40,213		10		$	125,440		$	149,797		(16	)
Loss from Discontinued Operations, Net of Income Taxes ($000s)	$	—	$	(7,156	)	—		$	(26,990	)	$	(11,044	)	144
Net Income ($000s)	$	44,184	$	33,057		34		$	98,450		$	138,753		(29	)
Income (Loss) Per Share - Basic
Income from Continuing Operations (1)	$	0.15	$	0.15		—		$	0.44		$	0.53		(17	)
Loss from Discontinued Operations, Net of Income Taxes	—		(0.03		)	—		(0.09		)	(0.04		)	125
Net income	$	0.15	$	0.12		25		$	0.35		$	0.49		(29	)
Income (Loss) Per Share - Diluted
Income from Continuing Operations (1)	$	0.15	$	0.15		—		$	0.44		$	0.53		(17	)
Loss from Discontinued Operations, Net of Income Taxes	—		(0.03		)	—		(0.09		)	(0.04		)	125
Net income	$	0.15	$	0.12		25		$	0.35		$	0.49		(29	)
Funds Flow from Continuing Operations ($000s) (1)(3)	$	89,229	$	84,060		6		$	261,043		$	272,409		(4	)
Capital Expenditures for Continuing Operations ($000s) (1)	$	95,419	$	28,460		235		$	268,859		$	191,218		41

	As at
	September 30, 2014		December 31, 2013		% Change
Cash & Cash Equivalents ($000s)	$	360,430	$	428,800	(16	)
Working Capital (including Cash & Cash Equivalents) ($000s)	$	329,146	$	245,827	34
Property, Plant & Equipment ($000s)	$	1,294,283	$	1,260,172	3

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(1) Excludes amounts relating to discontinued operations. Oil and gas production, NAR and adjusted for inventory changes, associated with discontinued operations was nil BOEPD and 1,819 BOEPD for the three and nine months ended September 30, 2014, and 2,710 BOEPD and 3,029 BOEPD for the corresponding periods in 2013. Argentina production for the three and nine months ended September 30, 2014, was calculated to the date of sale of June 25, 2014.

(2) Production represents production volumes NAR adjusted for inventory changes.

(3) Funds flow from continuing operations is a non-GAAP measure which does not have any standardized meaning prescribed under generally accepted accounting principles in the United States of America (“GAAP”). Management uses this financial measure to analyze operating performance and income generated by our principal business activities prior to the consideration of how non-cash items affect that income, and believes that this financial measure is also useful supplemental information for investors to analyze operating performance and our financial results. Investors should be cautioned that this measure should not be construed as an alternative to net income or other measures of financial performance as determined in accordance with GAAP. Our method of calculating this measure may differ from other companies and, accordingly, it may not be comparable to similar measures used by other companies. Funds flow from continuing operations, as presented, is net income adjusted for loss from discontinued operations, net of income taxes, depletion, depreciation, accretion and impairment (“DD&A”) expenses, deferred tax expense or recovery, non-cash stock-based compensation, unrealized foreign exchange gain or loss, unrealized financial instruments gain or loss, equity tax, cash settlement of asset retirement obligation and other loss. A reconciliation from net income to funds flow from continuing operations is as follows:

	Three Months Ended September 30,						Nine Months Ended September 30,
Funds Flow From Continuing Operations - Non-GAAP Measure ($000s)	2014			2013			2014			2013
Net income	$	44,184		$	33,057		$	98,450		$	138,753
Adjustments to reconcile net income to funds flow from continuing operations
Loss from discontinued operations, net of income taxes	—			7,156			26,990			11,044
DD&A expenses	53,936			51,269			140,137			157,323
Deferred tax expense (recovery)	2,272			(7,779		)	1,431			(23,494		)
Non-cash stock-based compensation	1,717			1,395			4,341			5,505
Unrealized foreign exchange (gain) loss	(13,818		)	1,516			(9,251		)	(16,850		)
Unrealized financial instruments loss	2,790			—			2,439			—
Equity tax	(1,641		)	(1,627		)	(3,283		)	(3,345		)
Cash settlement of asset retirement obligation	(211		)	(927		)	(211		)	(927		)
Other loss	—			—			—			4,400
Funds flow from continuing operations	$	89,229		$	84,060		$	261,043		$	272,409

• Oil and gas production NAR before inventory adjustments and losses was 19,297 BOEPD and 19,395 BOEPD for the three and nine months ended September 30, 2014, compared with 19,676 BOEPD and 19,230 BOEPD in the corresponding periods in 2013, respectively. In 2014, production from new wells in the Moqueta field in the Chaza Block and a new well in the Llanos-22 Block had a positive effect on production NAR before inventory adjustments and losses in Colombia, which was more than offset by the impact of well downtime for workovers and a water cut increase on the Costayaco field in the Chaza Block.

• Oil and gas production, NAR and adjusted for inventory changes and losses, increased by 7% to 20,641 BOEPD and decreased by 3% to 18,980 BOEPD for the three and nine months ended September 30, 2014, compared with the corresponding periods in 2013, respectively. During the three and nine months ended September 30, 2014, a net inventory reduction accounted for 0.1 MMbbl or 1,344 bopd of increased production and a net inventory increase accounted for 0.1 MMbbl or 415 bopd of reduced production, respectively. During the three months ended September 30, 2013, an oil inventory and losses ("oil inventory") increase accounted for 37,434 barrels or 407 bopd of reduced production and a net inventory reduction in the nine months ended September 30, 2013 accounted for 0.1 MMbbl or 246 bopd of increased production. In the three and nine months ended September 30, 2014, production was 85% and 83% from the Chaza Block in Colombia, respectively.

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• For the three and nine months ended September 30, 2014, revenue and other income decreased by 5% to $162.3 million and by 9% to $462.7 million compared with $171.3 million and $508.5 million in the corresponding periods in 2013, respectively. The decrease was primarily due to the effect of lower realized prices in both periods, partially offset by increased production in the three months ended September 30, 2014. The average price realized per BOE decreased by 12% to $85.05 and decreased by 7% to $88.88 for the three and nine months ended September 30, 2014, from $96.36 and $95.41, in the comparable periods in 2013, respectively.

• Income from continuing operations was $44.2 million, or $0.15 per share basic and diluted, and $125.4 million, or $0.44 per share basic and diluted, for the three and nine months ended September 30, 2014, respectively, compared with $40.2 million, or $0.15 per share basic and diluted, and $149.8 million, or $0.53 per share basic and diluted, in the corresponding periods in 2013, respectively. For the three months ended September 30, 2014, decreased oil and natural gas sales as a result of lower realized oil prices, and higher operating, DD&A, general and administrative ("G&A") expenses and financial instruments losses were more than offset by increased foreign exchange gains and lower income tax expenses. For the nine months ended September 30, 2014, decreased oil and natural gas sales, increased G&A expenses and lower foreign exchange gains were only partially offset by lower DD&A and income tax expenses, financial instruments gains and the absence of other loss.

• Loss from discontinued operations, net of income taxes, was $nil, or $0.00 per share basic and diluted, and $27.0 million, or $0.09 per share basic and diluted, for the three and nine months ended September 30, 2014, respectively, compared with a loss of $7.2 million, or $0.03 per share basic and diluted, and $11.0 million, or $0.04 per share basic and diluted, in the corresponding periods in 2013, respectively. For the nine months ended September 30, 2014, loss from discontinued operations, net of tax, included loss on disposal of the Argentina business unit of $19.3 million.

• Net income was $44.2 million, or $0.15 per share basic and diluted, and $98.5 million, or $0.35 per share basic and diluted, for the three and nine months ended September 30, 2014, respectively, compared with $33.1 million, or $0.12 per share basic and diluted, and $138.8 million, or $0.49 per share basic and diluted, in the corresponding periods in 2013, respectively. For the three months ended September 30, 2014, the increase was due to the absence of loss from discontinued operations, net of income taxes, and higher income from continuing operations. For the nine months ended September 30, 2014, the decrease was due to the recognition of a loss on sale of the Argentina business unit and lower income from continuing operations.

• For the three and nine months ended September 30, 2014, funds flow from continuing operations increased by 6% to $89.2 million and decreased by 4% to $261.0 million, respectively. For the three months ended September 30, 2014, decreased oil and natural gas sales as a result of lower oil realized prices, higher operating and G&A expenses and realized foreign exchange losses were offset by lower income tax expenses. For the nine months ended September 30, 2014, decreased oil and natural gas sales, increased G&A expenses and realized foreign exchange losses were only partially offset by lower income tax expenses and financial instruments gains.

• Cash and cash equivalents were $360.4 million at September 30, 2014, compared with $428.8 million at December 31, 2013. The decrease in cash and cash equivalents during the nine months ended September 30, 2014, was primarily the result of cash capital expenditures of $250.6 million, cash used in investing activities of discontinued operations of $12.4 million, cash used in operating activities of discontinued operations of $4.8 million, a $116.4 million change in assets and liabilities from operating activities of continuing operations, partially offset by funds flow from continuing operations of $261.0 million, net proceeds from sale of Argentina business unit of $42.8 million, and proceeds from the issuance of shares of common stock of $11.2 million.

• Working capital (including cash and cash equivalents) was $329.1 million at September 30, 2014, an $83.3 millionincrease from December 31, 2013.

• Property, plant and equipment ("PPE") at September 30, 2014, was $1.3 billion, an increase of $34.1 million from December 31, 2013, as a result of $268.9 million of capital expenditures related to continuing operations and $18.7 million of capital expenditures related to discontinued operations, partially offset by the sale of the Argentina business unit PPE of $100.2 million, $140.4 million of depletion, depreciation and impairment expenses related to continuing operations, and $12.9 million of depletion, depreciation and impairment expenses recorded in loss from discontinued operations.

• Capital expenditures for continuing operations for the nine months ended September 30, 2014, were $268.9 million compared with $191.2 million for the nine months ended September 30, 2013. In 2014, these capital expenditures

29

included drilling of $169.2 million, geological and geophysical (“G&G”) expenditures of $48.4 million, facilities of $23.3 million and other expenditures of $28.0 million.

Business Environment Outlook

Our revenues are significantly affected by pipeline and other oil transportation disruptions in Colombia and the continuing fluctuations in oil prices. Oil prices are volatile and unpredictable and are influenced by concerns about financial markets and the impact of the worldwide economy on oil supply and demand.

We believe our current operations and 2014 capital expenditure program can be funded from cash flow from existing operations and cash on hand. Should our operating cash flow decline due to unforeseen events, including additional pipeline delivery restrictions and other oil transportation disruptions in Colombia or a downturn in oil and gas prices, we would examine measures such as capital expenditure program reductions, use of our revolving credit facility, issuance of debt, disposition of assets, or issuance of equity. Continuing global social, political and economic uncertainty in the Middle East, United States, Europe and Asia and changes in global demand, supply and infrastructure are having an impact on world markets, and we are unable to determine the impact, if any, these events may have on oil prices and demand. The timing and execution of our capital expenditure program are also affected by the availability of services from third party oil field contractors and our ability to obtain, sustain or renew necessary government licenses and permits on a timely basis to conduct exploration and development activities. Any delay may affect our ability to execute our capital expenditure program.

We have noted recently that in the Department of Putumayo in Colombia where we operate, additional efforts are being made by new ethnic groups to utilize the courts to require that they be consulted, and obtain benefits, despite a company's prior compliance with the legislated consultation process and the receipt of the necessary permits to drill and operate. See "Risk Factors: Our Business is Subject to Local Legal, Political and Economic Factors Which Are Beyond Our Control, Which Could Impair Our Ability to Expand Our Operations or Operate Profitably."

Our future growth and acquisitions may depend on our ability to raise additional funds through equity and debt markets. Should we be required to raise debt or equity financing to fund capital expenditures or other acquisition and development opportunities, such funding may be affected by the market value of shares of our Common Stock. Also, raising funds by issuing shares or other equity securities would further dilute our existing shareholders, and this dilution would be exacerbated by a decline in our share price. Any securities we issue may have rights, preferences and privileges that are senior to our existing equity securities. Borrowing money may also involve further pledging of some or all of our assets, may require compliance with debt covenants and will expose us to interest rate risk. Depending on the currency used to borrow money, we may also be exposed to further foreign exchange risk. Our ability to borrow money and the interest rate we pay for any money we borrow will be affected by market conditions, and we cannot predict what price we may pay for any borrowed money.

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Consolidated Results of Operations

	Three Months Ended September 30,								Nine Months Ended September 30,
	2014			2013			% Change		2014			2013			% Change
(Thousands of U.S. Dollars)
Oil and natural gas sales (1)	$	161,517		$	170,825		(5	)	$	460,510		$	507,315		(9	)
Interest income (1)	772			519			49		2,160			1,190			82
	162,289			171,344			(5	)	462,670			508,505			(9	)
Operating expenses (1)	33,949			25,069			35		81,161			81,082			—
DD&A expenses (1)	53,936			51,269			5		140,137			157,323			(11	)
G&A expenses (1)	13,350			11,768			13		40,145			29,880			34
Foreign exchange (gain) loss (1)	(12,438		)	430			—		(6,604		)	(18,549		)	64
Financial instruments loss (gain) (1)	2,790			—			—		(2,223		)	—			—
Other loss (1)	—			—			—		—			4,400			(100	)
	91,587			88,536			3		252,616			254,136			(1	)
Income from continuing operations before income taxes (1)	70,702			82,808			(15	)	210,054			254,369			(17	)
Income tax expense (1)	(26,518		)	(42,595		)	(38	)	(84,614		)	(104,572		)	(19	)
Income from continuing operations (1)	$	44,184		$	40,213		10		$	125,440		$	149,797		(16	)
Loss from discontinued operations, net of income taxes	—			(7,156		)	(100	)	(26,990		)	(11,044		)	144
Net income	$	44,184		$	33,057		34		$	98,450		$	138,753		(29	)
Production (1)(2)
Oil and NGL's, bbl	1,888,626			1,766,117			7		5,138,675			5,308,791			(3	)
Natural gas, Mcf	62,077			39,648			57		256,567			50,116			412
Total production, BOE	1,898,972			1,772,725			7		5,181,436			5,317,144			(3	)
Average Prices (1)
Oil and NGL's per bbl	$	85.40		$	96.69		(12	)	$	89.41		$	95.55		(6	)
Natural gas per Mcf	$	4.51		$	2.88		57		$	4.72		$	3.78		25
Consolidated Results of Operations per BOE
Oil and natural gas sales (1)	$	85.05		$	96.36		(12	)	$	88.88		$	95.41		(7	)
Interest income (1)	0.41			0.29			41		0.42			0.22			91
	85.46			96.65			(12	)	89.30			95.63			(7	)
Operating expenses (1)	17.88			14.14			26		15.66			15.25			3
DD&A expenses (1)	28.40			28.92			(2	)	27.05			29.59			(9	)
G&A expenses (1)	7.03			6.64			6		7.75			5.62			38
Foreign exchange (gain) loss (1)	(6.55		)	0.24			—		(1.27		)	(3.49		)	64
Financial instruments loss (gain) (1)	1.47			—			—		(0.43		)	—			—
Other loss (1)	—			—			—		—			0.83			(100	)
	48.23			49.94			(3	)	48.76			47.80			2
Income from continuing operations before income taxes (1)	37.23			46.71			(20	)	40.54			47.83			(15	)
Income tax expense (1)	(13.96		)	(24.03		)	(42	)	(16.33		)	(19.67		)	(17	)
Income from continuing operations (1)	$	23.27		$	22.68		3		$	24.21		$	28.16		(14	)

(1) Excludes amounts relating to discontinued operations. Oil and gas production, NAR and adjusted for inventory changes, associated with discontinued operations was nil BOEPD and 1,819 BOEPD for the three and nine months ended September 30,

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2014, and 2,710 BOEPD and 3,029 BOEPD for the corresponding periods in 2013. Argentina production for the three and nine months ended September 30, 2014, was calculated to the date of sale of June 25, 2014.

(2) Production represents production volumes NAR adjusted for inventory changes and losses.

Net income for the three and nine months ended September 30, 2014, was $44.2 million and $98.5 million, respectively, compared with $33.1 million and $138.8 million in the comparable periods in 2013. On a per share basis, net income increased to $0.15 per share basic and diluted for the three months ended September 30, 2014, from $0.12 per share basic and diluted in the corresponding period in 2013. For the nine months ended September 30, 2014, net income decreased to $0.35 per share basic and diluted from $0.49 per share basic and diluted in the corresponding period in 2013. For the three months ended September 30, 2014, the increase was due to the absence of loss from discontinued operations, net of income taxes, and higher income from continuing operations. For the nine months ended September 30, 2014, the decrease was due to higher loss from discontinued operations, net of income taxes, and lower income from continuing operations.

Income from continuing operations was $44.2 million, or $0.15 per share basic and diluted, and $125.4 million, or $0.44 per share basic and diluted, for the three and nine months ended September 30, 2014, respectively, compared with $40.2 million, or $0.15 per share basic and diluted, and $149.8 million, or $0.53 per share basic and diluted, in the corresponding periods in 2013, respectively. For the three months ended September 30, 2014, decreased oil and natural gas sales as a result of lower realized oil prices, and higher operating, DD&A and G&A expenses and financial instruments losses, were offset by foreign exchange gains and lower income tax expenses. For the nine months ended September 30, 2014, decreased oil and natural gas sales, increased G&A expenses and lower foreign exchange gains were only partially offset by lower DD&A and income tax expenses, financial instruments gains and the absence of other loss.

Loss from discontinued operations, net of income taxes, was $nil, and $27.0 million, or $0.09 per share basic and diluted, for the three and nine months ended September 30, 2014, respectively, compared with $7.2 million, or $0.03 per share basic and diluted, and $11.0 million, or $0.04 per share basic and diluted, in the corresponding periods in 2013, respectively. For the nine months ended September 30, 2014, loss from discontinued operations, net of tax, included loss on disposal of the Argentina business unit of $19.3 million.

Oil and NGL production NAR before inventory adjustments and losses for the three and nine months ended September 30, 2014, decreased to 19,185 and increased to 19,238 bopd compared with 19,609 and 19,202 bopd in the corresponding periods in 2013, respectively. In 2014, production from new wells in the Moqueta field in the Chaza Block and a new well in the Llanos-22 Block and fewer days of pipeline disruptions had a positive effect on production NAR before inventory adjustments and losses in Colombia, which was more than offset by the impact of well downtime for workovers and a water cut increase on the Costayaco field in the Chaza Block.

Oil and NGL production NAR after inventory adjustments and losses for the three and nine months ended September 30, 2014, increased by 7% to 20,529 bopd and decreased by 3% to 18,823 bopd compared with the corresponding periods in 2013, respectively. During the three months ended September 30, 2014, an oil inventory reduction accounted for 0.1 MMbbl or 1,344 bopd of increased production compared with an oil inventory increase which accounted for 37,434 barrels or 407 bopd reduced production in the corresponding period in 2013. The oil inventory reduction in three months ended September 30, 2014, was due to reduced oil inventory related to sales to a customer in Colombia with a protracted sales cycle whereby the transfer of ownership occurred upon export. During the nine months ended September 30, 2014, an oil inventory increase accounted for 0.1 MMbbl or 415 bopd of reduced production compared with an oil inventory reduction in 2013 which accounted for 0.1 MMbbl or 246 bopd increased production. In the three and nine months ended September 30, 2014 and 2013, the impact of Ecopetrol S.A. ("Ecopetrol") operated Trans-Andean oil pipeline (the "OTA pipeline”) disruptions on production was partially mitigated by selling a portion of our oil through trucking and use of alternative pipelines.

Average realized oil pricesdecreased by 12% to $85.40 per bbl for the three months ended September 30, 2014, from $96.69 per bbl in the comparable period in 2013 and decreased by 6% to $89.41 per bbl for the nine months ended September 30, 2014, from $95.55 per bbl in the comparable period in 2013,primarily due to decreases in the benchmark prices during the three month period. Average Brent oil prices for the three and nine months ended September 30, 2014, were $101.82 and $106.56 per bbl, respectively, compared with $110.27 and $108.45 per bbl in the corresponding periods in 2013. Average WTI oil prices for the three and nine months ended September 30, 2014, were $97.17 and $99.61 per bbl, respectively, compared with $105.80 and $98.14 per bbl in the corresponding periods in 2013.

During the third quarter of 2014, we commenced sales to additional alternative customers during periods of OTA pipeline disruptions. These sales have varying affects on our realized prices and transportation costs. During the three and nine months

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ended September 30, 2014, 62% and 52% of our oil and gas volumes sold in Colombia, respectively, were to alternative customers, as compared with 38% and 39% during the corresponding periods in 2013. Beginning July 1, 2014, the port operations fee component of the OTA pipeline pricing structure increased by $2.94 per bbl resulting in a reduction of realized oil prices by this amount on sales delivered through the OTA pipeline.

Revenue and other income for the three months ended September 30, 2014, decreased to $162.3 million from $171.3 million in the comparable period in 2013 as a result of decreased realized oil prices, partially offset by increased production. Revenue and other income for the nine months ended September 30, 2014, decreased to $462.7 million from $508.5 million in the comparable period in 2013 primarily due to lower realized prices.

Operating expensesincreased by 35% to $33.9 million and remained consistent at $81.2 million for the three and nine months ended September 30, 2014, respectively, compared with the corresponding periods in 2013. For the three months ended September 30, 2014, the increase in operating expenses was primarily due to an increase in the operating cost per BOE and increased production. For the nine months ended September 30, 2014, an increase in the operating cost per BOE, was offset by decreased production.

On a per BOE basis, operating expenses increased by 26% to $17.88 and increased by 3% to $15.66 for the three and nine months ended September 30, 2014, respectively, from $14.14 and $15.25 in the comparable periods in 2013. The increase in operating expenses per BOE in 2014 was primarily due to higher pipeline and trucking costs due to sales to alternative customers with delivery points which carried high transportation costs. Operating expenses per BOE also increased in the three months ended September 30, 2014, as a result of increased workover expenses.

DD&A expenses for the three months ended September 30, 2014, increased to $53.9 million from $51.3 million in the comparable period in 2013, primarily due to increased production, partially offset by a decreased depletion rate. On a per BOE basis, the depletion rate decreased by 2% to $28.40 from $28.92 due to an increase in reserves combined with a decrease in costs in the depletable base relating to lower future development costs and the receipt of a termination payment in Brazil in the third quarter of 2013.

DD&A expenses for the nine months ended September 30, 2014, decreased to $140.1 million ($27.05 per BOE) from $157.3 million ($29.59 per BOE) in the comparable period in 2013, due to decreased production and a decreased depletion rate. DD&A expenses for the nine months ended September 30, 2013, included a $2.0 million ceiling test impairment loss in our Brazil cost center. On a per BOE basis, in addition to the 2013 impairment charge, the decrease was due to an increase in reserves, partially offset by an increase in costs in the depletable base.

G&A expenses for the three months ended September 30, 2014, increased by 13% to $13.4 million ($7.03 per BOE) from $11.8 million ($6.64 per BOE) compared with the corresponding period in 2013. The increase was mainly due to increased activity related to expanded operations in Peru, increased employee related costs and higher consulting expenses.

G&A expenses for the nine months ended September 30, 2014, increased by 34% to $40.1 million ($7.75 per BOE) from $29.9 million ($5.62 per BOE), the corresponding period in 2013. The increase was primarily associated with the increased activity for expanded operations in Peru, increased salaries expenses and higher stock-based compensation expense associated with restricted stock units ("RSUs") and stock options. These increases were partially offset by higher G&A allocations to capital projects within the business units.

For the three and nine months ended September 30, 2014, the foreign exchange gain was $12.4 million and $6.6 million, respectively. For the three months ended September 30, 2014, we had realized foreign exchange losses of $1.4 million and an unrealized non-cash foreign exchange gain of $13.8 million. For the nine months ended September 30, 2014, we had realized foreign exchange losses of $2.7 million and an unrealized non-cash foreign exchange gain of $9.3 million. Unrealized foreign exchange gains are primarily a result of a net monetary liability position in Colombia and the weakening of Colombian Peso versus U.S. dollar.

For the three months ended September 30, 2013, there was a foreign exchange loss of $0.4 million, comprising a $1.5 million unrealized non-cash foreign exchange loss and realized foreign exchange gains of $1.1 million. For the nine months ended September 30, 2013, there was a foreign exchange gain of $18.5 million, comprising a $16.9 million unrealized non-cash foreign exchange gain and realized foreign exchange gains of $1.6 million.

Financial instruments losswas$2.8 million in the three months ended September 30, 2014 consisting solely of unrealized losses. In the nine months ended September 30, 2014, we had a financial instrumentgain of $2.2 million, which comprised a realized financial instrument gain of $4.6 million and unrealized financial instruments losses of $2.4 million.

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Financial instrument loss in the three and nine months ended September 30, 2014, included a $2.5 million and $2.2 million, respectively, unrealized loss on the Madalena shares we received in connection with the sale of our Argentina business unit. Madalena is an independent, Canadian-based, domestic and international upstream oil and gas company whose main business activities include exploration, development and production of crude oil, natural gas liquids and natural gas. Madalena's shares are listed on the Canadian TSX Venture Exchange.

Financial instruments losses and gains in the three and nine months ended September 30, 2014, also included a $0.3 million loss and a $4.4 million gain, respectively, on our Colombian peso non-deliverable forward contracts. We purchased these contracts for purposes of fixing the exchange rate at which we will purchase or sell Colombian pesos to settle our income tax installment payments.

Other loss of $4.4 million in the nine months ended September 30, 2013, related to a contingent loss accrued in connection with a legal dispute in which we received an adverse legal judgment in the first quarter of 2013. We have filed an appeal against the judgment.

Income tax expense related to continuing operations was $26.5 million and $84.6 million for the three and nine months ended September 30, 2014, respectively, compared with $42.6 million and $104.6 million in the comparable periods in 2013. The decrease for the nine months ended September 30, 2014, was primarily due to lower taxable income in Colombia and lower taxes in Brazil. In the corresponding quarter in 2013 in Brazil, a net payment of $54.0 million from a third party in connection with the termination of a farm-in agreement resulted in a current tax liability of approximately $10.4 million. The effective tax rate was 40% in the nine months ended September 30, 2014, comparable with 41% in the same period in 2013.

For the nine months ended September 30, 2014, the differential between the effective tax rate of 40% and the 35% U.S. statutory rate was primarily attributable to a non-deductible third party royalty in Colombia, the impact of other local taxes, non-deductible stock-based compensation, and an increase in the valuation allowance, partially offset by the foreign currency translation adjustments and the foreign tax rate differential. The variance from the 35% U.S. statutory rate for 2013 was primarily attributable to a non-deductible third party royalty in Colombia, an increase in valuation allowance, non-deductible stock-based compensation and the impact of other local taxes, partially offset by a decrease in foreign currency translation adjustments, the foreign tax rate differential and other permanent adjustments.

2014 Work Program and Capital Expenditure Program

Our 2014 capital program has been reduced to $472 million from $482 million. This includes $248 million for Colombia, $175 million for Peru, $26 million for Brazil, $18 million for Argentina and $5 million associated with corporate activities. The decrease in our capital spending is primarily due to the deferral of three exploration wells in Colombia and a portion of seismic in Brazil to 2015. The capital spending program allocates $286 million for drilling; $65 million for facilities, pipelines and other; $116 million for G&G expenditures; and $5 million for corporate activities. Of the $286 million allocated to drilling, approximately 17% is for exploration and the balance is for appraisal and development drilling.

Our 2014 work program is intended to create both growth and value by developing existing assets to increase reserves and

production levels, the construction of pipelines and facilities in the areas with proved reserves, and maturing our exploration prospects through seismic acquisition and drilling. We expect to finance our 2014 capital program through cash flows from operations and cash on hand, while retaining financial flexibility to undertake further development opportunities and pursue acquisitions. However, as a result of the nature of the oil and natural gas exploration, development and exploitation industry, budgets are regularly reviewed with respect to both the success of expenditures and other opportunities that become available. Accordingly, while we currently intend that funds be expended as set forth in our 2014 work program, there may be circumstances where, for sound business reasons, actual expenditures may in fact differ.

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Segmented Results from Continuing Operations – Colombia

	Three Months Ended September 30,							Nine Months Ended September 30,
	2014			2013		% Change		2014			2013			% Change
(Thousands of U.S. Dollars)
Oil and natural gas sales	$	153,815		$	164,241	(6	)	$	438,100		$	488,577		(10	)
Interest income	98			111		(12	)	419			415			1
	153,913			164,352		(6	)	438,519			488,992			(10	)
Operating expenses	32,261			23,463		37		75,747			75,764			—
DD&A expenses	51,144			46,821		9		131,742			141,141			(7	)
G&A expenses	4,202			3,035		38		14,383			11,050			30
Foreign exchange (gain) loss	(15,202		)	1,818		(936	)	(8,679		)	(18,716		)	54
Financial instruments loss (gain)	250			—		—		(4,424		)	—			—
Other loss	—			—		—		—			4,400			(100	)
	72,655			75,137		(3	)	208,769			213,639			(2	)
Income from continuing operations before income taxes	$	81,258		$	89,215	(9	)	$	229,750		$	275,353		(17	)
Production (1)
Oil and NGL's, bbl	1,796,265			1,696,981		6		4,890,774			5,108,862			(4	)
Natural gas, Mcf	62,077			39,648		57		256,567			50,116			412
Total production, BOE	1,806,611			1,703,589		6		4,933,535			5,117,215			(4	)
Average Prices
Oil and NGL's per bbl	$	85.47		$	96.72	(12	)	$	89.33		$	95.60		(7	)
Natural gas per Mcf	$	4.51		$	2.88	57		$	4.72		$	3.78		25
Segmented Results of Operations per BOE
Oil and natural gas sales	$	85.14		$	96.41	(12	)	$	88.80		$	95.48		(7	)
Interest income	0.05			0.07		(29	)	0.08			0.08			—
	85.19			96.48		(12	)	88.88			95.56			(7	)
Operating expenses	17.86			13.77		30		15.35			14.81			4
DD&A expenses	28.31			27.48		3		26.70			27.58			(3	)
G&A expenses	2.33			1.78		31		2.92			2.16			35
Foreign exchange (gain) loss	(8.41		)	1.07		(886	)	(1.76		)	(3.66		)	52
Financial instruments loss (gain)	0.14			—		—		(0.90		)	—			—
Other loss	—			—		—		—			0.86			(100	)
	40.23			44.10		(9	)	42.31			41.75			1
Income from continuing operations before income taxes	$	44.96		$	52.38	(14	)	$	46.57		$	53.81		(13	)

(1) Production represents production volumes NAR adjusted for inventory changes and losses.

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For the three and nine months ended September 30, 2014, income from continuing operations before income taxes was $81.3 million and $229.8 million, respectively, compared with $89.2 million and $275.4 million in the comparable periods in 2013. For the three months ended September 30, 2014, the decrease was due to lower oil and natural gas sales primarily as a result of decreased realized oil prices and increased operating, DD&A and G&A expenses, partially offset by foreign exchange gains. For the nine months ended September 30, 2014, the decrease was due to lower oil and natural gas sales, higher G&A expenses and lower foreign exchange gains, partially offset by decreased DD&A expenses, financial instrument gains and the absence of other losses.

Oil and NGL production NAR before inventory adjustments and losses for the three and nine months ended September 30, 2014, decreased to 18,185 bopd and 18,321 bopd compared with 18,780 bopd and 18,384 bopd, respectively, in the corresponding periods in 2013. Production during the nine months ended September 30, 2014, reflected approximately 155 days of oil delivery restrictions in Colombia compared with 150 days of oil delivery restrictions in the comparable period in 2013. In 2014, production from new wells in the Moqueta field in the Chaza Block and a new well in the Llanos-22 Block had a positive effect on production NAR before inventory adjustments and losses, which was more than offset by the impact of well downtime for workovers and a water cut increase on the Costayaco field in the Chaza Block.

Oil and NGL production NAR after inventory adjustments and losses for the three and nine months ended September 30, 2014, increased to 1.8 MMbbl or 19,525 bopd and decreased to 4.9 MMbbl or 17,915 bopd compared with 1.7 MMbbl or 18,445 bopd and 5.1 MMbbl or 18,714 bopd, respectively, in the comparable periods in 2013. During the three and nine months ended September 30, 2014, an oil inventory decrease accounted for increased production of 0.1 MMbblor 1,340 bopd and an oil inventory increase accounted for reduced production of 0.1 MMbbl or 406 bopd, respectively. During the three months ended September 30, 2013, an oil inventory increase accounted for 30,771 barrels or 335 bopd reduced production and an oil inventory reduction accounted for 0.1 MMbbl or 330 bopd of increased production in the nine months ended September 30, 2013.

In the three months ended September 30, 2014, we liquidated inventory delivered in the prior quarter to a customer with a protracted sales cycle whereby the transfer of ownership does not occur until export, which resulted in decreased inventory. Oil inventory in the OTA pipeline and associated Ecopetrol owned facilities as well as our tanks in the Putumayo Basin decreased as a result of a reduced impact of pipeline disruptions. In the nine months ended September 30, 2014, our inventory increased due to the timing of revenue recognition for deliveries to another customer with a protracted sales cycle, and oil inventory in the OTA pipeline and associated Ecopetrol owned facilities as well as our tanks in the Putumayo Basin increased as a result of pipeline disruptions. The oil inventory reduction in the nine months ended September 30, 2013, was due to a decrease in oil inventory in the OTA pipeline and associated Ecopetrol owned facilities in the Putumayo Basin and reduced oil inventory related to sales to a another short-term customer in Colombia with a protracted sales cycle whereby the transfer of ownership occurred upon export.

Revenue and other income for the three and nine months ended September 30, 2014, decreased by 6% to $153.9 million and 10% to $438.5 million, respectively, from the comparable periods in 2013.

For the three months ended September 30, 2014, the average realized price per bbl for oil decreased by 12% to $85.47 compared with $96.72 in the corresponding period in 2013. For the nine months ended September 30, 2014, the average realized price per bbl for oil decreased by 7% to $89.33 compared with $95.60 in the corresponding period in 2013, primarily due to decreases in the benchmark prices during the three month period. Average Brent oil prices for the three and nine months ended September 30, 2014, were $101.82 and $106.56 per bbl, respectively, compared with $110.27 and $108.45 per bbl in the corresponding periods in 2013.

During the third quarter of 2014, we commenced sales to additional alternative customers during periods of OTA pipeline disruptions. These sales have varying affects on our realized prices and transportation costs. During the three and nine months ended September 30, 2014, 62% and 52% of our oil and gas volumes sold, respectively, were to alternative customers. The effect on the Colombian realized price for the three and nine months ended September 30, 2014, for sales to alternative customers was a reduction of approximately $3.07 and $7.31 per BOE, respectively, as compared with delivering all of our Colombian oil through the OTA pipeline. Sales to alternative customers during the corresponding periods in 2013 were 38% and 39%, respectively, of our oil and gas volumes sold in Colombia and the effect on the Colombian realized price was a reduction of approximately $7.61 and $8.47 per BOE, respectively. Sales to two of the alternative customers were made at the beginning of the three month period ended September 30, 2014 at the highest oil prices of the quarter, decreasing the downward pressure on realized prices that results from selling to alternative customers. Additionally, an increase in the Port of Tumaco tariff effective July 1, 2014, reduced our realized oil price by approximately $0.89 and $0.33 per bbl in the three and nine months ended September 30, 2014, respectively.

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Operating expensesincreased by 37% to $32.3 million for the three months ended September 30, 2014, and at $75.7 million for the nine months ended September 30, 2014, were consistent with the comparable period in 2013. For the three months ended September 30, 2014, the effect was due to higher production combined with an increase in operating costs per BOE, whereas for the nine months ended September 30, 2014, the effect of reduced production was offset by increased operating costs per BOE. On a per BOE basis, operating expenses increased by 30% to $17.86 for the three months ended September 30, 2014, and increased by 4% to $15.35 for the nine months ended September 30, 2014, from $13.77 and $14.81, respectively, in the comparable periods in 2013. In the three months ended September 30, 2014, operating expenses per BOE increased primarily due to higher pipeline and trucking costs due to sales to alternative customers with delivery points which carried high transportation costs. Additionally, in the three months ended September 30, 2014, workover expenses increased by $1.02 per BOE compared with the corresponding period in 2013. The estimated net effect of sales to alternative customers as compared with delivering all of our Colombian oil through the OTA pipeline on Colombian transportation costs for the three months ended September 30, 2014, was an increase of $0.28 per BOE compared with a saving of $2.02 per BOE in the corresponding period in 2013.

In the nine months ended September 30, 2014, operating expenses per BOE increased primarily due to higher transportation costs associated with sales to alternative customers with delivery points which carried high trucking and pipeline costs, partially offset by the effect of liquidated inventory volumes in the comparative period of 2013. The inventory volumes liquidated in the comparative nine months ended September 30, 2013, were primarily related to a delivery point which carried high transportation costs, and to which we did not deliver in the current period. The estimated net effect of sales to alternative customers on Colombian transportation costs for the nine months ended September 30, 2014, was a saving of $1.02 per BOE compared with a saving of $1.36 in the corresponding period in 2014.

DD&A expensesincreased by 9% to $51.1 million and decreased 7% to $131.7 million for the three and nine months ended September 30, 2014, respectively, from the comparable periods in 2013. In the three months ended September 30, 2014, the increase was primarily due to increased production. In the nine months ended September 30, 2014, the decrease was due to decreased production and a decrease in the per BOE depletion rate. On a per BOE basis, DD&A expenses in the three months ended September 30, 2014, increased by 3% to $28.31 due to increased costs in the depletable base being partially offset by an increase in reserves. For the nine months ended September 30, 2014, DD&A expenses decreased by 3% to $26.70 due to an increase in reserves, only partially offset by increased costs in the depletable base.

G&A expensesincreased by 38% to $4.2 million ($2.33 per BOE) from $3.0 million ($1.78 per BOE) and by 30% to $14.4 million ($2.92 per BOE) from $11.1 million ($2.16 per BOE) for the three and nine months ended September 30, 2014, respectively, from the comparable periods in 2013. The increases were primarily due to increased salaries expense due to salary increases and an increased headcount.

For the three months ended September 30, 2014, the foreign exchange gain was $15.2 million, which included a $14.5 million unrealized non-cash foreign exchange gain. In the three months ended September 30, 2013, we had a foreign exchange loss of $1.8 million, which included an $1.5 million unrealized non-cash foreign exchange loss. The Colombian Peso weakened by 8% and strengthened by 1% against the U.S. dollar in the three months ended September 30, 2014, and 2013, respectively. Under GAAP, deferred taxes are considered a monetary liability and require translation from local currency to U.S. dollar functional currency at each balance sheet date. This translation is the main source of the unrealized foreign exchange losses or gains.

For the nine months endedSeptember 30, 2014, the foreign exchange gain was $8.7 million, which included a $9.9 million unrealized non-cash foreign exchange gain. In the nine months ended September 30, 2013, the foreign exchange gain was $18.7 million, which included a $16.9 million unrealized non-cash foreign exchange gain. The Colombian Peso weakened by 5% and 8% against the U.S. dollar in the nine months ended September 30, 2014, and 2013, respectively.

Financial instruments lossof $0.3 million in the three months ended September 30, 2014, and $4.4 milliongain in the nine months ended September 30, 2014, related to gains and losses on our Colombian peso non-deliverable forward contracts, of which $nil and $4.6 million was realized during the three and nine months ended September 30, 2014. We purchased these contracts for purposes of fixing the exchange rate at which we purchase or sell Colombian pesos to settle our income tax installment payments.

Other loss of $4.4 million in the nine months ended September 30, 2013, related to a contingent loss accrued in connection with a legal dispute in which we received an adverse legal judgment within the quarter. We have filed an appeal against the judgment.

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Capital Program - Colombia

Capital expenditures in our Colombian segment during the three months ended September 30, 2014, were $50.8 million bringing total capital expenditures for the nine months ended September 30, 2014, to $147.0 million. During the second quarter of 2013, we received proceeds of $1.5 million from the sale of our 15% working interest in the Mecaya Block in Colombia. The following table provides a breakdown of capital expenditures in 2014 and 2013:

	Three Months Ended September 30,				Nine Months Ended September 30,
(Millions of U.S. Dollars)	2014		2013		2014		2013
Drilling and completions	$	28.6	$	22.9	$	84.9	$	62.6
G&G	10.4		8.6		30.3		25.2
Facilities and equipment	6.5		6.5		20.0		23.2
Other	5.3		1.6		11.8		9.3
	$	50.8	$	39.6	$	147.0	$	120.3

The significant elements of our third quarter 2014 capital program in Colombia were:

• On the Chaza Block (100% working interest ("WI"), operated), we drilled, completed and put on production the Moqueta-15 development well in the Moqueta field and, in the Costayaco field, drilled the Costayaco-19i development well and completed the Costayaco-21 development well. We also commenced civil works for the Eslabón Sur Shallow-1 and Eslabón Sur Deep-1 exploration wells, which are targeting the same Cretaceous Sandstones encountered in the Costayaco and Moqueta discoveries. We commenced drilling the Moqueta-14 development well in the Moqueta field, but drilling of this well was suspended. We also continued work to obtain the necessary environmental and social permits for future seismic programs on this block.

• We commenced the acquisition of 2-D seismic on the Sinu-1 Block (60% WI, operated) and continued work in preparation for a future seismic program on the Sinu-3 Block (51% WI, operated). We also completed the interpretation of 2-D seismic acquired on the Piedemonte Sur Block (100% WI, operated).

• We continued facilities work at the Costayaco and Moqueta fields on the Chaza Block.

During the third quarter 2014, we received the Exploitation License for the Moqueta field and were the successful bidder on the Putumayo-31 Block in the Putumayo Basin of Colombia in Colombia's National Hydrocarbon Agency ("ANH") 2014 Bid Round and the award with operatorship was subsequently approved by the ANH.

Outlook - Colombia

The 2014 capital program in Colombia is $248 million with $136 million allocated to drilling, $44 million to facilities and pipelines and $68 million for G&G expenditures.

Our planned work program for the remainder of 2014 in Colombia includes drilling one oil exploration well on the Chaza Block. We also plan to drill an additional two development wells on the Moqueta field and one development well on the Costayaco field of the Chaza Block.

We also plan to acquire 2-D seismic on the Guayuyaco (70% WI, operated), and Cauca-6 and 7 Blocks, and the Putumayo-10 Block (70% WI, operated), and to continue the acquisition of 2-D seismic on the Sinu-1 and Sinu-3 Blocks. Facilities work is also planned for the Chaza and Llanos-22 Blocks.

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Segmented Results from Continuing Operations – Peru

	Three Months Ended September 30,							Nine Months Ended September 30,
	2014			2013			% Change	2014			2013			% Change
(Thousands of U.S. Dollars)
Interest income	$	1		$	1		—	$	1		$	27		(96	)
DD&A expenses	109			73			49	420			272			54
G&A expenses	2,360			1,234			91	6,331			3,621			75
Foreign exchange loss	877			98			795	1,061			1,118			(5	)
	3,346			1,405			138	7,812			5,011			56
Loss from continuing operations before income taxes	$	(3,345	)	$	(1,404	)	138	$	(7,811	)	$	(4,984	)	57

For the three and nine months ended September 30, 2014, loss from continuing operations before income taxes in Peru was $3.3 million and $7.8 million, respectively, compared with $1.4 million and $5.0 million in the comparable periods in 2013. The increase in loss from continuing operations before income taxes was primarily due to an increase in G&A expenses. In the three and nine months ended September 30, 2014, the increase in G&A expenses was due to higher salaries expense as a result of an increased headcount and higher consulting fees due to expanded operations, partially offset by increased G&A allocations to capital projects.

Capital Program – Peru

Capital expenditures in the three months ended September 30, 2014, were $40.7 million bringing total capital expenditures for the nine months ended September 30, 2014, to $103.5 million. Capital expenditures in the three months ended September 30, 2014, consisted of drilling of $22.4 million, G&G expenditures of $10.5 million, facilities expenditures of $2.5 million and, asset retirement obligation and other asset expenditures of $5.3 million.

The significant elements of our third quarter 2014 capital program in Peru were:

• On Block 95 (100% WI, operated), we continued engineering, procurement and construction work in preparation for a long-term production test and drilling of the Bretaña Sur appraisal well and purchased long-lead items for future drilling activities on this field.

• On Block 107 (100% WI, operated), we commenced the acquisition of 2-D seismic and continued the refurbishment of a seismic camp. On Block 133 (100% WI, operated), we continued work to obtain the necessary environmental and social permits for future seismic programs.

Outlook - Peru

The 2014 capital program in Peru is $175 million with $121 million allocated to drilling, $16 million for facilities and $38 million for G&G expenditures.

Our planned work program for the remainder of 2014 includes drilling an appraisal well in the Bretaña field and the completion of crude oil processing and loading facilities in order to initiate a long-term production test in the fourth quarter of 2014. Additionally, we expect to complete the acquisition of 2-D seismic on Block 107, continue work to obtain the necessary environmental and social permits in anticipation of drilling our first exploration wells on Blocks 107, 123 and 129 in future years and continue work to obtain the necessary environmental and social permits for planned seismic programs on Blocks 133.

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Segmented Results from Continuing Operations – Brazil

	Three Months Ended September 30,							Nine Months Ended September 30,
	2014		2013			% Change		2014		2013			% Change
(Thousands of U.S. Dollars)
Oil sales	$	7,702	$	6,584		17		$	22,410	$	18,738		20
Interest income	433		281			54		1,292		292			342
	8,135		6,865			18		23,702		19,030			25
Operating expenses	1,688		1,606			5		5,414		5,318			2
DD&A expenses	2,429		4,129			(41	)	7,249		15,143			(52	)
G&A expenses	659		2,852			(77	)	2,734		3,595			(24	)
Foreign exchange loss (gain)	1,613		(1,385		)	216		859		(1,363		)	163
	6,389		7,202			(11	)	16,256		22,693			(28	)
Income (loss) from continuing operations before income taxes	$	1,746	$	(337	)	618		$	7,446	$	(3,663	)	303
Production (1)
Oil and NGL's, bbl	92,361		69,136			34		247,901		199,929			24
Average Prices
Oil and NGL's per bbl	$	83.39	$	95.23		(12	)	$	90.40	$	93.72		(4	)
Segmented Results of Operations per bbl
Oil sales	$	83.39	$	95.23		(12	)	$	90.40	$	93.72		(4	)
Interest income	4.69		4.06			16		5.21		1.46			257
	88.08		99.29			(11	)	95.61		95.18			—
Operating expenses	18.28		23.23			(21	)	21.84		26.60			(18	)
DD&A expenses	26.30		59.72			(56	)	29.24		75.74			(61	)
G&A expenses	7.14		41.25			(83	)	11.03		17.98			(39	)
Foreign exchange loss (gain)	17.46		(20.03		)	187		3.47		(6.82		)	151
	69.18		104.17			(34	)	65.58		113.50			(42	)
Income (loss) from continuing operations before income taxes	$	18.90	$	(4.88	)	487		$	30.03	$	(18.32	)	264

(1) Production represents production volumes NAR adjusted for inventory changes.

For the three and nine months ended September 30, 2014, income from continuing operations before income taxes was $1.7 million and $7.4 million compared with loss from continuing operations before income taxes of $0.3 million and $3.7 million in the comparable periods in 2013. Income from continuing operations before income taxes resulted fromincreased oil and natural gas sales, decreased DD&A and G&A expenses, partially offset by foreign exchange losses. In the second quarter of 2013, we recorded a ceiling test impairment loss of $2.0 million due to lower realized prices and an increase in estimated operating costs.

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Oil and NGL production in Brazil is from the Tiê field in Block 155 in the onshore Recôncavo Basin. Oil and NGL production for the three and nine months ended September 30, 2014, increased to 92.4 Mbbl or 1,004 bopd and 247.9 Mbbl or 908 bopd compared with 69.1 Mbbl or 751 bopd and 199.9 Mbbl or 732 bopd, respectively, in the comparable periods in 2013. Production increased primarily as a result of the successful dual completion of the 4-GTE-04-BA well, partially offset by the impact of well downtime for workovers. Our production in Brazil continues to be limited due to gas flaring restrictions and we are continuing to evaluate options to mitigate the effect of these restrictions.

Revenue and other incomeincreased to $8.1 million and $23.7 million, respectively, for the three and nine months ended September 30, 2014, compared with $6.9 million and $19.0 million in the comparable periods in 2013. The increase was due to higher production levels, partially offset by decreased average realized prices. For the three and nine months ended September 30, 2014, the average realized price per bbl for oil decreased by 12% to $83.39 and by 4% to $90.40, respectively. The price we receive in Brazil is at a discount to Brent due to refining and quality discounts.

Operating expensesincreased to $1.7 million and $5.4 million, respectively, for the three and nine months ended September 30, 2014, compared with $1.6 million and $5.3 million in the comparable periods in 2013. On a per bbl basis, operating expenses decreased to $18.28 and $21.84 for the three and nine months ended September 30, 2014, respectively, from $23.23 per bbl and $26.60 per bbl in the corresponding periods in 2013, respectively. Operating expenses per bbl decreased due to lower water disposal and slickline services costs, partially offset by increased workover expenses in the nine months ended September 30, 2014.

DD&A expenses were $2.4 million ($26.30 per bbl) and $7.2 million ($29.24 per bbl) in the three and nine months ended September 30, 2014, respectively, compared with $4.1 million ($59.72 per bbl) and $15.1 million ($75.74 per bbl) in the comparable periods in 2013. In the second quarter of 2013, we recorded a ceiling test impairment loss of $2.0 million, as discussed earlier. On a per bbl basis, in addition to the 2013 impairment charge, the decrease was due to an increase in reserves and a decrease in costs in the depletable base relating to lower future development costs and the receipt of a termination payment relating to a former joint venture in the third quarter of 2013 that reduced the cost base.

G&A expenses were $0.7 million ($7.14 per bbl) and $2.7 million ($11.03 per bbl) in the three and nine months ended September 30, 2014, respectively, compared with $2.9 million ($41.25 per bbl) and $3.6 million ($17.98 per bbl) in the comparable periods in 2013. The decrease in G&A expenses was primarily due to withholding taxes on intercompany charges recorded in 2013 G&A expenses, partially offset by increased salaries expense due to increased headcount and lower G&A allocations to capital projects within the business unit as a result of lower capital activity in 2014.

For the three and nine months ended September 30, 2014, foreign exchange losses were $1.6 million and $0.9 million, respectively, compared with foreign exchange gains of$1.4 million in the three and nine months ended September 30, 2013. The Brazilian Real weakened by 11% and 1% against the U.S. dollar in the three months ended September 30, 2014 and 2013, respectively and by 5% and 9% against the U.S. dollar in the nine months ended September 30, 2014 and 2013, respectively.

Capital Program – Brazil

Capital expenditures in the three months ended September 30, 2014, were $3.4 million bringing total capital expenditures for the nine months ended September 30, 2014, to $17.2 million. Capital expenditures in the three months ended September 30, 2014 included drilling of $1.9 million, G&G expenditures of $0.4 million, and other expenditures of $1.1 million.

Our third quarter 2014 capital program in Brazil included:

• On Block REC-T-155 (100% WI, operated), we continued to evaluate alternatives for the 1-GTE-07HPC-BA exploration well and performed planning activities for future drilling activity.

Outlook – Brazil

The 2014 capital program in Brazil is $26 million with $14 million allocated to drilling, $3 million to facilities and pipelines and $9 million for G&G and other expenditures.

Our planned work program for the remainder of 2014 in Brazil will focus on facilities work in the Tiê field along with 3-D seismic acquisition on Block REC-T-86, Block REC-T-117 and Block REC-T-118. We will continue the study of two unconventional resource plays in 2014 through core analysis, geochemistry studies, 3-D seismic acquisition and re-processing and evaluating ongoing fracture stimulation test results, among other activities in an effort to establish the commercial viability of the resource opportunity in oil-saturated tight sandstones and shales in the Recôncavo Basin.

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Julio Cesar Moreira, President of Gran Tierra Energy Brazil, will be leaving Gran Tierra Energy Brazil on November 7, 2014.  Mr. Moreira’s responsibilities will be taken over by two current members of management of Gran Tierra Energy Brazil, who are being promoted to General Manager of Brazil and Operations Director of Brazil, respectively.

Results from Continuing Operations - Corporate Activities

	Three Months Ended September 30,							Nine Months Ended September 30,
	2014			2013 (1)			% Change	2014 (1)			2013 (1)			% Change
(Thousands of U.S. Dollars)
Interest income	$	240		$	126		90	$	448		$	456		(2	)
DD&A expenses	254			246			3	726			767			(5	)
G&A expenses	6,129			4,647			32	16,697			11,614			44
Foreign exchange loss (gain)	274			(101		)	371	155			412			(62	)
Financial instruments loss	2,540			—			—	2,201			—			—
	9,197			4,792			92	19,779			12,793			55
Loss from continuing operations before income taxes	$	(8,957	)	$	(4,666	)	92	$	(19,331	)	$	(12,337	)	57

(1) Certain entities which were previously reported in Corporate Activities were sold as part of the Argentina business unit, and amounts previously reported in Corporate Activities related to these entities have been reclassified to loss from discontinued operations.

G&Aexpenses in the three and nine months ended September 30, 2014, were $6.1 million and $16.7 million, respectively, compared with $4.6 million and $11.6 million in the comparable periods in 2013. For the three months ended September 30, 2014, the increase in G&A expenses was primarily due to increased consulting expenses related to new information technology and legal fees for corporate reorganizations and related tax planning fees.

For the nine months ended September 30, 2014, the increase in G&A expenses was primarily due to higher salaries, higher consulting and information technology expenses associated with increased activity and higher stock-based compensation expense associated with RSUs and stock options granted. The annual grant to employees was not made until May 2013 in the prior year, therefore, no expense was recorded relating to the annual grant in the three months ended March 31, 2013, reducing stock-based compensation expense for the nine months ended September 30, 2013. During the nine months ended September 30, 2013, we received $1.0 million from the U.S. Federal Government for assets recovered from our former U.S. securities counsel as compensation for damages suffered in 2006. This amount was recorded as a reduction of G&A expenses in the corresponding period in 2013.

Financial instruments losswas$2.5 million and $2.2 million in the three and nine months ended September 30, 2014, respectively, and consisted solely of unrealized financial instruments losses on the Madalena shares we received in connection with the sale of our Argentina business unit.

Results from Discontinued Operations

On June 25, 2014, we sold our Argentina business unit to Madalena for aggregate consideration of $69.3 million, comprising $55.4 million in cash and $13.9 million in Madalena shares.

Loss from discontinued operations, net of income taxes was $nil and $27.0 million for the three and nine months ended September 30, 2014, respectively, compared with $7.2 million and $11.0 million, respectively, in the corresponding periods in 2013. For the nine months ended September 30, 2014, loss from discontinued operations, net of tax, included loss on disposal of $19.3 million and loss from operations after income taxes of $7.7 million.

The following table presents results from discontinued operations before income taxes for the three and nine months ended September 30, 2014, and the corresponding periods in 2013. Results from discontinued operations before income taxes for the

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nine months ended September 30, 2014, was calculated to the date of sale of June 25, 2014. Loss from operations of discontinued operations before income taxesfor the three months ended September 30, 2014, was $nil due to the sale of our Argentina business unit on June 25, 2014.

	Three Months Ended September 30,							Nine Months Ended September 30,
	2014 (1)		2013 (1) (2)			% Change		2014 (1)			2013 (1) (2)			% Change
(Thousands of U.S. Dollars)
Oil and natural gas sales	$	—	$	18,151		(100	)	$	31,938		$	54,621		(42	)
Interest income	—		165			(100	)	47			714			(93	)
	—		18,316			(100	)	31,985			55,335			(42	)
Operating expenses	—		10,518			(100	)	14,612			27,422			(47	)
DD&A expenses	—		7,606			(100	)	13,684			22,986			(40	)
G&A expenses	—		2,905			(100	)	5,579			7,960			(30	)
Foreign exchange loss	—		1,450			(100	)	4,362			3,220			35
	—		22,479			(100	)	38,237			61,588			(38	)
Loss from operations of discontinued operations before income taxes	$	—	$	(4,163	)	(100	)	$	(6,252	)	$	(6,253	)	—
Production (3)
Oil and NGL's, bbl	—		202,960			(100	)	377,795			673,919			(44	)
Natural gas, Mcf	—		278,186			(100	)	713,262			918,402			(22	)
Total production, BOE	—		249,324			(100	)	496,672			826,986			(40	)
Average Prices
Oil and NGL's per bbl	$	—	$	83.09		(100	)	$	75.98		$	75.20		1
Natural gas per Mcf	$	—	$	4.62		(100	)	$	4.53		$	4.29		6
Segmented Results of Operations per BOE
Oil and natural gas sales	$	—	$	72.80		(100	)	$	64.30		$	66.05		(3	)
Interest income	—		0.66			(100	)	0.09			0.86			(90	)
	—		73.46			(100	)	64.39			66.91			(4	)
Operating expenses	—		42.19			(100	)	29.42			33.16			(11	)
DD&A expenses	—		30.51			(100	)	27.55			27.79			(1	)
G&A expenses	—		11.65			(100	)	11.23			9.63			17
Foreign exchange loss	—		5.82			(100	)	8.78			3.89			126
	—		90.17			(100	)	76.98			74.47			3
Loss from operations of discontinued operations before income taxes	$	—	$	(16.71	)	(100	)	$	(12.59	)	$	(7.56	)	67

(1) Results from discontinued operations before income taxes for the nine months ended September 30, 2014, were calculated to the date of sale of June 25, 2014.

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(2) Certain entities which were previously reported in Corporate Activities were sold as part of the Argentina business unit. Amounts in the table above include results of these entities which were insignificant in addition to results of the Argentina segment.

(3) Production represents production volumes NAR adjusted for inventory changes.

For the nine months ended September 30, 2014,loss from operations of discontinued operations before income taxes was $6.3 million which was consistent with the comparative period in 2013. Results from discontinued operations before income taxes for the nine months ended September 30, 2014, were calculated to the date of sale of June 25, 2014, and, therefore, included only six months of results compared with nine months in the corresponding period in 2013. We reclassified the Argentina assets as assets held for sale on May 29, 2014, and ceased recognizing DD&A expense on the assets from this date.

Liquidity and Capital Resources

At September 30, 2014, we had cash and cash equivalents of $360.4 million compared with $428.8 million at December 31, 2013.

We believe that our cash resources, including cash on hand, cash generated from operations and use of our credit facility, will provide us with sufficient liquidity to meet our strategic objectives and planned capital program for 2014 and our planned operations for the next 12 months, given current oil price trends and production levels. In accordance with our investment policy, cash balances are held in our primary cash management bank, HSBC Bank plc., in interest earning current accounts or are invested in U.S. or Canadian government-backed federal, provincial or state securities or other money market instruments with high credit ratings and short-term liquidity. We believe that our current financial position provides us the flexibility to respond to both internal growth opportunities and those available through acquisitions.

At September 30, 2014, 85% of our cash and cash equivalents was generally not available to fund domestic or head office operations unless funds are repatriated, because it was held by subsidiaries and partnerships outside of Canada and the United States. At this time, we do not intend to repatriate further funds, but if we did, we might have to accrue and pay withholding taxes in certain jurisdictions on the distribution of accumulated earnings. Undistributed earnings of foreign subsidiaries are considered to be permanently reinvested and a determination of the amount of unrecognized deferred tax liability on these undistributed earnings is not practicable.

The government in Brazil requires us to register funds that enter and exit the country with the central bank in Brazil. In Brazil and Colombia, all transactions must be carried out in the local currency of the country. In Colombia, we participate in the Special Exchange Regime, which allows us to receive revenue in U.S. dollars offshore. We may also pay invoices denominated in U.S. dollars for our Colombian business from these U.S. dollars received offshore. In Peru, expenditures may be paid in local currency or U.S. dollars.

At September 30, 2014, one of our subsidiaries had a credit facility with a syndicate of banks, led by Wells Fargo Bank National Association as administrative agent. This reserve-based facility has current borrowing base of $150 million and a maximum borrowing base up to $300 million and is supported by the present value of the petroleum reserves of two of our subsidiaries with operating branches in Colombia and our subsidiary in Brazil. Amounts drawn down under the facility bear interest at the U.S. dollar LIBOR rate plus a margin ranging between 2.25% and 3.25% per annum depending on the rate of borrowing base utilization. In addition, a stand-by fee of 0.875% per annum is charged on the unutilized balance of the committed borrowing base and is included in G&A expenses. The credit facility was entered into on August 30, 2013, and became effective on October 31, 2013, for a three-year term. Subsequent to the effective date, we have not drawn down any amounts under the new credit facility. Under the terms of the facility, we are required to maintain and were in compliance with certain financial and operating covenants. Under the terms of the credit facility, we cannot pay any dividends to our shareholders if we are in default under the facility and, if we are not in default, we are required to obtain bank approval for any dividend payments exceeding $2.0 million in any fiscal year.

Cash Flows

During the nine months ended September 30, 2014, our cash and cash equivalents decreased by $68.4 million as a result of

cash used in investing activities of $219.4 million (including $12.4 million of cash used by investing activities of discontinued operations), partially offset by cash provided by operating activities of $139.8 million (included $4.8 million of cash used in operating activities of discontinued operations) and cash provided by financing activities of $11.2 million. During the nine months ended September 30, 2013, our cash and cash equivalents increased by $140.4 million as a result of cash provided by operating activities of $349.1 million (included $28.2 million of cash provided by operating activities of discontinued

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operations) and cash provided by financing activities of $3.4 million, partially offset by cash used in investing activities of $212.1 million (included $13.1 million cash used for investing activities of discontinued operations).

Cash provided by operating activities of continuing operations in the nine months ended September 30, 2014, was primarily affected by decreased oil and natural gas sales, increased G&A expenses and realized foreign exchange loss, and a $116.4 million change in assets and liabilities from operating activities. These decreases were partially offset by lower income tax expenses and realized financial instruments gain. The main changes in assets and liabilities from operating activities were as follows: accounts receivable increased by $61.2 million primarily due to an increase in the number of days of sales outstanding in Colombia as a result of a higher portion of sales being to Ecopetrol which has longer payment terms than our other significant customers; inventory increased by $1.7 million primarily due to the timing of recognition of oil sales to a customer in Colombia where the sale is not recognized until the customer exports oil; accounts payable and accrued liabilities decreased by $1.0 million due to the timing of payments for drilling activity, partially offset by higher accruals for trucking costs; and net taxes payable decreased by $55.1 million primarily due to payment of 2013 income taxes in Colombia.

Cash provided by operating activities of continuing operations in the nine months ended September 30, 2013, was affected by increased oil and natural gas sales, decreased G&A expenses, and lower realized foreign exchange losses. These increases were partially offset by increased operating and income tax expenses. and a $48.5 million increase in assets and liabilities from operating activities. The main changes in assets and liabilities from operating activities were as follows: accounts receivable increased by $35.6 million primarily due to higher production in Colombia; inventory decreased by $12.6 million primarily due to the timing of recognition of oil sales to a short-term customer in Colombia where the sale was recognized when the customer exported oil; accounts payable and accrued liabilities decreased by $8.3 million due to the timing of payments for drilling activity and reduced capital activity; and taxes payable increased and taxes receivable decreased for a combined effect of

$80.9 million resulting in net taxes payable due to increased taxable income in Colombia, increased taxes in Brazil as a result of the receipt of a termination payment and the reimbursement of value added tax receivable.

Cash used in investing activities of continuing operations in the nine months ended September 30, 2014, included cash capital expenditures of $250.6 million which was partially offset by proceeds from the sale of the Argentina business unit net of cash sold and transaction costs of $42.8 million and a decrease in restricted cash of $0.9 million. Cash outflows from investing activities of continuing operations in the nine months ended September 30, 2013, included cash capital expenditures of $249.6 million and an increase in restricted cash of $4.9 million, partially offset by proceeds from sale of oil and gas properties of $55.5 million. 

Cash provided by financing activities of continuing operations in the nine months endedSeptember 30, 2014 and 2013, related to proceeds from issuance of shares of our Common Stock upon the exercise of stock options.

Off-Balance Sheet Arrangements

As at September 30, 2014, we had no off-balance sheet arrangements.

Critical Accounting Policies and Estimates

Our critical accounting policies and estimates are disclosed in Item 7 of our 2013 Annual Report on Form 10-K, filed with the SEC on February 26, 2014, and have not changed materially since the filing of that document, except as disclosed below.

Derivative Activities

We purchase Colombian peso non-deliverable forward contracts for purposes of fixing the exchange rate at which we will purchase or sell Colombian pesos to settle our income tax installment payments. Under the terms of our foreign exchange forward contracts, we will receive Colombian pesos and pay U.S. dollars or pay Colombian pesos and receive U.S. dollars based on a total notional amount.

The fair value of foreign currency derivatives is based on the maturity value of the foreign exchange non-deliverable forward contracts, using applicable forward exchange rates. The most significant variable to the cash flow calculations is the estimation of forward foreign exchange rates. The resulting net future cash inflows or outflows at maturity of the contracts are the net value of the contract.

Counterparty credit risk has not had a significant effect on our cash flow calculations and derivative valuations because the Company utilizes a group of investment-grade rated counterparties, primarily financial institutions, for its derivative transactions. Because we have chosen not to qualify our derivatives for hedge accounting treatment, changes in the fair values

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of derivatives can have a significant impact on our reported results of operations. Generally, changes in derivative fair values will not impact our liquidity or capital resources.

Settlements of derivative instruments, regardless of whether they qualify for hedge accounting, do have an impact on our liquidity and results of operations. Generally, if actual market prices are higher than the price of the derivative instruments, our net earnings and cash flow from operations will be lower relative to the results that would have occurred absent these instruments. The opposite is also true.

Accounting Pronouncements Not Yet Adopted

In May 2014, the Financial Accounting Standards Board issued Accounting Standards Update (“ASU”) 2014-09, “Revenue from Contracts with Customers". The ASU creates a single source of revenue guidance for all companies in all industries and requires revenue recognition to depict the transfer of goods or services to customers in an amount that reflects the consideration to which the entity expects to be entitled in exchange for those goods or services. ASU 2014-09 sets forth a new revenue recognition model that requires identifying the contract, identifying the performance obligations, determining the transaction price, allocating the transaction price to performance obligations and recognizing the revenue upon satisfaction of performance obligations. The amendments in the ASU can be applied either retrospectively to each prior reporting period presented or retrospectively with the cumulative effect of initially applying the update recognized at the date of the initial application along with additional disclosures. The ASU will be effective for fiscal years, and interim periods within those years, beginning after December 15, 2016. The Company is currently assessing the impact the new standard will have on its consolidated financial position, results of operations, cash flows, and disclosure.

Item 3. Quantitative and Qualitative Disclosures About Market Risk

Our principal market risk relates to oil prices. Most of our revenues are from oil sales at prices which reflect the blended prices received upon shipment by the purchaser at defined sales points or are defined by contract relative to WTI or Brent and adjusted for quality each month.

Foreign currency risk is a factor for our company but is ameliorated to a certain degree by the nature of expenditures and revenues in the countries where we operate. We have engaged in non-deliverable foreign exchange contracts to buy or sell Colombian pesos in order to fix the exchange rate of our income tax installment payments in Colombia. Our reporting currency is U.S. dollars and essentially 100% of our revenues are related to the U.S. dollar price of WTI or Brent oil.

In Colombia, we receive 100% of our revenues in U.S. dollars and the majority of our capital expenditures are in U.S. dollars or are based on U.S. dollar prices. In Brazil, prices for oil are in U.S. dollars, but revenues are received in local currency translated according to current exchange rates. The majority of our capital expenditures within Brazil are based on U.S. dollar prices, but are paid in local currency translated according to current exchange rates. In Peru, capital expenditures are based on U.S. dollar prices and may be paid in local currency or U.S. dollars. The majority of income and value added taxes and G&A expenses in all locations are in local currency. While we operate in South America exclusively, the majority of our acquisition expenditures have been valued and paid in U.S. dollars.

Additionally, foreign exchange gains and losses result from the fluctuation of the U.S. dollar to the Colombian peso due to our current and deferred tax liabilities, which are monetary liabilities, denominated in the local currency of the Colombian foreign operations. As a result, a foreign exchange gain or loss must be calculated on conversion to the U.S. dollar functional currency. A strengthening in the Colombian peso against the U.S. dollar results in foreign exchange losses, estimated at $80,000 for each one peso decrease in the exchange rate of the Colombian peso to one U.S. dollar. At September 30, 2014, we held Colombia peso non-deliverable forward contracts totaling 26,087.2 million Colombian pesos for purposes of fixing the exchange rate at which we will purchase and/or sell Colombian pesos to settle our income tax installment payments due in February 2015.

Exchange Rate Sensitivity

The table below provides information about our foreign currency forward exchange agreement at September 30, 2014, including the notional amounts and weighted average exchange rates by expected (contractual) maturity dates. Expected cash flows from the forward contract equals the fair value of the contract. The information is presented in U.S. dollars because that is our reporting currency. The increase or decrease in the value of the forward contract is offset by the increase or decrease to the U.S. dollar equivalent of the Colombian peso current tax liabilities.

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Forward contracts
Currency	Contract Type	Notional (Millions of Colombian Pesos)	Weighted Average Fixed Rate Received (Colombian Pesos - U.S. Dollars)	Fair Value of the Forward Contracts (thousands of U.S. Dollars)		Expiration
Colombian pesos	Buy	15,811.9	1,885	(652	)	February 2015
Colombian pesos	Sell	10,275.3	1,895	414		February 2015

We consider our exposure to interest rate risk to be immaterial. Our interest rate exposures primarily relate to our investment portfolio. Our investment objectives are focused on preservation of principal and liquidity. By policy, we manage our exposure to market risks by limiting investments to high quality bank issues at overnight rates, or U.S. or Canadian government-backed federal, provincial or state securities or other money market instruments with high credit ratings and short-term liquidity. A 10% relative change in interest rates would not have a material effect on the value of our investment portfolio. We do not hold any of these investments for trading purposes. We have no debt.

Equity Investment in Madalena Energy Inc.

We hold an equity investment in Madalena Energy Inc. ("Madalena"), received as consideration in the sale of our Argentina business unit, which closed June 25, 2014. We hold 29,831,537 shares of Madalena which had a value of $11.7 million and represented approximately 5.7% of Madalena's outstanding shares at September 30, 2014. These shares trade on the TSX Venture Exchange, and as such are subject to changes in value that are outside of our control. Pursuant to Canadian securities regulation, we were unable to trade these shares before October 26, 2014. In addition, we may face other market related obstacles such as trading volume and value in divesting these shares.

Item 4. Controls and Procedures

Disclosure Controls and Procedures

We have established disclosure controls and procedures (as defined in Rules 13a-15(e) and 15d-15(e) under the Securities Exchange Act of 1934, or Exchange Act). Our management, including our Chief Executive Officer and Chief Financial Officer, evaluated the effectiveness of the design and operation of our disclosure controls and procedures as of the end of the period covered by this report, as required by Rule l3a-15(e) of the Exchange Act. Based on their evaluation, our principal executive and principal financial officers have concluded that Gran Tierra's disclosure controls and procedures were effective as of September 30, 2014, to provide reasonable assurance that the information required to be disclosed by Gran Tierra in the reports that it files or submits under the Exchange Act is recorded, processed, summarized and reported within the time periods specified in the SEC rules and forms and that such information is accumulated and communicated to management, including our Chief Executive Officer and Chief Financial Officer, as appropriate, to allow timely decisions regarding required disclosure.

Changes in Internal Control over Financial Reporting

There were no changes in our internal control over financial reporting during the quarter ended September 30, 2014, that have materially affected, or are reasonably likely to materially affect, our internal control over financial reporting. On May 14, 2013, the Committee of Sponsoring Organizations of the Treadway Commission published an updated Internal Control - Integrated Framework and related illustrative documents which will supersede the 1992 COSO Framework as of December 15, 2014. As of September 30, 2014, Gran Tierra was utilizing the original framework published in 1992, but is transitioning to the COSO 2013 Framework as it relates to its Internal Control over Financial Reporting.

PART II - Other Information

Item 1. Legal Proceedings

As discussed in Note 9 of Notes to Condensed Consolidated Financial Statements (Unaudited) in Part I, Item 1 above, Gran Tierra’s production from the Costayaco Exploitation Area is subject to the HPR royalty, which applies when cumulative gross production from an Exploitation Area is greater than five MMbbl. The HPR royalty is calculated on the difference between a trigger price defined in the Chaza Contract and the sales price. The ANH has interpreted the Chaza Contract as requiring that the HPR royalty must be paid with respect to all production from the Moqueta Exploitation Area and initiated a noncompliance

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procedure under the Chaza Contract, which was contested by Gran Tierra because the Moqueta Exploitation Area and the Costayaco Exploitation Area are separate Exploitation Areas. ANH did not proceed with that noncompliance procedure. Gran Tierra also believes that the evidence shows that the Costayaco and Moqueta fields are two clearly separate and independent hydrocarbon accumulations. Therefore, it is Gran Tierra’s view that, pursuant to the terms of the Chaza Contract, the HPR royalty is only to be paid with respect to production from the Moqueta Exploitation Area when the accumulated oil production from that Exploitation Area exceeds five MMbbl. Discussions with the ANH have not resolved this issue and Gran Tierra has initiated the dispute resolution process under the Chaza Contract by filing on January 14, 2014, an arbitration claim before the Center for Arbitration and Conciliation of the Chamber of Commerce of Bogotá, Colombia, seeking a decision that the HPR royalty is not payable until production from the Moqueta Exploitation Area exceeds five MMbbl. The ANH has filed a response to the claim seeking a declaration that its interpretation is correct and a counterclaim seeking, amongst other remedies, declarations that Gran Tierra breached the Chaza Contract by not paying the disputed HPR royalty, that the amount of the alleged HPR royalty that is payable, and that the Chaza Contract be terminated. Gran Tierra filed a response to the ANH's counterclaim and filed its comments on the ANH's responses to Gran Tierra's claim. The ANH filed an amended counterclaim and Gran Tierra filed a response to the ANH's amended counterclaim. As at September 30, 2014, total cumulative production from the Moqueta Exploitation Area was 3.7 MMbbl. The estimated compensation which would be payable on cumulative production to that date if the ANH is successful in the arbitration is $59.7 million. At this time, no amount has been accrued in the financial statements nor deducted from our reserves for the disputed HPR royalty as Gran Tierra does not consider it probable that a loss will be incurred.

Additionally, the ANH and Gran Tierra are engaged in discussions regarding the interpretation of whether certain transportation and related costs are eligible to be deducted in the calculation of the HPR royalty. Discussions with the ANH are ongoing. Based on our understanding of the ANH's position, the estimated compensation which would be payable if the ANH’s interpretation is correct could be up to $38.9 million as at September 30, 2014. At this time no amount has been accrued in the financial statements as Gran Tierra does not consider it probable that a loss will be incurred.

We have several other lawsuits and claims pending. Although the outcome of these lawsuits and disputes cannot be predicted with certainty, we believe the resolution of these matters would not have a material adverse effect on our consolidated financial position, results of operations or cash flows. We record costs as they are incurred or become probable and determinable.

Item 1A. Risk Factors

The risks relating to our business and industry, as set forth in our Annual Report on Form 10-K for the year ended December 31, 2013, filed with the Securities and Exchange Commission on February 26, 2014, are set forth below and are unchanged substantively at September 30, 2014, other than those designated by an asterisk “*”, which changes include the deletion of disclosure in risk factors relating to our former Argentina operations, which have been deleted as we sold our Argentina business unit on June 25, 2014, as well as the deletion of those entire risk factors relating solely to our former Argentina operations.

Risks Related to Our Business

Guerrilla Activity in Colombia Has Disrupted and Delayed, and Could Continue to Disrupt or Delay, Our Operations and We Are Concerned About Safeguarding Our Operations and Personnel in Colombia.

During 2012 and 2013, guerrilla activity in Colombia increased significantly, and the activity level has remained high in 2014. This increased activity creates a greater risk for our operations and our employees and our mitigation activities may not be adequate to alleviate the risks arising from such guerrilla activity.

For over 40 years, the Colombian government has been engaged in a civil war with two main Marxist guerrilla groups: the Revolutionary Armed Forces of Colombia ("FARC") and the National Liberation Army ("ELN"). Both of these groups have been designated as terrorist organizations by the United States and the European Union. Another threat comes from criminal gangs formed from the former members of the United Self-Defense Forces of Colombia militia, a paramilitary group that originally sprouted up to combat FARC and ELN, which the Colombian government successfully dissolved.

We operate principally in the Putumayo Basin in Colombia, and have properties in other basins, including the Catatumbo, Cauca, Llanos, Sinu-San Jacinto, Middle Magdalena and Lower Magdalena Basins. The Putumayo and Catatumbo regions have been the breeding place of guerrilla activity. Pipelines have been primary targets because such pipelines cannot be adequately secured due to the sheer length of such pipelines and the remoteness of the areas in which the pipelines are laid. The Ecopetrol-operated Trans-Andean oil pipeline (the "OTA pipeline”) which transports oil from the Putumayo region and upon which we materially rely has been targeted by these guerrilla groups. Starting in 2008, the OTA pipeline experienced outages of various lengths. In 2012, the

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OTA pipeline was shutdown for over 162 days and the shutdown had a material adverse effect on our deliveries to Ecopetrol and our financial performance for 2012. Recently we have experienced outages from October 2012 through to October 2014. In 2013, the OTA pipeline was shutdown for approximately 229 days. In the nine months ended September 30, 2014, the OTA pipeline was shutdown for approximately 155 days. We have employed mitigation strategies as discussed in the risk "We May Encounter Difficulties Storing and Transporting Our Production, Which Could Cause a Decrease in Our Production or an Increase in Our Expenses" later in this section. Such disruptions may continue indefinitely and could harm our business.

In 2013, we experienced damage to two of our facilities in the amount of approximately $0.8 million. Production of about 330 bopd was shut in for 39 days. No long-term environmental damage or injury to personnel occurred in either incident. Continuing attempts by the Colombian government to reduce or prevent guerrilla activity may not be successful and guerrilla activity may continue to disrupt our operations in the future. Our efforts to increase security measures may not be successful and there can also be no assurance that we can maintain the safety of our or our contractors' field personnel and Bogota head office personnel or operations in Colombia or that this violence will not continue to adversely affect our operations in the future and cause significant loss.

*Our Lack of Diversification Will Increase the Risk of an Investment in Our Common Stock.

Our business focuses on the oil and gas industry in a limited number of properties in Colombia, Peru, and Brazil. Most of our production is in one basin in Colombia. As a result, we lack diversification, in terms of both the nature and geographic scope of our business. Accordingly, factors affecting our industry or the regions in which we operate, including the geographic remoteness of our operations and weather conditions, will likely impact us more acutely than if our business was more diversified. In particular, most of our production is from two fields in the Putumayo Basin in Colombia, and we depend on the OTA pipeline and alternative transportation arrangements to transport our oil to market. Cash flow from these sales funds a large part of our business. Disruptions to this pipeline, as described in the risk "We May Encounter Difficulties Storing and Transporting Our Production, Which Could Cause a Decrease in Our Production or an Increase in Our Expenses", or decline in production from these fields because of the natural aging cycle of the reservoir could harm our business in Colombia and other countries.

*We May Encounter Difficulties Storing and Transporting Our Production, Which Could Cause a Decrease in Our Production or an Increase in Our Expenses.

To sell the oil and natural gas that we are able to produce, we have to make arrangements for storage and distribution to the market. We rely on local infrastructure and the availability of transportation for storage and shipment of our products, but infrastructure development and storage and transportation facilities may be insufficient for our needs at commercially acceptable terms in the localities in which we operate. This could be particularly problematic to the extent that our operations are conducted in remote areas that are difficult to access, such as areas that are distant from shipping and/or pipeline facilities. In certain areas, we may be required to rely on only one gathering system, trucking company or pipeline, and, if so, our ability to market our production would be subject to their reliability and operations. These factors may affect our ability to explore and develop properties and to store and transport our oil and gas production, and may increase our expenses. Furthermore, future instability in one or more of the countries in which we operate, weather conditions or natural disasters, actions by companies doing business in those countries, labor disputes or actions taken by the international community may impair the distribution of oil and/or natural gas and in turn diminish our financial condition or ability to maintain our operations.

The majority of our oil in Colombia is contracted for delivery to a single pipeline owned by CENIT S.A. ("CENIT"), a wholly-owned subsidiary of Ecopetrol, and operated by Ecopetrol. Sales of oil have been and could continue to be disrupted by damage to this pipeline or displaced by Ecopetrol’s use of the pipeline itself. Under our transportation contract with CENIT, the delivery point for our oil is at the end of the pipeline. This creates a risk of loss of oil due to sabotage by guerrillas or theft from the pipeline which may result in reduced revenues and increased clean-up or third party costs. We have attempted to mitigate the risk of increased costs with insurance and are investigating potential ways to mitigate and reduce revenue risk. CENIT and Ecopetrol maintain responsibility for clean-up of any spilled oil and for pipeline repair.

Problems with these pipelines can cause interruptions to our producing activities if they are for a long enough duration that our storage facilities become full. For example, we experienced disruptions in transportation on this pipeline in March and April of 2008, June, July and August of 2009, June, August, and September 2010, February 2011, February to August of 2012 and October 2012 to October 2014, as a result of sabotage by guerrillas. In addition, there is competition for space in these pipelines, and additional discoveries in our area of operations by other companies could decrease the pipeline capacity available to us. Trucking is an alternative to transportation by pipeline; however, it is generally more expensive and carries higher safety risks for us, our employees and the public.

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Alternative transportation arrangements in Colombia allowed us to deliver our full production during 2013 and the first nine months of 2014; however, these deliveries result in reduced realized prices compared to the Ecopetrol operated OTA pipeline deliveries and are not necessarily sustainable. When disruptions are of a long enough duration, our sales volumes may be lower than normal, which will cause our cash flow to be lower than normal, and if our storage facilities become full, we can be forced to reduce production.

In Peru, oil produced during our long term test will be delivered via river barge. Suppliers of barges that meet our high standards for safety and reliability are limited and this may effect our ability to deliver the production volumes we have planned for the test.

*Our Oil Sales Will Depend on a Relatively Small Group of Customers, Which Could Adversely Affect Our Financial Results.

In 2013, oil sales in Colombia were mainly to Ecopetrol and one other customer. During the nine months ended September 30, 2014, we sold to Ecopetrol and three other main customers. While oil prices in Colombia are related to international market prices, lack of competition and reliance on a limited number of customers for sales of oil may diminish prices and depress our financial results.

In Brazil, there are a number of potential customers for our oil and we are working to establish relationships with as many as possible to ensure a stable market for our oil. Currently, essentially all of our production in Brazil is sold to Petróleo Brasileiro S.A (“Petrobras”). Petrobras’ refinery in the area of our operations has previously had some technical difficulties which have restricted its ability to receive deliveries. This could mean that we cannot produce to full capacity in the area because of restrictions in being able to deliver our oil.

*Our Business is Subject to Local Legal, Political and Economic Factors Which Are Beyond Our Control, Which Could Impair Our Ability to Expand Our Operations or Operate Profitably.

We operate our business in Colombia, Peru, and Brazil, and may eventually expand to other countries. Exploration and production operations in foreign countries are subject to legal, political and economic uncertainties, including terrorism, military repression, social unrest, strikes by local or national labor groups, interference with private contract rights (such as nationalization), extreme fluctuations in currency exchange rates, high rates of inflation, exchange controls, changes in tax rates, changes in laws or policies affecting environmental issues (including land use and water use), workplace safety, foreign investment, foreign trade, investment or taxation, as well as restrictions imposed on the oil and natural gas industry, such as restrictions on production, price controls and export controls. Our production in Brazil was shut in for three weeks in October 2013 as a result of a strike by employees of Petrobras which affected the crude oil receiving terminal we use in the Recôncavo Basin, and we have experienced minor delays in trucking operations due to demonstrations and strikes in our operating area during the nine months ended September 30, 2014. We do not know how long such labor action will last, and if it lasts a significant amount of time, it may affect our ability to meet our production targets.

South America has a history of political and economic instability. This instability could result in new governments or the adoption of new policies, laws or regulations that might assume a substantially more hostile attitude toward foreign investment, including the imposition of additional taxes. In an extreme case, such a change could result in termination of contract rights and expropriation of foreign-owned assets. Any changes in oil and gas or investment regulations and policies or a shift in political attitudes in Colombia, Peru or Brazil or other countries in which we intend to operate are beyond our control and may significantly hamper our ability to expand our operations or operate our business at a profit.

Changes in laws in the jurisdiction in which we operate or expand into with the effect of favoring local enterprises, and changes in political views regarding the exploitation of natural resources and economic pressures, may make it more difficult for us to negotiate agreements on favorable terms, obtain required licenses, comply with regulations or effectively adapt to adverse economic changes, such as increased taxes, higher costs, inflationary pressure and currency fluctuations. In certain jurisdictions the commitment of local business people, government officials and agencies and the judicial system to abide by legal requirements and negotiated agreements may be more uncertain, creating particular concerns with respect to licenses and agreements for business. These licenses and agreements may be susceptible to revision or cancellation and legal redress may be uncertain or delayed.

Recently, in the Department of Putumayo in Colombia where we operate, despite a company’s compliance with legislative requirements for prior consultation of communities and minority ethnic groups and the receipt of the necessary permits to drill and operate, new ethnic groups have been threatening, and in some cases using, the Judicial Branch of the Government, Superior Court of the Judicial District of Mocoa (the “Local Court”) to require that they be consulted, and thereby obtain

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benefits from companies operating in the Department of Putumayo as a result of those consultations. The Local Court has the ultimate jurisdiction to determine, upon a writ for protection or tutela, by an ethnic group (i) whether there has been a violation of a fundamental right to prior consultation by act or omission of a public authority or individual and (ii) whether the ethnic group is legitimate. If the Local Court determines that there has been a violation and the ethnic group is legitimate despite receipt by the company of its proper governmental permits, the Local Court has the power to invalidate a company’s permits and force the company to cease operations immediately until such time as the company can successfully appeal to the Supreme Court to overturn the Local Court’s decision or prior consultations are completed and the permits effective once again.

Property right transfers, joint ventures, licenses, license applications or other legal arrangements pursuant to which we operate may be adversely affected by the actions of government and judicial authorities and the effectiveness of and enforcement of our rights under such arrangements in these jurisdictions may be impaired and, if we are faced with a tutela, our operations in the area(s) governed by a Local Court’s order may be shut down for a period of time thereby causing significant harm to our business in Colombia.

Almost All of Our Cash and Cash Equivalents is Held Outside of Canada and the United States, and if We Determine to, or Are Required to, Repatriate These Funds, We Could be Subject to Significant Taxes.

At September 30, 2014, 85% of our cash and cash equivalents was held by subsidiaries and partnerships outside of Canada and the United States. This cash is generally not available to fund domestic or head office operations unless funds are repatriated. At this time, we do not intend to repatriate funds, but if we did, we might have to accrue and pay taxes in certain jurisdictions on the distribution of accumulated earnings.

We Have an Aggressive Business Plan, and if We do not Have the Resources to Execute on Our Business Plan, We May Be Required to Curtail Our Operations.

Our capital program for 2014 calls for approximately $472 million to fund our exploration and development, which we intend to fund through cash on hand and cash flows from operations at current production and commodity price levels. Funding this program relies in part on oil prices remaining close to current levels or higher and other factors to generate sufficient cash flow. If we are not able to generate the sales which, together with our current cash resources, are sufficient to fund our capital program, we will not be able to efficiently execute our business plan which would cause us to decrease our exploration and development, which could harm our business outlook, investor confidence and our share price.

Strategic and Business Relationships Upon Which We May Rely Are Subject to Change, Which May Diminish Our Ability to Conduct Our Operations.

Our ability to successfully bid on and acquire additional properties, to discover reserves, to participate in drilling opportunities and to identify and enter into commercial arrangements will depend on developing and maintaining effective working relationships with industry participants and on our ability to select and evaluate suitable partners and to consummate transactions in a highly competitive environment. These relationships are subject to change and may impair our ability to grow.

To develop our business, we enter into strategic and business relationships, which may take the form of joint ventures with other parties or with local government bodies, or contractual arrangements with other oil and gas companies, including those that supply equipment and other resources that we will use in our business. We also have an active business development program to develop those relationships and foster new relationships. We may not be able to establish these business relationships, or if established, we may choose the wrong partner or we may not be able to maintain them. In addition, the dynamics of our relationships with strategic partners may require us to incur expenses or undertake activities we would not otherwise be inclined to take to fulfill our obligations to these partners or maintain our relationships. If we fail to make the cash calls required by our joint venture partners in the joint ventures we do not operate, we may be required to forfeit our interests in these joint ventures. If our strategic relationships are not established or maintained, our business prospects may be limited, which could diminish our ability to conduct our operations.

In cases where we are the operator, our partners may not be able to fulfill their obligations, which would require us to either take on their obligations in addition to our own, or possibly forfeit our rights to the area involved in the joint venture. In addition, despite our partner’s failure to fulfill its obligations, if we elect to terminate such relationship, we may be involved in litigation with such partners or may be required to pay amounts in settlement to avoid litigation despite such partner’s failure to perform. Alternatively, our partners may be able to fulfill their obligations, but will not agree with our proposals as operator of the property. In this case there could be disagreements between joint venture partners that could be costly in terms of dollars, time, deterioration of the partner relationship, and/or our reputation as a reputable operator. These joint venture partners may not comply with their responsibilities or may engage in conduct that could result in liability to us.

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In cases where we are not the operator of the joint venture, the success of the projects held under these joint ventures is substantially dependent on our joint venture partners. The operator is responsible for day-to-day operations, safety, environmental compliance and relationships with government and vendors.

We have various work obligations on our blocks that must be fulfilled or we could face penalties, or lose our rights to those blocks if we do not fulfill our work obligations. Failure to fulfill obligations in one block can also have implications on the ability to operate other blocks in the country ranging from delays in government process and procedure to loss of rights in other blocks or in the country as a whole. Failure to meet obligations in one particular country may also have an impact on our ability to operate in others.

*Disputes or Uncertainties May Arise in Relation to Our Royalty Obligations

Our production is subject to royalty obligations which may be prescribed by government regulation or by contract. These royalty obligations may be subject to changes in interpretation as business circumstances change.

As discussed in Note 9 to the Condensed Consolidated Financial Statements in Part I, Item 1 above, our production from the Costayaco Exploitation Area is subject to the HPR royalty, which applies when cumulative gross production from an Exploitation Area is greater than five MMbbl. The HPR royalty is calculated on the difference between a trigger price defined in the Chaza Contract and the sales price. The ANH has interpreted the Chaza Contract as requiring that the HPR royalty must be paid with respect to all production from the Moqueta Exploitation Area and initiated a noncompliance procedure under the Chaza Contract, which we contested because the Moqueta Exploitation Area and the Costayaco Exploitation Area are separate Exploitation Areas. ANH did not proceed with that noncompliance procedure. We also believe that the evidence shows that the Costayaco and Moqueta fields are two clearly separate and independent hydrocarbon accumulations. Therefore, it is our view that, pursuant to the terms of the Chaza Contract, the HPR royalty is only to be paid with respect to production from the Moqueta Exploitation Area when the accumulated oil production from that Exploitation Area exceeds five MMbbl. Discussions with the ANH have not resolved this issue and we have initiated the dispute resolution process under the Chaza Contract and filed an arbitration claim seeking a decision that the HPR royalty is not payable until production from the Moqueta Exploitation Area exceeds five MMbbl. The ANH has filed a response to the claim seeking a declaration that its interpretation is correct and a counterclaim seeking, amongst other remedies, declarations that we breached the Chaza Contract by not paying the disputed HPR royalty, that the amount of the alleged HPR royalty that is payable, and that the Chaza Contract be terminated. As at September 30, 2014, total cumulative production from the Moqueta Exploitation Area was 3.7 MMbbl. The estimated compensation which would be payable on cumulative production to that date if the ANH is successful in the arbitration is $59.7 million. At this time no amount has been accrued in the financial statements nor deducted from our reserves for the disputed HPR royalty as we do not consider it probable that a loss will be incurred.

Additionally, the ANH and Gran Tierra are engaged in discussions regarding the interpretation of whether certain transportation and related costs are eligible to be deducted in the calculation of the HPR royalty. Discussions with the ANH are ongoing. Based on our understanding of the ANH's position, the estimated compensation which would be payable if the ANH’s interpretation is correct could be up to $38.9 million as at September 30, 2014. At this time no amount has been accrued in the financial statements as Gran Tierra does not consider it probable that a loss will be incurred.

Our Business May Suffer if We do not Attract and Retain Talented Personnel.

Our success will depend in large measure on the abilities, expertise, judgment, discretion, integrity and good faith of our executive team and other personnel in conducting our business. The loss of any of these individuals or our inability to attract suitably qualified individuals to replace any of them could materially adversely impact our business. We are experiencing difficulties in finding and retaining suitably qualified staff in certain jurisdictions, particularly in Brazil and Peru, where experienced personnel in our industry are in high demand and competition for their talents is intense.

Our success depends on the ability of our management and employees to interpret market and geological data successfully and to interpret and respond to economic, market and other business conditions to locate and adopt appropriate investment opportunities, monitor such investments and ultimately, if required, successfully divest such investments. Further, our key personnel may not continue their association or employment with us and we may not be able to find replacement personnel with comparable skills. If we are unable to attract and retain key personnel, our business may be adversely affected.

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Maintaining Good Community Relationships and Being a Good Corporate Citizen May be Costly and Difficult to Manage.

Our operations have a significant effect on the areas in which we operate. To enjoy the confidence of local populations and the local governments, we must invest in the communities where were operate. In many cases, these communities are impoverished and lack many resources taken for granted in North America. The opportunities for investment are large, many and varied; however, we must invest carefully in projects that will truly benefit these areas. Improper management of these investments and relationships could lead to a delay in operations, loss of license or major impact to our reputation in these communities, which could adversely affect our business.

Competition in Obtaining Rights to Explore and Develop Oil and Gas Reserves and to Market Our Production May Impair Our Business.

The oil and gas industry is highly competitive. Other oil and gas companies will compete with us by bidding for exploration and production licenses and other properties and services we will need to operate our business in the countries in which we expect to operate. Additionally, other companies engaged in our line of business may compete with us from time to time in obtaining capital from investors. Competitors include larger companies, which, in particular, may have access to greater resources than us, may be more successful in the recruitment and retention of qualified employees and may conduct their own refining and petroleum marketing operations, which may give them a competitive advantage. In addition, actual or potential competitors may be strengthened through the acquisition of additional assets and interests. In the event that we do not succeed in negotiating additional property acquisitions, our future prospects will likely be substantially limited, and our financial condition and results of operations may deteriorate.

*Foreign Currency Exchange Rate Fluctuations May Affect Our Financial Results.

We expect to sell our oil and natural gas production under agreements that will be denominated in U.S. dollars. Many of the operational and other expenses we incur will be paid in the local currency of the country where we perform our operations. Our income taxes in Colombia are paid in Colombian pesos. As a result, we are exposed to translation risk when local currency financial statements are translated to U.S. dollars, our functional currency. We are also exposed to transaction risk on settlement of payables and receivables denominated in foreign currency. We have purchased non-deliverable foreign exchange contracts to hedge some of the transaction risk related to our Colombian income tax payable. Since September 1, 2005, exchange rates between the Colombian peso and U.S. dollar have varied between 1,648 pesos to one U.S. dollar to 2,632 pesos to one U.S. dollar, a fluctuation of approximately 60%. Production in Brazil is invoiced and paid in Brazilian Reals. Since September 1, 2005, the exchange rate of the Brazilian Real has varied between 1.56 Reals to one U.S. dollar to 2.49 Reals to the U.S. dollar, a variance of 57%. Current and deferred tax liabilities in Colombia are denominated in Colombian pesos and the Colombian peso weakened by 5% against the U.S. dollar in the nine months ended September 30, 2014, resulting in a foreign exchange gain.

Our Operations Involve Substantial Costs and Are Subject to Certain Risks Because the Oil and Gas Industries in the Countries in Which We Operate Are Less Developed.

The oil and gas industry in South America is not as efficient or developed as the oil and gas industry in North America. As a result, our exploration and development activities may take longer to complete and may be more expensive than similar operations in North America. The availability of technical expertise, specific equipment and supplies may be more limited than in North America. We expect that such factors will subject our international operations to economic and operating risks that may not be experienced in North American operations.

Further, we operate in remote areas and may rely on helicopter, boats or other transportation methods. Some of these transport methods may result in increased levels of risk and could lead to operational delays which could effect our ability to add to our reserve base and/or produce oil, serious injury or loss of life and could have a significant impact on our reputation or cash flow. Additionally, some of this equipment is specialized and may be difficult to obtain in our areas of operations, which could hamper or delay operations.

*Exchange Controls and New Taxes Could Materially Affect Our Ability to Fund Our Operations and Realize Profits from Our Foreign Operations.

Foreign operations may require funding if their cash requirements exceed operating cash flow. To the extent that funding is required, there may be exchange controls limiting such funding or adverse tax consequences associated with such funding. In addition, taxes and exchange controls may affect the dividends that we receive from foreign subsidiaries.

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The government in Brazil requires us to register funds that enter and exit the country with the central bank. In Brazil and Colombia, all transactions must be carried out in the local currency of the country. Exchange controls may prevent us from transferring funds abroad.

In Colombia, we participate in a special exchange regime, which allows us to receive revenue in U. S. dollars offshore. This regime gives us flexibility to determine the currency in which we receive our revenues, rather than to be restricted to Colombian pesos if received in Colombia, but also limits the ways in which we are able to fund our operations in Colombia. As such, this could cause us to employ funding strategies for our Colombian operations that are not as tax efficient as might otherwise be if we did not participate in the special exchange regime. 

Tax law changes can impact the after tax profits available for expatriation. For example, the Colombian government has put forward text of its 2014 proposed tax bill that includes two new significant tax changes: an equity tax that would apply an annual 1.5% tax rate to net equity and an increase of 3% in the corporate income tax rate to 37%.  These changes are proposed to apply for the 4-year period 2015-2019, and if enacted could have a material adverse impact on our after tax profits in Colombia over that period. 

*Negative Political Developments in Colombia May Negatively Affect Our Proposed Operations.

Adverse political incidents may generate social unrest which could impact our operations and oil deliveries in Colombia. Peace process negotiations between the government and FARC may not generate the intended outcome for both parties. With the use of arms, and other methods of influence, the FARC may place pressure on organizations and communities that are in areas of operations of the company. These communities, and affiliated organizations, can generate protests to attract the attention of government. These communities may make further use of the Local Court by filing a tutela, or writ of protection, to stop operations in Colombia until such time as these new ethnic communities obtain further consultations and benefits from companies operating in Colombia. Protests or other demonstrations may establish blockades, or the issuance of a tutela by a Local Court, could cause interruptions of operations, deliveries, and other disruptions to our work programs in the affected area.

Negative Political Developments in Peru May Negatively Affect our Proposed Operations.

Peru held a national election in June 2011 after which a new political regime was elected on a left-populist platform. The government has said that the past decade prioritized the strengthening of democracy with economic growth, while the current government will enhance social inclusion to benefit the neediest. This political regime may adopt new policies, laws and regulations that are more hostile toward foreign investment which may result in the imposition of additional taxes, the adoption of regulations that limit price increases, termination of contract rights, or the expropriation of foreign-owned assets. Such actions by the elected political regime could limit the amount of our future revenue in that country and affect our results of operations.

The United States Government May Impose Economic or Trade Sanctions on Colombia That Could Result In a Significant Loss to Us.

Colombia is among several nations whose eligibility to receive foreign aid from the United States is dependent on its progress in stemming the production and transit of illegal drugs, which is subject to an annual review by the President of the United States. Although Colombia is currently eligible for such aid, Colombia may not remain eligible in the future. A finding by the President that Colombia has failed demonstrably to meet its obligations under international counternarcotics agreements may result in any of the following:

• all bilateral aid, except anti-narcotics and humanitarian aid, would be suspended;

• the Export-Import Bank of the United States and the Overseas Private Investment Corporation would not approve financing for new projects in Colombia;

• United States representatives at multilateral lending institutions would be required to vote against all loan requests from Colombia, although such votes would not constitute vetoes; and

• the President of the United States and Congress would retain the right to apply future trade sanctions.

Each of these consequences could result in adverse economic consequences in Colombia and could further heighten the political and economic risks associated with our operations there. Any changes in the holders of significant government offices

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could have adverse consequences on our relationship with ANH and Ecopetrol and the Colombian government’s ability to control guerrilla activities and could exacerbate the factors relating to our foreign operations. Any sanctions imposed on Colombia by the United States government could threaten our ability to obtain necessary financing to develop the Colombian properties or cause Colombia to retaliate against us, including by nationalizing our Colombian assets.

Accordingly, the imposition of the foregoing economic and trade sanctions on Colombia would likely result in a substantial loss and a decrease in the price of shares of our Common Stock. The United States may impose sanctions on Colombia in the future, and we cannot predict the effect in Colombia that these sanctions might cause.

We May not be Able to Effectively Manage Our Growth, Which May Harm Our Profitability.

Our strategy envisions continually expanding our business, both organically and through acquisition of other properties and companies. If we fail to effectively manage our growth or integrate successfully our acquisitions, our financial results could be adversely affected. Growth may place a strain on our management systems and resources. Integration efforts place a significant burden on our management and internal resources. The diversion of management attention and any difficulties encountered in the integration process could harm our business, financial condition and results of operations. In addition, we must continue to refine and expand our business development capabilities, our systems and processes and our access to financing sources. As we grow, we must continue to hire, train, supervise and manage new or acquired employees. We may not be able to:

• expand our systems effectively or efficiently or in a timely manner;

• allocate our human resources optimally;

• identify and hire qualified employees or retain valued employees; or

• incorporate effectively the components of any business that we may acquire in our effort to achieve growth.

If we are unable to manage our growth and our operations our financial results could be adversely affected by inefficiencies, which could diminish our profitability.

We May be Unable to Obtain Additional Capital That We Will Require to Implement Our Business Plan, Which Could Restrict Our Ability to Grow.

We expect that our cash flow from existing operations and cash on hand will be sufficient to fund our currently planned activities. We may require additional capital to expand our exploration and development programs to additional properties. We may be unable to obtain additional capital required.

When we require additional capital, we plan to pursue sources of capital through various financing transactions or arrangements, including joint venturing of projects, debt financing, equity financing or other means. We may not be successful in locating suitable financing transactions in the time period required or at all, and we may not obtain the capital we require by other means. If we do succeed in raising additional capital, future financings may be dilutive to our shareholders, as we could issue additional shares of Common Stock or other equity to investors. In addition, debt and other mezzanine financing may involve a pledge of assets and may be senior to interests of equity holders. We may incur substantial costs in pursuing future capital financing, including investment banking fees, legal fees, accounting fees, securities law compliance fees, printing and distribution expenses and other costs. We may also be required to recognize non-cash expenses in connection with certain securities we may issue, such as convertibles and warrants, which will adversely impact our financial results.

Our ability to obtain needed financing may be impaired by factors such as the capital markets (both generally and in the oil and gas industry in particular), the location of our oil and natural gas properties in South America, prices of oil and natural gas on the commodities markets (which will impact the amount of asset-based financing available to us), and the loss of key management. Further, if oil and/or natural gas prices on the commodities markets decrease, then our revenues will likely decrease, and such decreased revenues may increase our requirements for capital. Some of the contractual arrangements governing our exploration activity may require us to commit to certain capital expenditures, and we may lose our contract rights if we do not have the required capital to fulfill these commitments. If the amount of capital we are able to raise from financing activities, together with our cash flow from operations, is not sufficient to satisfy our capital needs (even to the extent that we reduce our activities), we may be required to curtail our operations.

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Guerrilla Activity in Peru Could Disrupt or Delay Our Operations and We Are Concerned About Safeguarding Our Operations and Personnel in Peru.

The Shining Path Guerilla group has been active in Peru since the early 1980’s and, at one point, was active throughout the country. Recently, the group’s activity has been confined to small areas of Peru and operations have been hampered by the capture of many high profile leaders and membership has fallen dramatically. During April 2012, 30 people working on the Camisea natural gas project in central Peru were kidnapped. Most of the workers were released after a short period of time, and the remainder were freed within a few days. The kidnapping was attributed to the Shining Path Guerilla group. Camisea is a very large, high profile project in an area where the group continues to be active. Our operations in Peru are in a different region, with no known activity by the group. Other groups may be active in other areas of the country and possibly our operational areas. We are monitoring the situation and increasing security measures as required. Nevertheless, we are concerned about the security of our operations in Peru and mitigate our risks through good relationships with local communities and stakeholders as well as strong security procedures.

We are subject to the U.S. Foreign Corrupt Practices Act, a Violation of Which Could Adversely Affect Our Business.

The U.S. Foreign Corrupt Practices Act ("FCPA") and similar anti-bribery laws in other jurisdictions prohibit corporations and individuals, including us and our employees, from making improper payments to non-U.S. officials and certain other individuals and organizations for the purpose of obtaining or retaining business or engaging in certain accounting practices. We do business and may do future business in countries in which we may face, directly or indirectly, corrupt demands by officials, tribal or insurgent organizations, international organizations, or private entities. As a result, we face the risk of unauthorized payments or offers of payments by employees, contractors and agents of ours or our subsidiaries or affiliates, even though these parties are not always subject to our control or direction. It is our policy to implement compliance procedures to prohibit these practices. However, our existing safeguards and any future improvements may prove to be less than effective or may not be followed, and our employees, contractors, agents, and partners may engage in illegal conduct for which we might be held responsible. Also, the FCPA contains certain accounting standards which obligate us to maintain accurate and complete books and records and a system of effective internal controls. These accounting provisions are very broad and a violation can occur even if there is no evidence of a bribe. The U.S. government is actively investigating and enforcing the FCPA and similar laws against companies and individuals. A violation of any of these laws, even if prohibited by our policies, may result in criminal or civil sanctions or other penalties (including profit disgorgement), could disrupt our business and could have a material adverse effect on our business. Actual or alleged violations could damage our reputation, be expensive to investigate and defend, and impair our ability to do business. A number of countries, including Canada, have strengthened their anti-corruption legislation. These laws prohibit both domestic and international bribery. There is a risk that an act of corruption can result in a violation of not only the FCPA, but also the laws of several other countries.

Our Business Could be Negatively Impacted by Security Threats, Including Cybersecurity Threats as Well as Other Disasters, and Related Disruptions.

Our business processes depend on the availability, capacity, reliability and security of our information technology infrastructure and our ability to expand and continually update this infrastructure in response to our changing needs. It is critical to our business that our facilities and infrastructure remain secure. Although we employ data encryption processes, an intrusion detection system, and other internal control procedures to assure the security of our data, we cannot guarantee that these measures will be sufficient for this purpose. The ability of the information technology function to support our business in the event of a security breach or a disaster such as fire or flood and our ability to recover key systems and information from unexpected interruptions cannot be fully tested and there is a risk that, if such an event actually occurs, we may not be able to address immediately the repercussions of the breach or disaster. In that event, key information and systems may be unavailable for a number of days or weeks, leading to our inability to conduct business or perform some business processes in a timely manner. We have implemented strategies to mitigate impacts from these types of events.

We have expended significant time and money on the security of our facilities and on our information technology infrastructure including testing of our security at our facilities and infrastructure. If our security measures are breached as a result of third-party action, employee error or otherwise, and as a result our data becomes available to unauthorized parties, we may lose our competitive edge in certain of our business activities and our reputation may be damaged. If we experience any breaches of our network security or sabotage, we might be required to expend significant capital and other resources to remedy, protect against or alleviate these and related problems, and we may not be able to remedy these problems in a timely manner, or at all. Because techniques used by outsiders to obtain unauthorized network access or to sabotage systems change frequently and generally are not recognized until launched against a target, we may be unable to anticipate these techniques or implement adequate preventative measures. 

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We have had past security breaches to our infrastructure, and, although they did not have a material adverse effect on our operations or our operating results, there can be no assurance of a similar result in the future. Our employees have been and will continue to be targeted by parties using fraudulent “spoof” and “phishing” emails to misappropriate information or to introduce viruses or other malware through “trojan horse” programs to our computers. These emails appear to be legitimate emails sent by us but direct recipients to fake websites operated by the sender of the email or request that the recipient send a password or other confidential information through email or download malware. Despite our efforts to mitigate “spoof” and “phishing” emails through education, “spoof” and “phishing” activities remain a serious problem that may damage our information technology infrastructure.

Risks Related to Our Industry

Unless We Are Able to Replace Our Reserves, and Develop and Manage Oil and Gas Reserves and Production on an Economically Viable Basis, Our Reserves, Production and Cash Flows May Decline as a Result.

Our future success depends on our ability to find, develop and acquire additional oil and gas reserves that are economically recoverable. Without successful exploration, development or acquisition activities, our reserves and production will decline. We may not be able to find, develop or acquire additional reserves at acceptable costs.

To the extent that we succeed in discovering oil and/or natural gas, reserves may not be capable of production levels we project or in sufficient quantities to be commercially viable. On a long-term basis, our viability depends on our ability to find or acquire, develop and commercially produce additional oil and gas reserves. Without the addition of reserves through exploration, acquisition or development activities, our reserves and production will decline over time as reserves are produced. Our future reserves will depend not only on our ability to develop and effectively manage then-existing properties, but also on our ability to identify and acquire additional suitable producing properties or prospects, to find markets for the oil and natural gas we develop and to effectively distribute our production into our markets. Future oil and gas exploration may involve unprofitable efforts, not only from dry wells, but from wells that are productive but do not produce sufficient net revenues to return a profit after drilling, operating and other costs. Completion of a well does not assure a profit on the investment or recovery of drilling, completion and operating costs. In addition, drilling hazards or environmental damage could greatly increase the cost of operations, and various field operating conditions may adversely affect the production from successful wells. These conditions include delays in obtaining governmental approvals or consents, shut-downs of connected wells resulting from extreme weather conditions, problems in storage and distribution and adverse geological and technical conditions. While we will endeavor to effectively manage these conditions, we may not be able to do so optimally, and we will not be able to eliminate them completely in any case. Therefore, these conditions could diminish our revenue and cash flow levels and result in the impairment of our oil and natural gas interests.

*We Are Required to Obtain Licenses and Permits to Conduct Our Business and Failure to Obtain These Licenses Could Cause Significant Delays and Expenses That Could Materially Impact Our Business.

We are subject to licensing and permitting requirements relating to exploring and drilling for and development of oil and natural gas, including seismic, environmental and many other operating permits. We may not be able to obtain, sustain or renew such licenses and permits on a timely basis or at all. For example, the permitting process in Peru takes significant time, meaning that exploration and development projects have a longer cycle time to completion than they might elsewhere. In Colombia, other drilling and development projects are being delayed, most significantly our Moqueta field development, because of delays at the Ministry of the Environment and other government departments. During the third quarter 2014, we received the Exploitation License for the Moqueta field, however delays in receiving it contributed to operational delays and higher development costs. In addition, environmental and social evaluation demands have increased in Colombia, causing permit processing to take longer than previously experienced in the areas where we operate and, in some areas where we operate, such as the Department of Putumayo, despite the receipt of the proper permits, there are new procedures being utilized by new ethnic communities to make further economic demands on operators to continue to operate in the region, such as the use of the Local Court to obtain a tutela, or writ of protection. These delays and demands are also significantly impacting other industry participants. Regulations and policies relating to these licenses and permits may change, be implemented in a way that we do not currently anticipate or take significantly greater time to obtain. These licenses and permits are subject to numerous requirements, including compliance with the environmental regulations of the local governments. As we are not the operator of all the joint ventures we are currently involved in, we may rely on the operator to obtain all necessary permits and licenses. If we fail to comply with these requirements, we could be prevented from drilling for oil and natural gas, and we could be subject to civil or criminal liability or fines. Revocation or suspension of our environmental and operating permits could have a material adverse effect on our business, financial condition and results of operations. For example, currently in Brazil, we are subject to restrictions on flaring natural gas, which have the impact of limiting our production capacity. We have examined

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other alternatives for producing and delivering the gas, however, however, to date, we have not been able to successfully implement any of these alternatives.

Our Exploration for Oil and Natural Gas Is Risky and May Not Be Commercially Successful, Impairing Our Ability to Generate Revenues from Our Operations.

Oil and natural gas exploration involves a high degree of risk. These risks are more acute in the early stages of exploration. Our exploration expenditures may not result in new discoveries of oil or natural gas in commercially viable quantities or at a commercially viable cost. It is difficult to project the costs of implementing an exploratory drilling program due to the inherent uncertainties of drilling in unknown formations, the costs associated with encountering various drilling conditions, such as over pressured zones and tools lost in the hole, and changes in drilling plans and locations as a result of prior exploratory wells or additional seismic data and interpretations thereof. For example, in January 2014, the Corunta-1 exploration well on the west flank of the Moqueta field encountered drilling problems prior to reaching the reservoir target on this long-reach deviated well, and the decision was made to abandon the well. The target location may be drilled again in the future with a revised drilling plan. If exploration costs exceed our estimates, or if our exploration efforts do not produce results which meet our expectations, our exploration efforts may not be commercially successful, which could adversely impact our ability to generate revenues from our operations.

Our Inability to Obtain Necessary Facilities and/or Equipment Could Hamper Our Operations.

Oil and natural gas exploration and development activities are dependent on the availability of drilling and related equipment, transportation, power and technical support in the particular areas where these activities will be conducted, and our access to these facilities may be limited. To the extent that we conduct our activities in remote areas, needed facilities or equipment may not be proximate to our operations, which will increase our expenses. For example, our development and exploration projects in Peru are in remote areas that require barge and helicopter transportation which adds dramatically to the cost of these operations. Demand for such limited equipment and other facilities or access restrictions may affect the availability of such equipment to us and may delay exploration and development activities. The quality and reliability of necessary facilities or equipment may also be unpredictable and we may be required to make efforts to standardize our facilities, which may entail unanticipated costs and delays. Shortages and/or the unavailability of necessary equipment, transportation or other facilities will impair our activities, either by delaying our activities, increasing our costs or otherwise.

Estimates of Oil and Natural Gas Reserves That We Make May be Inaccurate and Our Actual Revenues May be Lower and Our Operating Expenses May be Higher Than Our Financial Projections.

We make estimates of oil and natural gas reserves, upon which we will base our financial projections. We make these reserve estimates using various assumptions, including assumptions as to oil and natural gas prices, drilling and operating expenses, capital expenditures, taxes and availability of funds. Some of these assumptions are inherently subjective, and the accuracy of our reserve estimates relies in part on the ability of our management team, engineers and other advisors to make accurate assumptions. Economic factors beyond our control, such as interest rates and exchange rates, will also impact the value of our reserves. The process of estimating oil and gas reserves is complex, and will require us to use significant decisions and assumptions in the evaluation of available geological, geophysical, engineering and economic data for each property. As a result, our reserve estimates will be inherently imprecise. Actual future production, oil and natural gas prices, revenues, taxes, development expenditures, operating expenses and quantities of recoverable oil and gas reserves may vary substantially from those we estimate. If actual production results vary substantially from our reserve estimates, this could materially reduce our revenues and result in the impairment of our oil and natural gas interests.

Exploration, development, production (including transportation and workover costs), marketing (including distribution costs) and regulatory compliance costs (including taxes) will substantially impact the net revenues we derive from the oil and gas that we produce. These costs are subject to fluctuations and variation in different locales in which we operate, and we may not be able to predict or control these costs. If these costs exceed our expectations, this may adversely affect our results of operations. In addition, we may not be able to earn net revenue at our predicted levels, which may impact our ability to satisfy our obligations.

*If Oil and Natural Gas Prices Decrease, We May be Required to Take Write-Downs of the Carrying Value of Our Oil and Natural Gas Properties.

We follow the full cost method of accounting for our oil and gas properties. A separate cost center is maintained for expenditures applicable to each country in which we conduct exploration and/or production activities. Under this method, the net book value of properties on a country-by-country basis, less related deferred income taxes, may not exceed a calculated

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“ceiling”. The ceiling is the estimated after tax future net revenues from proved oil and gas properties, discounted at 10% per year. In calculating discounted future net revenues, oil and natural gas prices are determined using the average price during the 12 months period prior to the ending date of the period covered by the balance sheet, calculated as an unweighted arithmetic average of the first-day-of-the month price for each month within such period for that oil and natural gas. That average price is then held constant, except for changes which are fixed and determinable by existing contracts. The net book value is compared with the ceiling on a quarterly basis. The excess, if any, of the net book value above the ceiling is required to be written off as an expense. Under full cost accounting rules, any write-off recorded may not be reversed even if higher oil and natural gas prices increase the ceiling applicable to future periods. Future price decreases could result in reductions in the carrying value of such assets and an equivalent charge to earnings. In countries where we do not have proved reserves, dry wells drilled in a period would directly result in ceiling test impairment for that period.

In 2012, we recorded a ceiling test impairment loss of $20.2 million in our Brazil cost center related to seismic and drilling costs on Block BM-CAL-10. The farm-out agreement for that block terminated during the first quarter of 2012 when we provided notice that we would not enter into the second exploration period. In 2013, we recorded a $2.0 million ceiling test impairment loss in our Brazil cost center related to lower realized prices and an increase in operating costs.

Drilling New Wells and Producing Oil and Natural Gas From Existing Facilities Could Result in New Liabilities, Which Could Endanger Our Interests in Our Properties and Assets.

There are risks associated with the drilling of oil and natural gas wells, including encountering unexpected formations or pressures, premature declines of reservoirs, blow-outs, craterings, sour gas releases, fires and spills. Earthquakes or weather related phenomena such as heavy rain, landslides, storms and hurricanes can also cause problems in drilling new wells. There are also risks in producing oil and natural gas from existing facilities. For example, in January 2014, the Corunta-1 exploration well on the west flank of the Moqueta field encountered drilling problems prior to reaching the reservoir target on this long-reach deviated well, and the decision was made to abandon the well. The target location may be drilled again in the future with a revised drilling plan. The occurrence of any of these events could significantly reduce our revenues or cause substantial losses, impairing our future operating results. We may become subject to liability for pollution, blow-outs or other hazards. Incidents such as these can lead to serious injury, property damage and even loss of life. We generally obtain insurance with respect to these hazards, but such insurance has limitations on liability that may not be sufficient to cover the full extent of such liabilities. The payment of such liabilities could reduce the funds available to us or could, in an extreme case, result in a total loss of our properties and assets. Moreover, we may not be able to maintain adequate insurance in the future at rates that are considered reasonable. Oil and natural gas production operations are also subject to all the risks typically associated with such operations, including premature decline of reservoirs and the invasion of water into producing formations.

*Prices and Markets for Oil and Natural Gas Are Unpredictable and Tend to Fluctuate Significantly, Which Could Reduce Our Profitability, Growth and Value.

Oil and natural gas are commodities whose prices are determined based on world demand, supply and other factors, all of which are beyond our control. World prices for oil and natural gas have fluctuated widely in recent years. The average price for West Texas Intermediate ("WTI") per bbl has varied from $66 in 2006 to $98 in 2013, and $99 in the nine months ended September 30, 2014, demonstrating the inherent volatility in the market. The average Brent oil price per bbl was $111 in 2011, $112 in 2012, $109 in 2013 and $106.56 in the nine months ended September 30, 2014. Given the current economic environment and unstable conditions in the Middle East, North Africa, the United States and Europe, the oil price environment is unpredictable and unstable. We expect that prices will fluctuate in the future. Price fluctuations will have a significant impact upon our revenue, the return from our oil and gas reserves and on our financial condition generally. Price fluctuations for oil and natural gas commodities may also impact the investment market for companies engaged in the oil and gas industry. Furthermore, prices which we receive for our oil sales, while based on international oil prices, are established by contract with purchasers with prescribed deductions for transportation and quality differentials. These differentials can change over time and have a detrimental impact on realized prices. Future decreases in the prices of oil and natural gas may have a material adverse effect on our financial condition, the future results of our operations and quantities of reserves recoverable on an economic basis.

Oil prices in Colombia are related to international market prices, but adjustments that are defined by contracts with offtakers may cause realized prices to be lower or higher than those received in North America. Oil prices in Brazil are defined by contract with the refinery and may be lower or higher than those received in North America.

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Environmental Risks May Adversely Affect Our Business.

All phases of the oil and natural gas business present environmental risks and hazards and are subject to environmental regulation pursuant to a variety of international conventions and federal, provincial and municipal laws and regulations. Environmental legislation provides for, among other things, restrictions and prohibitions on spills, releases or emissions of various substances produced in association with oil and gas operations. The legislation also requires that wells and facility sites be operated, maintained, abandoned and reclaimed to the satisfaction of applicable regulatory authorities. Compliance with such legislation can require significant expenditures and a breach may result in the imposition of fines and penalties, some of which may be material. Environmental legislation is evolving in a manner we expect may result in stricter standards and enforcement, larger fines and liability and potentially increased capital expenditures and operating costs. The discharge of oil, natural gas or other pollutants into the air, soil or water may give rise to liabilities to foreign governments and third parties and may require us to incur costs to remedy such discharge. The application of environmental laws to our business may cause us to curtail our production or increase the costs of our production, development or exploration activities.

Decommissioning Costs Are Unknown and May be Substantial; Unplanned Costs Could Divert Resources from Other Projects.

We are responsible for costs associated with abandoning and reclaiming some of the wells, facilities and pipelines which we use for production of oil and gas reserves. Abandonment and reclamation of these facilities and the costs associated therewith is often referred to as “decommissioning.” We have determined that we require a reserve account for these potential costs in respect of our current properties and facilities at this time, and have booked such reserve on our financial statements. If decommissioning is required before economic depletion of our properties or if our estimates of the costs of decommissioning exceed the value of the reserves remaining at any particular time to cover such decommissioning costs, we may have to draw on funds from other sources to satisfy such costs. The use of other funds to satisfy decommissioning costs could impair our ability to focus capital investment in other areas of our business.

Penalties We May Incur Could Impair Our Business.

Our exploration, development, production and marketing operations are regulated extensively under foreign, federal, state and local laws and regulations. Under these laws and regulations, we could be held liable for personal injuries, property damage, site clean-up and restoration obligations or costs and other damages and liabilities. We may also be required to take corrective actions, such as installing additional safety or environmental equipment, which could require us to make significant capital expenditures. Failure to comply with these laws and regulations may also result in the suspension or termination of our operations and subject us to administrative, civil and criminal penalties, including the assessment of natural resource damages. We could be required to indemnify our employees in connection with any expenses or liabilities that they may incur individually in connection with regulatory action against them. As a result of these laws and regulations, our future business prospects could deteriorate and our profitability could be impaired by costs of compliance, remedy or indemnification of our employees, reducing our profitability.

Policies, Procedures and Systems to Safeguard Employee Health, Safety and Security May Not be Adequate.

Oil and natural gas exploration and production is dangerous. Detailed and specialized policies, procedures and systems are required to safeguard employee health, safety and security. We have undertaken to implement best practices for employee health, safety and security; however, if these policies, procedures and systems are not adequate, or employees do not receive adequate training, the consequences can be severe including serious injury or loss of life, which could impair our operations and cause us to incur significant legal liability.

Our Insurance May be Inadequate to Cover Liabilities We May Incur.

Our involvement in the exploration for and development of oil and natural gas properties may result in our becoming subject to liability for pollution, blowouts, property damage, personal injury or other hazards. Although we have insurance in accordance with industry standards to address such risks, such insurance has limitations on liability that may not be sufficient to cover the full extent of such liabilities. In addition, such risks may not in all circumstances be insurable or, in certain circumstances, we may choose not to obtain insurance to protect against specific risks due to the high premiums associated with such insurance or for other reasons. The payment of such uninsured liabilities would reduce the funds available to us. If we suffer a significant event or occurrence that is not fully insured, or if the insurer of such event is not solvent, we could be required to divert funds from capital investment or other uses towards covering our liability for such events.

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Challenges to Our Properties May Impact Our Financial Condition.

Title to oil and natural gas interests is often not capable of conclusive determination without incurring substantial expense. While we intend to make appropriate inquiries into the title of properties and other development rights we acquire, title defects may exist. In addition, we may be unable to obtain adequate insurance for title defects, on a commercially reasonable basis or at all. If title defects do exist, it is possible that we may lose all or a portion of our right, title and interest in and to the properties to which the title defects relate.

Furthermore, applicable governments may revoke or unfavorably alter the conditions of exploration and development authorizations that we procure, or third parties may challenge any exploration and development authorizations we procure. Such rights or additional rights we apply for may not be granted or renewed on terms satisfactory to us.

If our property rights are reduced, whether by governmental action or third party challenges, our ability to conduct our exploration, development and production may be impaired. See the risk factor "Disputes or Uncertainties May Arise in Relation to Our Royalty Obligations" for a description of our dispute with the ANH regarding royalties payable on our Chaza Block and the resulting challenge to our contract for that block.

We Will Rely on Technology to Conduct Our Business and Our Technology Could Become Ineffective or Obsolete.

We rely on technology, including geographic and seismic analysis techniques and economic models, to develop our reserve estimates and to guide our exploration and development and production activities. We will be required to continually enhance and update our technology to maintain its efficacy and to avoid obsolescence. The costs of doing so may be substantial, and may be higher than the costs that we anticipate for technology maintenance and development. If we are unable to maintain the efficacy of our technology, our ability to manage our business and to compete may be impaired. Further, even if we are able to maintain technical effectiveness, our technology may not be the most efficient means of reaching our objectives, in which case we may incur higher operating costs than we would were our technology more efficient.

Risks Related to Our Common Stock

The Market Price of Our Common Stock May be Highly Volatile and Subject to Wide Fluctuations.

The market price of shares of our Common Stock may be highly volatile and could be subject to wide fluctuations in response to a number of factors that are beyond our control, including but not limited to:

• dilution caused by our issuance of additional shares of Common Stock and other forms of equity securities, which we expect to make in connection with acquisitions of other companies or assets;

• announcements of new acquisitions, reserve discoveries or other business initiatives by our competitors;

• fluctuations in revenue from our oil and natural gas business;

• changes in the market and/or WTI or Brent price for oil and natural gas commodities and/or in the capital markets generally, or under our credit agreement;

• changes in the demand for oil and natural gas, including changes resulting from the introduction or expansion of alternative fuels;

• changes in the social, political and/or legal climate in the regions in which we will operate;

• changes in the valuation of similarly situated companies, both in our industry and in other industries;

• changes in analysts’ estimates affecting us, our competitors and/or our industry;

• changes in the accounting methods used in or otherwise affecting our industry;

• announcements of technological innovations or new products available to the oil and natural gas industry; 

• announcements by relevant governments pertaining to incentives for alternative energy development programs;

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• fluctuations in interest rates, exchange rates and the availability of capital in the capital markets; and

• significant sales of shares of our Common Stock, including sales by future investors in future offerings we expect to make to raise additional capital.

In addition, the market price of shares of our Common Stock could be subject to wide fluctuations in response to various factors, which could include the following, among others:

• quarterly variations in our revenues and operating expenses; and

• additions and departures of key personnel.

These and other factors are largely beyond our control, and the impact of these risks, singularly or in the aggregate, may result in material adverse changes to the market price of shares of our Common Stock and/or our results of operations and financial condition.

We do not Expect to Pay Dividends in the Foreseeable Future.

We do not intend to declare dividends for the foreseeable future, as we anticipate that we will reinvest any future earnings in the development and growth of our business. Therefore, investors will not receive any funds unless they sell their shares of Common Stock, and shareholders may be unable to sell their shares on favorable terms or at all. Investors cannot be assured of a positive return on investment or that they will not lose the entire amount of their investment in shares of our Common Stock.

Item 6. Exhibits

See Index to Exhibits at the end of this Report, which is incorporated by reference here. The Exhibits listed in the accompanying Index to Exhibits are filed as part of this report.

SIGNATURES

Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned thereunto duly authorized.

GRAN TIERRA ENERGY INC.

Date: November 5, 2014	/s/ Dana Coffield
	By: Dana Coffield
	Chief Executive Officer and President
	(Principal Executive Officer)

Date: November 5, 2014	/s/ James Rozon
	By: James Rozon
	Chief Financial Officer
	(Principal Financial and Accounting Officer)

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EXHIBIT INDEX

Exhibit No.	Description	Reference
2.1	Arrangement Agreement, dated as of July 28, 2008, by and among Gran Tierra Energy Inc., Solana Resources Limited and Gran Tierra Exchangeco Inc.	Incorporated by reference to Exhibit 2.1 to the Current Report on Form 8-K, filed with the SEC on August 1, 2008 (SEC File No. 001-34018).
2.2	Amendment No. 2 to Arrangement Agreement, which supersedes Amendment No. 1 thereto and includes the Plan of Arrangement, including appendices.	Incorporated by reference to Exhibit 2.2 to the Registration Statement on Form S-3, filed with the SEC on October 10, 2008 (SEC File No. 333-153376).
2.3	Arrangement Agreement, dated January 17, 2011, by and between Gran Tierra Energy Inc. and Petrolifera Petroleum Limited. +	Incorporated by reference to Exhibit 2.1 to the Current Report on Form 8-K, filed with the SEC on January 21, 2011 (SEC File No. 001-34018).
2.4	Share Purchase and Sale Offer, dated May 29, 2014, by Gran Tierra Petroco Inc. +	Incorporated by reference to Exhibit 2.1 to the Quarterly Report on Form 10-Q, filed with the SEC on July 1, 2014 (SEC File No. 001-34018).
2.5	Share Purchase and Sale Offer, dated May 29, 2014, by Gran Tierra Energy Inc., an Alberta corporation, and PCESA Petroleros Canadienses De Ecuador S.A. +	Incorporated by reference to Exhibit 2.2 to the Quarterly Report on Form 10-Q, filed with the SEC on July 1, 2014 (SEC File No. 001-34018).
3.1	Amended and Restated Articles of Incorporation.	Incorporated by reference to Exhibit 3.1 to the Annual Report on Form 10-K, filed with the SEC on February 26, 2014 (SEC File No. 001-34018).
3.2	Amended and Restated Bylaws of Gran Tierra Energy Inc.	Incorporated by reference to Exhibit 3.1 to the Current Report on Form 8-K, filed with the SEC on February 26, 2014 (SEC File No. 001-34018).
4.1	Reference is made to Exhibits 3.1 to 3.2.
4.2	Details of the Goldstrike Special Voting Share.	Incorporated by reference to Exhibit 10.14 to the Annual Report on Form 10-KSB/A for the period ended December 31, 2005, and filed with the SEC on April 21, 2006 (SEC File No. 333-111656).
4.3	Goldstrike Exchangeable Share Provisions.	Incorporated by reference to Exhibit 10.15 to the Annual Report on Form 10-KSB/A for the period ended December 31, 2005, and filed with the SEC on April 21, 2006 (SEC File No. 333-111656).
4.4	Provisions Attaching to the GTE–Solana Exchangeable Shares.	Incorporated by reference to Annex E to the Proxy Statement on Schedule 14A filed with the SEC on October 14, 2008 (SEC File No. 001-34018).
10.1	Retirement Executive Employment Agreement dated August 18, 2014, between Gran Tierra Energy Canada ULC, Gran Tierra Energy Inc. and Shane O'Leary.	Filed herewith.
10.2	Executive Employment Agreement dated July 31, 2014, between Gran Tierra Energy Canada ULC, Gran Tierra Energy Inc. and Duncan Nightingale.	Incorporated by reference to Exhibit 10.3 to the Quarterly Report on Form 10-Q, filed with the SEC on August 7, 2014 (SEC File No. 001-34018).
10.3	Employment Agreement dated July 31, 2014, between Gran Tierra Energy Colombia Ltd. and Adrián Santiago Coral Pantoja.	Incorporated by reference to Exhibit 10.4 to the Quarterly Report on Form 10-Q, filed with the SEC on August 7, 2014 (SEC File No. 001-34018).
10.4	Amendment to Crude Oil Transportation Agreement for the Mansoyá - Orito pipeline, dated as of September 19, 2014, between Gran Tierra Energy Colombia Ltd. and Cenit Transporte y Logística de Hidrocarburos S.A.S.	Filed herewith.

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10.5	Amendment to Crude Oil Transportation Agreement for the Mansoyá - Orito pipeline, dated as of September 19, 2014, between Petrolifera Petroleum (Colombia) Ltd. and Cenit Transporte y Logística de Hidrocarburos S.A.S.	Filed herewith.
10.6	Amendment to Crude Oil Transportation Agreement for the Orito - Tumaco Pipeline pipeline, dated as of September 19, 2014, between Gran Tierra Energy Colombia Ltd. and Cenit Transporte y Logística de Hidrocarburos S.A.S.	Filed herewith.
10.7	Amendment to Crude Oil Transportation Agreement for the Orito - Tumaco Pipeline pipeline, dated as of September 19, 2014, between Petrolifera Petroleum (Colombia) Ltd. and Cenit Transporte y Logística de Hidrocarburos S.A.S.	Filed herewith.
10.8	Consulting Agreement dated September 11, 2014, between Gran Tierra Energy Canada ULC, Gran Tierra Energy Inc. and Shane O'Leary.	Filed herewith.
10.9	Amendment to Costayaco Oil Sale and Purchase Agreement, dated as of October 7, 2014, between Gran Tierra Energy Colombia Ltd. and Gunvor Colombia CI S.A.S.	Filed herewith.
10.10	Amendment to Costayaco Oil Sale and Purchase Agreement, dated as of October 7, 2014, between Petrolifera Petroleum (Colombia) Ltd. and Gunvor Colombia CI S.A.S.	Filed herewith.
10.11	Amendment to agreement between Gran Tierra Energy Colombia, Ltd and Ecopetrol S.A., dated October 9, 2014, with respect to the sale of crude oil from the Chaza, Santana and Guayuyaco Blocks.	Filed herewith.
10.12	Amendment to agreement between Petrolifera Petroleum (Colombia) Ltd. and Ecopetrol S.A., dated October 9, 2014, with respect to the sale of crude oil from the Chaza, Santana and Guayuyaco Blocks.	Filed herewith.
31.1	Certification of Principal Executive Officer.	Filed herewith.
31.2	Certification of Principal Financial Officer.	Filed herewith.
32.1	Section 1350 Certifications.	Filed herewith.

101.INS  XBRL Instance Document

101.SCH  XBRL Taxonomy Extension Schema Document

101.CAL  XBRL Taxonomy Extension Calculation Linkbase Document

101.DEF XBRL Taxonomy Extension Definition Linkbase Document

101.LAB  XBRL Taxonomy Extension Label Linkbase Document

101.PRE  XBRL Taxonomy Extension Presentation Linkbase Document

+ Schedules have been omitted pursuant to Item 601(b)(2) of Regulation S-K. Gran Tierra undertakes to furnish supplemental copies of any of the omitted schedules upon request by the SEC.

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EX-10.1

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Exhibit 10.1

Retirement Agreement

This Agreement entered into as of the 18th day of August, 2014.

Between:

GRAN TIERRA ENERGY CANADA ULC., a company carrying on business in the Province of Alberta

(the "Company")

- and -

GRAN TIERRA ENERGY INC., a Nevada company, the ultimate parent entity of the Company

(the "Parent")

- and -

SHANE P. O’LEARY, an individual residing in the Province of Alberta

(the "Executive")

WHEREAS:

A. The Executive has been employed pursuant to the Prior Agreement and acted as Chief Operating Officer of the Parent;

B. The Executive has stated his intention to cease to act as Chief Operating Officer of the Parent and, subsequently, to cease to be an employee as set forth herein; and

C. The Executive and the Company wish to set forth their entire understanding and agreement with respect to the subject matter herein.

IN CONSIDERATION of the mutual covenants and agreements contained herein and other good and valuable consideration, the receipt and sufficiency of which are acknowledged by the parties hereto, the parties agree as follows:

1. Definitions

In addition to the terms defined within this Agreement:

"Agreement" means this Retirement Agreement;

"Applicable Laws" means, in relation to this Agreement, all applicable provisions of laws, statutes, rules, regulations, official directives and orders of and the terms of all judgments, orders and decrees

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issued by any authorized authority by which such person is bound or having application to this Agreement;

"Consulting Term” means a period starting on the Effective Date and continuing until December 31, 2014, and such additional period, not to exceed an additional three months, as may be agreed between the Executive and the Company;

"Continuous Service” has the meaning ascribed to such term in the Plan;

"Dollars” or "$” means Canadian dollars, the lawful currency of Canada;

"Effective Date" means 12:00 midnight on September 30, 2014;

"Plan” means the 2007 Equity Incentive Plan of the Parent; and

"Prior Agreement" means that certain Executive Employment Agreement among the Executive, the Company (as assignee of Gran Tierra Energy Inc., an Alberta corporation) and the Parent dated January 26, 2009, and all amendments thereto.

2. Retirement of the Executive

Effective as of August 31, 2014, the Executive will cease to hold the position of Chief Operating Officer of the Parent. During the period from August 31, 2014, until the Effective Date the Executive shall continue to be an employee and shall act as an advisor to the Chief Operating Officer of the Parent and perform such duties as may be reasonably assigned by the President and Chief Executive Officer. As of the Effective Date, the Executive will retire and the Executive’s employment pursuant to the Prior Agreement will terminate. It is acknowledged that such termination of employment is a voluntary resignation by the Executive pursuant to Section 9.1(a) of the Prior Agreement and the only compensation or benefits whatsoever the Executive is entitled to with respect to such termination are those set out in Sections 3 and 4 of this Agreement.

3. Provision of Consulting Services by the Executive

During the Consulting Term, the Executive will be engaged as a consultant to the Company pursuant to a consulting agreement in the Company’s standard form (which shall include the requirement to comply with the Parent’s corporate policies) and shall provide services to the Company on an as requested basis at a rate of $225.00 for each hour that the Executive provides such services. As provided pursuant to the terms of the Plan, the Executive’s transition as at the Effective Date from an employee under the Prior Agreement to a consultant under the said consulting agreement shall not terminate the Executive’s Continuous Service.

4. Payments and Benefits to be received by the Executive

(a) On December 31, 2014, the following awards previously granted to Executive pursuant to the Plan (which would have vested in the two years following that date) shall vest:

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Nature of Award	Grant Date	Number of Units	Strike Price
Stock Option	29-Feb-12	91,667	USD$5.83
Stock Option	08-May-13	100,000	USD$6.28
Stock Option	28-Feb-14	143,333	USD$7.09
Restricted Stock Unit	02-May-13	33,334	n/a
Restricted Stock Unit	06-Feb-14	53,333	n/a

All vested stock options held by the Executive at the termination of his Continuous Service shall expire three months after such termination in accordance with the terms of the Plan. The Restricted Stock Units that vest on December 31, 2014 shall be settled in accordance with the Plan on or before January 9, 2015.

(b) The Executive shall receive a bonus payment for his service during 2014 equivalent to 100% of his target bonus amount, pro-rated to the Effective Date, in the amount of $237,600.00. Such bonus will be paid to the Executive on or before October 15, 2015.

5. Final Release

The obligations of the Company and the Parent pursuant to Sections 3 and 4 of this Agreement are conditional on the Executive executing a release in a form substantially similar to the form attached to this Agreement as Schedule “A”.

6. Enforceability

If any covenant or provision of this Agreement is determined to be void or unenforceable in whole or in part, for any reason, it shall be deemed not to affect or impair the validity of any other covenant or provision of this Agreement, which shall remain in full force and effect.

7. Applicable Law

This Agreement shall be construed and enforced in accordance with the laws of the Province of Alberta. The parties hereby attorn to the exclusive jurisdiction of the courts of the Province of Alberta in order to settle any disputes arising from or relating to this Agreement.

8. Waiver

No failure or delay by any party in exercising any right, power or privilege under this Agreement will operate as a waiver of those rights, powers or privileges, nor will any waiver in one instance be deemed to be a continuing waiver in any other instance.

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9. Notice

Any notices or other communications required or permitted to be sent hereunder shall be in writing and shall be duly given if personally delivered or sent via courier, if to the Executive at:

Shane P. O’Leary

4007 – 5^th Street S.W.

Calgary, Alberta

T2S 2C9

and if to the Company at:

300, 625 11th Avenue S.W.

Calgary AB, T2R 0E1

ATTN: President and Chief Executive Officer

Either party may change their address for the sending of notice to such party by written notice to the other party sent in accordance with the provisions hereof.

10. Entire Agreement

This Agreement constitutes the entire agreement between the parties with respect to the subject matter addressed herein, and, with respect to the subject matter of this Agreement, supersedes and replaces any and all prior agreements, including the Prior Agreement, and any and all prior undertakings, representations or negotiations. The parties agree that they have not relied upon any verbal statements, representations, warranties or undertakings in entering into this Agreement. For certainty, it is acknowledged that Articles 10 and 11 of the Prior Agreement continue in full force and effect in accordance with the terms of the Prior Agreement. For certainty, it is acknowledged that notwithstanding Article 10.2 of the Prior Agreement, the Executive and the Executive’s heirs, executors, administrators and other legal representatives, will be entitled to the benefit of directors’ and officers’ liability insurance that is, at all times, at least equal to any directors’ and officers’ liability insurance coverage that the Parent or any of its direct or indirect subsidiaries purchases and maintains for the benefit of former directors and officers who ceased to be a director or officer on or before the date of the termination of the Executive’s employment.

11. Amendment

No provision of this Agreement may be modified or waived unless the Executive and the Company agree to such modification or waiver in writing.

12. Execution

This Agreement may be executed in counterparts, each of which shall be an original and all of which together shall constitute one and the same instrument.

13. Withholdings

All amounts payable by the Company under this Agreement are subject to any and all withholdings by the Company as required by Applicable Law. The Company shall remit all withholdings required by Applicable Law in accordance with its regular payroll practices. In any event, the Executive

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shall be responsible for payment of any and all taxes in respect of any payments or benefits provided in this Agreement.

14. Enurement

This Agreement will enure to the benefit of and be binding upon the parties and their respective heirs, executors, administrators, permitted successors and permitted assigns.

15. Independent Legal Advice

The parties to this Agreement each acknowledge that they have not relied upon the other party to this Agreement for advice, whether legal or otherwise, in connection with this Agreement and the parties further acknowledge that they have each been advised and provided with a sufficient opportunity to seek independent legal advice with respect to the same.

IN WITNESS WHEREOF the parties hereto acknowledge and agree that they have read and understand the terms of this Agreement, and that they have had the opportunity to obtain independent legal advice prior to entering into this Agreement, and that they have executed this Agreement with full force and effect from the date first written above.

GRAN TIERRA ENERGY CANADA ULC. Per: /s/ Dana Coffield                                Name: Dana Coffield Title: President and Chief Executive Officer	GRAN TIERRA ENERGY INC. Per: /s/ Dana Coffield                                Name: Dana Coffield Title: President and Chief Executive Officer
/s/ C. Cuthiell	/s/ Shane O’Leary
Witness (Signature)	SHANE P. O’LEARY
“Cathy Cuthiell”
Witness (Print Name)

Schedule "A"

FINAL RELEASE

I, SHANE P. O’LEARY, of the City of Calgary, in the Province of Alberta, in consideration of the mutual covenants and agreements set forth in the Retirement Agreement, dated as of the 18th day of August, 2014, among me, GRAN TIERRA ENERGY CANADA ULC. (the "Company") and GRAN TIERRA ENERGY INC. (the "Parent"), and for other good and valuable consideration, the receipt and sufficiency of which are hereby acknowledged, do for myself, my heirs, executors, administrators and assigns, hereby remise, release and forever discharge the Company, its affiliated entities (the "Affiliates"), including but not limited to the Parent, and each of their former, present and future affiliates, officers, directors, trustees, employees, agents, representatives and assigns (collectively, the "Releasees") from any and all actions, causes of action, suits, claims, demands, covenants, obligations, contracts, liabilities, debts, duties, costs and damages, whether absolute or contingent and of any nature whatsoever which I may now have or hereafter can, shall or may have against the Releasees or any of them, by reason of or arising out of any cause, matter or thing whatsoever done, occurring or existing up to and including the present date and, in particular, without in any way restricting the generality of the foregoing, in respect of all claims of any nature whatsoever, past, present or future, directly or indirectly related to or arising out of or in connection to my relationship with the Releasees, my status as an employee of the Company, or the cessation of my employment with the Company, including but not limited to any claims related to any entitlement I may have or may have had to any payment or claim either at common law or under that certain Executive Employment Agreement among me, the Company (as assignee of Gran Tierra Energy Inc., an Alberta corporation) and the Parent dated January 26, 2009, and all amendments thereto, the Employment Standards Code (Alberta), the Alberta Human Rights Act, the Personal Information Protection Act (Alberta), or any other applicable legislation governing or related to my employment with the Company; provided, however, that the Parent’s obligation to indemnify me and hold me harmless from claims pursuant to that certain Indemnity Agreement between me and the Parent dated March 2, 2009, is not released by this Final Release.

AND FOR THE SAID CONSIDERATION I represent and warrant that I have not assigned to any person, firm, or corporation any of the actions, causes of action, claims, suits, executions or demands which I release by this Final Release, or with respect to which I agree not to make any claim or take any proceeding herein.

IT IS FURTHER ACKNOWLEDGED that I am in receipt of all wages, overtime pay, vacation pay and general holiday pay and I further reconfirm that there are no entitlements, overtime pay or wages due and owing to myself by the Releasees. I confirm and agree that I have not received any employment insurance benefits from Human Resources and Skills Development Canada or the Government of Canada in any capacity, and I further confirm that there are no amounts owed or outstanding by myself or the Releasees for employment insurance benefits. I hereby agree to indemnify and hold harmless the Releasees for any amounts owing for employment insurance. I further agree to indemnify and save harmless the Releasees and shall be liable to the Releasees for any claims in regards to the non-deduction or insufficient deduction of taxes or employment insurance monies relating to the settlement agreed to herein, including any legal costs, interest or penalties as may be assessed or alleged against the Releasees.

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IT IS HEREBY AGREED that the invalidity and unenforceability of any provision of this Final Release shall not affect the validity or enforceability of any other provision of this agreement, which shall remain in full force and effect.

I HEREBY DECLARE that I have read all of this Final Release, fully understand the terms of this Final Release and voluntarily accept the consideration stated herein as consideration for the purpose of making a full and final settlement with the Releasees. I acknowledge and confirm that I have been given an adequate period of time to obtain independent legal counsel regarding the meaning and the significance of the terms of this Final Release. I understand and agree that the terms of this Final Release contain the entire agreement between myself and the Releasees pertaining to the subject matter hereof. I further understand that any dispute relating to this Final Release will be governed by the laws of the Province of Alberta and I submit to the jurisdiction of the courts of that province.

IN WITNESS WHEREOF, I have set my hand and seal this ____ day of _________, 2014.

SHANE P. O’LEARY

WITNESS (Signature)

WITNESS (Print Name)

EX-10.4

Free English translation of Spanish language document

Exhibit 10.4

Execution DateCity and Date	Bogotá D. C. the 29th of August of 2014
Addendum No. 1	Crude Oil Transportation Agreement - DC - 008 - 2013

SENDER	GRAN TIERRA ENERGY COLOMBIA LTD
NIT	860516431 - 7

OPERATOR	CENIT TRANSPORTE Y LOGÍSTICA DE HIDROCARBUROS S. A. S.
NIT	900.531.210 - 3

PURPOSE Service of transportation of liquid hydrocarbons on the Mansoyá - Orito Pipeline (OMO)

This Addendum No. 1 to the Contract for the Transportation of Crude Oil on the Mansoyá - Orito Pipeline entered into on the 31^st of August of 2013 (the “Agreement”), is entered into on the 29^th day of the month of August of 2014 (“Execution Date”) by:

(1) CENIT TRANSPORTE Y LOGÍSTICA DE HIDROCARBUROSS. A. S., s a Colombian commercial simplified shares’ company, domiciled in the city of Bogotá, incorporated by private document of the 15^th of June of 2012 and registered in the commercial record on the same date, with commercial registration number No. 02224959 (hereinafter, “CENIT” or the Transporter”), legally represented by Eugenio Gómez Hoyos, identified with the Colombian I. D. Card No. 79.121.780 of Fontibón acting in his capacity as General Attorney by virtue of the power of attorney granted by public deed No. 1910 of the 3^rd of July of 2013 of Notary 51 of the city of Bogotá representative duly empowered to enter into this act; and

(2) GRAN TIERRA ENERGY COLOMBIA LTD, a company organized and existing according to the laws of Utah, United States of America, acting through its Colombian branch domiciled in Bogotá, established by public deed number 5323 of the 25^th of October of 1983 before the 7^th Notary of the City of Bogotá, (el “SENDER”) legally represented by MANUEL BUITRAGO VIVES, of legal age, domiciled in the city of Bogotá, identified with Colombian I. D. Card No. 72.191.666 of Barranquilla and by ALEJANDRA ESCOBAR HERRERA,of legal age, domiciled in the city of Bogotá, identified with Colombian I. D. Card No. 52.646.943 of Usaquén, acting in their capacity as Legal Representatives, duly empowered to enter into this agreement, as can be verified in the respective Certificate of Existence and Incumbency,

CENIT and the SENDER may also be individually called a “Party” or collectively the “Parties”.

This Addendum No. 1 to the Agreement his entered into after the following:

Free English translation of Spanish language document

CONSIDERATIONS

1. Whereas, the Agreement, according to the terms set forth in it, was executed by the Parties on the 31^st of August of 2013 and it is in full force, according to the terms initially agreed in it, until the 30^th of August of 2014.

2. Whereas, the purpose of the Agreement is the provision of the Service of Transportation of Crude Oil Owned by the SENDER on the Mansoyá - Orito Pipeline owned by CENIT (the “Pipeline”).

3. Whereas, according to the provisions of Section 4.02 of the Agreement, the Parties may extend the Term for the Provision of the Service by executing a document before the date of termination of the Agreement.

4. Whereas, the Parties have expressed their interest on extending the Term for the Provision of the Service in the Agreement for a period of three (03) months as from the 31^st of August of 2014, namely until the 30^th of November of 2014

5. Whereas, the Parties have also agreed to amend Clause 5 of the Agreement, in sections 5.04 - Payment and Invoicing and 5.06 - Adjustments to the Invoicing of the Service, in order to adjust the terms and conditions related to the Representative Market Rate (TRM) applicable to the payment in Colombian pesos of the Fee for the provision of the Service.

6. Whereas because of the extension of the term of the Agreement made by virtue of this Addendum No. 1, it is necessary for the SENDER to amend and submit duly adjusted, the Guarantee furnished to CENIT in the terms set forth in the Agreement, for the same to comprise and cover the period for which this Addendum No. 1 extends the term of the Agreement.

7. Whereas, by virtue of the foregoing considerations the Parties enter into this Addendum No. 1 to the Agreement, which will be governed by the clauses set forth below.

CLAUSES

FIRST - EXTENSION - The Parties agree to extend the Term for the Provision of the Service for an additional term of three (03) months, namely until the thirtieth (30^th) of November of 2014.

SECOND: – Amendment of Clause 5, sections 5.04 - Amount and Terms of Payment of the Service and 5.06 – Adjustments in the Invoicing of the Service, which shall now read as follows:

“Section 5.04 - Payment and Invoicing:

(a) Modality, Frequency and Term for the Payment: The SENDER irrevocably and unconditionally agrees to: (i) pay the Fee for the Service under the modality of Use and Pay

Free English translation of Spanish language document

established in this Agreement, on a monthly basis, within thirty (30) days after the date in which CENIT issues the invoice for the provision of the Service.

(b) Currency of Payment: The payments will be made in Colombian pesos. The amount payable will be determined based on the Service Fee certified in dollars and it will be calculated using the official Representative Market Rate (TRM) certified by the Financial Superintendence of the first day of the month of provision of the Services.

(c) Place of Payment: The SENDER must make the payment by bank deposit or transfer into any of the bank accounts that CENIT, as the holder, informs to the SENDER in each invoice.

(d) Invoicing: CENIT will send to the SENDER no later than on the twentieth (20^th) day of each Month of Operation, the invoice with the amount that the SENDER must pay for the Service based on the nomination made by the SENDER and accepted by CENIT for the respective Month of Operation.”

“Section 5.06 - Adjustments of the Invoicing of the Service:

(a) CENIT will make adjustments to the invoicing based on the “Gross Standard Volume”, reported in the CVC’s transportation sheet of each Pipeline and certified by the independent inspector at the Pipeline’s Point of Entry.

(b) CENIT will make adjustments to the invoicing based on the volumes invoiced and on the volumes actually transported. If as a result of the adjustment mentioned in this item it is established that the SENDER paid in excess for the Service, CENIT will compensate the SENDER generating a credit note for the excess amounts paid in favor of the SENDER to be credited in the invoicing issued for the services provided under this Agreement or under other agreements between the SENDER and CENIT. In case that the Term for the Provision of the Service under this Agreement has ended or if there are no other contractual relationships between CENIT and the SENDER, CENIT will pay back the excess amount charged within thirty (30) business Days after the acknowledgement by CENIT. If, on the contrary, as a result of the adjustment the subject matter of this Section it is established that the SENDER paid an amount lower than the one that would correspond for the volumes actually transported, CENIT will issue the respective adjustment invoice, which will be paid by the SENDER within thirty (30) Days after the date of issuance thereof, using the TRM of the first day of provision of the Service to which the adjustment corresponds; the TRM must be duly certified by the Financial Superintendence or the entity that takes its place.”

THIRD -GUARANTEE: THE SENDER, in a term of no more than ten (10) calendar days as from the Date of Execution Date of this Addendum No. 1 to the Agreement, agrees to apply for, obtain and deliver to CENIT the amendment on the Guarantee granted under the Agreement adjusting its term and amount according to the extension of the Term for the Provision of the Service agreed in this Addendum No. 1, in the terms and conditions set forth in the Sixth Clause of The Agreement.

FOURTH– COPE OF THIS ADDENDUM: This Addendum No. 1 to the Agreement is not a novation thereof, as it is in full force and effect excepting for what was expressly amended by virtue of this Addendum No. 1. In case of contradiction between the provisions of the Agreement and the provisions of this Addendum No. 1, or faced with a void or inconsistency, the Parties, by virtue of the principle of good faith and using

Free English translation of Spanish language document

their best efforts, commit to readjust it or to carry out any acts that may be necessary for its correct compliance.

This Addendum is perfected with the signature of the Parties on the twenty ninth (29^th) day of the month of August of 2014.

CENIT

     /s/ Eugenio Gomez Hoyos    

EUGENIO GÓMEZ HOYOS

C.C. No. 79.121.780 of Fontibón

General Attorney

THE SENDER

     /s/ Manuel Buitrago                 

MANUEL BUITRAGO

C.C. 72.191.666

 Legal Representative

  /s/ Alejandra Escobar Herrera    

ALEJANDRA ESCOBAR HERRERA

C.C. 52.646.943 of Bogotá

 Legal Representative

Fecha de FirmaCiudad y Fecha	Bogotá D.C. 29 de agosto de 2014
Otrosí No. 1	Contrato DC-Contrato de Transporte de Crudo-008-2013

REMITENTE	GRAN TIERRA ENERGY COLOMBIA LTD
NIT	860516431-7

OPERADOR	CENIT TRANSPORTE Y LOGÍSTICA DE HIDROCARBUROS S.A.S
NIT	900.531.210-3

OBJETO Servicio de transporte de hidrocarburos líquidos por el Oleoducto Mansoyá - Orito (OMO)

Este Otrosí No. 1 al Contrato de Transporte de Crudo por el Oleoducto Mansoyá - Orito celebrado el 31 de agosto de 2013 (el “Contrato”), se suscribe a los 29 días del mes de agosto de 2014 (“Fecha de Firma”) por:

(3) CENIT TRANSPORTE Y LOGÍSTICA DE HIDROCARBUROS S.A.S., sociedad colombiana de naturaleza mercantil, del tipo de las sociedades por acciones simplificada, con domicilio en la ciudad de Bogotá, constituida mediante documento privado de junio 15 de 2012 e inscrita en el registro mercantil en la misma fecha, con matrícula mercantil No. 02224959 (“CENIT”o el “Transportador”), representada legalmente por Eugenio Gómez Hoyos, mayor de edad, domiciliado en la ciudad de Bogotá, identificado con la cédula de ciudadanía No. 79.121.780 de Fontibón, quien actúa en su condición de Apoderado General en virtud del poder conferido mediante Escritura Pública No. 1910 de julio 3 de 2013 de la Notaría 51 del Círculo de Bogotá, debidamente facultado para la celebración de este acto; y

(4) GRAN TIERRA ENERGY COLOMBIA LTD, sociedad constituida y organizada de conformidad con las leyes de Utah, Estados Unidos de Norte América, actuando a través de sucursal debidamente establecida en Colombia mediante escritura pública número 5323 de octubre 25 de 1983 otorgada en la Notaría 7ª del Círculo de Bogotá, con domicilio en la ciudad de Bogotá (el “REMITENTE”), representada legalmente por MANUEL BUITRAGO, mayor de edad, domiciliado en la ciudad de Bogotá, identificado con la cédula de ciudadanía No. 72.191.666 de Barranquilla y por ALEJANDRA ESCOBAR HERRERA, mayor de edad, domiciliada en la ciudad de Bogotá, identificada con la cédula de ciudadanía No 52.646.943 de Usaquén, quienes actúan en su condición de Representantes Legales, debidamente facultados para la celebración de este acto conforme se puede verificar en el Certificado de Existencia y Representación Legal respectivo,

OTROSI No.1 Contrato DC-Contrato de Transporte de Crudo-008-2013Página No. 1

CENIT y el REMITENTEtambién podrán ser denominados individualmente como la “Parte” o conjuntamente como las “Partes”.

El presente Otrosí No. 1 al Contrato, se suscribe previas las siguientes:

CONSIDERACIONES

8. Que el Contrato, conforme los términos en él previstos, fue ejecutado por las Partes el 31 de agosto de 2013 y se encuentra en vigencia, conforme el término de duración inicialmente pactado, hasta el día 30 de agosto de 2014.

9. Que el objeto del Contrato consiste en la prestación del Servicio de Transporte de Crudo de Propiedad del REMITENTE por el Oleoducto Mansoyá - Orito, propiedad de CENIT. (el “Oleoducto”).

10. Que de conformidad con lo dispuesto en la Sección 4.02 del Contrato, las Partes podrán prorrogar el Plazo de Prestación del Servicio mediante la suscripción de un documento con anterioridad a la fecha de terminación del Contrato.

11. Que las Partes han manifestado su interés en extender el Plazo de Prestación del Servicio del Contrato, por un término de tres (03) meses contados a partir del 31 de agosto de 2014, es decir hasta el 30 de noviembre de 2014

12. Que, adicionalmente las Partes han acordado modificar la Cláusula 5 del Contrato, en sus secciones 5.04 - Pago y Facturación y 5.06 - Ajustes en la Facturación por Servicio, con el objeto de ajustar los términos y condiciones relacionados con la Tasa Representativa del Mercado (TRM) aplicable al pago en pesos colombianos de la Tarifa por la prestación del Servicio.

13. Que, con ocasión de la extensión a la vigencia del Contrato que se pacta en virtud del presente Otrosí No. 1, es necesario que el REMITENTE modifique y entregue debidamente ajustada la Garantía otorgada a CENIT en los términos previstos en el Contrato a fin de que la misma comprenda y ampare el periodo por el cual este Otrosí No. 1 extiende la vigencia del Contrato.

14. Que en virtud de las anteriores consideraciones las Partes celebran el presente Otrosí No. 1 al Contrato el cual se regirá por las cláusulas que se establecen a continuación.

CLÁUSULAS

PRIMERA: - PRÓRROGA- . PRÓRROGA- . Las Partes acuerdan en prorrogar el Plazo de Prestación del Servicio por un término de tres (03) meses adicionales al término de duración inicialmente convenido, esto es hasta el día treinta (30) de noviembre de 2014.

SEGUNDA– Modificación de la Cláusula5 en sus secciones 5.04 de Valor y Forma de Pago del Servicio y 5.06 Ajustes en la Facturación por Servicio, la cual quedará así:

OTROSI No.1 Contrato DC-Contrato de Transporte de Crudo-008-2013Página No. 2

“Sección 5.04 Pago y Facturación:

(e) Modalidad, Periodicidad y Plazo para el Pago: El REMITENTE se obliga irrevocable e incondicionalmente a: (i) pagar la Tarifa por el Servicio bajo la modalidad Utilice y Pague establecida en este Contrato, en forma mensual, dentro de los treinta (30) Días siguientes a la fecha en que CENIT emita la factura por la prestación del Servicio.

(f) Moneda de Pago: Los pagos serán realizados en pesos colombianos. El valor de pago se determinará tomando como base la Tarifa del Servicio correspondiente en dólares y se liquidará a la Tasa Representativa del Mercado (TRM) oficial certificada por la Superintendencia Financiera del primer día del mes de prestación de Servicio.

(g) Lugar del Pago: El REMITENTE deberá efectuar el pago mediante consignación o transferencia en cualquiera de las cuentas bancarias que CENIT, como su titular, le indique al REMITENTE en cada factura.

(h) Facturación: CENIT enviará al REMITENTE a más tardar el día veinte (20) de cada Mes de Operación, la factura con la cantidad que el REMITENTE debe pagar por concepto del Servicio con base en la nominación realizada por el REMITENTE y aceptada por CENIT para el Mes de Operación respectivo.”

“Sección 5.06 Ajustes en la facturación por Servicio:

(c) CENIT realizará ajustes a la facturación con base en los volúmenes “Gross Standard Volume”, reportados en la hoja de transporte de la CVC de cada Oleoducto y certificados por el inspector independiente en el Punto de Entrada del Oleoducto.

(d) CENIT realizará ajustes a la facturación con base en los volúmenes facturados y los volúmenes efectivamente transportados. Si como resultado del ajuste a que se refiere este numeral se establece que el REMITENTE pagó en exceso por el Servicio, CENIT compensará al REMITENTE generando una nota créditopor los montos pagados en exceso a favor del REMITENTE a ser acreditada en la facturación emitida por concepto de servicios prestados bajo este o bajo otros contratos entre el REMITENTE y CENIT. En caso de que el Plazo de Prestación del Servicio bajo el presente Contrato hubiera concluido o no exista otra relación contractual entre CENIT y el REMITENTE, CENIT devolverá el valor cobrado en exceso dentro de los treinta (30) días hábiles siguientes al reconocimiento por parte de CENIT. Si por el contrario, como resultado del ajuste al que se refiere esta sección se establece que el REMITENTE pagó un monto menor al que correspondería por concepto de volúmenes efectivamente transportados, CENIT emitirá la correspondiente factura de ajuste, la cual deberá ser cancelada por el REMITENTE dentro de los treinta (30) Días siguientes a la fecha de emisión de la misma, utilizando la TRM del primer día de mes de prestación del Servicio al cual corresponde el ajuste, la TRM debe estar certificada por la Superintendencia Financiera o entidad que haga sus veces.”

TERCERAGARANTÍA: El REMITENTE, en un plazo no mayor a diez (10) días calendario contados a partir de la Fecha de Firma del presente Otrosí No. 1 al Contrato se obliga a tramitar, obtener y entregar a CENIT la modificación de la Garantía otorgada bajo el Contrato ajustándolaen su vigencia y monto de

OTROSI No.1 Contrato DC-Contrato de Transporte de Crudo-008-2013Página No. 3

conformidad con la extensión del Plazo de Prestación del Servicio acordada mediante el presente Otrosí No. 1, en los términos y condiciones establecidos en la Cláusula Sexta del Contrato.

CUARTAO– ALCANCE DEL PRESENTE OTROSI: El presente Otrosí No.1 al Contrato no constituye novación del mismo el cual se encuentra en vigencia, excepto por lo expresamente modificado en virtud de este Otrosí No.1. En caso de contradicción entre lo establecido en el Contrato y lo previsto en el presente Otrosí No. 1, o ante la existencia de un vacío o inconsistencia, las Partes, en virtud del principio de la buena fe y empleando sus mejores esfuerzos, se obligan a reajustarlo o a realizar los actos que sean necesarios para su correcto cumplimiento.

El presente Otrosí se perfecciona con su suscripción por las Partes a los veintinueve (29) días del mes de Agosto de 2014

CENIT

     /s/ Eugenio Gomez Hoyos    

EUGENIO GÓMEZ HOYOS

C.C. No. 79.121.780 of Fontibón

General Attorney

EL REMITENTE

     /s/ Manuel Buitrago                 

MANUEL BUITRAGO

C.C. 72.191.666

 Legal Representative

  /s/ Alejandra Escobar Herrera    

ALEJANDRA ESCOBAR HERRERA

C.C. 52.646.943 of Bogotá

 Legal Representative

OTROSI No.1 Contrato DC-Contrato de Transporte de Crudo-008-2013Página No. 4

EX-10.5

Free English translation of Spanish language document        

Exhibit 10.5

Execution DateCity and Date	Bogotá D. C. the 29th of August of 2014
Addendum No. 1	Crude Oil Transportation Agreement - DC - 017 - 2013

SENDER	PETROLIFERA PETROLEUM (COLOMBIA) LIMITED
NIT	900.139.306-1

OPERATOR	CENIT TRANSPORTE Y LOGÍSTICA DE HIDROCARBUROS S. A. S
NIT	900.531.210 - 3

PURPOSE Service of transportation of liquid hydrocarbons on the Mansoyá - Orito Pipeline (OMO)

This Addendum No. 1 to the Contract for the Transportation of Crude Oil on the Mansoyá - Orito Pipeline entered into on the 31^st of August of 2013 (the “Agreement”), is entered into on the 29^th day of the month of August of 2014 (“Execution Date”) by:

(1) CENIT TRANSPORTE Y LOGÍSTICA DE HIDROCARBUROSS. A. S., s a Colombian commercial simplified shares’ company, domiciled in the city of Bogotá, incorporated by private document of the 15^th of June of 2012 and registered in the commercial record on the same date, with commercial registration number No. 02224959 (hereinafter, “CENIT” or the Transporter”), legally represented by Eugenio Gómez Hoyos, identified with the Colombian I. D. Card No. 79.121.780 of Fontibón acting in his capacity as General Attorney by virtue of the power of attorney granted by public deed No. 1910 of the 3^rd of July of 2013 of Notary 51 of the city of Bogotá representative duly empowered to enter into this act; and

(2) PETROLIFERA PETROLEUM (COLOMBIA) LIMITED, a company organized and existing according to the laws of Cayman Islands acting through its Colombian branch domiciled in Bogotá, established by public deed number 1682 of the 2^nd of March of 2007 before the 6^th Notary of the city of Bogotá (the “SENDER”) legally represented by MANUEL BUITRAGO VIVES, of legal age, domiciled in the city of Bogotá, identified with Colombian I. D. Card No. 72.191.666 of Barranquilla and by ALEJANDRA ESCOBAR HERRERA,of legal age, domiciled in the city of Bogotá, identified with Colombian I. D. Card No. 52.646.943 of Usaquén, acting in their capacity as Legal Representatives, duly empowered to enter into this agreement, as can be verified in the respective Certificate of Existence and Incumbency,

CENIT and the SENDER may also be individually called a “Party” or collectively the “Parties”.

This Addendum No. 1 to the Agreement his entered into after the following:

ADDENDUM No.1 Contrato DC – Crude Oil Transportation Agreement - 017 - 2013Page No. 1

Free English translation of Spanish language document        

CONSIDERATIONS

1. Whereas, the Agreement, according to the terms set forth in it, was executed by the Parties on the 31^st of August of 2013 and it is in full force, according to the terms initially agreed in it, until the 30^th of August of 2014.

2. Whereas, the purpose of the Agreement is the provision of the Service of Transportation of Crude Oil Owned by the SENDER on the Mansoyá - Orito Pipeline owned by CENIT (the “Pipeline”).

3. Whereas, according to the provisions of Section 4.02 of the Agreement, the Parties may extend the Term for the Provision of the Service by executing a document before the date of termination of the Agreement.

4. Whereas, the Parties have expressed their interest on extending the Term for the Provision of the Service in the Agreement for a period of three (03) months as from the 31^st of August of 2014, namely until the 30^th of November of 2014

5. Whereas, the Parties have also agreed to amend Clause 5 of the Agreement, in sections 5.04 - Payment and Invoicing and 5.06 - Adjustments to the Invoicing of the Service, in order to adjust the terms and conditions related to the Representative Market Rate (TRM) applicable to the payment in Colombian pesos of the Fee for the provision of the Service.

6. Whereas because of the extension of the term of the Agreement made by virtue of this Addendum No. 1, it is necessary for the SENDER to amend and submit duly adjusted, the Guarantee furnished to CENIT in the terms set forth in the Agreement, for the same to comprise and cover the period for which this Addendum No. 1 extends the term of the Agreement.

7. Whereas, by virtue of the foregoing considerations the Parties enter into this Addendum No. 1 to the Agreement, which will be governed by the clauses set forth below.

CLAUSES

FIRST - EXTENSION - The Parties agree to extend the Term for the Provision of the Service for an additional term of three (03) months, namely until the thirtieth (30^th) of November of 2014.

SECOND: – Amendment of Clause 5, sections 5.04 - Amount and Terms of Payment of the Service and 5.06 – Adjustments in the Invoicing of the Service, which shall now read as follows:

“Section 5.04 - Payment and Invoicing:

ADDENDUM No.1 Contrato DC – Crude Oil Transportation Agreement - 017 - 2013Page No. 2

Free English translation of Spanish language document        

(a) Modality, Frequency and Term for the Payment: The SENDER irrevocably and unconditionally agrees to: (i) pay the Fee for the Service under the modality of Use and Pay established in this Agreement, on a monthly basis, within thirty (30) days after the date in which CENIT issues the invoice for the provision of the Service.

(b) Currency of Payment: The payments will be made in Colombian pesos. The amount payable will be determined based on the Service Fee certified in dollars and it will be calculated using the official Representative Market Rate (TRM) certified by the Financial Superintendence of the first day of the month of provision of the Services.

(c) Place of Payment: The SENDER must make the payment by bank deposit or transfer into any of the bank accounts that CENIT, as the holder, informs to the SENDER in each invoice.

(d) Invoicing: CENIT will send to the SENDER no later than on the twentieth (20^th) day of each Month of Operation, the invoice with the amount that the SENDER must pay for the Service based on the nomination made by the SENDER and accepted by CENIT for the respective Month of Operation.”

“Section 5.06 - Adjustments of the Invoicing of the Service:

(a) CENIT will make adjustments to the invoicing based on the “Gross Standard Volume”, reported in the CVC’s transportation sheet of each Pipeline and certified by the independent inspector at the Pipeline’s Point of Entry.

(b) CENIT will make adjustments to the invoicing based on the volumes invoiced and on the volumes actually transported. If as a result of the adjustment mentioned in this item it is established that the SENDER paid in excess for the Service, CENIT will compensate the SENDER generating a credit note for the excess amounts paid in favor of the SENDER to be credited in the invoicing issued for the services provided under this Agreement or under other agreements between the SENDER and CENIT. In case that the Term for the Provision of the Service under this Agreement has ended or if there are no other contractual relationships between CENIT and the SENDER, CENIT will pay back the excess amount charged within thirty (30) business Days after the acknowledgement by CENIT. If, on the contrary, as a result of the adjustment the subject matter of this Section it is established that the SENDER paid an amount lower than the one that would correspond for the volumes actually transported, CENIT will issue the respective adjustment invoice, which will be paid by the SENDER within thirty (30) Days after the date of issuance thereof, using the TRM of the first day of provision of the Service to which the adjustment corresponds; the TRM must be duly certified by the Financial Superintendence or the entity that takes its place.”

THIRD -GUARANTEE: THE SENDER, in a term of no more than ten (10) calendar days as from the Date of Execution Date of this Addendum No. 1 to the Agreement, agrees to apply for, obtain and deliver to CENIT the amendment on the Guarantee granted under the Agreement adjusting its term and amount according to the extension of the Term for the Provision of the Service agreed in this Addendum No. 1, in the terms and conditions set forth in the Sixth Clause of The Agreement.

FOURTH– COPE OF THIS ADDENDUM: This Addendum No. 1 to the Agreement is not a novation thereof, as it is in full force and effect excepting for what was expressly amended by virtue of this Addendum No. 1. In case of contradiction between the provisions of the Agreement and the provisions of this Addendum

ADDENDUM No.1 Contrato DC – Crude Oil Transportation Agreement - 017 - 2013Page No. 3

Free English translation of Spanish language document        

No. 1, or faced with a void or inconsistency, the Parties, by virtue of the principle of good faith and using their best efforts, commit to readjust it or to carry out any acts that may be necessary for its correct compliance.

This Addendum is perfected with the signature of the Parties on the twenty ninth (29^th) day of the month of August of 2014.

CENIT

     /s/ Eugenio Gomez Hoyos    

EUGENIO GÓMEZ HOYOS

C.C. No. 79.121.780 of Fontibón

General Attorney

THE SENDER

     /s/ Manuel Buitrago                 

MANUEL BUITRAGO

C.C. 72.191.666

 Legal Representative

  /s/ Alejandra Escobar Herrera    

ALEJANDRA ESCOBAR HERRERA

C.C. 52.646.943 of Bogotá

 Legal Representative

ADDENDUM No.1 Contrato DC – Crude Oil Transportation Agreement - 017 - 2013Page No. 4

Fecha de FirmaCiudad y Fecha	Bogotá D.C. 29 de agosto de 2014
Otrosí No. 1	Contrato DC-Contrato de Transporte de Crudo-017-2013

REMITENTE	PETROLIFERA PETROLEUM (COLOMBIA) LIMITED
NIT	900.139.306-1

OPERADOR	CENIT TRANSPORTE Y LOGÍSTICA DE HIDROCARBUROS S.A.S
NIT	900.531.210-3

OBJETO Servicio de transporte de hidrocarburos líquidos por el Oleoducto Mansoyá - Orito (OMO)

Este Otrosí No. 1 al Contrato de Transporte de Crudo por el Oleoducto Mansoyá - Orito celebrado el 31 de agosto de 2013 (el “Contrato”), se suscribe a los 29 días del mes de agosto de 2014 (“Fecha de Firma”) por:

(3) CENIT TRANSPORTE Y LOGÍSTICA DE HIDROCARBUROS S.A.S., sociedad colombiana de naturaleza mercantil, del tipo de las sociedades por acciones simplificada, con domicilio en la ciudad de Bogotá, constituida mediante documento privado de junio 15 de 2012 e inscrita en el registro mercantil en la misma fecha, con matrícula mercantil No. 02224959 (“CENIT”o el “Transportador”), representada legalmente por Eugenio Gómez Hoyos, mayor de edad, domiciliado en la ciudad de Bogotá, identificado con la cédula de ciudadanía No. 79.121.780 de Fontibón, quien actúa en su condición de Apoderado General en virtud del poder conferido mediante Escritura Pública No. 1910 de julio 3 de 2013 de la Notaría 51 del Círculo de Bogotá, debidamente facultado para la celebración de este acto; y

(4) PETROLIFERA PETROLEUM (COLOMBIA) LIMITED, sociedad constituida y organizada de conformidad con las leyes de las Islas Cayman, actuando a través de sucursal debidamente establecida en Colombia mediante escritura pública número 1682 de marzo 2 de 2007 otorgada en la Notaría 6ª del Círculo de Bogotá (el “REMITENTE”), representada legalmente por MANUEL BUITRAGO, mayor de edad, domiciliado en la ciudad de Bogotá, identificado con la cédula de ciudadanía No. 72.191.666 de Barranquilla y por ALEJANDRA ESCOBAR HERRERA, mayor de edad, domiciliada en la ciudad de Bogotá, identificada con la cédula de ciudadanía No 52.646.943 de Usaquén, quienes actúan en su condición de Representantes Legales, debidamente facultados para la celebración de este acto conforme se puede verificar en el Certificado de Existencia y Representación Legal respectivo,

ADDENDUM No.1 Contrato DC – Crude Oil Transportation Agreement - 017 - 2013Page No. 1

CENIT y el REMITENTEtambién podrán ser denominados individualmente como la “Parte” o conjuntamente como las “Partes”.

El presente Otrosí No. 1 al Contrato, se suscribe previas las siguientes:

CONSIDERACIONES

8. Que el Contrato, conforme los términos en él previstos, fue ejecutado por las Partes el 31 de agosto de 2013 y se encuentra en vigencia, conforme el término de duración inicialmente pactado, hasta el día 30 de agosto de 2014.

9. Que el objeto del Contrato consiste en la prestación del Servicio de Transporte de Crudo de Propiedad del REMITENTE por el Oleoducto Mansoyá - Orito, propiedad de CENIT. (el “Oleoducto”).

10. Que de conformidad con lo dispuesto en la Sección 4.02 del Contrato, las Partes podrán prorrogar el Plazo de Prestación del Servicio mediante la suscripción de un documento con anterioridad a la fecha de terminación del Contrato.

11. Que las Partes han manifestado su interés en extender el Plazo de Prestación del Servicio del Contrato, por un término de tres (03) meses contados a partir del 31 de agosto de 2014, es decir hasta el 30 de noviembre de 2014

12. Que, adicionalmente las Partes han acordado modificar la Cláusula 5 del Contrato, en sus secciones 5.04 - Pago y Facturación y 5.06 - Ajustes en la Facturación por Servicio, con el objeto de ajustar los términos y condiciones relacionados con la Tasa Representativa del Mercado (TRM) aplicable al pago en pesos colombianos de la Tarifa por la prestación del Servicio.

13. Que, con ocasión de la extensión a la vigencia del Contrato que se pacta en virtud del presente Otrosí No. 1, es necesario que el REMITENTE modifique y entregue debidamente ajustada la Garantía otorgada a CENIT en los términos previstos en el Contrato a fin de que la misma comprenda y ampare el periodo por el cual este Otrosí No. 1 extiende la vigencia del Contrato.

14. Que en virtud de las anteriores consideraciones las Partes celebran el presente Otrosí No. 1 al Contrato el cual se regirá por las cláusulas que se establecen a continuación.

CLÁUSULAS

PRIMERA: - PRÓRROGA- . PRÓRROGA- . Las Partes acuerdan en prorrogar el Plazo de Prestación del Servicio por un término de tres (03) meses adicionales al término de duración inicialmente convenido, esto es hasta el día treinta (30) de noviembre de 2014.

SEGUNDA– Modificación de la Cláusula5 en sus secciones 5.04 de Valor y Forma de Pago del Servicio y 5.06 Ajustes en la Facturación por Servicio, la cual quedará así:

ADDENDUM No.1 Contrato DC – Crude Oil Transportation Agreement - 017 - 2013Page No. 2

“Sección 5.04 Pago y Facturación:

(e) Modalidad, Periodicidad y Plazo para el Pago: El REMITENTE se obliga irrevocable e incondicionalmente a: (i) pagar la Tarifa por el Servicio bajo la modalidad Utilice y Pague establecida en este Contrato, en forma mensual, dentro de los treinta (30) Días siguientes a la fecha en que CENIT emita la factura por la prestación del Servicio.

(f) Moneda de Pago: Los pagos serán realizados en pesos colombianos. El valor de pago se determinará tomando como base la Tarifa del Servicio correspondiente en dólares y se liquidará a la Tasa Representativa del Mercado (TRM) oficial certificada por la Superintendencia Financiera del primer día del mes de prestación de Servicio.

(g) Lugar del Pago: El REMITENTE deberá efectuar el pago mediante consignación o transferencia en cualquiera de las cuentas bancarias que CENIT, como su titular, le indique al REMITENTE en cada factura.

(h) Facturación: CENIT enviará al REMITENTE a más tardar el día veinte (20) de cada Mes de Operación, la factura con la cantidad que el REMITENTE debe pagar por concepto del Servicio con base en la nominación realizada por el REMITENTE y aceptada por CENIT para el Mes de Operación respectivo.”

“Sección 5.06 Ajustes en la facturación por Servicio:

(c) CENIT realizará ajustes a la facturación con base en los volúmenes “Gross Standard Volume”, reportados en la hoja de transporte de la CVC de cada Oleoducto y certificados por el inspector independiente en el Punto de Entrada del Oleoducto.

(d) CENIT realizará ajustes a la facturación con base en los volúmenes facturados y los volúmenes efectivamente transportados. Si como resultado del ajuste a que se refiere este numeral se establece que el REMITENTE pagó en exceso por el Servicio, CENIT compensará al REMITENTE generando una nota créditopor los montos pagados en exceso a favor del REMITENTE a ser acreditada en la facturación emitida por concepto de servicios prestados bajo este o bajo otros contratos entre el REMITENTE y CENIT. En caso de que el Plazo de Prestación del Servicio bajo el presente Contrato hubiera concluido o no exista otra relación contractual entre CENIT y el REMITENTE, CENIT devolverá el valor cobrado en exceso dentro de los treinta (30) días hábiles siguientes al reconocimiento por parte de CENIT. Si por el contrario, como resultado del ajuste al que se refiere esta sección se establece que el REMITENTE pagó un monto menor al que correspondería por concepto de volúmenes efectivamente transportados, CENIT emitirá la correspondiente factura de ajuste, la cual deberá ser cancelada por el REMITENTE dentro de los treinta (30) Días siguientes a la fecha de emisión de la misma, utilizando la TRM del primer día de mes de prestación del Servicio al cual corresponde el ajuste, la TRM debe estar certificada por la Superintendencia Financiera o entidad que haga sus veces.”

TERCERAGARANTÍA: El REMITENTE, en un plazo no mayor a diez (10) días calendario contados a partir de la Fecha de Firma del presente Otrosí No. 1 al Contrato se obliga a tramitar, obtener y entregar a CENIT la modificación de la Garantía otorgada bajo el Contrato ajustándolaen su vigencia y monto de conformidad con la extensión del Plazo de Prestación del Servicio acordada mediante el presente Otrosí No. 1, en los términos y condiciones establecidos en la Cláusula Sexta del Contrato.

ADDENDUM No.1 Contrato DC – Crude Oil Transportation Agreement - 017 - 2013Page No. 3

CUARTAO– ALCANCE DEL PRESENTE OTROSI: El presente Otrosí No.1 al Contrato no constituye novación del mismo el cual se encuentra en vigencia, excepto por lo expresamente modificado en virtud de este Otrosí No.1. En caso de contradicción entre lo establecido en el Contrato y lo previsto en el presente Otrosí No. 1, o ante la existencia de un vacío o inconsistencia, las Partes, en virtud del principio de la buena fe y empleando sus mejores esfuerzos, se obligan a reajustarlo o a realizar los actos que sean necesarios para su correcto cumplimiento.

El presente Otrosí se perfecciona con su suscripción por las Partes a los veintinueve (29) días del mes de Agosto de 2014

CENIT

     /s/ Eugenio Gomez Hoyos    

EUGENIO GÓMEZ HOYOS

C.C. No. 79.121.780 of Fontibón

General Attorney

EL REMITENTE

     /s/ Manuel Buitrago                 

MANUEL BUITRAGO

C.C. 72.191.666

 Legal Representative

  /s/ Alejandra Escobar Herrera    

ALEJANDRA ESCOBAR HERRERA

C.C. 52.646.943 of Bogotá

 Legal Representative

ADDENDUM No.1 Contrato DC – Crude Oil Transportation Agreement - 017 - 2013Page No. 4

EX-10.6

Free English translation of Spanish language document            

Exhibit 10.6

Execution DateCity and Date	Bogotá D. C. the 29th of August of 2014
Addendum No. 1	Crude Oil Transportation Agreement - DC - 009 - 2013

SENDER	GRAN TIERRA ENERGY COLOMBIA LTD
NIT	860516431 - 7

OPERATOR	CENIT TRANSPORTE Y LOGÍSTICA DE HIDROCARBUROS S. A. S.
NIT	900.531.210 - 3

PURPOSE Service of transportation of liquid hydrocarbons on the Orito - Tumaco Pipeline (OTA)

This Addendum No. 1 to the Contract for the Transportation of Crude Oil on the Orito - Tumaco Pipeline entered into ton the 31^st of August of 2013 (the “Agreement”), is entered into on the 29^th day of the month of August of 2014 (“Execution Date”) by:

(1) CENIT TRANSPORTE Y LOGÍSTICA DE HIDROCARBUROSS. A. S., s a Colombian commercial simplified shares’ company, domiciled in the city of Bogotá, incorporated by private document of the 15^th of June of 2012 and registered in the commercial record on the same date, with commercial registration number No. 02224959 (hereinafter, “CENIT” or the Transporter”), legally represented by Eugenio Gómez Hoyos, identified with the Colombian I. D. Card No. 79.121.780 of Fontibón acting in his capacity as General Attorney by virtue of the power of attorney granted by public deed No. 1910 of the 3^rd of July of 2013 of Notary 51 of the city of Bogotá representative duly empowered to enter into this act; and

(2) GRAN TIERRA ENERGY COLOMBIA LTD, a company organized and existing according to the laws of Utah, United States of America, acting through its Colombian branch domiciled in Bogotá, established by public deed number 5323 of the 25^th of October of 1983 before the 7^th Notary of the City of Bogotá, (el “SENDER”) legally represented by MANUEL BUITRAGO VIVES, of legal age, domiciled in the city of Bogotá, identified with Colombian I. D. Card No. 72.191.666 of Barranquilla and by ALEJANDRA ESCOBAR HERRERA,of legal age, domiciled in the city of Bogotá, identified with Colombian I. D. Card No. 52.646.943 of Usaquén, acting in their capacity as Legal Representatives, duly empowered to enter into this agreement, as can be verified in the respective Certificate of Existence and Incumbency,

CENIT and the SENDER may also be individually called a “Party” or collectively the “Parties”.

This Addendum No. 1 to the Agreement his entered into after the following:

ADDENDUM No.1 Contrato DC – Crude Oil Transportation Agreement - 009 - 2013Page No. 1

Free English translation of Spanish language document            

CONSIDERATIONS

1. Whereas, the Agreement, according to the terms set forth in it, was executed by the Parties on the 31^st of August of 2013 and it is in full force, according to the terms initially agreed in it, until the 30^th of August of 2014.

2. Whereas, the purpose of the Agreement is the provision of the Service of Transportation of Crude Oil Owned by the SENDER on the Orito – Tumaco Pipeline owned by CENIT (the “Pipeline”).

3. Whereas, according to the provisions of Section 4.02 of the Agreement, the Parties may extend the Term for the Provision of the Service by executing a document before the date of termination of the Agreement.

4. Whereas, the Parties have expressed their interest on extending the Term for the Provision of the Service in the Agreement for a period of three (03) months as from the 31^st of August of 2014, namely until the 30^th of November of 2014

5. Whereas, the Parties have also agreed to amend Clause 5 of the Agreement, in sections 5.04 - Payment and Invoicing and 5.06 - Adjustments to the Invoicing of the Service, in order to adjust the terms and conditions related to the Representative Market Rate (TRM) applicable to the payment in Colombian pesos of the Fee for the provision of the Service.

6. Whereas because of the extension of the term of the Agreement made by virtue of this Addendum No. 1, it is necessary for the SENDER to amend and submit duly adjusted, the Guarantee furnished to CENIT in the terms set forth in the Agreement, for the same to comprise and cover the period fir which this Addendum No. 1 extends the term of the Agreement.

7. Whereas, by virtue of the foregoing considerations the Parties enter into this Addendum No. 1 to the Agreement, which will be governed by the clauses set forth below.

CLAUSES

FIRST - EXTENSION - The Parties agree to extend the Term for the Provision of the Service for an additional term of three (03) months, namely until the thirtieth (30^th) of November of 2014.

SECOND: – Amendment of Clause 5, Clause 5, sections 5.04 - Amount and Terms of Payment of the Service and 5.06 – Adjustments in the Invoicing of the Service, which shall now read as follows:

“Section 5.04 - Payment and Invoicing:

(a) Modality, Frequency and Term for the Payment: The SENDER irrevocably and unconditionally agrees to: (i) pay the Fee for the Service under the modality of Use and Pay established in this Agreement, on a monthly basis, within thirty (30) days after the date in which CENIT issues the invoice for the provision of the Service.

ADDENDUM No.1 Contrato DC – Crude Oil Transportation Agreement - 009 - 2013Page No. 2

Free English translation of Spanish language document            

(b) Currency of Payment: The payments will be made in Colombian pesos. The amount payable will be determined based on the Service Fee certified in dollars and it will be calculated using the official Representative Market Rate (TRM) certified by the Financial Superintendence of the first day of the month of provision of the Services.

(c) Place of Payment: The SENDER must make the payment by bank deposit or transfer into any of the bank accounts that CENIT, as the holder, informs to the SENDER in each invoice.

(d) Invoicing: CENIT will send to the SENDER no later than on the twentieth (20^th) day of each Month of Operation, the invoice with the amount that the SENDER must pay for the Service based on the nomination made by the SENDER and accepted by CENIT for the respective Month of Operation.”

“Section 5.06 - Adjustments of the Invoicing of the Service:

(a) CENIT will make adjustments to the invoicing based on the “Gross Standard Volume”, reported in the CVC’s transportation sheet of each Pipeline and certified by the independent inspector at the Pipeline’s Point of Entry.

(b) CENIT will make adjustments to the invoicing based on the volumes invoiced and on the volumes actually transported. If as a result of the adjustment mentioned in this item it is established that the SENDER paid in excess for the Service, CENIT will compensate the SENDER generating a credit note for the excess amounts paid in favor of the SENDER to be credited in the invoicing issued for the services provided under this Agreement or under other agreements between the SENDER and CENIT. In case that the Term for the Provision of the Service under this Agreement has ended or if there are no other contractual relationships between CENIT and the SENDER, CENIT will pay back the excess amount charged within thirty (30) business Days after the acknowledgement by CENIT. If, on the contrary, as a result of the adjustment the subject matter of this Section it is established that the SENDER paid an amount lower than the one that would correspond for the volumes actually transported, CENIT will issue the respective adjustment invoice, which will be paid by the SENDER within thirty (30) Days after the date of issuance thereof, using the TRM of the first day of provision of the Service to which the adjustment corresponds; the TRM must be duly certified by the Financial Superintendence or the entity that takes its place.”

THIRD -GUARANTEE: THE SENDER, in a term of no more than ten (10) calendar days as from the Date of Execution Date of this Addendum No. 1 to the Agreement, agrees to apply for, obtain and deliver to CENIT the amendment on the Guarantee granted under the Agreement adjusting its term and amount according to the extension of the Term for the Provision of the Service agreed in this Addendum No. 1, in the terms and conditions set forth in the Sixth Clause of The Agreement.

FOURTH– COPE OF THIS ADDENDUM: This Addendum No. 1 to the Agreement is not a novation thereof, as it is in full force and effect excepting for what was expressly amended by virtue of this Addendum No. 1. In case of contradiction between the provisions of the Agreement and the provisions of this Addendum No. 1, or faced with a void or inconsistency, the Parties, by virtue of the principle of good faith and using their best efforts, commit to readjust it or to carry out any acts that may be necessary for its correct compliance.

ADDENDUM No.1 Contrato DC – Crude Oil Transportation Agreement - 009 - 2013Page No. 3

Free English translation of Spanish language document            

This Addendum is perfected with the signature of the Parties on the twenty ninth (29^th) day of the month of August of 2014.

CENIT

     /s/ Eugenio Gomez Hoyos    

EUGENIO GÓMEZ HOYOS

C.C. No. 79.121.780 of Fontibón

General Attorney

THE SENDER

     /s/ Manuel Buitrago                 

MANUEL BUITRAGO

C.C. 72.191.666

 Legal Representative

  /s/ Alejandra Escobar Herrera    

ALEJANDRA ESCOBAR HERRERA

C.C. 52.646.943 of Bogotá

 Legal Representative

ADDENDUM No.1 Contrato DC – Crude Oil Transportation Agreement - 009 - 2013Page No. 4

Fecha de FirmaCiudad y Fecha	Bogotá D.C. 29 de agosto de 2014
Otrosí No. 1	Contrato DC-Contrato de Transporte de Crudo-009-2013

REMITENTE	GRAN TIERRA ENERGY COLOMBIA LTD
NIT	860516431-7

OPERADOR	CENIT TRANSPORTE Y LOGÍSTICA DE HIDROCARBUROS S.A.S
NIT	900.531.210-3

OBJETO Servicio de transporte de hidrocarburos líquidos por el Oleoducto Orito-Tumaco (OTA)

Este Otrosí No. 1 al Contrato de Transporte de Crudo por el Oleoducto Orito - Tumaco celebrado el 31 de agosto de 2013 (el “Contrato”), se suscribe a los 29 días del mes de agosto de 2014 (“Fecha de Firma”) por:

(3) CENIT TRANSPORTE Y LOGÍSTICA DE HIDROCARBUROS S.A.S., sociedad colombiana de naturaleza mercantil, del tipo de las sociedades por acciones simplificada, con domicilio en la ciudad de Bogotá, constituida mediante documento privado de junio 15 de 2012 e inscrita en el registro mercantil en la misma fecha, con matrícula mercantil No. 02224959 (“CENIT”o el “Transportador”), representada legalmente por Eugenio Gómez Hoyos, mayor de edad, domiciliado en la ciudad de Bogotá, identificado con la cédula de ciudadanía No. 79.121.780 de Fontibón, quien actúa en su condición de Apoderado General en virtud del poder conferido mediante Escritura Pública No. 1910 de julio 3 de 2013 de la Notaría 51 del Círculo de Bogotá, debidamente facultado para la celebración de este acto; y

(4) GRAN TIERRA ENERGY COLOMBIA LTD, sociedad constituida y organizada de conformidad con las leyes de Utah, Estados Unidos de Norte América, actuando a través de sucursal debidamente establecida en Colombia mediante escritura pública número 5323 de octubre 25 de 1983 otorgada en la Notaría 7ª del Círculo de Bogotá, con domicilio en la ciudad de Bogotá (el “REMITENTE”), representada legalmente por MANUEL BUITRAGO, mayor de edad, domiciliado en la ciudad de Bogotá, identificado con la cédula de ciudadanía No. 72.191.666 de Barranquilla y por ALEJANDRA ESCOBAR HERRERA, mayor de edad, domiciliada en la ciudad de Bogotá, identificada con la cédula de ciudadanía No 52.646.943 de Usaquén, quienes actúan en su condición de Representantes Legales, debidamente facultados para la celebración de este acto conforme se puede verificar en el Certificado de Existencia y Representación Legal respectivo,

OTROSI No.1 Contrato DC-Contrato de Transporte de Crudo-009-2013Página No. 1

CENIT y el REMITENTEtambién podrán ser denominados individualmente como la “Parte” o conjuntamente como las “Partes”.

El presente Otrosí No. 1 al Contrato, se suscribe previas las siguientes:

CONSIDERACIONES

8. Que el Contrato, conforme los términos en él previstos, fue ejecutado por las Partes el 31 de agosto de 2013 y se encuentra en vigencia, conforme el término de duración inicialmente pactado, hasta el día 30 de agosto de 2014.

9. Que el objeto del Contrato consiste en la prestación del Servicio de Transporte de Crudo de Propiedad del REMITENTE por el Oleoducto Orito – Tumaco, propiedad de CENIT. (el “Oleoducto”).

10. Que de conformidad con lo dispuesto en la Sección 4.02 del Contrato, las Partes podrán prorrogar el Plazo de Prestación del Servicio mediante la suscripción de un documento con anterioridad a la fecha de terminación del Contrato.

11. Que las Partes han manifestado su interés en extender el Plazo de Prestación del Servicio del Contrato, por un término de tres (03) meses contados a partir del 31 de agosto de 2014, es decir hasta el 30 de noviembre de 2014

12. Que, adicionalmente las Partes han acordado modificar la Cláusula 5 del Contrato, en sus secciones 5.04 - Pago y Facturación y 5.06 - Ajustes en la Facturación por Servicio, con el objeto de ajustar los términos y condiciones relacionados con la Tasa Representativa del Mercado (TRM) aplicable al pago en pesos colombianos de la Tarifa por la prestación del Servicio.

13. Que, con ocasión de la extensión a la vigencia del Contrato que se pacta en virtud del presente Otrosí No. 1, es necesario que el REMITENTE modifique y entregue debidamente ajustada la Garantía otorgada a CENIT en los términos previstos en el Contrato a fin de que la misma comprenda y ampare el periodo por el cual este Otrosí No. 1 extiende la vigencia del Contrato.

14. Que en virtud de las anteriores consideraciones las Partes celebran el presente Otrosí No. 1 al Contrato el cual se regirá por las cláusulas que se establecen a continuación.

CLÁUSULAS

PRIMERA: - PRÓRROGA- . PRÓRROGA- . Las Partes acuerdan en prorrogar el Plazo de Prestación del Servicio por un término de tres (03) meses adicionales al término de duración inicialmente convenido, esto es hasta el día treinta (30) de noviembre de 2014.

SEGUNDA– Modificación de la Cláusula5 en sus secciones 5.04 de Valor y Forma de Pago del Servicio y 5.06 Ajustes en la Facturación por Servicio, la cual quedará así:

OTROSI No.1 Contrato DC-Contrato de Transporte de Crudo-009-2013Página No. 2

“Sección 5.04 Pago y Facturación:

(e) Modalidad, Periodicidad y Plazo para el Pago: El REMITENTE se obliga irrevocable e incondicionalmente a: (i) pagar la Tarifa por el Servicio bajo la modalidad Utilice y Pague establecida en este Contrato, en forma mensual, dentro de los treinta (30) Días siguientes a la fecha en que CENIT emita la factura por la prestación del Servicio.

(f) Moneda de Pago: Los pagos serán realizados en pesos colombianos. El valor de pago se determinará tomando como base la Tarifa del Servicio correspondiente en dólares y se liquidará a la Tasa Representativa del Mercado (TRM) oficial certificada por la Superintendencia Financiera del primer día del mes de prestación de Servicio.

(g) Lugar del Pago: El REMITENTE deberá efectuar el pago mediante consignación o transferencia en cualquiera de las cuentas bancarias que CENIT, como su titular, le indique al REMITENTE en cada factura.

(h) Facturación: CENIT enviará al REMITENTE a más tardar el día veinte (20) de cada Mes de Operación, la factura con la cantidad que el REMITENTE debe pagar por concepto del Servicio con base en la nominación realizada por el REMITENTE y aceptada por CENIT para el Mes de Operación respectivo.”

“Sección 5.06 Ajustes en la facturación por Servicio:

(c) CENIT realizará ajustes a la facturación con base en los volúmenes “Gross Standard Volume”, reportados en la hoja de transporte de la CVC de cada Oleoducto y certificados por el inspector independiente en el Punto de Entrada del Oleoducto.

(d) CENIT realizará ajustes a la facturación con base en los volúmenes facturados y los volúmenes efectivamente transportados. Si como resultado del ajuste a que se refiere este numeral se establece que el REMITENTE pagó en exceso por el Servicio, CENIT compensará al REMITENTE generando una nota créditopor los montos pagados en exceso a favor del REMITENTE a ser acreditada en la facturación emitida por concepto de servicios prestados bajo este o bajo otros contratos entre el REMITENTE y CENIT. En caso de que el Plazo de Prestación del Servicio bajo el presente Contrato hubiera concluido o no exista otra relación contractual entre CENIT y el REMITENTE, CENIT devolverá el valor cobrado en exceso dentro de los treinta (30) días hábiles siguientes al reconocimiento por parte de CENIT. Si por el contrario, como resultado del ajuste al que se refiere esta sección se establece que el REMITENTE pagó un monto menor al que correspondería por concepto de volúmenes efectivamente transportados, CENIT emitirá la correspondiente factura de ajuste, la cual deberá ser cancelada por el REMITENTE dentro de los treinta (30) Días siguientes a la fecha de emisión de la misma, utilizando la TRM del primer día de mes de prestación del Servicio al cual corresponde el ajuste, la TRM debe estar certificada por la Superintendencia Financiera o entidad que haga sus veces.”

TERCERAGARANTÍA: El REMITENTE, en un plazo no mayor a diez (10) días calendario contados a partir de la Fecha de Firma del presente Otrosí No. 1 al Contrato se obliga a tramitar, obtener y entregar a CENIT la modificación de la Garantía otorgada bajo el Contrato ajustándolaen su vigencia y monto de conformidad con la extensión del Plazo de Prestación del Servicio acordada mediante el presente Otrosí No. 1, en los términos y condiciones establecidos en la Cláusula Sexta del Contrato.

OTROSI No.1 Contrato DC-Contrato de Transporte de Crudo-009-2013Página No. 3

CUARTAO– ALCANCE DEL PRESENTE OTROSI: El presente Otrosí No.1 al Contrato no constituye novación del mismo el cual se encuentra en vigencia, excepto por lo expresamente modificado en virtud de este Otrosí No.1. En caso de contradicción entre lo establecido en el Contrato y lo previsto en el presente Otrosí No. 1, o ante la existencia de un vacío o inconsistencia, las Partes, en virtud del principio de la buena fe y empleando sus mejores esfuerzos, se obligan a reajustarlo o a realizar los actos que sean necesarios para su correcto cumplimiento.

El presente Otrosí se perfecciona con su suscripción por las Partes a los veintinueve (29) días del mes de Agosto de 2014

CENIT

     /s/ Eugenio Gomez Hoyos    

EUGENIO GÓMEZ HOYOS

C.C. No. 79.121.780 of Fontibón

General Attorney

EL REMITENTE

     /s/ Manuel Buitrago                 

MANUEL BUITRAGO

C.C. 72.191.666

 Legal Representative

  /s/ Alejandra Escobar Herrera    

ALEJANDRA ESCOBAR HERRERA

C.C. 52.646.943 of Bogotá

 Legal Representative

OTROSI No.1 Contrato DC-Contrato de Transporte de Crudo-009-2013Página No. 4

EX-10.7

Free English translation of Spanish language document

Exhibit 10.7

Execution DateCity and Date	Bogotá D. C. the 29th of August of 2014
Addendum No. 1	Crude Oil Transportation Agreement - DC - 018 - 2013

SENDER	PETROLIFERA PETROLEUM (COLOMBIA) LIMITED
NIT	900.139.306-1

OPERATOR	CENIT TRANSPORTE Y LOGÍSTICA DE HIDROCARBUROS S. A. S
NIT	900.531.210 - 3

PURPOSE Service of transportation of liquid hydrocarbons on the Orito - Tumaco Pipeline (OTA)

This Addendum No. 1 to the Contract for the Transportation of Crude Oil on the Orito - Tumaco Pipeline entered into ton the 31^st of August of 2013 (the “Agreement”), is entered into on the 29^th day of the month of August of 2014 (“Execution Date”) by:

(1) CENIT TRANSPORTE Y LOGÍSTICA DE HIDROCARBUROSS. A. S., s a Colombian commercial simplified shares’ company, domiciled in the city of Bogotá, incorporated by private document of the 15^th of June of 2012 and registered in the commercial record on the same date, with commercial registration number No. 02224959 (hereinafter, “CENIT” or the Transporter”), legally represented by Eugenio Gómez Hoyos, identified with the Colombian I. D. Card No. 79.121.780 of Fontibón acting in his capacity as General Attorney by virtue of the power of attorney granted by public deed No. 1910 of the 3^rd of July of 2013 of Notary 51 of the city of Bogotá representative duly empowered to enter into this act; and

(2) PETROLIFERA PETROLEUM (COLOMBIA) LIMITED, a company organized and existing according to the laws of Cayman Islands acting through its Colombian branch domiciled in Bogotá, established by public deed number 1682 of the 2^nd of March of 2007 before the 6^th Notary of the city of Bogotá (the “SENDER”) legally represented by MANUEL BUITRAGO VIVES, of legal age, domiciled in the city of Bogotá, identified with Colombian I. D. Card No. 72.191.666 of Barranquilla and by ALEJANDRA ESCOBAR HERRERA,of legal age, domiciled in the city of Bogotá, identified with Colombian I. D. Card No. 52.646.943 of Usaquén, acting in their capacity as Legal Representatives, duly empowered to enter into this agreement, as can be verified in the respective Certificate of Existence and Incumbency,

CENIT and the SENDER may also be individually called a “Party” or collectively the “Parties”.

This Addendum No. 1 to the Agreement his entered into after the following:

ADDENDUM No.1 Contrato DC – Crude Oil Transportation Agreement - 018 - 2013Page No. 1

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CONSIDERATIONS

1. Whereas, the Agreement, according to the terms set forth in it, was executed by the Parties on the 31^st of August of 2013 and it is in full force, according to the terms initially agreed in it, until the 30^th of August of 2014.

2. Whereas, the purpose of the Agreement is the provision of the Service of Transportation of Crude Oil Owned by the SENDER on the Orito – Tumaco Pipeline owned by CENIT (the “Pipeline”).

3. Whereas, according to the provisions of Section 4.02 of the Agreement, the Parties may extend the Term for the Provision of the Service by executing a document before the date of termination of the Agreement.

4. Whereas, the Parties have expressed their interest on extending the Term for the Provision of the Service in the Agreement for a period of three (03) months as from the 31^st of August of 2014, namely until the 30^th of November of 2014

5. Whereas, the Parties have also agreed to amend Clause 5 of the Agreement, in sections 5.04 - Payment and Invoicing and 5.06 - Adjustments to the Invoicing of the Service, in order to adjust the terms and conditions related to the Representative Market Rate (TRM) applicable to the payment in Colombian pesos of the Fee for the provision of the Service.

6. Whereas because of the extension of the term of the Agreement made by virtue of this Addendum No. 1, it is necessary for the SENDER to amend and submit duly adjusted, the Guarantee furnished to CENIT in the terms set forth in the Agreement, for the same to comprise and cover the period fir which this Addendum No. 1 extends the term of the Agreement.

7. Whereas, by virtue of the foregoing considerations the Parties enter into this Addendum No. 1 to the Agreement, which will be governed by the clauses set forth below.

CLAUSES

FIRST - EXTENSION - The Parties agree to extend the Term for the Provision of the Service for an additional term of three (03) months, namely until the thirtieth (30^th) of November of 2014.

SECOND: – Amendment of Clause 5, sections 5.04 - Amount and Terms of Payment of the Service and 5.06 – Adjustments in the Invoicing of the Service, which shall now read as follows:

“Section 5.04 - Payment and Invoicing:

ADDENDUM No.1 Contrato DC – Crude Oil Transportation Agreement - 018 - 2013Page No. 2

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(a) Modality, Frequency and Term for the Payment: The SENDER irrevocably and unconditionally agrees to: (i) pay the Fee for the Service under the modality of Use and Pay established in this Agreement, on a monthly basis, within thirty (30) days after the date in which CENIT issues the invoice for the provision of the Service.

(b) Currency of Payment: The payments will be made in Colombian pesos. The amount payable will be determined based on the Service Fee certified in dollars and it will be calculated using the official Representative Market Rate (TRM) certified by the Financial Superintendence of the first day of the month of provision of the Services.

(c) Place of Payment: The SENDER must make the payment by bank deposit or transfer into any of the bank accounts that CENIT, as the holder, informs to the SENDER in each invoice.

(d) Invoicing: CENIT will send to the SENDER no later than on the twentieth (20^th) day of each Month of Operation, the invoice with the amount that the SENDER must pay for the Service based on the nomination made by the SENDER and accepted by CENIT for the respective Month of Operation.”

“Section 5.06 - Adjustments of the Invoicing of the Service:

(a) CENIT will make adjustments to the invoicing based on the “Gross Standard Volume”, reported in the CVC’s transportation sheet of each Pipeline and certified by the independent inspector at the Pipeline’s Point of Entry.

(b) CENIT will make adjustments to the invoicing based on the volumes invoiced and on the volumes actually transported. If as a result of the adjustment mentioned in this item it is established that the SENDER paid in excess for the Service, CENIT will compensate the SENDER generating a credit note for the excess amounts paid in favor of the SENDER to be credited in the invoicing issued for the services provided under this Agreement or under other agreements between the SENDER and CENIT. In case that the Term for the Provision of the Service under this Agreement has ended or if there are no other contractual relationships between CENIT and the SENDER, CENIT will pay back the excess amount charged within thirty (30) business Days after the acknowledgement by CENIT. If, on the contrary, as a result of the adjustment the subject matter of this Section it is established that the SENDER paid an amount lower than the one that would correspond for the volumes actually transported, CENIT will issue the respective adjustment invoice, which will be paid by the SENDER within thirty (30) Days after the date of issuance thereof, using the TRM of the first day of provision of the Service to which the adjustment corresponds; the TRM must be duly certified by the Financial Superintendence or the entity that takes its place.”

THIRD -GUARANTEE: THE SENDER, in a term of no more than ten (10) calendar days as from the Date of Execution Date of this Addendum No. 1 to the Agreement, agrees to apply for, obtain and deliver to CENIT the amendment on the Guarantee granted under the Agreement adjusting its term and amount according to the extension of the Term for the Provision of the Service agreed in this Addendum No. 1, in the terms and conditions set forth in the Sixth Clause of The Agreement.

FOURTH– COPE OF THIS ADDENDUM: This Addendum No. 1 to the Agreement is not a novation thereof, as it is in full force and effect excepting for what was expressly amended by virtue of this Addendum No. 1. In case of contradiction between the provisions of the Agreement and the provisions of this Addendum

ADDENDUM No.1 Contrato DC – Crude Oil Transportation Agreement - 018 - 2013Page No. 3

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No. 1, or faced with a void or inconsistency, the Parties, by virtue of the principle of good faith and using their best efforts, commit to readjust it or to carry out any acts that may be necessary for its correct compliance.

This Addendum is perfected with the signature of the Parties on the twenty ninth (29^th) day of the month of August of 2014.

CENIT

     /s/ Eugenio Gomez Hoyos    

EUGENIO GÓMEZ HOYOS

C.C. No. 79.121.780 of Fontibón

General Attorney

THE SENDER

     /s/ Manuel Buitrago                 

MANUEL BUITRAGO

C.C. 72.191.666

 Legal Representative

  /s/ Alejandra Escobar Herrera    

ALEJANDRA ESCOBAR HERRERA

C.C. 52.646.943 of Bogotá

 Legal Representative

ADDENDUM No.1 Contrato DC – Crude Oil Transportation Agreement - 018 - 2013Page No. 4

Fecha de FirmaCiudad y Fecha	Bogotá D.C. 29 de agosto de 2014
Otrosí No. 1	Contrato DC-Contrato de Transporte de Crudo-018-2013

REMITENTE	PETROLIFERA PETROLEUM (COLOMBIA) LIMITED
NIT	900.139.306-1

OPERADOR	CENIT TRANSPORTE Y LOGÍSTICA DE HIDROCARBUROS S.A.S
NIT	900.531.210-3

OBJETO Servicio de transporte de hidrocarburos líquidos por el Oleoducto Orito-Tumaco (OTA)

Este Otrosí No. 1 al Contrato de Transporte de Crudo por el Oleoducto Orito - Tumaco celebrado el 31 de agosto de 2013 (el “Contrato”), se suscribe a los 29 días del mes de agosto de 2014 (“Fecha de Firma”) por:

(3) CENIT TRANSPORTE Y LOGÍSTICA DE HIDROCARBUROS S.A.S., sociedad colombiana de naturaleza mercantil, del tipo de las sociedades por acciones simplificada, con domicilio en la ciudad de Bogotá, constituida mediante documento privado de junio 15 de 2012 e inscrita en el registro mercantil en la misma fecha, con matrícula mercantil No. 02224959 (“CENIT”o el “Transportador”), representada legalmente por Eugenio Gómez Hoyos, mayor de edad, domiciliado en la ciudad de Bogotá, identificado con la cédula de ciudadanía No. 79.121.780 de Fontibón, quien actúa en su condición de Apoderado General en virtud del poder conferido mediante Escritura Pública No. 1910 de julio 3 de 2013 de la Notaría 51 del Círculo de Bogotá, debidamente facultado para la celebración de este acto; y

(4) PETROLIFERA PETROLEUM (COLOMBIA) LIMITED, sociedad constituida y organizada de conformidad con las leyes de las Islas Cayman, actuando a través de sucursal debidamente establecida en Colombia mediante escritura pública número 1682 de marzo 2 de 2007 otorgada en la Notaría 6ª del Círculo de Bogotá (el “REMITENTE”), representada legalmente por MANUEL BUITRAGO, mayor de edad, domiciliado en la ciudad de Bogotá, identificado con la cédula de ciudadanía No. 72.191.666 de Barranquilla y por ALEJANDRA ESCOBAR HERRERA, mayor de edad, domiciliada en la ciudad de Bogotá, identificada con la cédula de ciudadanía No 52.646.943 de Usaquén, quienes actúan en su condición de Representantes Legales, debidamente facultados para la celebración de este acto conforme se puede verificar en el Certificado de Existencia y Representación Legal respectivo,

OTROSI No.1 Contrato DC-Contrato de Transporte de Crudo-018-2013Página No. 1

CENIT y el REMITENTEtambién podrán ser denominados individualmente como la “Parte” o conjuntamente como las “Partes”.

El presente Otrosí No. 1 al Contrato, se suscribe previas las siguientes:

CONSIDERACIONES

8. Que el Contrato, conforme los términos en él previstos, fue ejecutado por las Partes el 31 de agosto de 2013 y se encuentra en vigencia, conforme el término de duración inicialmente pactado, hasta el día 30 de agosto de 2014.

9. Que el objeto del Contrato consiste en la prestación del Servicio de Transporte de Crudo de Propiedad del REMITENTE por el Oleoducto Orito – Tumaco, propiedad de CENIT. (el “Oleoducto”).

10. Que de conformidad con lo dispuesto en la Sección 4.02 del Contrato, las Partes podrán prorrogar el Plazo de Prestación del Servicio mediante la suscripción de un documento con anterioridad a la fecha de terminación del Contrato.

11. Que las Partes han manifestado su interés en extender el Plazo de Prestación del Servicio del Contrato, por un término de tres (03) meses contados a partir del 31 de agosto de 2014, es decir hasta el 30 de noviembre de 2014

12. Que, adicionalmente las Partes han acordado modificar la Cláusula 5 del Contrato, en sus secciones 5.04 - Pago y Facturación y 5.06 - Ajustes en la Facturación por Servicio, con el objeto de ajustar los términos y condiciones relacionados con la Tasa Representativa del Mercado (TRM) aplicable al pago en pesos colombianos de la Tarifa por la prestación del Servicio.

13. Que, con ocasión de la extensión a la vigencia del Contrato que se pacta en virtud del presente Otrosí No. 1, es necesario que el REMITENTE modifique y entregue debidamente ajustada la Garantía otorgada a CENIT en los términos previstos en el Contrato a fin de que la misma comprenda y ampare el periodo por el cual este Otrosí No. 1 extiende la vigencia del Contrato.

14. Que en virtud de las anteriores consideraciones las Partes celebran el presente Otrosí No. 1 al Contrato el cual se regirá por las cláusulas que se establecen a continuación.

CLÁUSULAS

PRIMERA: - PRÓRROGA- . PRÓRROGA- . Las Partes acuerdan en prorrogar el Plazo de Prestación del Servicio por un término de tres (03) meses adicionales al término de duración inicialmente convenido, esto es hasta el día treinta (30) de noviembre de 2014.

SEGUNDA– Modificación de la Cláusula5 en sus secciones 5.04 de Valor y Forma de Pago del Servicio y 5.06 Ajustes en la Facturación por Servicio, la cual quedará así:

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“Sección 5.04 Pago y Facturación:

(e) Modalidad, Periodicidad y Plazo para el Pago: El REMITENTE se obliga irrevocable e incondicionalmente a: (i) pagar la Tarifa por el Servicio bajo la modalidad Utilice y Pague establecida en este Contrato, en forma mensual, dentro de los treinta (30) Días siguientes a la fecha en que CENIT emita la factura por la prestación del Servicio.

(f) Moneda de Pago: Los pagos serán realizados en pesos colombianos. El valor de pago se determinará tomando como base la Tarifa del Servicio correspondiente en dólares y se liquidará a la Tasa Representativa del Mercado (TRM) oficial certificada por la Superintendencia Financiera del primer día del mes de prestación de Servicio.

(g) Lugar del Pago: El REMITENTE deberá efectuar el pago mediante consignación o transferencia en cualquiera de las cuentas bancarias que CENIT, como su titular, le indique al REMITENTE en cada factura.

(h) Facturación: CENIT enviará al REMITENTE a más tardar el día veinte (20) de cada Mes de Operación, la factura con la cantidad que el REMITENTE debe pagar por concepto del Servicio con base en la nominación realizada por el REMITENTE y aceptada por CENIT para el Mes de Operación respectivo.”

“Sección 5.06 Ajustes en la facturación por Servicio:

(c) CENIT realizará ajustes a la facturación con base en los volúmenes “Gross Standard Volume”, reportados en la hoja de transporte de la CVC de cada Oleoducto y certificados por el inspector independiente en el Punto de Entrada del Oleoducto.

(d) CENIT realizará ajustes a la facturación con base en los volúmenes facturados y los volúmenes efectivamente transportados. Si como resultado del ajuste a que se refiere este numeral se establece que el REMITENTE pagó en exceso por el Servicio, CENIT compensará al REMITENTE generando una nota créditopor los montos pagados en exceso a favor del REMITENTE a ser acreditada en la facturación emitida por concepto de servicios prestados bajo este o bajo otros contratos entre el REMITENTE y CENIT. En caso de que el Plazo de Prestación del Servicio bajo el presente Contrato hubiera concluido o no exista otra relación contractual entre CENIT y el REMITENTE, CENIT devolverá el valor cobrado en exceso dentro de los treinta (30) días hábiles siguientes al reconocimiento por parte de CENIT. Si por el contrario, como resultado del ajuste al que se refiere esta sección se establece que el REMITENTE pagó un monto menor al que correspondería por concepto de volúmenes efectivamente transportados, CENIT emitirá la correspondiente factura de ajuste, la cual deberá ser cancelada por el REMITENTE dentro de los treinta (30) Días siguientes a la fecha de emisión de la misma, utilizando la TRM del primer día de mes de prestación del Servicio al cual corresponde el ajuste, la TRM debe estar certificada por la Superintendencia Financiera o entidad que haga sus veces.”

TERCERAGARANTÍA: El REMITENTE, en un plazo no mayor a diez (10) días calendario contados a partir de la Fecha de Firma del presente Otrosí No. 1 al Contrato se obliga a tramitar, obtener y entregar a CENIT la modificación de la Garantía otorgada bajo el Contrato ajustándolaen su vigencia y monto de conformidad con la extensión del Plazo de Prestación del Servicio acordada mediante el presente Otrosí No. 1, en los términos y condiciones establecidos en la Cláusula Sexta del Contrato.

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CUARTAO– ALCANCE DEL PRESENTE OTROSI: El presente Otrosí No.1 al Contrato no constituye novación del mismo el cual se encuentra en vigencia, excepto por lo expresamente modificado en virtud de este Otrosí No.1. En caso de contradicción entre lo establecido en el Contrato y lo previsto en el presente Otrosí No. 1, o ante la existencia de un vacío o inconsistencia, las Partes, en virtud del principio de la buena fe y empleando sus mejores esfuerzos, se obligan a reajustarlo o a realizar los actos que sean necesarios para su correcto cumplimiento.

El presente Otrosí se perfecciona con su suscripción por las Partes a los veintinueve (29) días del mes de Agosto de 2014

CENIT

     /s/ Eugenio Gomez Hoyos    

EUGENIO GÓMEZ HOYOS

C.C. No. 79.121.780 of Fontibón

General Attorney

EL REMITENTE

     /s/ Manuel Buitrago                 

MANUEL BUITRAGO

C.C. 72.191.666

 Legal Representative

  /s/ Alejandra Escobar Herrera    

ALEJANDRA ESCOBAR HERRERA

C.C. 52.646.943 of Bogotá

 Legal Representative

OTROSI No.1 Contrato DC-Contrato de Transporte de Crudo-018-2013Página No. 4

EX-10.8

EXHIBIT 10.8

CONSULTING SERVICES AGREEMENT

BETWEEN:

GRAN TIERRA ENERGY CANADA ULC

- and -

SHANE O’LEARY

SEPTEMBER 11, 2014

CONTRACT NO: CSA – 14 – 547

CONSULTING SERVICES AGREEMENT

THISAGREEMENT made as of September 11, 2014 and shall become effective on the commencement of the Initial Term (as that term is defined in Schedule “A” hereto) .

BETWEEN:

GRAN TIERRA ENERGY CANADA ULC,

a body corporate organized under the laws of Alberta
(hereinafter referred to as the “Company”)

- and -

SHANE O’LEARY

an individual residing in the province of Alberta

(hereinafter referred to as the “Contractor”)

WHEREAS the Company has requested the Contractor to perform certain services as hereinafter set forth and the Contractor has agreed to perform such services on and subject to the terms and conditions hereinafter contained.

NOWTHEREFORE in consideration of the mutual covenants and conditions as hereinafter contained, the parties hereto agree as follows:

ARTICLE 1
NATURE OF WORK

1.1Description of Services

Subject to the terms and conditions of this Agreement, the Contractor shall perform the services set forth and described in Schedule “A” hereto and shall perform such other services as agreed to by the Contractor and the Company (the “Services”).

1.2Standard of Service

The Contractor warrants that it has the competency and skill necessary to perform the Services and shall utilize professional skill, diligence and care to ensure that all Services are scheduled and completed to the satisfaction of the Company and shall provide the expertise and any other services not specifically mentioned herein, but which by reason of its capability, knows to be necessary to ensure that the best interests of the Company are maintained. Contractor shall, in all respects, observe, be bound by and comply with all laws and regulations applicable in the Zone of Operations. Contractor shall, in all respects, observe, be bound by and comply with all laws and regulations applicable in the Zone of Operations in which Services are being provided.

1.3Independent Contractor

It is understood and agreed that this Agreement does not create the relationship of employer and employee between the Company and the Contractor nor any relationship (employer and employee or otherwise) between the Company and the Contractor, and that the Contractor is an independent contractor. The Contractor shall be solely responsible for the performance of the Services and shall have the exclusive direction and control over the conduct of same. The Contractor agrees that it is not, nor will it, represent itself to be an employee of the Company. Accordingly, the Contractor will not be eligible to participate in any employee benefit plans including, without limitation, life insurance, health care, disability income, or dental plans.

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1.4Timely Provision of Services

The Contractor shall be free to determine the hours of the day during which it will perform the Services, provided, however, that the Contractor agrees to the extent possible to endeavor to make the Dedicated Personnel available to the employees of the Company at regularly scheduled hours as agreed by the Contractor. Further, where required for the efficient and proper provision of the Services, Contractor shall make himself available to provide the Services at the place and time requested by Company.

1.5Confidentiality Undertaking

The Contractor hereby agrees and acknowledges that in the course of performing the Services, it will have access to and will be entrusted with detailed confidential information concerning the business of the Company and agrees that the disclosure of any such confidential information to competitors of the Company or to the general public would be highly detrimental to the best interests of the Company. The Contractor acknowledges and agrees that the right to maintain the confidentiality of such confidential information constitutes proprietary rights which the Company is entitled to protect. Accordingly, the Contractor covenants and agrees with the Company that, save with the written consent of the Company, it will not, either during the term of this Agreement, or at any time thereafter, disclose any of such confidential information to any person nor shall it use the same for any purpose other than the purposes of performing the Services. The Contractor agrees that all restrictions contained in this clause are reasonable and valid in the circumstances and all defenses to the strict enforcement thereof by the Company are hereby waived by the Contractor.

1.6Discoveries and Disclosure

The Contractor agrees that any and all inventions, discoveries, programs, processes, designs or other intellectual property relating in any way to or arising out of the Services contemplated hereunder (whether or not such item may be protectable at law or at equity by way of patent, trademark, copyright, industrial design registration or in any other way whatsoever) made, created, conceived or improved while engaged hereunder shall be the sole, absolute and exclusive property of the Company. The Contractor agrees to disclose the existence of such item(s) promptly to the Company and to execute upon request such written assignment or other document of whatsoever nature as may be necessary, in the opinion of the Company, to transfer or vest in the Company the entirety of the Contractor’s interest in same.

1.7Travel, Documentation and Visas

If the Contractor is required to travel in order to provide the Services, to promote cost effective travel, all travel arrangements will be coordinated and reserved in-house with the Company designated agency unless otherwise agreed by the Company. If the Contractor is traveling internationally, he must possess, and produce, upon request, a valid passport with no travel limitations and that is not due to expire within six (6) months of the anticipated travel dates. It is the Contractor’s responsibility to ensure that he possess all valid visas and other entry and work permits that are required for the provision of the Services in accordance with applicable laws. Upon request, the Company shall provide reasonable assistance with coordinating the vaccinations and documentation required for travel and entry into any Zone of Operations outside the Point of Origin; provided, however, that such assistance shall in no way alter the obligation of the Contractor in this regard or result in any liability to the Company. The Company shall not be responsible for any loss incurred by the Contractor attributable to any Government decisions made regarding authority to travel.

1.8International Security and Evacuation

In the event the Contractor is required to provide Services in a Zone of Operations outside the Point of Origin, the Company or its affiliates shall provide security to the Contractor at a level similar to that provided by the Company or its affiliates for their own Calgary, Alberta based employees that are in that Zone of Operations. Prior to departure, the Contractor must provide the information requested by the Company for security purposes.

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The Company may, at its sole discretion, but shall not be obligated to assist the Contractor with security emergency evacuation, medical treatment, or medical evacuation. For certainty, it is acknowledged that in the event of any personal injury, death, loss, costs, damage, expense or legal fees which the Contractor may suffer, sustain, pay or incur, directly or indirectly arising from the Company or its affiliates providing any assistance aforementioned, the provisions of Clause 4.1 shall apply.

1.9Insurance

Without limiting its obligations or liabilities herein, the Contractor shall, at its sole cost and expense, obtain and continuously carry during the term of this Agreement, the following insurance coverage with reputable and reliable insurers that are acceptable to the Company:

(a) International Medical Insurance and Medical Evacuation Coverage

Should the Contractor be required to travel outside of Canada on behalf of the Company, accident and medical insurance coverage for bodily injury, death and disability in an amount of not less than two hundred and fifty thousand dollars ($250,000.00) per person per occurrence and international medical evacuation coverage reasonably satisfactory to the Company.

(b) Automobile

Where Contractor operates an automobile in the course of performing the Services, Contractor shall obtain and maintain Automobile Liability Insurance covering all motor vehicles, owned or non-owned, operated, used and/or hired in connection with the Services with an inclusive bodily injury, death and property damage limit per occurrence of not less than two million dollars ($2,000,000.00).

1.10Restriction to Trade in Securities

(a)        For the purposes of this Section 1.10, “Material Fact” shall mean any information that refers to the Company, Gran Tierra Energy Inc., or any of their affiliates, their business or any securities issued or guaranteed by Gran Tierra Energy Inc., the knowledge of which, because of its nature, may influence the liquidity, price or listing of the issued securities.

(b)         Given the possibility that the Contractor may have access to Material Facts concerning the business and affairs of the Company, Gran Tierra Energy Inc., or any of their affiliates, and given that Gran Tierra Energy Inc. is the ultimate parent of the Company, the Contractor and its subcontractors, if any shall not:

(i)           purchase or sell the securities of Gran Tierra Energy Inc. with knowledge of a Material Fact which has not been generally published by issuance of a press release or other public announcement; or

(ii)         inform, other than in the necessary course of the performance of the Services, any other person or entity about a Material Fact before it has been generally publicized.

1.11Compliance

Notwithstanding the independent contractor status of the Contractor, the Contractor shall comply with all Company (or where the Company is not Gran Tierra Energy Inc, all Gran Tierra Energy Inc.) policies and procedures (including, without limitation, those relating to the environment, health, safety and security) (“Corporate Policies”) during the performance of the Services. A copy of certain of such Corporate Policies are attached hereto in Schedule “B” (any reference to “Consultants” in such Corporate Policies are deemed to be a reference to Contractors) and certain others can be accessed at www.grantierra.com. The Contractor shall also comply with all applicable laws and regulations in the performance of the Services. Any cost or claims of any nature arising as a result of breach by the Contractor of the Corporate Policies or laws or regulations in the performance of the Services, whether caused by negligence or otherwise, shall, notwithstanding anything contained elsewhere in this Agreement, be borne solely by the Contractor. The Contractor shall indemnify the Company and its officers, directors and employees from and against any costs incurred or liabilities imposed on them arising out of such breach in performance of the Services.

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ARTICLE 2
PAYMENT TO CONTRACTOR

2.1Payments

The Company shall pay the Contractor for performance of the Services in the manner set forth and described in Schedule “A” hereto.

2.2Invoicing

The Contractor shall invoice the Company monthly, within thirty (30) days of the last day of each month for the Services conducted in that month, and payment to the Contractor shall be made within thirty (30) days of receipt of such invoice.

(a) All invoices, correspondence and time sheets must reference CONTRACT NO: CSA – 14 - 547 recommended invoice format should itemize separately the following information:

(i) fees for services with respect to each project for which Services were provided and segregated by the Zone of Operations, supported by timesheets showing correct project coding;

(ii) amount for per diem or other per unit allowances, if applicable, with respect to each project for which Services were provided and segregated by the Zone of Operations;

(iii) reimbursable expenses with original receipts with respect to each project for which Services were provided and segregated by the Zone of Operations;

(iv) GST number, if applicable; and

(v) total of invoice.

In the event these requirements are not met, the invoices will be returned.

(b) All invoices must be sent, together with time sheets, receipts and other supporting documents directly to:

Gran Tierra Energy Inc.

300, 625 – 11^th Avenue S.W.

Calgary, Alberta T2R 0E1

Attention: Dana Coffield

Note: Failure to submit invoices to the above location and department may result in a delay of payment.

2.3Reimbursements

The Contractor shall invoice the Company, and the Company shall reimburse the Contractor, for reasonable travel charges not pre-paid for by the Company. This would include but not be limited to reasonable local (i.e. services or products consumed or rendered in a Zone of Operations outside the Point of Origin) communication, transportation, accommodation and meal charges; provided, however, that where pursuant to Schedule “A” Company is providing accommodations and meals, or a per diem in lieu thereof, Contractor shall not be reimbursed for accommodation and meal charges pursuant to this Article. Invoices for expenses chargeable to the Company hereunder shall be supported by appropriate original receipts less any cash advances provided by the Company to the Contractor.

2.4Taxes

The Contractor shall be responsible for all taxes payable as a result of its conduct of the Services or which arise out of this Agreement including, without limitation, local taxes, corporation taxes, foreign contractors tax, income tax, and personal income taxes which are related to or assessed upon the profits or assumed profits of Contractor, now or hereafter levied or imposed, and arising directly or indirectly out of the performance of the Services under this Agreement. Contractor shall indemnify and hold harmless the Company and its joint

5

venture partners from all responsibility, liability and risk for the payment of such taxes and including interest or penalty arising due to a failure to pay same by Contractor.

If the Company should ever be required by any law, rule, regulation, governmental authority (including any administrative tribunal) or any judicial or arbitral authority at any time to withhold and/or pay on the Contractor’s behalf any assessments such as income tax, unemployment insurance premiums, pension plan contributions, health care contributions, or worker’s compensation contributions, or any claims in the nature of holiday pay, vacation pay or severance pay, the Contractor will, forthwith upon notice, reimburse the Company for such payment, together with interest and any penalties applicable to such assessments and all expenses (including legal expenses on a solicitor and client basis) incurred by the Company with respect to proceedings relating thereto. The Contractor’s obligations under this clause will survive the termination/expiration of this Agreement.

2.5Books and Records

The Contractor shall maintain during the term of this Agreement full and accurate records with respect to all Services performed, fees charged and disbursements incurred, and shall preserve such records for a period of not less than three (3) years from the expiry of this Agreement. The Company or its designate has the right, at all reasonable times during normal business hours, to inspect all such records as may be necessary to verify or audit the calculation of such fees or disbursements or otherwise.

ARTICLE 3
TERM

3.1Term

This Agreement shall be for the Initial Term as specified in Schedule “A” and for any extension agreed in writing by the Parties; provided however that the Company may forthwith terminate this Agreement at any time for cause, which shall include, without limitation:

(a) failure to perform the Services in accordance with this Agreement;

(b) falsification or misrepresentation of any information related to this Agreement; or

(c) inability of the Contractor to perform the Services by reason of a physical or mental disability.

ARTICLE 4
WAIVER AND INDEMNITY

4.1Liability

Except as may be otherwise expressly provided in this Agreement, the Contractor and the Company agree that each party shall, with respect to:

(a) itself, its servants, agents, employees, invitees and subcontractors;

(b) the property of its servants, agents, employees, invitees and subcontractors; and

(c) its own property;

be liable for all losses, costs, damages, expenses and legal fees which it or they may suffer, sustain, pay or incur directly or indirectly arising from or in connection with this Agreement on account of bodily injury to or death of such persons, or damage to such persons, or loss of or damage to such property, and, in addition, indemnify the other party against all actions, proceedings, claims, demands, losses, costs, damages, expenses and legal fees whatsoever which may be brought against or suffered by such or which such party may sustain,

6

pay, or incur, directly or indirectly arising from, or in connection with this Agreement on account of bodily injury to or death of such person, or loss of or damage to such property.

This liability and indemnity shall apply without limit and without regard to cause or causes, including, without limitation, the negligence, whether sole, concurrent, gross, active, passive, primary or secondary, or the willful act or omission, of either party or any other person or otherwise. With respect to the Company, this indemnity shall apply to its parent, subsidiaries, affiliates and their respective directors, officers, employees, agents, representatives, invitees, contractors and subcontractors.

4.2Third Party Liability

Except as may be otherwise provided in this Agreement, the Company shall protect, indemnify and save harmless the Contractor, and its directors, officers, employees, agents, representatives, invitees and subcontractors, and, at the Contractor’s request, investigate and defend such entities from and against all claims, demands and causes of action, of every kind and character, without limitation, arising in favour of or made by third parties, on account of bodily injury, death or damage to or loss of their property resulting from any negligent act or willful misconduct of the Company.

Except as may be otherwise provided in this Agreement, the Contractor shall protect, indemnify and save harmless the Company, its parent, subsidiaries, affiliates and their respective directors, officers, employees, agents, representatives, invitees and subcontractors and, at the Company’s request, investigate and defend such entities from and against all claims, demands and causes of action, of every kind and character, without limitation, arising in favour of or made by third parties on account of bodily injury, death or damage to or loss of their property resulting from any negligent act or willful misconduct of the Contractor.

4.3Survival of Indemnities

The terms of this Article 4 shall survive any termination or expiry of this Agreement.

ARTICLE 5
NOTICES

5.1Notices

Any notice required to be given by either party under this Agreement may be sufficiently given if personally delivered, mailed by prepaid registered letter or faxed in the case of the Company or emailed in the case of the Contractor to the parties at their respective addresses as follows:

The Company:            Gran Tierra Energy Canada ULC

c/o Gran Tierra Energy Inc.

300, 625 – 11^th Avenue SW

Calgary, Alberta, Canada, T2R 0E1

Fax:         +1 403 265-3242

Attention:     General Counsel

The Contractor:            Shane O’Leary

4007 – 5^th Street SW

Calgary, Alberta T2S 2C9

email:        shaneoleary363@gmail.com

Attention:    Shane O’Leary

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Such notice shall be deemed to have been given to and received by the addressee in the case of delivery by mail on the fourteenth (14th) day after posting, in the case of personal delivery on the day of actual delivery, in the case of delivery by fax on the day of actual receipt of the fax as evidenced by a transmission report confirming such receipt and in the case of email on the day the email was sent. In times of labour strikes or slow-downs affecting mail delivery, notice shall be effective only if personally delivered or given by fax or email, as permitted herein. Any party may by notice change its designated address for delivery of notices.

ARTICLE 6
GENERAL

6.1Applicable Law

This Agreement shall be construed under the laws of the Province of Alberta, excluding any conflicts of law rules that would apply the laws of another jurisdiction. If any provision or provisions of this Agreement be illegal or unenforceable under the laws of the Province of Alberta such provision or provisions shall be considered to be deleted and the remainder of this Agreement shall continue in full force and effect.

6.2Assignment

It is agreed that the Contractor shall not assign this Agreement or the whole or any portion of the Services undertaken by it hereunder.

6.3Successors and Assigns

This Agreement shall enure to the benefit of and be binding upon the Company, its successors and assigns.

6.4Headings

The headings herein are for convenience of reference only.

6.5Time

Time shall be of the essence hereof.

6.6Entire Agreement

This Agreement supercedes any other agreement between the parties relating to the matters within and constitutes the entire Agreement between the parties.

6.7Amendment

No amendment of this Agreement shall be binding upon any party unless evidenced in writing executed by the party.

6.8Currency

All references to currency herein shall be deemed to be Canadian currency, unless otherwise indicated.

6.9Force Majeure

If any party is prevented or delayed from performing its obligations hereunder as a result of Force Majeure, such prevention or delay shall not be considered a breach of this Agreement and that party shall be relieved from its obligations for the duration of such Force Majeure, provided however that:

(a) there is a direct relation between such prevention or delay and the Force Majeure; and

(b) notice of such Force Majeure is provided to the other party specifying in reasonable detail the nature of the Force Majeure and the actions being performed to remedy same.

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The term “Force Majeure” shall mean acts of God, epidemic, flood, explosion, fire, lightning, earthquake, war, riot, civil disturbance, strike (except the strike of Personnel), Government order, decision or administrative ruling, Government inaction or any other circumstances which is unforeseeable, sudden, insurmountable and outside the control of the parties.

6.10Counterpart Execution and Delivery by Fax or Email

This Agreement may be executed by the parties in counterpart with the same effect as if the parties had signed the same document. All counterparts of this Agreement shall be construed together and shall constitute one and the same instrument. Delivery by either party of an executed counterpart of this Agreement to the other party by fax or email shall be deemed to have the same effect as the delivery of and original of this Agreement containing the original signature of such party.

INWITNESSWHEREOF the parties hereto have executed this Agreement as of the day and year first above written.

GRAN TIERRA ENERGY CANADA ULC

Per: /s/ Dana Coffield                                                  

Dana Coffield                    

Printed Name

September 26, 2014                                                      

Date Executed

SHANE O’LEARY

/s/ Shane O’Leary                

September 11, 2014                                                       

Date Executed

SCHEDULE “A”

Description of Services:

To provide assistance and advice to the President and CEO and/or the Chief Operating Officer with respect to strategy and operations of Gran Tierra Energy and its affiliates and to undertake projects with respect thereto as assigned by the President & CEO and/or the Chief Operating Officer.

Term:

Commencing at 12:00 midnight on September 30, 2014 and terminating on December 31, 2014 (the “Initial Term”) unless terminated earlier or extended by mutual agreement between the parties provided such extensions shall not exceed a period of a further three (3) months.

.

Notice Period For Termination (Clause 3.1(a)):

Ten (10) days.

Schedule:

Contractor shall provide Services for such days or hours as are requested by the Company.

Contracting Fee:

The Contractor’s fee for Services is shown in the table below on a Canadian dollar per hour basis (“Base Rate”). The Base Rate is based on the provision of Services for a one hour period and shall be prorated for any lesser period than one hour that Services are provided.

Where the Services require that the Contractor travel away from Point of Origin the compensation payable for any travel time shall be a maximum of the Base Rate for 8 hours per day irrespective of the time actually spent traveling. Contractor shall be entitled to compensation for a maximum of 8 hours travel from Point of Origin to Zone of Operations outside of Canada and a maximum of 8 hours travel from Zone of Operations outside of Canada to Point of Origin on each journey between the Point of Origin and Zone of Operations

Dedicated Personnel	Base Rate per hour	Air Transportation
Shane O’Leary	$225.00 CAD	Business Class for over 6 Hours Combined Flight Time

Class of Air Travel:

When required to travel to provide the Services, Contractor will be provided with Coach Class air transportation; provided, however, that in the circumstances so indicated in the table above the Contractor will be provided with Business Class air transportation.

Point of Origin:    Calgary, Canada

Zone of Operations:    Calgary, Canada and, if requested by Company, Colombia, Peru or Brazil

GST #:XXXX

WCB #:XXXX

SCHEDULE “B”

CORPORATE POLICIES

The Corporate Policies of Gran Tierra Energy Inc. may be found at www.grantierra.com and are deemed to be incorporated by reference and forming part of this Schedule “B”. For convenience, and without diminishing the importance of the other Corporate Policies or the obligation of the Contractor to abide by such Corporate Policies, the following are attached hereto:

1. Code of Business Conduct and Ethics;

2. Corporate Security Policy;

3. Compliance with Foreign Corrupt Practices Act; and

4. Corporate Responsibility Policy.

5. HSE Policy.

EX-10.9

Free English translation of Spanish language document

Exhibit 10.9

GUNVOR COLOMBIA CI SAS

Av. 82 No. 12-18, Oficina 401 Bogotá, Colombia

Phone +57-1 - 6227978 / 6364768

Date: the 7^th of October of 2014

ADDENDUM NO. 2 TO THE COSTAYACO CRUDE OIL SALE AND PURCHASE AGREEMENT

This Addendum (hereinafter the “Addendum”) to the Agreement (as defined below) is entered into on the 7^th of October of 2014 by and between GRAN TIERRA ENERGY COLOMBIA LTD, a limited liability company organized under the laws of the State of Utah, acting through its duly registered branch office (hereinafter the “VENDOR”), jointly represented by Adrian Coral Pantoja, identified with Colombian I. D. No. 79.301.050 and Alejandra Escobar Herrera, identified with Colombian I. D. No. 52.646.943, duly authorized to enter into this Addendum according to the Certificate of Existence and Incumbency issued by the Chamber of Commerce attached hereto, and GUNVOR COLOMBIA CI SAS, a company organized under the laws of the Republic of Colombia (hereinafter the “BUYER”), represented by Jaime Alejandro Hoyos Juliao, identified with Colombian I. D. No. 80.082.474, duly authorized to enter into this Addendum according to the written vote dated on the 30^th of November of 2012 of the sole partner of Gunvor SAS, attached hereto. The SELLER and the BUYER will be individually called the “PARTY”, and collectively “PARTIES”.

WITNESSETH:

1. WHEREAS the SELLER and the BUYER on the third day (3^rd) of December of 2012 entered into a crude oil sale and purchase agreement (hereinafter the “Agreement”) whereby it was agreed that the SELLER will be able to sell and deliver, and the BUYER must buy and charge whenever the SELLER nominates, up to a maximum quantity of 3,650 barrels of Crude Oil + 10% per day throughout the term of the Agreement.

Free English translation of Spanish language document

ADDENDUM NO. 2 TO THE COSTAYACO CRUDE OIL SALE AND PURCHASE AGREEMENT

2. WHEREAS according to Addendum No. 1 of the 22^nd of November of 2013,the PARTIESagreed to extend the term of the Contract for one (1) further year, as from the expiration of the term initially agreed.

3. WHEREAS, the PARTIES are interested in amending the Fifth Clause, among other things, to change the markers for the calculation of the price.

THEREFORE, in consideration to the premises and mutual representations, warranties, covenants, agreements and commitments established in this Addendum or referred to in it, the PARTIES agree to amend this Agreement as follows:

FIRST: The PARTIES agree to amend the Fifth Clause of the Contract, which shall be in force as from the first (1^st) day of October of 2014, and which shall read as follows:

5.     CRUDE OIL PRICE

THE PARTIES agree that the price of the Crude sold and purchased shall be calculated at the Delivery Point located in the Costayaco field in Putumayo and according to the following formula for each net barrel according to the following formula for each net barrel delivered (for the purposes of this Contract, net will mean Net Standard Volume or NSV).

The price of the Crude will be calculated such as:

P= (A + B) + X – T

The price should be calculated based on the month of cargo of the respective trucks. The amount of the price for future settlement will be BRENT FIRST MONTH as per publication / quote of Crude Oil Marketwire by Platts (code ICLL001). Marker shall be declared by THE BUYER for any of the following dates, by the latest at 4:00pm, Bogota, Colombia time, of the 15th day of each month. According to the Colombian legislation, should the 15th day of each month not be a working day, the declaration shall be made the following working day before 9 am, Bogotá, Colombia time. For all purposes related to this Agreement, Saturdays and Sundays shall not be deemed to be working days. The Marker options will be as follows:

• 1 to 15 of the month of cargo

• 15 to the 30 (31, depending on the month) of the month of cargo

• Average for the month of cargo

Where:

Free English translation of Spanish language document

ADDENDUM NO. 2 TO THE COSTAYACO CRUDE OIL SALE AND PURCHASE AGREEMENT

P = Price, stated in Dollars of the United States of America, which THE BUYER shall pay to THE VENDOR for each net barrel of crude oil loaded at the Delivery Point.

A = Value of reference: The BRENT FIRST MONTH price, as published / quoted of Crude Oil Marketwire by Platts (code ICLL001), corresponding to one of the above declared dates ranges.

B= VASCONIA DIFFERENTIAL TO FUTURES BRENT STRIP: Will be calculated as the average of the Vasconia (code AAXCB00) as quoted/published by Platts Latin American Wire, corresponding to the previous dates ranges.

X= Is the differential offered by THE BUYER, expressed in Dollars of the United States of America per net Barrel and equivalent to US$ 1 per barrel. This amount includes all of the costs incurred by THE BUYER from the Point of Receipt up to the Final Point of Delivery. Such costs include: administration, trading, treatment, cargo, unloading and final disposal both of the crude itself as well as of the additional components of the mixture received (water, sediments and impurities).

T= Is the trucking freight value. It is agreed on 0.63736 COP / km / gl gross on the Point of Receipt up to the Final Point of Delivery.

THE BUYER will make their best efforts regarding truck freight negotiation with reliable counterparties in order to try to obtain always the best trucking freight cost possible. For such purposes, the BUYER must give to the VENDOR, upon request, a description of the different efforts made aimed to obtain such prices and the different prices offered by the transportation companies, evidencing that indeed the BUYER has complied with its contractual obligation.

Each pricing element and the final price shall be calculated to three (3) decimal places; the following arithmetic rules shall be applied:

•if the fourth decimal place is five (5) or greater than five (5), then the third decimal place shall be rounded up to the next digit;

•if the fourth decimal place is four (4) or less than four (4), then the third decimal place will be unchanged.

SECOND. With the exception of the agreements of this document, all other clauses of the Agreement will remain in force in the same terms in which they were initially agreed.

Free English translation of Spanish language document

ADDENDUM NO. 2 TO THE COSTAYACO CRUDE OIL SALE AND PURCHASE AGREEMENT

Free English translation of Spanish language document

ADDENDUM NO. 2 TO THE COSTAYACO CRUDE OIL SALE AND PURCHASE AGREEMENT

In witness whereof the PARTIES sign this document in Bogotá D. C., on the 7^th of October of 2014, in two (2) identical counterparts destined to each one of the Parties.

The VENDOR: GRAN TIERRA ENERGY COLOMBIA LTD    

/s/ Adrian Coral Pantoja             /s/ Alejandra Escobar Herrera    

Adrian Coral Pantoja             Alejandra Escobar Herrera

Legal Representative                Legal Representative

The BUYER: GUNVOR COLOMBIA CI SAS

/s/ Jaime Alejandro Hoyos Juliao  

Jaime Alejandro Hoyos Juliao        

Legal Representative    

GUNVOR COLOMBIA CI SAS

Av. 82 No. 12-18, Oficina 401 Bogotá, Colombia

Phone +57-1 - 6227978 / 6364768

Fecha: 7 de octubre de 2014

OTROSÍ NO. 2 AL CONTRATO DE COMPRAVENTA DE CRUDO COSTAYACO

El presente otrosí (en adelante el “Otrosí”) al Contrato (como se define abajo) se celebra el 7 de octubre del 2014 por y entre GRAN TIERRA ENERGY COLOMBIA LTD, una sociedad de responsabilidad limitada organizada bajo las leyes del Estado de Utah, actuando a través de su sucursal colombiana debidamente registrada (en adelante el “VENDEDOR”), representada de forma conjunta por Adrian Coral Pantoja, identificado con Cédula de Ciudadanía No. 79.301.050 y Alejandra Escobar Herrera, identificada con Cédula de Ciudadanía No. 52.646.943, debidamente autorizados para celebrar este Otrosí de acuerdo con el Certificado de Existencia y Representación Legal emitido por la Cámara de Comercio que se adjunta al presente documento, y GUNVOR COLOMBIA CI SAS, una sociedad organizada bajo las leyes de la República de Colombia (en adelante el “COMPRADOR”), representada por Jaime Alejandro Hoyos Juliao, portador de la Cédula de Ciudadanía No. 80.082.474, debidamente autorizado para celebrar el presente Otrosí de acuerdo con el voto escrito de fecha de 30 de noviembre de 2012 por parte del único socio de Gunvor SAS, el cual se adjunta al presente documento. El VENDEDOR y el COMPRADOR serán denominados de forma individual la “PARTE”, y de forma conjunta las “PARTES”.

CONSIDERANDOS:

4. QUE el VENDEDOR y el COMPRADOR suscribieron el día tres (3) de diciembre de 2012 un contrato de compraventa de crudo (en adelante el “Contrato”) por medio del cual se acordó que el VENDEDOR podrá vender y entregar, y el COMPRADOR deberá comprar y cargar cuando el VENDEDOR nomine, hasta una cantidad máxima de 3,650 barriles de Crudo + 10% por día durante el plazo del Contrato.

OTROSÍ NO. 2 AL CONTRATO DE COMPRAVENTA DE CRUDO COSTAYACO

5. QUE según Otrosí No. 1 del 22 de noviembre de 2013,las PARTESacordaron ampliar el plazo del Contrato por el término de un (1) año adicional, y contado a partir del vencimiento del plazo inicialmente pactado.

6. QUE las PARTES están interesadas en modificar la Cláusula Quinta, entre otras para cambiar los marcadores para el cálculo del precio.

POR LO TANTO, en consideración de las premisas y de las declaraciones, garantías, pactos, acuerdos y compromisos mutuos, que se establecen en este Otrosí o a los que se hace referencia en el mismo, las PARTES convienen modificar el Contrato de la siguiente manera:

PRIMERA: Las PARTES acuerdan modificar la Cláusula Quinta del Contrato, la cual, será efectiva a partir del primero (1º) de octubre del 2014, y que quedará de la siguiente manera:

5.     PRECIO DEL CRUDO

Las PARTES convienen que el Precio del Crudo vendido y comprado se calculará en el Punto de Entrega de conformidad con la siguiente fórmula para cada barril neto entregado (para efectos de este Contrato, neto significará Volumen Estándar Neto o NSV).

El precio del Crudo se calculará así:    

P= (A + B) + X – T

El precio debe calcularse con base en el mes de cargue de los correspondientes camiones. El valor del precio para pago futuro será el BRENT FIRST MONTH según publicación / cotización de Crude Oil Marketwire de Platts (código ICLL001). El Marcador será declarado por EL COMPRADOR para cualquiera de las siguientes fechas, a más tardar a las 4:00 pm, hora de Bogotá, Colombia, del día 15 de cada mes. De conformidad con la legislación colombiana, si el día 15 de cada mes no es un día hábil, la declaración será hecha el siguiente día hábil antes de las 9 am, hora de Bogotá, Colombia. Para todos los fines relacionados con el presente Contrato, ni los sábados ni los domingos se considerarán como días hábiles. Las opciones del Marcador serán las siguientes:

• 1 a 15 del mes de cargue

• 15 al 30 (ó 31, dependiendo del mes) del mes de cargue

• Promedio del mes de cargue

OTROSÍ NO. 2 AL CONTRATO DE COMPRAVENTA DE CRUDO COSTAYACO

Donde:

P = Precio, expresado en Dólares de los Estados Unidos de América, que EL COMPRADOR pagará al EL VENDEDOR por cada barril neto de Crudo cargado en el Punto de Entrega.

A = Valor de Referencia: El precio para BRENT FIRST MONTH, según publicación / cotización Crude Oil Marketwire de Platts (código ICLL001), correspondiente a uno de los rangos de fechas declarados arriba.

B= VASCONIA DIFFERENTIAL TO FUTURES BRENT STRIP: se calculará como el promedio del diferencial Vasconia (código AAXCB00) según publicación / cotización de Platts Latin American Wire, correspondiente a los anteriores rangos de precios.

X= Es el diferencial ofrecido por EL COMPRADOR, expresado en Dólares de los Estados Unidos de América por Barril neto y equivalente a USD $ 1 por barril. Este monto incluye todos los costos incurridos por EL COMPRADOR desde el Punto de Entrega hasta el Punto Final de Entrega. Tales costos incluyen: administración, comercialización, tratamiento, cargue, descargue y disposición final tanto del Crudo como tal, como de los componentes adicionales de la mezcla recibida (agua, sedimentos e impurezas).

T= Es el valor del flete de carro tanque. Queda convenido en 0.63736 COP/km/gl bruto desde el Punto de Entrega hasta el Punto Final de Entrega.

EL COMPRADOR hará sus mejores esfuerzos respecto de la negociación del flete del carro tanque con contrapartes confiables para obtener los mejores costos posibles de fletes. Para dichos efectos, el COMPRADOR deberá entregar al VENDEDOR, cuando este último lo solicite, una descripción de las diferentes esfuerzos realizados encaminados a obtener dichos precios y los diferentes precios ofrecidos por la compañías de transporte, evidenciando que en efecto el COMPRADOR ha dado cumplimiento con su obligación contractual.

Cada elemento del precio y el precio final serán calculados a tres (3) decimales; las siguientes reglas aritméticas serán aplicadas:

OTROSÍ NO. 2 AL CONTRATO DE COMPRAVENTA DE CRUDO COSTAYACO

•Si la cuarta cifra decimal es cinco (5) o mayor que cinco (5), entonces el tercer lugar decimal se redondeará al siguiente dígito;

• Si la cuarta cifra decimal es cuatro (4) o menor que cuatro (4), entonces el tercer lugar decimal no cambiará.

SEGUNDA. Salvo lo acordado mediante el presente documento, las demás cláusulas del Contrato permanecerán vigentes en los mismo términos en que fueron inicialmente pactadas.

En señal de aceptación y constancia de lo anteriormente acordado las PARTES suscriben el presente documento en Bogotá D.C., el 7 de Octubre de 2014, en dos (2) ejemplares de igual valor y tenor con destino a cada una de las Partes.

EL VENDEDOR: GRAN TIERRA ENERGY COLOMBIA LTD    

/s/ Adrian Coral Pantoja             /s/ Alejandra Escobar Herrera    

Adrian Coral Pantoja             Alejandra Escobar Herrera

Representante Legal                Representante Legal

ELCOMPRADOR: GUNVOR COLOMBIA CI SAS

/s/ Jaime Alejandro Hoyos Juliao  

Jaime Alejandro Hoyos Juliao        

Representante Legal    

EX-10.10

Free English translation of Spanish language document

Exhibit 10.10

GUNVOR COLOMBIA CI SAS

Av. 82 No. 12-18, Oficina 401 Bogotá, Colombia

Phone +57-1 - 6227978 / 6364768

Date: the 7^th of October of 2014

ADDENDUM NO. 2 TO THE COSTAYACO CRUDE OIL SALE AND PURCHASE AGREEMENT

This Addendum (hereinafter the “Addendum”) to the Agreement (as defined below) is entered into on the 7^th of October of 2014 by and between PETROLIFERA PETROLEUM (COLOMBIA) LIMITED, a limited liability company organized under the laws of Cayman Islands, acting through its duly registered branch office (hereinafter the “VENDOR”), jointly represented by Adrian Coral Pantoja, identified with Colombian I. D. No. 79.301.050 and Alejandra Escobar Herrera, identified with Colombian I. D. No. 52.646.943, duly authorized to enter into this Addendum according to the Certificate of Existence and Incumbency issued by the Chamber of Commerce attached hereto, and GUNVOR COLOMBIA CI SAS, a company organized under the laws of the Republic of Colombia (hereinafter the “BUYER”), represented by Jaime Alejandro Hoyos Juliao, identified with Colombian I. D. No. 80.082.474, duly authorized to enter into this Addendum according to the written vote dated on the 30^th of November of 2012 of the sole partner of Gunvor SAS, attached hereto. The SELLER and the BUYER will be individually called the “PARTY”, and collectively “PARTIES”.

WITNESSETH:

1. WHEREAS the SELLER and the BUYER on the third day (3^rd) of December of 2012 entered into a crude oil sale and purchase agreement (hereinafter the “Agreement”) whereby it was agreed that the SELLER will be able to sell and deliver, and the BUYER must buy and charge whenever the SELLER nominates, up to a maximum quantity of 3,650 barrels of Crude Oil + 10% per day throughout the term of the Agreement.

Free English translation of Spanish language document

ADDENDUM NO. 2 TO THE COSTAYACO CRUDE OIL SALE AND PURCHASE AGREEMENT

2. WHEREAS according to Addendum No. 1 of the 22^nd of November of 2013,the PARTIESagreed to extend the term of the Contract for one (1) further year, as from the expiration of the term initially agreed.

3. WHEREAS, the PARTIES are interested in amending the Fifth Clause, among other things, to change the markers for the calculation of the price.

THEREFORE, in consideration to the premises and mutual representations, warranties, covenants, agreements and commitments established in this Addendum or referred to in it, the PARTIES agree to amend this Agreement as follows:

FIRST: The PARTIES agree to amend the Fifth Clause of the Contract, which shall be in force as from the first (1^st) day of October of 2014, and which shall read as follows:

5.     CRUDE OIL PRICE

THE PARTIES agree that the price of the Crude sold and purchased shall be calculated at the Delivery Point located in the Costayaco field in Putumayo and according to the following formula for each net barrel according to the following formula for each net barrel delivered (for the purposes of this Contract, net will mean Net Standard Volume or NSV).

The price of the Crude will be calculated such as:

P= (A + B) + X – T

The price should be calculated based on the month of cargo of the respective trucks. The amount of the price for future settlement will be BRENT FIRST MONTH as per publication / quote of Crude Oil Marketwire by Platts (code ICLL001). Marker shall be declared by THE BUYER for any of the following dates, by the latest at 4:00pm, Bogota, Colombia time, of the 15th day of each month. According to the Colombian legislation, should the 15th day of each month not be a working day, the declaration shall be made the following working day before 9 am, Bogotá, Colombia time. For all purposes related to this Agreement, Saturdays and Sundays shall not be deemed to be working days. The Marker options will be as follows:

• 1 to 15 of the month of cargo

• 15 to the 30 (31, depending on the month) of the month of cargo

• Average for the month of cargo

Where:

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ADDENDUM NO. 2 TO THE COSTAYACO CRUDE OIL SALE AND PURCHASE AGREEMENT

P = Price, stated in Dollars of the United States of America, which THE BUYER shall pay to THE VENDOR for each net barrel of crude oil loaded at the Delivery Point.

A = Value of reference: The BRENT FIRST MONTH price, as published / quoted of Crude Oil Marketwire by Platts (code ICLL001), corresponding to one of the above declared dates ranges.

B= VASCONIA DIFFERENTIAL TO FUTURES BRENT STRIP: Will be calculated as the average of the Vasconia (code AAXCB00) as quoted/published by Platts Latin American Wire, corresponding to the previous dates ranges.

X= Is the differential offered by THE BUYER, expressed in Dollars of the United States of America per net Barrel and equivalent to US$ 1 per barrel. This amount includes all of the costs incurred by THE BUYER from the Point of Receipt up to the Final Point of Delivery. Such costs include: administration, trading, treatment, cargo, unloading and final disposal both of the crude itself as well as of the additional components of the mixture received (water, sediments and impurities).

T= Is the trucking freight value. It is agreed on 0.63736 COP / km / gl gross on the Point of Receipt up to the Final Point of Delivery.

THE BUYER will make their best efforts regarding truck freight negotiation with reliable counterparties in order to try to obtain always the best trucking freight cost possible. For such purposes, the BUYER must give to the VENDOR, upon request, a description of the different efforts made aimed to obtain such prices and the different prices offered by the transportation companies, evidencing that indeed the BUYER has complied with its contractual obligation.

Each pricing element and the final price shall be calculated to three (3) decimal places; the following arithmetic rules shall be applied:

•if the fourth decimal place is five (5) or greater than five (5), then the third decimal place shall be rounded up to the next digit;

•if the fourth decimal place is four (4) or less than four (4), then the third decimal place will be unchanged.

SECOND. With the exception of the agreements of this document, all other clauses of the Agreement will remain in force in the same terms in which they were initially agreed.

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ADDENDUM NO. 2 TO THE COSTAYACO CRUDE OIL SALE AND PURCHASE AGREEMENT

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ADDENDUM NO. 2 TO THE COSTAYACO CRUDE OIL SALE AND PURCHASE AGREEMENT

In witness whereof the PARTIES sign this document in Bogotá D. C., on the 7^th of October of 2014, in two (2) identical counterparts destined to each one of the Parties.

The VENDOR: PETROLIFERA PETROLEUM (COLOMBIA) LIMITED

/s/ Adrian Coral Pantoja             /s/ Alejandra Escobar Herrera    

Adrian Coral Pantoja             Alejandra Escobar Herrera

Legal Representative                Legal Representative

The BUYER: GUNVOR COLOMBIA CI SAS

/s/ Jaime Alejandro Hoyos Juliao  

Jaime Alejandro Hoyos Juliao        

Legal Representative    

GUNVOR COLOMBIA CI SAS

Av. 82 No. 12-18, Oficina 401 Bogotá, Colombia

Phone +57-1 - 6227978 / 6364768

Fecha: 7 de octubre de 2014

OTROSÍ NO. 2 AL CONTRATO DE COMPRAVENTA DE CRUDO COSTAYACO

El presente otrosí (en adelante el “Otrosí”) al Contrato (como se define abajo) se celebra el 7 de octubre del 2014 por y entre PETROLIFERA PETROLEUM (COLOMBIA) LIMITED, una sociedad de responsabilidad limitada organizada bajo las leyes de las Islas Caimán, actuando a través de su sucursal colombiana debidamente registrada (en adelante el “VENDEDOR”), representada de forma conjunta por Adrian Coral Pantoja, identificado con Cédula de Ciudadanía No. 79.301.050 y Alejandra Escobar Herrera, identificada con Cédula de Ciudadanía No. 52.646.943, debidamente autorizados para celebrar este Otrosí de acuerdo con el Certificado de Existencia y Representación Legal emitido por la Cámara de Comercio que se adjunta al presente documento, y GUNVOR COLOMBIA CI SAS, una sociedad organizada bajo las leyes de la República de Colombia (en adelante el “COMPRADOR”), representada por Jaime Alejandro Hoyos Juliao, portador de la Cédula de Ciudadanía No. 80.082.474, debidamente autorizado para celebrar el presente Otrosí de acuerdo con el voto escrito de fecha de 30 de noviembre de 2012 por parte del único socio de Gunvor SAS, el cual se adjunta al presente documento. El VENDEDOR y el COMPRADOR serán denominados de forma individual la “PARTE”, y de forma conjunta las “PARTES”.

CONSIDERANDOS:

4. QUE el VENDEDOR y el COMPRADOR suscribieron el día tres (3) de diciembre de 2012 un contrato de compraventa de crudo (en adelante el “Contrato”) por medio del cual se acordó que el VENDEDOR podrá vender y entregar, y el COMPRADOR deberá comprar y cargar cuando el VENDEDOR nomine, hasta una cantidad máxima de 3,650 barriles de Crudo + 10% por día durante el plazo del Contrato.

5. QUE según Otrosí No. 1 del 22 de noviembre de 2013,las PARTESacordaron ampliar el plazo del Contrato por el término de un (1) año adicional, y contado a partir del vencimiento del plazo inicialmente pactado.

OTROSÍ NO. 2 AL CONTRATO DE COMPRAVENTA DE CRUDO COSTAYACO

6. QUE las PARTES están interesadas en modificar la Cláusula Quinta, entre otras para cambiar los marcadores para el cálculo del precio.

POR LO TANTO, en consideración de las premisas y de las declaraciones, garantías, pactos, acuerdos y compromisos mutuos, que se establecen en este Otrosí o a los que se hace referencia en el mismo, las PARTES convienen modificar el Contrato de la siguiente manera:

PRIMERA: Las PARTES acuerdan modificar la Cláusula Quinta del Contrato, la cual, será efectiva a partir del primero (1º) de octubre del 2014, y que quedará de la siguiente manera:

5.     PRECIO DEL CRUDO

Las PARTES convienen que el Precio del Crudo vendido y comprado se calculará en el Punto de Entrega de conformidad con la siguiente fórmula para cada barril neto entregado (para efectos de este Contrato, neto significará Volumen Estándar Neto o NSV).

El precio del Crudo se calculará así:    

P= (A + B) + X – T

El precio debe calcularse con base en el mes de cargue de los correspondientes camiones. El valor del precio para pago futuro será el BRENT FIRST MONTH según publicación / cotización de Crude Oil Marketwire de Platts (código ICLL001). El Marcador será declarado por EL COMPRADOR para cualquiera de las siguientes fechas, a más tardar a las 4:00 pm, hora de Bogotá, Colombia, del día 15 de cada mes. De conformidad con la legislación colombiana, si el día 15 de cada mes no es un día hábil, la declaración será hecha el siguiente día hábil antes de las 9 am, hora de Bogotá, Colombia. Para todos los fines relacionados con el presente Contrato, ni los sábados ni los domingos se considerarán como días hábiles. Las opciones del Marcador serán las siguientes:

• 1 a 15 del mes de cargue

• 15 al 30 (ó 31, dependiendo del mes) del mes de cargue

• Promedio del mes de cargue

Donde:

OTROSÍ NO. 2 AL CONTRATO DE COMPRAVENTA DE CRUDO COSTAYACO

P = Precio, expresado en Dólares de los Estados Unidos de América, que EL COMPRADOR pagará al EL VENDEDOR por cada barril neto de Crudo cargado en el Punto de Entrega.

A = Valor de Referencia: El precio para BRENT FIRST MONTH, según publicación / cotización Crude Oil Marketwire de Platts (código ICLL001), correspondiente a uno de los rangos de fechas declarados arriba.

B= VASCONIA DIFFERENTIAL TO FUTURES BRENT STRIP: se calculará como el promedio del diferencial Vasconia (código AAXCB00) según publicación / cotización de Platts Latin American Wire, correspondiente a los anteriores rangos de precios.

X= Es el diferencial ofrecido por EL COMPRADOR, expresado en Dólares de los Estados Unidos de América por Barril neto y equivalente a USD $ 1 por barril. Este monto incluye todos los costos incurridos por EL COMPRADOR desde el Punto de Entrega hasta el Punto Final de Entrega. Tales costos incluyen: administración, comercialización, tratamiento, cargue, descargue y disposición final tanto del Crudo como tal, como de los componentes adicionales de la mezcla recibida (agua, sedimentos e impurezas).

T= Es el valor del flete de carro tanque. Queda convenido en 0.63736 COP/km/gl bruto desde el Punto de Entrega hasta el Punto Final de Entrega.

EL COMPRADOR hará sus mejores esfuerzos respecto de la negociación del flete del carro tanque con contrapartes confiables para obtener los mejores costos posibles de fletes. Para dichos efectos, el COMPRADOR deberá entregar al VENDEDOR, cuando este último lo solicite, una descripción de las diferentes esfuerzos realizados encaminados a obtener dichos precios y los diferentes precios ofrecidos por la compañías de transporte, evidenciando que en efecto el COMPRADOR ha dado cumplimiento con su obligación contractual.

Cada elemento del precio y el precio final serán calculados a tres (3) decimales; las siguientes reglas aritméticas serán aplicadas:

•Si la cuarta cifra decimal es cinco (5) o mayor que cinco (5), entonces el tercer lugar decimal se redondeará al siguiente dígito;

• Si la cuarta cifra decimal es cuatro (4) o menor que cuatro (4), entonces el tercer lugar decimal no cambiará.

OTROSÍ NO. 2 AL CONTRATO DE COMPRAVENTA DE CRUDO COSTAYACO

SEGUNDA. Salvo lo acordado mediante el presente documento, las demás cláusulas del Contrato permanecerán vigentes en los mismo términos en que fueron inicialmente pactadas.

En señal de aceptación y constancia de lo anteriormente acordado las PARTES suscriben el presente documento en Bogotá D.C., el 7 de Octubre de 2014, en dos (2) ejemplares de igual valor y tenor con destino a cada una de las Partes.

EL VENDEDOR: PETROLIFERA PETROLEUM (COLOMBIA) LIMITED    

/s/ Adrian Coral Pantoja             /s/ Alejandra Escobar Herrera    

Adrian Coral Pantoja             Alejandra Escobar Herrera

Representante Legal                Representante Legal

ELCOMPRADOR: GUNVOR COLOMBIA CI SAS

/s/ Jaime Alejandro Hoyos Juliao  

Jaime Alejandro Hoyos Juliao        

Representante Legal    

EX-10.11

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Exhibit 10.11

ADDENDUM No. 1 TO CONTRACT No.: VSM-GPS-064-2013

COMMODITIES (CRUDE OIL) PURCHASE AGREEMENT

SPECIAL CONDITIONS

These are the Special Conditions of the Addendum to Contract No. VSM-GPS-064-2013, hereinafter “Addendum No. 1”.

THE PARTIES:

BUYER
Name	ECOPETROL S.A.
Founded by	Decentralized entity of the national order, created by Law 165 of 1948, NIT 899.999.068-1, organized as Mixed Economy Company based on the provisions of Article 2 of Law 1118 of 2006, attached to the Ministry of Mines and Energy, domiciled in Bogotá D.C., whose Bylaws are integrally contained in Public Deed No. 5314 of December 14, 2007 and its subsequent amendments, all granted before the Second Notary Public of the Notary Circuit of Bogotá DC., and registered with the Chamber of Commerce of Bogotá, D.C., hereinafter and for purposes of this Addendum No. 1 referred to as the “BUYER”, represented herein by LUIS FRANCISCO SANABRIA CHACÓN, bearer of citizenship card No. 79.538.375, acting in his capacity as National Manager of Refined and Crude Oil and duly authorized to enter into this Addendum No. 1, as evidenced by the attached Certificate of Incorporation and Legal Representation.
Address	Carrera 7 No. 37-69, Piso 7, Bogotá, D.C.
NIT	899.999.068-1
Represented by	Luis Francisco Sanabria Chacón
Identification	79.538.375
Issued in	Bogotá
Position	National Manager of Refined and Crude Oil
Telephone	(57)(1)234-4820

SELLER
Name	GRAN TIERRA ENERGY COLOMBIA LTD
Founded by	The Colombian branch of a foreign company organized according to the laws of the State of Utah, United States of America, duly established in Colombia according to Public Deed No. 5323 of October 25, 1983, granted before the Seventh Notary Public of the Notary Circuit of Bogotá, D.C., with NIT 860.516.431-7, hereinafter and for the effects of this Addendum No. 1, the “SELLER”, represented herein by ALEJANDRA ESCOBAR HERRERA, bearer of citizenship card No. 52.646.943 and IVÁN TOBÓN GARCÍA, bearer of citizenship card No. 79.751.294, acting in their capacity of Alternate Legal Representatives and duly authorized to enter into this Addendum No. 1, as evidenced by the Certificate of Incorporation and Legal Representation attached hereto and who state that neither they nor the company and the branch in Colombia that they represent, are subject to any disqualification or incompatibility provided for in the Constitution or in the Law that would prevent the execution of this document.

SPECIAL CONDITIONS OF THE CRUDE SUPPLY AGREEMENT

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Address	Calle 113 No. 7-80, Piso 17, Bogotá D.C.
NIT	860.516.431-7
Represented by	Alejandra Escobar Herrera and Iván Tobón García
Identification	52.646.943 and 79.751.294
Issued in	Bogotá
Position	Alternate Legal Representatives
Telephone	(57)(1)6585757

SPECIAL CONDITIONS

1.That on the first (1^st) day of December two thousand thirteen (2013), the partiesentered into Raw Material (Crude) Sales Agreement VSM-GPS-064-2013 (the “Sales Agreement”) for the purchase of crude produced under the Santana Shared-Risk Agreement, the Guayuyaco Association Agreement and the Chaza E&P.

2.That due to changes in the transportation, transportation tax and hydrocarbons handling fees (formerly known as the port operations fee), it is necessary to modify the price, for which purpose the parties enter into this Addendum No. 1 to the Sales Agreement.

3.That by virtue of the foregoing, the parties agree as follows:

I.PRICE (MODIFICATION OF NUMBER IV OF THE SPECIAL CONDITIONS OF THE SALES AGREEMENT)

A. For crude exported as South Blend Crude through the Port of Tumaco and received in the Tumaco Plant:

Crude Price =Marker - Hydrocarbons Handling Fee - Marketing Fee

Each of the above terms is described below:

Marker:Refers to the average price of exports of South Blend Crude in US$ / barrel received by the International Trade Management of the BUYER (including crudes traded for the affiliates) in the month of deliveries through the Port of Tumaco. This price will be reported by BUYER. If there have been no exports in the month of the deliveries, the Parties shall apply as provisional and final price the price defined in the Billing and Payment Clause. The reference quality of the South Blend is 29.3° API and 0.62% sulfur (S).

Tumaco Port Hydrocarbons Handling Fee: corresponds to a value of three point six four three one U.S. Dollars per barrel (US$ 3.6431 / bbl.).

Marketing Fee: corresponds to a value of two U.S. Dollars per barrel (US$ 2.00 / bbl.).

B. For crude oil received at the Dina Station and exported through the Port of Coveñas:

Crude Price =Marker - Transport (Delivery Site/Shipping Port) - Transport Tax -- Hydrocarbons Handling Fee - Marketing Fee

Each of the above terms is described below:

SPECIAL CONDITIONS OF THE CRUDE SUPPLY AGREEMENT

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Marker: Corresponds to the average export price of Vasconia Blend in US$/bbl. received by International Trade Management of BUYER (including crudes traded for the affiliates) in the month of the deliveries. This value will be provided by BUYER. If there have been no exports for the month of deliveries, the Parties shall apply as Marker the average daily quote for Vasconia crude reported by Platt’s and Argus for the month of the deliveries. The quality reference of Vasconia crude is 24.8° API and 0.95% sulfur (S).

Transport (Delivery Site/Shipping Port): This is determined as the sum of the fees established by the Ministry of Mines and Energy for the pipelines between Tenay and Coveñas. The pipeline transport fees shall be adjusted yearly for the “Phi” Factor as established by the Ministry of Mines and Energy.

Section	Approving Resolution	MME Base 100% Rate US$/bbl.
Tenay - Vasconia	OAM	2.6788
Vasconia - Coveñas ODC	ODC	1.7542
Total Transport		4.4330

The above fee will be modified once the system’s new fee is approved, based on the methodology for setting fees defined by the Ministry of Mines and Energy in Resolutions No. 72145, 72146 and 72216 of 2014 or those rules that may modify, add to or replace same. For the foregoing BUYER will communicate to SELLER, to the address or emails set forth in Clause V of this Addendum No. 1, the new fee at latest the last business day of the month in which the updated fee enters into force.

Transport Tax:This is determined in accordance with the provisions of Article 52 of the Petroleum Code of Colombia (or the regulation that replaces it) for the transport systems indicated in the previous section, as detailed below:

Section	MME Fee US$/bbl.	% Transport Tax	Transport Tax US$/bbl.
Tenay - Vasconia	2.6788	2%	0.0536
Vasconia - Coveñas ODC	1.7542	2%	0.0351
Total Tax	4.4330		0.0887

Hydrocarbons Handling Fee in the Port of Coveñas: Corresponds to a value of zero point seven six six eight United States Dollars per barrel (US$/bbl. 0.7668).

Marketing Fee: Corresponds to a value of two United States Dollars per barrel (US$/bbl. 2.00).

C. For crude exported through Ecuador:

Crude Price = Marker - Transport (Delivery Site/Shipping Port) - Transport Tax -Marketing Fee

Each of the above terms is described below:

Marker: Corresponds to the real weighted average price in US$/bbl. of the exports made by BUYER of crude exported in the month of deliveries or in those which include crude dispatched by BUYER through the corresponding port associated with the deliveries. If during the month of the deliveries

exports are not made through the corresponding port, the price of the following export made and which includes crude belonging to SELLER will be applied.

SPECIAL CONDITIONS OF THE CRUDE SUPPLY AGREEMENT

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Transport (Delivery Site/Shipment Port): This is determined as the sum of the following fees:

Section	Approving Resolution	MME Base 100% Rate USD/bbl.
Orito - San Miguel (OSO)	124572	2.4191
La Ye - Orito (OMO)	124560	0.5539
Total Transport		2.9730

• In the event that the contingency fee reported by CENIT TRANSPORTE Y LOGÍSTICA DE HIDROCARBUROS S.A.S. or whoever substitutes it, is applicable, this shall be used.

• Furthermore, the fee charged by PETROECUADOR and/or Oleoducto de Crudos Pesados (OCP) for the transport of crude between San Miguel and the corresponding port, will be transferred to SELLER.

• The above fee will be modified once the system’s new fee is approved, based on the methodology for setting fees defined by the Ministry of Mines and Energy in Resolutions No. 72145, 72146 and 72216 of 2014 or those rules that may modify, add to or replace same. For the foregoing BUYER will communicate to SELLER, to the address or emails set forth in Clause V of this Addendum No. 1, the new fee at latest the last business day of the month in which the updated fee enters into force

Transport Tax: This is determined in accordance with the provisions of Article 52 of the Petroleum Code of Colombia for the national transport systems indicated in the previous section. For the Ecuadorian section the respective tax, if applicable, will be taken into account from the delivery site to the shipment port.

Section	MME Fee US$/bbl.	% Transport Tax	Transport Tax US$/bbl.
Orito - San Miguel (OSO)	2.4191	2%	0.0484
La Ye - Orito (OMO)	0.5539	2%	0.0111
Total Tax	2.9730		0.0595

Marketing Fee: Corresponds to a value of two United States Dollars per barrel (US$/bbl. 2.00).

D. For crude delivered in Vasconia

Crude Price = Marker - US$ 7.5/bbl.

Each of the above terms is described below:

Marker: Corresponds to the average export price of Vasconia Blend in US$/bbl. received by International Trade Management of BUYER (including crude traded for the affiliates) in the month of the deliveries. This value will be provided by BUYER. If there have been no exports for the month of the deliveries, the Parties shall apply as Marker the average daily quote for Vasconia crude reported by Platt’s and Argus for the month of the deliveries. The quality reference of Vasconia crude is 24.8° API and 0.95% sulfur (S).

SPECIAL CONDITIONS OF THE CRUDE SUPPLY AGREEMENT

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PARAGRAPH 1: The values that may arise by effect of the updating or adjustment of the transportation fees, transportation taxes and hydrocarbons handling fees, provided the parties enter into the respective addendum shall be for the account of SELLER, subject to the provisions of Paragraphs 2 and 3 below.

PARAGRAPH 2: Any increase in the transportation fees, transportation taxes and hydrocarbons handling fees shall be subject to the following procedure:

1. BUYER will communicate to SELLER, to the address or emails set forth in Clause V of this Addendum No. 1, any fee increase at the latest the last business day of the month in which the fee increase enters into force. Such communication shall be accompanied by the support documentation that accredits the respective fee increase.

2. Within ten (10) calendar days following the date of reception of the communication referred to in Number 1. above, SELLER may, at its discretion, accept the fee increase or communicate its decision to terminate the Sales Agreement to BUYER, to the address or email set forth in Clause V of this Addendum No. 1. In the latter event, the termination of the Sales Agreement shall be effective on the tenth (10^th) calendar day counted as of receipt of the communication whereby SELLER communicates its decision, without being in any way obliged to indemnify BUYER

3. If SELLER does not accept the fee increase and communicates its decision to terminate the Sales Agreement, it shall assume the values arising due to the effects of the fee increase corresponding to the calendar month in which SELLER was notified in the terms set forth in Number 1. above, through the date on which the Sales Agreement terminates.

4. The values arising due to the effect of the fee increase shall be for BUYER’s account to the extent SELLER is not informed in the terms set forth in Number 1. above. In such case, BUYER irrevocably and in favor of SELLER, waives initiating any kind of action or in-court or out-of-court claim against it and expressly releases SELLER from any liability for such concepts, it being clear that any payment obligation is thus extinguished.

PARAGRAPH 3: Any reduction in the transportation fees, transportation taxes and hydrocarbons handling fees shall be deemed incorporated into the Sales Agreement as of the exact moment that the corresponding update enters into force. The foregoing is without prejudice to BUYER’s duty to communicate the new rate to SELLER, to the address or emails set forth in Clause V of this Addendum No. 1, at the latest on the last business day of the month in which the fee reduction enters into force.

II. TERM

The modifications set forth herein shall enter into force as of July first (1^st) two thousand fourteen (2014). Therefore any crude deliveries made as of July first (1^st) two thousand fourteen (2014) shall be deemed to be governed by the terms and conditions of this Addendum No. 1.

III. TAXES

Each of the parties to this Sales Agreement declares that it knows and accepts the taxes and/or withholdings corresponding to it according to current Law. The payment of all national, departmental and municipal taxes, levies, rates, contributions, quotas or the like, that arise or may arise in the future on occasion of this Sales Agreement including, but not limited to those incurred by reason of the perfection, formalization, execution and termination or liquidation of this Sales Agreement, or which may arise subsequent to the date of the signing of this Sales Agreement, shall be for the account of the respective taxpayer, who shall pay same according to the laws and regulations currently in force.

IV. EFFECTS OF THE AGREEMENTS

The parties hereby agree to lend the agreements contained herein the scope of a transaction, pursuant to the provisions set forth in the current regulations, thus maintaining the contractual, economic and financial equilibrium of the Sales Agreement.

V. NOTICES

SPECIAL CONDITIONS OF THE CRUDE SUPPLY AGREEMENT

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All notices, requests, notifications or communications that the parties have to send each other under the Sales Agreement shall be in writing and shall be deemed made as of the time that the respective document is filed or received at the address/email indicated below.

BUYER

ECOPETROL S.A.

National Manager of Refined and Crude Oil

Crude and Products Purchasing Department

María Carolina Kure Alba

Carrera 7 No. 37-69, Piso 5, Bogotá D.C.

Email: maria.kure@ecopetrol.com.co

Telephone: (+57) (1) 234 4820

Fax: (+57)(1) 234 4869

SELLER

GRAN TIERRA ENERGY COLOMBIA LTD.

Commercial Management

Carlos Felipe Marín / Juan Carlos Buitrago

Calle 113 No. 7-80, Piso 17, Bogotá, D.C.

Email: juanbuitrago@grantierra.com and cmarin@grantierra.com

Telephone (+57) (1) 6585757

Fax: (57)(1) 213 9327

VI. MISCELLANEOUS

6.1 Where not expressly modified by this Addendum No. 1., the terms of the Sales Agreement remain in full force and unaltered according to their original text.

6.2 If any contradiction should arise between this Addendum No. 1. and the Sales Agreement, this Addendum No. 1. shall prevail.

6.3 This Addendum No. 1 is entered into simultaneously in two (2) counterparts, each being deemed an original

In witness whereof, the Parties sign on the ninth (9^th) day of October two thousand and fourteen (2014).

SELLER	BUYER
/s/ Alejandra Escobar Herrera     ALEJANDRA ESCOBAR HERRERA Alternate Legal Representative            /s/ Iván Tobón García         IVÁN TOBÓN GARCÍA Alternate Legal Representative	/s/ Luis Francisco Sanabria Chacón      LUIS FRANCISCO SANABRIA CHACÓN National Manager of Refined and Crude Oil

Exhibit 1. Model Certification of Application LA/FT Prevention Standards for Companies required to adopt LA/FT prevention systems.

Exhibit 2. Certificate of Share Ownership of Associates, Shareholders, Partners with more than 5% stake in the share capital.

SPECIAL CONDITIONS OF THE CRUDE SUPPLY AGREEMENT

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EXHIBIT No. 1

MODEL CERTIFICATION OF APPLICATION OF THE LA/FT REGULATIONS FOR COMPANIES OBLIGED TO ADOPT THE LA/FT PREVENTION SYSTEMS

ONLY OBLIGATORY FOR COUNTERPARTIES WHO BY REASON OF LEGAL REGULATIONS ARE OBLIGED TO ADOPT LA/FT PREVENTION SYSTEMS

The purpose of this document is to certify before ECOPETROL S.A. that our entity has a SYSTEM FOR THE PREVENTION AND CONTROL OF LAUNDERING OF ASSETS AND FINDING OF TERRORISM, which fully complies with applicable Colombian regulations.

Therefore I, the undersigned, Alejandra Escobar Herrera, in my capacity of legal representative of Gran Tierra Energy Colombia (THE ENTITY) hereby CERTIFY that:

1.THE ENTITY complies with the Colombian rules and regulations related to the prevention and control of laundering of assets and financing of terrorism that are applicable to it.

Yes _X_         No ___

2.THE ENTITY has in place the appropriate policies, manuals and procedures for the prevention and control of laundering of assets and financing of terrorism that are in full compliance with the regulations in force that are applicable to it.

Yes _X_         No ___

3.Has THE ENTITY been involved in investigations for violation of the laws related to the Laundering of Assets and Financing of Terrorism?

Yes ___         No _X_

4.Has THE ENTITY or any of its employees or directors been sanctioned for violation of the laws related to the Laundering of Assets and Financing of Terrorism?

Yes ___         No _X_

Please fill out the following details of the complying officer or employee:

Name: David Hardy

Telephone: + 1 403 265 3221 Ext 2247

Email: davidhardy@grantierra.com

Address: 300 625 11^th Avenue S.W. Calgary, Alberta, Canada

We declare that we authorize ECOPETROL S.A., either directly or through the persons it appoints, to verify and confirm the information provided herein including the effective application of the SYSTEM FOR THE PREVENTION AND CONTROL OF LAUNDERING OF ASSETS AND FINDING OF TERRORISM within our entity.

Comments:______________________________________________________________________________________________________________________________________________________________________________________________

SPECIAL CONDITIONS OF THE CRUDE SUPPLY AGREEMENT

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Free English translation of Spanish language document

EXHIBIT No. 2

CERTIFICATE OF SHAREHOLDINGS OF ASSOCIATES, SHAREHOLDERS AND PARTNERS WITH A PARTICIPATION OF MORE THAN FIVE PERCENT (5%) IN THE CAPITAL STOCK

THIS CERTIFICATION IS ONLY REQUIRED IN THE CASE OF LEGAL ENTITIES WHICH, BY THEIR NATURE, THEIR SHAREHOLDERS OR ASSOCIATES DO NOT FIGURE IN THE CERTIFICATE OF THE CHAMBER OF COMMERCE

I hereby certify that the associates, shareholders or partners who have more than a FIVE PERCENT (5%) participation in the capital stock of the entity that I represent are the individuals or legal entities that appear in the list below:

NAME OF SHAREHOLDER, PARTNER OR ASSOCIATE IDENTIFICATION NUMBER OF SHARES, QUOTAS OR OUTSTANDING INTEREST PARTICIPATION IN THE CAPITAL STOCK (%)

I hereby certify that the real and controlling beneficiaries of the entity that I represent are the following individuals:

Name Identification

Name of the entity: Gran Tierra Energy Colombia Ltd

NIT: 860.516.431-7

Name of the legal representative: Alejandra Escobar Herrera

Identification Number_52.646.943

Signature of the legal representative

__________________________________________________________________________________

Not applicable. Gran Tierra Energy Colombia Ltd is a branch of a foreign entity.

SPECIAL CONDITIONS OF THE CRUDE SUPPLY AGREEMENT

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5

OTROSÍ No. 1 AL CONTRATO No.: VSM-GPS-064-2013

CONTRATO DE COMPRAVENTA DE MATERIA PRIMA (CRUDO)

CONDICIONES PARTICULARES

Las siguientes son las Condiciones del Otrosí al Contrato No. VSM-GPS-064-2013, en adelante el Otrosí No. 1.

LAS PARTES:

EL COMPRADOR
Nombre	ECOPETROL S.A.
Constituida por	Entidad descentralizada del orden nacional, creada por la Ley 165 de 1948, con NIT 899.999.068-1, organizada como Sociedad de Economía Mixta con base en lo establecido en el artículo 2° de la Ley 1118 de 2006, vinculada al Ministerio de Minas y Energía, con domicilio principal en Bogotá, D.C., cuyos Estatutos Sociales están contenidos de manera integral en la Escritura Pública No. 5314 del 14 de diciembre de 2007 y sus sucesivas modificaciones, todas ellas otorgadas en la Notaría Segunda del Círculo Notarial de Bogotá,D.C., e inscrita en la Cámara de Comercio de Bogotá, D.C., que en adelante y para los efectos de este Otrosí No. 1 se denominará EL COMPRADOR, representado en este acto por LUIS FRANCISCO SANABRIA CHACÓN, identificado con cédula de ciudadanía No. 79.538.375, quien actúa en su calidad de Gerente Nacional de Refinados y Crudos y se encuentra debidamente autorizado para celebrar este Otrosí No. 1, según consta en el Certificado de Existencia y Representación Legal adjunto.
Dirección	Carrera 7 No. 37-69 piso 5, Bogotá, D.C.
NIT	899.999.068-1
Representada por	Luis Francisco Sanabria Chacón
Identificación	79.538.375
Expedida en	Bogotá
Cargo	Gerente Nacional de Refinados y Crudos
Teléfono	(57)(1)234-4820

EL VENDEDOR
Nombre	GRAN TIERRA ENERGY COLOMBIA LTD
Constituida por	Sucursal colombiana de sociedad extranjera organizada de acuerdo con las leyes del Estado de Utah, Estados Unidos de América, debidamente establecida en Colombia según la Escritura Pública No. 5323 del 25 de octubre de 1983, otorgada en la Notaría Séptima del Círculo Notarial de Bogotá, D.C., e inscrita en la Cámara de Comercio de Bogotá, D.C., con NIT 860.516.431-7, que en adelante y para los efectos de este Otrosí No. 1 se denominará EL VENDEDOR, representado en este acto por ALEJANDRA ESCOBAR HERRERA, identificada con cédula de ciudadanía No. 52.646.943 e IVÁN TOBÓN GARCÍA, identificado con cédula de ciudadanía No. 79.751.294, quienes actúan en su calidad de Representantes Legales Suplentes y se encuentran debidamente autorizados para celebrar este Otrosí No. 1, según consta en el Certificado de Existencia y Representación Legal adjunto, y quienes manifiestan que ni ellos, ni la sociedad y la sucursal en Colombia que representan, se encuentran incursos en causal alguna de inhabilidad o incompatibilidad previstas en la Constitución Política o en la Ley que impida la celebración de este documento.
Dirección	Calle 113 No. 7-80, piso 17, Bogotá, D.C.
NIT	860.516.431-7
Representada por	Alejandra Escobar Herrera e Iván Tobón García
Identificación	52.646.943 y 79.751.294
Expedidas en	Bogotá
Cargo	Representantes Legales Suplentes
Teléfono	(57)(1)6585757

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CONSIDERACIONES PARTICULARES

4.    Que el primer (1) día del mes de diciembre del año dos mil trece (2013), las partes celebraron el Contrato de Compraventa de Materia Prima (Crudo) No. VSM-GPS-064-2013 (el “Contrato de Compraventa”) para la compra de crudo producido bajo el Contrato de Participación de Riesgo Santana, el Contrato de Asociación Guayuyaco y el E&P Chaza.

5.    Que debido al cambio en las tarifas de transporte, impuestos de transporte y manejo de hidrocarburos (antes, tarifa de operación portuaria), se requiere modificar el precio, para lo cual se celebra el Otrosí No. 1 al Contrato de Compraventa.

6.    Que en virtud de todo lo anterior, las partes acuerdan:

VII. PRECIO (MODIFICACIÓN DEL NUMERAL IV DE LAS CONDICIONES PARTICULARES DEL CONTRATO DE COMPRAVENTA)

A. Para crudo exportado como Mezcla South Blend por el puerto de Tumaco y recibido en la Planta de Tumaco:

Precio Crudo =Marcador - Tarifa de Manejo de Hidrocarburos - Tarifa de Comercialización

A continuación se definen cada uno de los términos anteriores:

Marcador: Corresponde al precio promedio de las exportaciones del Crudo South Blend en US$/Bl que haya realizado la Gerencia de Comercio Internacional de EL COMPRADOR (incluyendo crudos negociados para las filiales)en el mes de las entregas por el Puerto de Tumaco. Este precio será reportado por EL COMPRADOR. En caso que no se hayan realizado exportaciones para el mes de las entregas, corresponde a las partes aplicar como precio provisional y definitivo el precio definido en la Cláusula de Facturación y Pago. La calidad de referencia de la mezcla South Blend es: 29,3° API y 0.62% azufre (S).

Tarifa de Manejo de Hidrocarburos en el puerto de Tumaco: Corresponde a un valor de tres dólares con seis mil cuatrocientos treinta y un diezmilésimas de dólares americanos por barril (US$/Bl 3.6431).

Tarifa de Comercialización: Corresponde a un valor de dos dólares americanos por barril (US$/Bl 2,00).

CONDICIONES PARTICULARES CONTRATO PARA EL SUMINISTRO DE CRUDO

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B. Para crudo recibido en la Estación de Dina y exportado por el puerto de Coveñas:

Precio Crudo = Marcador - Transporte (Sitio Entrega/Puerto de Embarque) - Impuesto de Transporte - Tarifa de Manejo de Hidrocarburos - Tarifa de Comercialización

A continuación se definen cada uno de los términos anteriores:

Marcador: Corresponde al precio promedio de exportación de la Mezcla Vasconia en US$/Bl que haya realizado la Gerencia de Comercio Internacional de EL COMPRADOR (incluyendo crudos negociados para las filiales) para el mes de las entregas. Este valor será suministrado por EL COMPRADOR. En caso que no se hayan realizado exportaciones para el mes de las entregas, corresponde a las partes aplicar como Marcador, el precio promedio de las cotizaciones diarias del crudo Vasconia reportados por Platt´s y Argus para el mes de las entregas. La calidad de referencia del crudo Vasconia es 24,8°API y 0,95 % azufre (S).

Transporte(Sitio Entrega/Puerto de Embarque): Se determina como la sumatoria de las tarifas establecidas por el Ministerio de Minas y Energía para los oleoductos entre Tenay y Coveñas. Las tarifas de transporte de oleoductos se ajustarán cada año por el Factor “Phi” de acuerdo a lo que establezca el Ministerio de Minas y Energía.

Tramo	Resolución Aprobatoria	Base100% Tarifa MME US$/Bl
Tenay - Vasconia	OAM	2,6788
Vasconia - Coveñas ODC	ODC	1,7542
Total Transporte		4,4330

La tarifa anterior será modificada una vez se tenga la aprobación de la nueva tarifa del sistema, con base en la metodología de fijación de tarifas definida por el Ministerio de Minas y Energía en las Resoluciones No. 72145, 72146 y 72216 de 2014 o aquellas normas que las modifiquen, adicionen o sustituyan. Para lo anterior, EL COMPRADOR comunicará a EL VENDEDOR, en la dirección o correos electrónicos establecidos en la Cláusula V de este Otrosí No. 1, la nueva tarifa, a más tardar el último día hábil del mes en que la actualización tarifaria entre en vigencia.

Impuesto de Transporte: Se determina de acuerdo con lo establecido en el Artículo 52 del Código de Petróleos de Colombia (o a la norma que lo modifique) para los sistemas de transporte indicados en el punto anterior, según el siguiente detalle:

Tramo	Tarifa MME US$/Bl	% Impuesto de transporte	Impuesto de Transporte US$/Bl
Tenay - Vasconia	2,6788	2%	0,0536
Vasconia - Coveñas ODC	1,7542	2%	0,0351
Total Impuesto	4,4330		0,0887

Tarifa de Manejo de Hidrocarburos en el puerto de Coveñas: Corresponde a un valor de siete mil seiscientos sesenta y ocho diezmilésimas de dólar americano por barril (US$/Bl 0,7668).

Tarifa de Comercialización: Corresponde a un valor de dos dólares americanos por barril (US$/Bl 2,00).

CI. Para crudo exportado por Ecuador:

Precio Crudo = Marcador - Transporte (Sitio Entrega/Puerto de Embarque) - Impuesto de Transporte - Tarifa de Comercialización

A continuación se definen cada uno de los términos anteriores:

CONDICIONES PARTICULARES CONTRATO PARA EL SUMINISTRO DE CRUDO

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Marcador: Corresponde al precio promedio ponderado real en US$/Bl de las exportaciones realizadas por EL COMPRADOR de crudo exportado en el mes de las entregas o en las que se incluya crudo despachado por EL COMPRADOR por el puerto correspondiente asociadas a las entregas. Si durante el mes de las entregas no se realizan exportaciones por el puerto correspondiente, se aplicará el precio de la siguiente exportación que se realice y en el cual se incluya crudo propiedad de EL VENDEDOR.

Transporte (Sitio Entrega/Puerto de Embarque): Se determina como la sumatoria de las siguientes tarifas:

Tramo	Resolución del MME	Base100% Tarifa MME US$/Bl
Orito - San Miguel (OSO)	124572	2,4191
La Ye - Orito (OMO)	124560	0,5539
Total Transporte		2,9730

• En caso de que se dé la tarifa contingente reportada por CENIT TRANSPORTE Y LOGÍSTICA DE HIDROCARBUROS S.A.S o quien haga sus veces, esta será aplicada.

• Adicionalmente, se trasladará a EL VENDEDOR la tarifa cobrada por PETROECUADOR y/o Oleoducto de Crudos Pesados (OCP) por el transporte del crudo entre San Miguel y el puerto correspondiente.

• La tarifa anterior será modificada una vez se tenga la aprobación de la nueva tarifa del sistema, con base en la metodología de fijación de tarifas definida por el Ministerio de Minas y Energía en las Resoluciones No. 72145, 72146 y 72216 de 2014 o aquellas normas que las modifiquen, adicionen o sustituyan. Para lo anterior, EL COMPRADOR comunicará a EL VENDEDOR, en la dirección o correos electrónicos establecidos en la Cláusula V de este Otrosí No. 1, la nueva tarifa, a más tardar el último día hábil del mes en que la actualización tarifaria entre en vigencia.

Impuesto de Transporte: Se determina de acuerdo con lo establecido en el Artículo 52 del Código de Petróleos de Colombia para los sistemas de transporte nacionales indicados en el punto anterior. Para el tramo ecuatoriano se tendrá en cuenta el respectivo impuesto, si aplica, desde el sitio de entrega hasta el puerto de embarque.

Tramo	Tarifa MME US$/Bl	% Impuesto de transporte	Impuesto de Transporte US$/Bl
Orito - San Miguel (OSO)	2,4191	2%	0,0484
La Ye - Orito (OMO)	0,5539	2%	0,0111
Total Impuesto	2,9730	2%	0,0595

Tarifa de Comercialización: Corresponde a un valor de dos dólares americanos por barril (US$/Bl 2,00).

D. Para crudo entregado en Vasconia

Precio Crudo = Marcador - 7.5 US$/Bl

A continuación se definen cada uno de los términos anteriores:

Marcador: Corresponde al precio promedio de exportación de la Mezcla Vasconia en US$/Bl que haya realizado la Gerencia de Comercio Internacional de EL COMPRADOR (incluyendo crudos negociados para las filiales) para el mes de las entregas. Este valor será suministrado por EL COMPRADOR. En caso que no se hayan realizado exportaciones para el mes de las entregas, corresponde a las partes aplicar como Marcador, el precio promedio de las cotizaciones diarias del crudo Vasconia reportados por Platt´s y Argus para el mes de las entregas. La calidad de referencia del crudo Vasconia es 24,8°API y 0,95 % azufre (S).

CONDICIONES PARTICULARES CONTRATO PARA EL SUMINISTRO DE CRUDO

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PARÁGRAFO 1. Serán de cargo de EL VENDEDOR los valores que surjan por efecto de la actualización o ajuste que se presente en las tarifas de transporte, impuestos de transporte y manejo de hidrocarburos, siempre y cuando las partes celebren el correspondiente otrosí, sujeto a lo dispuesto en los Parágrafos 2. y 3. siguientes.

PARÁGRAFO 2. Cualquier incremento en las tarifas de transporte, impuestos de transporte y manejo de hidrocarburos, estará sujeto al siguiente procedimiento:

1. EL COMPRADOR deberá comunicar a EL VENDEDOR, en la dirección o correos electrónicos establecidos en la Cláusula V de este Otrosí No. 1, cualquier incremento tarifario, a más tardar el último día hábil del mes en que el incremento tarifario empezará a regir. La comunicación se acompañará de la documentación soporte que acredite el respectivo incremento tarifario.

2. Dentro de los diez (10) días calendario siguientes a la fecha de recibo de la comunicación señalada en el Numeral 1. anterior, EL VENDEDOR podrá a su arbitrio, aceptar el incremento tarifario o comunicar su decisión de dar por terminado el Contrato de Compraventa a EL COMPRADOR, en la dirección o correo electrónico establecido en la Cláusula V de este Otrosí No. 1. En este último caso, la terminación del Contrato de Compraventa será efectiva el décimo (10) día calendario contado a partir del recibo de la comunicación mediante la cual EL VENDEDOR comunica su decisión, sin que se vea obligado a indemnizar algún tipo de perjuicio a EL COMPRADOR.

3. En el evento que EL VENDEDOR no acepte el incremento tarifario ycomunique su decisión de dar por terminado el Contrato de Compraventa, deberá asumir los valores que surjan por efecto del incremento tarifario correspondientes al mes calendario en que EL VENDEDOR haya sido notificado en los términos establecidos en el Numeral 1. anterior, hasta el día en que termine el Contrato de Compraventa.

4. Los valores que surjan por efecto del incremento tarifario serán de cargo de EL COMPRADOR mientras EL VENDEDOR no sea comunicado en los términos establecidos en el Numeral 1. anterior. En este caso, EL COMPRADOR renuncia de manera irrevocable y en beneficio de EL VENDEDOR, a iniciar cualquier tipo de acción o reclamación extrajudicial o judicial en su contra y expresamente libera a EL VENDEDOR de cualquier responsabilidad por tales conceptos, quedando claro que cualquier obligación de pago queda extinguida.

PARÁGRAFO 3. Cualquier disminución en las tarifas de transporte, impuestos de transporte y manejo de hidrocarburos se entenderán incorporadas al Contrato de Compraventa desde el mismo instante en que entre en vigencia la correspondiente actualización. Lo anterior, sin perjuicio del deber que le asiste a EL COMPRADOR de comunicar a EL VENDEDOR, en la dirección o correos electrónicos establecidos en la Cláusula V de este Otrosí No. 1, la nueva tarifa, a más tardar el último día hábil del mes en que la disminución tarifaria entre en vigencia.

CONDICIONES PARTICULARES CONTRATO PARA EL SUMINISTRO DE CRUDO

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VIII.    CONDICIONES DE VIGENCIA

Las modificaciones aquí efectuadas tendrán vigencia a partir del primero (1) de julio de dos mil catorce (2014). Por consiguiente, se considerará que las entregas de crudo efectuadas a partir del primero (1) de julio de 2014 se regirán por los términos y condiciones del presente Otrosí No. 1.

IX.     IMPUESTOS

Cada una de las partes de esta compraventa declara que conoce y acepta los impuestos y/o retenciones que le corresponden de acuerdo con la Ley vigente. El pago de todos los impuestos nacionales, departamentales y municipales, gravámenes, tasas, contribuciones, cuotas o similares, que se ocasionen o llegaren a ocasionarse por este Contrato de Compraventa, incluyendo, pero sin limitarse a aquellos incurridos debido a la celebración, formalización, ejecución y terminación o liquidación del presente Contrato de Compraventa, o que surjan con posterioridad a la fecha de firma del presente Contrato de Compraventa, serán de cargo del sujeto pasivo del respectivo tributo, quien deberá pagarlos conforme a las leyes y reglamentos vigentes.

X.    EFECTOS DE LOS ACUERDOS

Las partes convienen en dar a los acuerdos contenidos en el presente documento el alcance de transacción, conforme a las previsiones establecidas en la normatividad vigente, manteniéndose con ello el equilibrio contractual, económico y financiero del Contrato de Compraventa.

XI.    NOTIFICACIONES

Todos los avisos, solicitudes, comunicaciones o notificaciones que las partes deban dirigirse en virtud del Contrato de Compraventa, se efectuarán por escrito y se considerarán realizadas desde el momento en que el documento correspondiente sea radicado o recibido en la dirección/correo que a continuación se indica.

EL COMPRADOR

ECOPETROL S.A.

Gerencia Nacional de Refinados y Crudos

Departamento de Compra de Crudos y Productos

Maria Carolina Kure Alba

Carrera 7 No. 37-69 piso 5, Bogotá, D.C.

Correo Electrónico:maria.kure@ecopetrol.com.co

Teléfono (+57)(1) 234 4820

Fax (+57)(1) 234 4869

EL VENDEDOR

PETROLÍFERA PETROLEUM (COLOMBIA) LIMITED

Gerencia Comercial

Carlos Felipe Marín / Juan Carlos Buitrago

Calle 113 No. 7-80, piso 17, Bogotá, D.C.

Correo Electrónico: juanbuitrago@grantierra.com y cmarin@grantierra.com

Teléfono (+57)(1) 6585757

Fax (+57)(1) 213 9327

XII. MISCELÁNEOS

6.1    En lo que no ha sido expresamente modificado con el presente Otrosí No. 1., los términos del Contrato de Compraventa continúan vigentes e inalterados conforme a su texto original.

6.2    Si se presenta una contradicción entre este Otrosí No. 1 y el Contrato de Compraventa, prevalecerá este Otrosí No. 1.

6.3    Este Otrosí No. 1 se firma simultáneamente en dos (2) ejemplares, constituyendo cada uno un original.

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En constancia se firma por las partes el día nueve (9) del mes de octubre del año dos mil catorce (2014).

EL VENDEDOR	EL COMPRADOR
/s/ Alejandra Escobar Herrera     ALEJANDRA ESCOBAR HERRERA Representante Legal Suplente            /s/ Iván Tobón García         IVÁN TOBÓN GARCÍA Representante Legal Suplente	/s/ Luis Francisco Sanabria Chacón      LUIS FRANCISCO SANABRIA CHACÓN Gerente Nacional de Refinados y Crudos

Anexo 1. Modelo de Certificación de Aplicación de Normas de Prevención del LA/FT para Empresas obligadas a adoptar sistemas de prevención del LA/FT.

Anexo 2. Certificado de Participación Accionaria Asociados, Accionistas, Socios que tienen más del 5% de participación en el capital social.

CONDICIONES PARTICULARES CONTRATO PARA EL SUMINISTRO DE CRUDO

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ANEXO No. 1

CONDICIONES PARTICULARES CONTRATO PARA EL SUMINISTRO DE CRUDO

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ANEXO No. 2

CONDICIONES PARTICULARES CONTRATO PARA EL SUMINISTRO DE CRUDO

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EX-10.12

Free English translation of Spanish language document

Exhibit 10.12

ADDENDUM No. 1 TO CONTRACT No.: VSM-GPS-065-2013

COMMODITIES (CRUDE OIL) PURCHASE AGREEMENT

SPECIAL CONDITIONS

These are the Special Conditions of the Addendum to Contract No. VSM-GPS-065-2013, hereinafter “Addendum No. 1”.

THE PARTIES:

BUYER
Name	ECOPETROL S.A.
Founded by	Decentralized entity of the national order, created by Law 165 of 1948, NIT 899.999.068-1, organized as Mixed Economy Company based on the provisions of Article 2 of Law 1118 of 2006, attached to the Ministry of Mines and Energy, domiciled in Bogotá D.C., whose Bylaws are integrally contained in Public Deed No. 5314 of December 14, 2007 and its subsequent amendments, all granted before the Second Notary Public of the Notary Circuit of Bogotá DC., and registered with the Chamber of Commerce of Bogotá, D.C., hereinafter and for purposes of this Addendum No. 1 referred to as the “BUYER”, represented herein by LUIS FRANCISCO SANABRIA CHACÓN, bearer of citizenship card No. 79.538.375, acting in his capacity as National Manager of Refined and Crude Oil and duly authorized to enter into this Addendum No. 1, as evidenced by the attached Certificate of Incorporation and Legal Representation.
Address	Carrera 7 No. 37-69, Piso 7, Bogotá, D.C.
NIT	899.999.068-1
Represented by	Luis Francisco Sanabria Chacón
Identification	79.538.375
Issued in	Bogotá
Position	National Manager of Refined and Crude Oil
Telephone	(57)(1)234-4820

SELLER
Name	PETROLÍFERA PETROLEUM (COLOMBIA) LIMITED
Founded by	The Colombian branch of a foreign company organized according to the laws of the Cayman Islands, duly established in Colombia according to Public Deed No. 1682 of March 2, 2007, granted before the Sixth Notary Public of the Notary Circuit of Bogotá, D.C., with NIT 900.139.306-1, hereinafter and for the effects of this Addendum No. 1, the “SELLER”, represented herein by ALEJANDRA ESCOBAR HERRERA, bearer of citizenship card No. 52.646.943 and IVÁN TOBÓN GARCÍA, bearer of citizenship card No. 79.751.294, acting in their capacity of Alternate Legal Representatives and duly authorized to enter into this Addendum No. 1, as evidenced by the Certificate of Incorporation and Legal Representation attached hereto and who state that neither they nor the company and the branch in Colombia that they represent, are subject to any disqualification or incompatibility provided for in the Constitution or in the Law that would prevent the execution of this document.

SPECIAL CONDITIONS OF THE CRUDE SUPPLY AGREEMENT

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Free English translation of Spanish language document

Address	Calle 113 No. 7-80, Piso 17, Bogotá D.C.
NIT	900.139.306-1
Represented by	Alejandra Escobar Herrera and Iván Tobón García
Identification	52.646.943 and 79.751.294
Issued in	Bogotá
Position	Alternate Legal Representatives
Telephone	(57) (1) 6585757

SPECIAL CONDITIONS

1.That on the first (1^st) day of December two thousand thirteen (2013), the partiesentered into Raw Material (Crude) Sales Agreement VSM-GPS-065-2013 (the “Sales Agreement”) for the purchase of crude produced under the Guayuyaco Association Agreement and the Chaza E&P.

2.That due to changes in the transportation, transportation tax and hydrocarbons handling fees (formerly known as the port operations fee), it is necessary to modify the price, for which purpose the parties enter into this Addendum No. 1 to the Sales Agreement.

3.That by virtue of the foregoing, the parties agree as follows:

I. PRICE (MODIFICATION OF NUMBER IV OF THE SPECIAL CONDITIONS OF THE SALES AGREEMENT)

A. For crude exported as South Blend Crude through the Port of Tumaco and received in the Tumaco Plant:

Crude Price =Marker - Hydrocarbons Handling Fee - Marketing Fee

Each of the above terms is described below:

Marker:Refers to the average price of exports of South Blend Crude in US$ / barrel received by the International Trade Management of the BUYER (including crudes traded for the affiliates) in the month of deliveries through the Port of Tumaco. This price will be reported by BUYER. If there have been no exports in the month of the deliveries, the Parties shall apply as provisional and final price the price defined in the Billing and Payment Clause. The reference quality of the South Blend is 29.3° API and 0.62% sulfur (S).

Tumaco Port Hydrocarbons Handling Fee: corresponds to a value of three point six four three one U.S. Dollars per barrel (US$ 3.6431 / bbl.).

Marketing Fee: corresponds to a value of two U.S. Dollars per barrel (US$ 2.00 / bbl.).

B. For crude oil received at the Dina Station and exported through the Port of Coveñas:

Crude Price =Marker - Transport (Delivery Site/Shipping Port) - Transport Tax -- Hydrocarbons Handling Fee - Marketing Fee

Each of the above terms is described below:

SPECIAL CONDITIONS OF THE CRUDE SUPPLY AGREEMENT

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Free English translation of Spanish language document

Marker: Corresponds to the average export price of Vasconia Blend in US$/bbl. received by International Trade Management of BUYER (including crudes traded for the affiliates) in the month of the deliveries. This value will be provided by BUYER. If there have been no exports for the month of deliveries, the Parties shall apply as Marker the average daily quote for Vasconia crude reported by Platt’s and Argus for the month of the deliveries. The quality reference of Vasconia crude is 24.8° API and 0.95% sulfur (S).

Transport (Delivery Site/Shipping Port): This is determined as the sum of the fees established by the Ministry of Mines and Energy for the pipelines between Tenay and Coveñas. The pipeline transport fees shall be adjusted yearly for the “Phi” Factor as established by the Ministry of Mines and Energy.

Section	Approving Resolution	MME Base 100% Rate US$/bbl.
Tenay - Vasconia	OAM	2.6788
Vasconia - Coveñas ODC	ODC	1.7542
Total Transport		4.4330

The above fee will be modified once the system’s new fee is approved, based on the methodology for setting fees defined by the Ministry of Mines and Energy in Resolutions No. 72145, 72146 and 72216 of 2014 or those rules that may modify, add to or replace same. For the foregoing BUYER will communicate to SELLER, to the address or emails set forth in Clause V of this Addendum No. 1, the new fee at latest the last business day of the month in which the updated fee enters into force.

Transport Tax:This is determined in accordance with the provisions of Article 52 of the Petroleum Code of Colombia (or the regulation that replaces it) for the transport systems indicated in the previous section, as detailed below:

Section	MME Fee US$/bbl.	% Transport Tax	Transport Tax US$/bbl.
Tenay - Vasconia	2.6788	2%	0.0536
Vasconia - Coveñas ODC	1.7542	2%	0.0351
Total Tax	4.4330		0.0887

Hydrocarbons Handling Fee in the Port of Coveñas: Corresponds to a value of zero point seven six six eight United States Dollars per barrel (US$/bbl. 0.7668).

Marketing Fee: Corresponds to a value of two United States Dollars per barrel (US$/bbl. 2.00).

C. For crude exported through Ecuador:

Crude Price = Marker - Transport (Delivery Site/Shipping Port) - Transport Tax -Marketing Fee

Each of the above terms is described below:

Marker: Corresponds to the real weighted average price in US$/bbl. of the exports made by BUYER of crude exported in the month of deliveries or in those which include crude dispatched by BUYER

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through the corresponding port associated with the deliveries. If during the month of the deliveries exports are not made through the corresponding port, the price of the following export made and which includes crude belonging to SELLER will be applied.

Transport (Delivery Site/Shipment Port): This is determined as the sum of the following fees:

Section	Approving Resolution	MME Base 100% Rate USD/bbl.
Orito - San Miguel (OSO)	124572	2.4191
La Ye - Orito (OMO)	124560	0.5539
Total Transport		2.9730

• In the event that the contingency fee reported by CENIT TRANSPORTE Y LOGÍSTICA DE HIDROCARBUROS S.A.S. or whoever substitutes it, is applicable, this shall be used.

• Furthermore, the fee charged by PETROECUADOR and/or Oleoducto de Crudos Pesados (OCP) for the transport of crude between San Miguel and the corresponding port, will be transferred to SELLER.

• The above fee will be modified once the system’s new fee is approved, based on the methodology for setting fees defined by the Ministry of Mines and Energy in Resolutions No. 72145, 72146 and 72216 of 2014 or those rules that may modify, add to or replace same. For the foregoing BUYER will communicate to SELLER, to the address or emails set forth in Clause V of this Addendum No. 1, the new fee at latest the last business day of the month in which the updated fee enters into force

Transport Tax: This is determined in accordance with the provisions of Article 52 of the Petroleum Code of Colombia for the national transport systems indicated in the previous section. For the Ecuadorian section the respective tax, if applicable, will be taken into account from the delivery site to the shipment port.

Section	MME Fee US$/bbl.	% Transport Tax	Transport Tax US$/bbl.
Orito - San Miguel (OSO)	2.4191	2%	0.0484
La Ye - Orito (OMO)	0.5539	2%	0.0111
Total Tax	2.9730		0.0595

Marketing Fee: Corresponds to a value of two United States Dollars per barrel (US$/bbl. 2.00).

D. For crude delivered in Vasconia

Crude Price = Marker - US$ 7.5/bbl.

Each of the above terms is described below:

Marker: Corresponds to the average export price of Vasconia Blend in US$/bbl. received by International Trade Management of BUYER (including crude traded for the affiliates) in the month of the deliveries. This value will be provided by BUYER. If there have been no exports for the month of the deliveries, the Parties shall apply as Marker the average daily quote for Vasconia crude reported by Platt’s and Argus for the month of the deliveries. The quality reference of Vasconia crude is 24.8°

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API and 0.95% sulfur (S).

PARAGRAPH 1: The values that may arise by effect of the updating or adjustment of the transportation fees, transportation taxes and hydrocarbons handling fees, provided the parties enter into the respective addendum shall be for the account of SELLER, subject to the provisions of Paragraphs 2 and 3 below.

PARAGRAPH 2: Any increase in the transportation fees, transportation taxes and hydrocarbons handling fees shall be subject to the following procedure:

1. BUYER will communicate to SELLER, to the address or emails set forth in Clause V of this Addendum No. 1, any fee increase at the latest the last business day of the month in which the fee increase enters into force. Such communication shall be accompanied by the support documentation that accredits the respective fee increase.

2. Within ten (10) calendar days following the date of reception of the communication referred to in Number 1. above, SELLER may, at its discretion, accept the fee increase or communicate its decision to terminate the Sales Agreement to BUYER, to the address or email set forth in Clause V of this Addendum No. 1. In the latter event, the termination of the Sales Agreement shall be effective on the tenth (10^th) calendar day counted as of receipt of the communication whereby SELLER communicates its decision, without being in any way obliged to indemnify BUYER.

3. If SELLER does not accept the fee increase and communicates its decision to terminate the Sales Agreement, it shall assume the values arising due to the effects of the fee increase corresponding to the calendar month in which SELLER was notified in the terms set forth in Number 1. above, through the date on which the Sales Agreement terminates.

4. The values arising due to the effect of the fee increase shall be for BUYER’s account to the extent SELLER is not informed in the terms set forth in Number 1. above. In such case, BUYER irrevocably and in favor of SELLER, waives initiating any kind of action or in-court or out-of-court claim against it and expressly releases SELLER from any liability for such concepts, it being clear that any payment obligation is thus extinguished.

PARAGRAPH 3: Any reduction in the transportation fees, transportation taxes and hydrocarbons handling fees shall be deemed incorporated into the Sales Agreement as of the exact moment that the corresponding update enters into force. The foregoing is without prejudice to BUYER’s duty to communicate the new rate to SELLER, to the address or emails set forth in Clause V of this Addendum No. 1, at the latest on the last business day of the month in which the fee reduction enters into force.

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II. TERM

The modifications set forth herein shall enter into force as of July first (1^st) two thousand fourteen (2014). Therefore any crude deliveries made as of July first (1^st) two thousand fourteen (2014) shall be deemed to be governed by the terms and conditions of this Addendum No. 1.

III. TAXES

Each of the parties to this Sales Agreement declares that it knows and accepts the taxes and/or withholdings corresponding to it according to current Law. The payment of all national, departmental and municipal taxes, levies, rates, contributions, quotas or the like, that arise or may arise in the future on occasion of this Sales Agreement including, but not limited to those incurred by reason of the perfection, formalization, execution and termination or liquidation of this Sales Agreement, or which may arise subsequent to the date of the signing of this Sales Agreement, shall be for the account of the respective taxpayer, who shall pay same according to the laws and regulations currently in force.

IV. EFFECTS OF THE AGREEMENTS

The parties hereby agree to lend the agreements contained herein the scope of a transaction, pursuant to the provisions set forth in the current regulations, thus maintaining the contractual, economic and financial equilibrium of the Sales Agreement.

V. NOTICES

All notices, requests, notifications or communications that the parties have to send each other under the Sales Agreement shall be in writing and shall be deemed made as of the time that the respective document is filed or received at the address/email indicated below.

BUYER

ECOPETROL S.A.

National Manager of Refined and Crude Oil

Crude and Products Purchasing Department

María Carolina Kure Alba

Carrera 7 No. 37-69, Piso 5, Bogotá D.C.

Email: maria.kure@ecopetrol.com.co

Telephone: (+57) (1) 234 4820

Fax: (+57)(1) 234 4869

SELLER

PETROLÍFERA PETROLEUM (COLOMBIA) LIMITED

Commercial Management

Carlos Felipe Marín / Juan Carlos Buitrago

Calle 113 No. 7-80, Piso 17, Bogotá, D.C.

Email: juanbuitrago@grantierra.com and cmarin@grantierra.com

Telephone (+57) (1) 6585757

Fax: (57)(1) 213 9327

VI. MISCELLANEOUS

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6.1 Where not expressly modified by this Addendum No. 1., the terms of the Sales Agreement remain in full force and unaltered according to their original text.

6.2 If any contradiction should arise between this Addendum No. 1. and the Sales Agreement, this Addendum No. 1. shall prevail.

6.3 This Addendum No. 1 is entered into simultaneously in two (2) counterparts, each being deemed an original

In witness whereof, the Parties sign on the ninth (9^th) day of October two thousand and fourteen (2014).

SELLER	BUYER
/s/ Alejandra Escobar Herrera     ALEJANDRA ESCOBAR HERRERA Alternate Legal Representative            /s/ Iván Tobón García         IVÁN TOBÓN GARCÍA Alternate Legal Representative	/s/ Luis Francisco Sanabria Chacón      LUIS FRANCISCO SANABRIA CHACÓN National Manager of Refined and Crude Oil

Exhibit 1. Model Certification of Application LA/FT Prevention Standards for Companies required to adopt LA/FT prevention systems.

Exhibit 2. Certificate of Share Ownership of Associates, Shareholders, Partners with more than 5% stake in the share capital.

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EXHIBIT No. 1

MODEL CERTIFICATION OF APPLICATION OF THE LA/FT REGULATIONS FOR COMPANIES OBLIGED TO ADOPT THE LA/FT PREVENTION SYSTEMS

ONLY OBLIGATORY FOR COUNTERPARTIES WHO BY REASON OF LEGAL REGULATIONS ARE OBLIGED TO ADOPT LA/FT PREVENTION SYSTEMS

The purpose of this document is to certify before ECOPETROL S.A. that our entity has a SYSTEM FOR THE PREVENTION AND CONTROL OF LAUNDERING OF ASSETS AND FINDING OF TERRORISM, which fully complies with applicable Colombian regulations.

Therefore I, the undersigned, Alejandra Escobar Herrera, in my capacity of legal representative of Gran Tierra Energy Colombia / Petrolifera Petroleum (Colombia) Limited (THE ENTITY) hereby CERTIFY that:

1.THE ENTITY complies with the Colombian rules and regulations related to the prevention and control of laundering of assets and financing of terrorism that are applicable to it.

Yes _X_         No ___

2.THE ENTITY has in place the appropriate policies, manuals and procedures for the prevention and control of laundering of assets and financing of terrorism that are in full compliance with the regulations in force that are applicable to it.

Yes _X_         No ___

3.Has THE ENTITY been involved in investigations for violation of the laws related to the Laundering of Assets and Financing of Terrorism?

Yes ___         No _X_

4.Has THE ENTITY or any of its employees or directors been sanctioned for violation of the laws related to the Laundering of Assets and Financing of Terrorism?

Yes ___         No _X_

Please fill out the following details of the complying officer or employee:

Name: David Hardy

Telephone: + 1 403 265 3221 Ext 2247

Email: davidhardy@grantierra.com

Address: 300 625 11^th Avenue S.W. Calgary, Alberta, Canada

We declare that we authorize ECOPETROL S.A., either directly or through the persons it appoints, to verify and confirm the information provided herein including the effective application of the SYSTEM FOR THE PREVENTION AND CONTROL OF LAUNDERING OF ASSETS AND FINDING OF TERRORISM within our entity.

Comments:______________________________________________________________________________________________________________________________________________________________________________________________

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EXHIBIT No. 2

CERTIFICATE OF SHAREHOLDINGS OF ASSOCIATES, SHAREHOLDERS AND PARTNERS WITH A PARTICIPATION OF MORE THAN FIVE PERCENT (5%) IN THE CAPITAL STOCK

THIS CERTIFICATION IS ONLY REQUIRED IN THE CASE OF LEGAL ENTITIES WHICH, BY THEIR NATURE, THEIR SHAREHOLDERS OR ASSOCIATES DO NOT FIGURE IN THE CERTIFICATE OF THE CHAMBER OF COMMERCE

I hereby certify that the associates, shareholders or partners who have more than a FIVE PERCENT (5%) participation in the capital stock of the entity that I represent are the individuals or legal entities that appear in the list below:

NAME OF SHAREHOLDER, PARTNER OR ASSOCIATE IDENTIFICATION NUMBER OF SHARES, QUOTAS OR OUTSTANDING INTEREST PARTICIPATION IN THE CAPITAL STOCK (%)

I hereby certify that the real and controlling beneficiaries of the entity that I represent are the following individuals:

Name Identification

Name of the entity: Petrolifera Petroleum (Colombia) Limited

NIT: 900.139.306-1

Name of the legal representative: Alejandra Escobar Herrera

Identification Number_52.646.943

Signature of the legal representative

__________________________________________________________________________________

Not applicable. Petrolifera Petroleum (Colombia) Limited is a branch of a foreign entity.

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OTROSÍ No. 1 AL CONTRATO No.: VSM-GPS-065-2013

CONTRATO DE COMPRAVENTA DE MATERIA PRIMA (CRUDO)

CONDICIONES PARTICULARES

Las siguientes son las Condiciones del Otrosí al Contrato No. VSM-GPS-065-2013, en adelante el Otrosí No. 1.

LAS PARTES:

EL COMPRADOR
Nombre	ECOPETROL S.A.
Constituida por	Entidad descentralizada del orden nacional, creada por la Ley 165 de 1948, con NIT 899.999.068-1, organizada como Sociedad de Economía Mixta con base en lo establecido en el artículo 2° de la Ley 1118 de 2006, vinculada al Ministerio de Minas y Energía, con domicilio principal en Bogotá, D.C., cuyos Estatutos Sociales están contenidos de manera integral en la Escritura Pública No. 5314 del 14 de diciembre de 2007 y sus sucesivas modificaciones, todas ellas otorgadas en la Notaría Segunda del Círculo Notarial de Bogotá,D.C., e inscrita en la Cámara de Comercio de Bogotá, D.C., que en adelante y para los efectos de este Otrosí No. 1 se denominará EL COMPRADOR, representado en este acto por LUIS FRANCISCO SANABRIA CHACÓN, identificado con cédula de ciudadanía No. 79.538.375, quien actúa en su calidad de Gerente Nacional de Refinados y Crudos y se encuentra debidamente autorizado para celebrar este Otrosí No. 1, según consta en el Certificado de Existencia y Representación Legal adjunto.
Dirección	Carrera 7 No. 37-69 piso 5, Bogotá, D.C.
NIT	899.999.068-1
Representada por	Luis Francisco Sanabria Chacón
Identificación	79.538.375
Expedida en	Bogotá
Cargo	Gerente Nacional de Refinados y Crudos
Teléfono	(57)(1)234-4820

EL VENDEDOR
Nombre	PETROLÍFERA PETROLEUM (COLOMBIA) LIMITED
Constituida por	Sucursal colombiana de sociedad extranjera organizada de acuerdo con las leyes de las Islas Caimán, debidamente establecida en Colombia según la Escritura Pública No. 1682 del 2 de marzo de 2007, otorgada en la Notaría Sexta del Círculo Notarial de Bogotá, D.C., e inscrita en la Cámara de Comercio de Bogotá, D.C., con NIT 900.139.306-1, que en adelante y para los efectos de este Otrosí No. 1 se denominará EL VENDEDOR, representado en este acto por ALEJANDRA ESCOBAR HERRERA, identificada con cédula de ciudadanía No. 52.646.943 e IVÁN TOBÓN GARCÍA, identificado con cédula de ciudadanía No. 79.751.294, quienes actúan en su calidad de Representantes Legales Suplentes y se encuentran debidamente autorizados para celebrar este Otrosí No. 1, según consta en el Certificado de Existencia y Representación Legal adjunto, y quienes manifiestan que ni ellos, ni la sociedad y la sucursal en Colombia que representan, se encuentran incursos en causal alguna de inhabilidad o incompatibilidad previstas en la Constitución Política o en la Ley que impida la celebración de este documento.
Dirección	Calle 113 No. 7-80, piso 17, Bogotá, D.C.
NIT	900.139.306-1
Representada por	Alejandra Escobar Herrera e Iván Tobón García
Identificación	52.646.943 y 79.751.294
Expedidas en	Bogotá
Cargo	Representantes Legales Suplentes
Teléfono	(57) (1) 6585757

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CONSIDERACIONES PARTICULARES

4.    Que el primer (1) día del mes de diciembre del año dos mil trece (2013), las partes celebraron el Contrato de Compraventa de Materia Prima (Crudo) No. VSM-GPS-065-2013 (el “Contrato de Compraventa”) para la compra de crudo producido bajo el Contrato de Asociación Guayuyaco y el E&P Chaza.

5.    Que debido al cambio en las tarifas de transporte, impuestos de transporte y manejo de hidrocarburos (antes, tarifa de operación portuaria), se requiere modificar el precio, para lo cual se celebra el Otrosí No. 1 al Contrato de Compraventa.

6.    Que en virtud de todo lo anterior, las partes acuerdan:

VII. PRECIO (MODIFICACIÓN DEL NUMERAL IV DE LAS CONDICIONES PARTICULARES DEL CONTRATO DE COMPRAVENTA)

A. Para crudo exportado como Mezcla South Blend por el puerto de Tumaco y recibido en la Planta de Tumaco:

Precio Crudo =Marcador - Tarifa de Manejo de Hidrocarburos - Tarifa de Comercialización

A continuación se definen cada uno de los términos anteriores:

Marcador: Corresponde al precio promedio de las exportaciones del Crudo South Blend en US$/Bl que haya realizado la Gerencia de Comercio Internacional de EL COMPRADOR (incluyendo crudos negociados para las filiales)en el mes de las entregas por el Puerto de Tumaco. Este precio será reportado por EL COMPRADOR. En caso que no se hayan realizado exportaciones para el mes de las entregas, corresponde a las partes aplicar como precio provisional y definitivo el precio definido en la Cláusula de Facturación y Pago. La calidad de referencia de la mezcla South Blend es: 29,3° API y 0.62% azufre (S).

Tarifa de Manejo de Hidrocarburos en el puerto de Tumaco: Corresponde a un valor de tres dólares con seis mil cuatrocientos treinta y un diezmilésimas de dólares americanos por barril (US$/Bl 3.6431).

Tarifa de Comercialización: Corresponde a un valor de dos dólares americanos por barril (US$/Bl 2,00).

B. Para crudo recibido en la Estación de Dina y exportado por el puerto de Coveñas:

Precio Crudo =Marcador - Transporte (Sitio Entrega/Puerto de Embarque) - Impuesto de Transporte - Tarifa de Manejo de Hidrocarburos - Tarifa de Comercialización

A continuación se definen cada uno de los términos anteriores:

Marcador: Corresponde al precio promedio de exportación de la Mezcla Vasconia en US$/Bl que haya realizado la Gerencia de Comercio Internacional de EL COMPRADOR (incluyendo crudos negociados para las filiales) para el mes de las entregas. Este valor será suministrado por EL COMPRADOR. En caso que no se hayan realizado exportaciones para el mes de las entregas, corresponde a las partes aplicar como Marcador, el precio promedio de las cotizaciones diarias del crudo Vasconia reportados por Platt´s y Argus para el mes de las entregas. La calidad de referencia del crudo Vasconia es 24,8°API y 0,95 % azufre (S).

Transporte(Sitio Entrega/Puerto de Embarque): Se determina como la sumatoria de las tarifas establecidas por el Ministerio de Minas y Energía para los oleoductos entre Tenay y Coveñas. Las tarifas de transporte de oleoductos se ajustarán cada año por el Factor “Phi” de acuerdo a lo que establezca el Ministerio de Minas y Energía.

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Tramo	Resolución Aprobatoria	Base100% Tarifa MME US$/Bl
Tenay - Vasconia	OAM	2,6788
Vasconia - Coveñas ODC	ODC	1,7542
Total Transporte		4,4330

La tarifa anterior será modificada una vez se tenga la aprobación de la nueva tarifa del sistema, con base en la metodología de fijación de tarifas definida por el Ministerio de Minas y Energía en las Resoluciones No. 72145, 72146 y 72216 de 2014 o aquellas normas que las modifiquen, adicionen o sustituyan. Para lo anterior, EL COMPRADOR comunicará a EL VENDEDOR, en la dirección o correos electrónicos establecidos en la Cláusula V de este Otrosí No. 1, la nueva tarifa, a más tardar el último día hábil del mes en que la actualización tarifaria entre en vigencia.

Impuesto de Transporte: Se determina de acuerdo con lo establecido en el Artículo 52 del Código de Petróleos de Colombia (o a la norma que lo modifique) para los sistemas de transporte indicados en el punto anterior, según el siguiente detalle:

Tramo	Tarifa MME US$/Bl	% Impuesto de transporte	Impuesto de Transporte US$/Bl
Tenay - Vasconia	2,6788	2%	0,0536
Vasconia - Coveñas ODC	1,7542	2%	0,0351
Total Impuesto	4,4330		0,0887

Tarifa de Manejo de Hidrocarburos en el puerto de Coveñas: Corresponde a un valor de siete mil seiscientos sesenta y ocho diezmilésimas de dólar americano por barril (US$/Bl 0,7668).

Tarifa de Comercialización: Corresponde a un valor de dos dólares americanos por barril (US$/Bl 2,00).

CI.     Para crudo exportado por Ecuador:

Precio Crudo = Marcador - Transporte (Sitio Entrega/Puerto de Embarque) - Impuesto de Transporte - Tarifa de Comercialización

A continuación se definen cada uno de los términos anteriores:

Marcador: Corresponde al precio promedio ponderado real en US$/Bl de las exportaciones realizadas por EL COMPRADOR de crudo exportado en el mes de las entregas o en las que se incluya crudo despachado por EL COMPRADOR por el puerto correspondiente asociadas a las entregas. Si durante el mes de las entregas no se realizan exportaciones por el puerto correspondiente, se aplicará el precio de la siguiente exportación que se realice y en el cual se incluya crudo propiedad de EL VENDEDOR.

Transporte (Sitio Entrega/Puerto de Embarque): Se determina como la sumatoria de las siguientes tarifas:

Tramo	Resolución del MME	Base100% Tarifa MME US$/Bl
Orito - San Miguel (OSO)	124572	2,4191
La Ye - Orito (OMO)	124560	0,5539
Total Transporte		2,9730

CONDICIONES PARTICULARES CONTRATO PARA EL SUMINISTRO DE CRUDO

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• En caso de que se dé la tarifa contingente reportada por CENIT TRANSPORTE Y LOGÍSTICA DE HIDROCARBUROS S.A.S o quien haga sus veces, esta será aplicada.

• Adicionalmente, se trasladará a EL VENDEDOR la tarifa cobrada por PETROECUADOR y/o Oleoducto de Crudos Pesados (OCP) por el transporte del crudo entre San Miguel y el puerto correspondiente.

• La tarifa anterior será modificada una vez se tenga la aprobación de la nueva tarifa del sistema, con base en la metodología de fijación de tarifas definida por el Ministerio de Minas y Energía en las Resoluciones No. 72145, 72146 y 72216 de 2014 o aquellas normas que las modifiquen, adicionen o sustituyan. Para lo anterior, EL COMPRADOR comunicará a EL VENDEDOR, en la dirección o correos electrónicos establecidos en la Cláusula V de este Otrosí No. 1, la nueva tarifa, a más tardar el último día hábil del mes en que la actualización tarifaria entre en vigencia.

Impuesto de Transporte: Se determina de acuerdo con lo establecido en el Artículo 52 del Código de Petróleos de Colombia para los sistemas de transporte nacionales indicados en el punto anterior. Para el tramo ecuatoriano se tendrá en cuenta el respectivo impuesto, si aplica, desde el sitio de entrega hasta el puerto de embarque.

Tramo	Tarifa MME US$/Bl	% Impuesto de transporte	Impuesto de Transporte US$/Bl
Orito - San Miguel (OSO)	2,4191	2%	0,0484
La Ye - Orito (OMO)	0,5539	2%	0,0111
Total Impuesto	2,9730	2%	0,0595

Tarifa de Comercialización: Corresponde a un valor de dos dólares americanos por barril (US$/Bl 2,00).

D. Para crudo entregado en Vasconia

Precio Crudo = Marcador - 7.5 US$/Bl

A continuación se definen cada uno de los términos anteriores:

Marcador: Corresponde al precio promedio de exportación de la Mezcla Vasconia en US$/Bl que haya realizado la Gerencia de Comercio Internacional de EL COMPRADOR (incluyendo crudos negociados para las filiales) para el mes de las entregas. Este valor será suministrado por EL COMPRADOR. En caso que no se hayan realizado exportaciones para el mes de las entregas, corresponde a las partes aplicar como Marcador, el precio promedio de las cotizaciones diarias del crudo Vasconia reportados por Platt´s y Argus para el mes de las entregas. La calidad de referencia del crudo Vasconia es 24,8°API y 0,95 % azufre (S).

PARÁGRAFO 1. Serán de cargo de EL VENDEDOR los valores que surjan por efecto de la actualización o ajuste que se presente en las tarifas de transporte, impuestos de transporte y manejo de hidrocarburos, siempre y cuando las partes celebren el correspondiente otrosí, sujeto a lo dispuesto en los Parágrafos 2. y 3. siguientes.

PARÁGRAFO 2. Cualquier incremento en las tarifas de transporte, impuestos de transporte y manejo de hidrocarburos, estará sujeto al siguiente procedimiento:

1. EL COMPRADOR deberá comunicar a EL VENDEDOR, en la dirección o correos electrónicos establecidos en la Cláusula V de este Otrosí No. 1, cualquier incremento tarifario, a más tardar el último día hábil del mes en que el incremento tarifario empezará a regir. La comunicación se acompañará de la documentación soporte que acredite el respectivo incremento tarifario.

2. Dentro de los diez (10) días calendario siguientes a la fecha de recibo de la comunicación señalada en el Numeral 1. anterior, EL VENDEDOR podrá a su arbitrio, aceptar el incremento tarifario o comunicar su decisión de dar por terminado el Contrato de Compraventa a EL COMPRADOR, en la dirección o correo electrónico establecido en la Cláusula V de este Otrosí No. 1. En este último caso, la terminación del Contrato de Compraventa será efectiva

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el décimo (10) día calendario contado a partir del recibo de la comunicación mediante la cual EL VENDEDOR comunica su decisión, sin que se vea obligado a indemnizar algún tipo de perjuicio a EL COMPRADOR.

3. En el evento que EL VENDEDOR no acepte el incremento tarifario ycomunique su decisión de dar por terminado el Contrato de Compraventa, deberá asumir los valores que surjan por efecto del incremento tarifario correspondientes al mes calendario en que EL VENDEDOR haya sido notificado en los términos establecidos en el Numeral 1. anterior, hasta el día en que termine el Contrato de Compraventa.

4. Los valores que surjan por efecto del incremento tarifario serán de cargo de EL COMPRADOR mientras EL VENDEDOR no sea comunicado en los términos establecidos en el Numeral 1. anterior. En este caso, EL COMPRADOR renuncia de manera irrevocable y en beneficio de EL VENDEDOR, a iniciar cualquier tipo de acción o reclamación extrajudicial o judicial en su contra y expresamente libera a EL VENDEDOR de cualquier responsabilidad por tales conceptos, quedando claro que cualquier obligación de pago queda extinguida.

PARÁGRAFO 3. Cualquier disminución en las tarifas de transporte, impuestos de transporte y manejo de hidrocarburos se entenderán incorporadas al Contrato de Compraventa desde el mismo instante en que entre en vigencia la correspondiente actualización. Lo anterior, sin perjuicio del deber que le asiste a EL COMPRADOR de comunicar a EL VENDEDOR, en la dirección o correos electrónicos establecidos en la Cláusula V de este Otrosí No. 1, la nueva tarifa, a más tardar el último día hábil del mes en que la disminución tarifaria entre en vigencia.

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VIII. CONDICIONES DE VIGENCIA

Las modificaciones aquí efectuadas tendrán vigencia a partir del primero (1) de julio de dos mil catorce (2014). Por consiguiente, se considerará que las entregas de crudo efectuadas a partir del primero (1) de julio de 2014 se regirán por los términos y condiciones del presente Otrosí No. 1.

IX. IMPUESTOS

Cada una de las partes de esta compraventa declara que conoce y acepta los impuestos y/o retenciones que le corresponden de acuerdo con la Ley vigente. El pago de todos los impuestos nacionales, departamentales y municipales, gravámenes, tasas, contribuciones, cuotas o similares, que se ocasionen o llegaren a ocasionarse por este Contrato de Compraventa, incluyendo, pero sin limitarse a aquellos incurridos debido a la celebración, formalización, ejecución y terminación o liquidación del presente Contrato de Compraventa, o que surjan con posterioridad a la fecha de firma del presente Contrato de Compraventa, serán de cargo del sujeto pasivo del respectivo tributo, quien deberá pagarlos conforme a las leyes y reglamentos vigentes.

X. EFECTOS DE LOS ACUERDOS

Las partes convienen en dar a los acuerdos contenidos en el presente documento el alcance de transacción, conforme a las previsiones establecidas en la normatividad vigente, manteniéndose con ello el equilibrio contractual, económico y financiero del Contrato de Compraventa.

XI. NOTIFICACIONES

Todos los avisos, solicitudes, comunicaciones o notificaciones que las partes deban dirigirse en virtud del Contrato de Compraventa, se efectuarán por escrito y se considerarán realizadas desde el momento en que el documento correspondiente sea radicado o recibido en la dirección/correo que a continuación se indica.

EL COMPRADOR

ECOPETROL S.A.

Gerencia Nacional de Refinados y Crudos

Departamento de Compra de Crudos y Productos

Maria Carolina Kure Alba

Carrera 7 No. 37-69 piso 5, Bogotá, D.C.

Correo Electrónico:maria.kure@ecopetrol.com.co

Teléfono (+57)(1) 234 4820

Fax (+57)(1) 234 4869

EL VENDEDOR

PETROLÍFERA PETROLEUM (COLOMBIA) LIMITED

Gerencia Comercial

Carlos Felipe Marín / Juan Carlos Buitrago

Calle 113 No. 7-80, piso 17, Bogotá, D.C.

Correo Electrónico: juanbuitrago@grantierra.com y cmarin@grantierra.com

Teléfono (+57)(1) 6585757

Fax (+57)(1) 213 9327

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XII. MISCELÁNEOS

6.1    En lo que no ha sido expresamente modificado con el presente Otrosí No. 1., los términos del Contrato de Compraventa continúan vigentes e inalterados conforme a su texto original.

6.2    Si se presenta una contradicción entre este Otrosí No. 1 y el Contrato de Compraventa, prevalecerá este Otrosí No. 1.

6.3    Este Otrosí No. 1 se firma simultáneamente en dos (2) ejemplares, constituyendo cada uno un original.

En constancia se firma por las partes el día nueve (9) del mes de octubre del año dos mil catorce (2014).

EL VENDEDOR	EL COMPRADOR
/s/ Alejandra Escobar Herrera     ALEJANDRA ESCOBAR HERRERA Representante Legal Suplente            /s/ Iván Tobón García         IVÁN TOBÓN GARCÍA Representante Legal Suplente	/s/ Luis Francisco Sanabria Chacón      LUIS FRANCISCO SANABRIA CHACÓN Gerente Nacional de Refinados y Crudos

Anexo 1. Modelo de Certificación de Aplicación de Normas de Prevención del LA/FT para Empresas obligadas a adoptar sistemas de prevención del LA/FT.

Anexo 2. Certificado de Participación Accionaria Asociados, Accionistas, Socios que tienen más del 5% de participación en el capital social.

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ANEXO No. 1

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ANEXO No. 2

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EX-31.1

EXHIBIT 31.1

CERTIFICATION

I, Dana Coffield, certify that:

1. I have reviewed this Form 10-Q of Gran Tierra Energy Inc.;

2. Based on my knowledge, this report does not contain any untrue statement of a material fact or omit to state a material fact necessary to make the statements made, in light of the circumstances under which such statements were made, not misleading with respect to the period covered by this report;

3. Based on my knowledge, the financial statements, and other financial information included in this report, fairly present in all material respects the financial condition, results of operations and cash flows of the registrant as of, and for, the periods presented in this report;

4. The registrant’s other certifying officer and I are responsible for establishing and maintaining disclosure controls and procedures (as defined in Exchange Act Rules 13a-15(e) and 15d-15(e)) and internal control over financial reporting (as defined in Exchange Act Rules 13a-15(f) and 15d-15(f)) for the registrant and have:

(a) Designed such disclosure controls and procedures, or caused such disclosure controls and procedures to be designed under our supervision, to ensure that material information relating to the registrant, including its consolidated subsidiaries, is made known to us by others within those entities, particularly during the period in which this report is being prepared;

(b) Designed such internal control over financial reporting, or caused such internal control over financial reporting to be designed under our supervision, to provide reasonable assurance regarding the reliability of financial reporting and the preparation of financial statements for external purposes in accordance with generally accepted accounting principles;

(c) Evaluated the effectiveness of the registrant’s disclosure controls and procedures and presented in this report our conclusions about the effectiveness of the disclosure controls and procedures, as of the end of the period covered by this report based on such evaluation; and

(d) Disclosed in this report any change in the registrant’s internal control over financial reporting that occurred during the registrant’s most recent fiscal quarter (the registrant’s fourth fiscal quarter in the case of an annual report) that has materially affected, or is reasonably likely to materially affect, the registrant’s internal control over financial reporting; and

5. The registrant’s other certifying officer and I have disclosed, based on our most recent evaluation of internal control over financial reporting, to the registrant’s auditors and the audit committee of the registrant’s board of directors (or persons performing the equivalent functions):

(a) All significant deficiencies and material weaknesses in the design or operation of internal control over financial reporting which are reasonably likely to adversely affect the registrant’s ability to record, process, summarize and report financial information; and

(b) Any fraud, whether or not material, that involves management or other employees who have a significant role in the registrant’s internal control over financial reporting.

Date: November 5, 2014	/s/ Dana Coffield
	Dana Coffield
	Chief Executive Officer and President
	(Principal Executive Officer)

EX-31.2

EXHIBIT 31.2

CERTIFICATION

I, James Rozon, certify that:

1. I have reviewed this Form 10-Q of Gran Tierra Energy Inc.;

2. Based on my knowledge, this report does not contain any untrue statement of a material fact or omit to state a material fact necessary to make the statements made, in light of the circumstances under which such statements were made, not misleading with respect to the period covered by this report;

3. Based on my knowledge, the financial statements, and other financial information included in this report, fairly present in all material respects the financial condition, results of operations and cash flows of the registrant as of, and for, the periods presented in this report;

4. The registrant’s other certifying officer and I are responsible for establishing and maintaining disclosure controls and procedures (as defined in Exchange Act Rules 13a-15(e) and 15d-15(e)) and internal control over financial reporting (as defined in Exchange Act Rules 13a-15(f) and 15d-15(f)) for the registrant and have:

(a) Designed such disclosure controls and procedures, or caused such disclosure controls and procedures to be designed under our supervision, to ensure that material information relating to the registrant, including its consolidated subsidiaries, is made known to us by others within those entities, particularly during the period in which this report is being prepared;

(b) Designed such internal control over financial reporting, or caused such internal control over financial reporting to be designed under our supervision, to provide reasonable assurance regarding the reliability of financial reporting and the preparation of financial statements for external purposes in accordance with generally accepted accounting principles;

(c) Evaluated the effectiveness of the registrant’s disclosure controls and procedures and presented in this report our conclusions about the effectiveness of the disclosure controls and procedures, as of the end of the period covered by this report based on such evaluation; and

(d) Disclosed in this report any change in the registrant’s internal control over financial reporting that occurred during the registrant’s most recent fiscal quarter (the registrant’s fourth fiscal quarter in the case of an annual report) that has materially affected, or is reasonably likely to materially affect, the registrant’s internal control over financial reporting; and

5. The registrant’s other certifying officer and I have disclosed, based on our most recent evaluation of internal control over financial reporting, to the registrant’s auditors and the audit committee of the registrant’s board of directors (or persons performing the equivalent functions):

(a) All significant deficiencies and material weaknesses in the design or operation of internal control over financial reporting which are reasonably likely to adversely affect the registrant’s ability to record, process, summarize and report financial information; and

(b) Any fraud, whether or not material, that involves management or other employees who have a significant role in the registrant’s internal control over financial reporting.

Date: November 5, 2014	/s/ James Rozon
	James Rozon
	Chief Financial Officer
	(Principal Financial Officer)

EX-32.1

EXHIBIT 32.1

CERTIFICATIONS PURSUANT TO

18 U.S.C. §1350,

AS ADOPTED PURSUANT TO

SECTION 906 OF THE SARBANES-OXLEY ACT OF 2002

In connection with the Quarterly Report on Form 10-Q of Gran Tierra Energy Inc. (the “Company”) for the quarter ended September 30, 2014, as filed with the Securities and Exchange Commission on the date hereof (the “Report”), Dana Coffield, Chief Executive Officer of the Company, and James Rozon, Chief Financial Officer of the Company, each hereby certifies, to the best of his knowledge, pursuant to 18 U.S.C. §1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002, that:

(1) The Report, to which this Certification is attached as Exhibit 32.1, fully complies with the requirements of Section 13(a) or 15(d) of the Securities Exchange Act of 1934; and

(2) The information contained in the Report fairly presents, in all material respects, the financial condition and results of operations of the Company.

Dated: November 5, 2014

/s/ Dana Coffield	/s/ James Rozon
Dana Coffield	James Rozon
Chief Executive Officer and President	Chief Financial Officer

This certification accompanies the Form 10-Q to which it relates, is not deemed filed with the SEC and is not to be incorporated by reference into any filing of the Company under the Securities Act of 1933, as amended, or the Securities Exchange Act of 1934 (whether made before or after the date of the Form 10-Q), irrespective of any general incorporation language contained in such filing.

XML

Taxes - Permanent Differences Reconciliation (Details) (USD $) In Thousands, unless otherwise specified	Sep. 30, 2014	Dec. 31, 2013
Income Tax Disclosure [Abstract]
Tax benefit of operating loss carryforwards	$ 36,367	$ 47,154
Tax basis in excess of book basis	40,257	59,168
Foreign tax credits and other accruals	19,917	34,894
Tax benefit of capital loss carryforwards	29,114	4,769
Deferred tax assets before valuation allowance	125,655	145,985
Valuation allowance	(122,860)	(142,322)
Deferred tax assets, net	2,795	3,663
Deferred tax assets - current	1,099	2,256
Deferred tax assets - long-term	1,696	1,407
Deferred tax liabilities - current	(1,461)	(1,193)
Deferred tax liabilities - long-term	(168,495)	(177,082)
Deferred tax liabilities, net	(169,956)	(178,275)
Net Deferred Tax Liabilities	$ (167,161)	$ (174,612)

XML

Financial Instruments, Fair Value Measurements and Credit Risk - Narrative (Details) (USD $) In Thousands, unless otherwise specified	9 Months Ended			0 Months Ended
	Sep. 30, 2014	Sep. 30, 2014 Colombia [Member] Sales Revenue, Segment [Member] Geographic Concentration Risk [Member]	Sep. 30, 2013 Colombia [Member] Sales Revenue, Segment [Member] Geographic Concentration Risk [Member]	Oct. 08, 2012 Block-Brazil [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Participating interest percentage oil and gas property, remaining percentage				30.00%
Concentration risk, percentage		95.00%	96.00%
Foreign exchange losses, Colombian peso to U.S. dollar	$ 80

XML

Share Capital - RSU and Stock Option Activity (Details) (USD $)	9 Months Ended
	Sep. 30, 2014
Number of Outstanding Options
Balance (in shares)	15,668,458
Granted (in shares)	2,407,730
Exercised (in shares)	(3,029,853)
Forfeited (in shares)	(197,676)
Expired (in shares)	(720,724)
Balance (in shares)	14,127,935
Weighted Average Exercise Price $/Option
Weighted Average Exercise Price $/Option, beginning balance (in dollars per share)	$ 5.41
Weighted Average Exercise Price $/Option, Granted (in dollars per share)	$ 7.06
Weighted Average Exercise Price $/Options, Exercised (in dollars per share)	$ (3.68)
Weighted Average Exercise Price $/Options, Forfeited (in dollars per share)	$ (6.59)
Weighted Average Exercise Price $/Options, Expired (in dollars per share)	$ (7.12)
Weighted Average Exercise Price $/Option, ending balance (in dollars per share)	$ 5.96
RSUs [Member]
Number of Outstanding Share Units
Balance (in shares)	922,045
Granted (in shares)	903,205
Exercised (in shares)	(415,538)
Forfeited (in shares)	(50,980)
Expired (in shares)	0
Balance (in shares)	1,358,732

XML

Discontinued Operations - Revenue and Loss from Discontinued Operations (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013
Discontinued Operations and Disposal Groups [Abstract]
Revenue and other income	$ 0	$ 18,316	$ 31,985	$ 55,335
Loss from operations of discontinued operations before income taxes	0	(4,163)	(6,252)	(6,253)
Income tax expense	0	(2,993)	(1,458)	(4,791)
Loss from operations of discontinued operations	0	(7,156)	(7,710)	(11,044)
Loss on sale before income taxes	0	0	(18,235)	0
Income tax expense	0	0	(1,045)	0
Loss on sale	0	0	(19,280)	0
Loss from discontinued operations, net of income taxes	$ 0	$ (7,156)	$ (26,990)	$ (11,044)

XML

Contingencies (Details) (USD $)			3 Months Ended		9 Months Ended
	Sep. 30, 2014	Dec. 31, 2013	Mar. 31, 2014 Pending Litigation Escopetrol [Member]	Mar. 31, 2013 Pending Litigation Escopetrol [Member] bbl	Sep. 30, 2014 Pending Litigation Moqueta Discovery [Member] bbl	Sep. 30, 2014 Pending Litigation Royalty, Transportation and Related Costs [Member]
Loss Contingencies [Line Items]
Loss in period in barrels of oil				44,025
Contingent liability (Note 9)			$ 4,400,000		$ 59,700,000	$ 38,900,000
Threshold by which additional royalty due (barrels)					5,000,000
Total cumulative production of oil field (barrels)					3,700,000
Promissory notes provided as collateral for letters of credit	$ 73,600,000	$ 52,500,000

XML

Asset Retirement Obligation (Details) (USD $)	9 Months Ended	12 Months Ended
	Sep. 30, 2014	Dec. 31, 2013
Asset Retirement Obligation, Roll Forward Analysis [Roll Forward]
Balance, beginning of period	$ 21,973,000	$ 18,292,000
Settlements	(211,000)	(2,068,000)
Liability incurred	10,262,000	2,623,000
Liabilities associated with the Argentina business unit sold	(10,170,000)	0
Foreign exchange	(14,000)	(25,000)
Accretion	1,022,000	1,279,000
Revisions in estimated liability	4,056,000	1,872,000
Balance, end of period	26,918,000	21,973,000
Asset retirement obligation - current	7,353,000	518,000
Asset retirement obligation - long-term	19,565,000	21,455,000
Balance, end of period	26,918,000	21,973,000
Fair value of legally restricted assets	$ 2,400,000	$ 1,900,000

XML

Discontinued Operations

9 Months Ended

Sep. 30, 2014

Discontinued Operations and Disposal Groups [Abstract]

Discontinued Operations

Discontinued Operations

On June 25, 2014, the Company, through several of its indirect subsidiaries (the “Selling Subsidiaries”), sold its Argentina business unit to Madalena Energy Inc. ("Madalena") for aggregate consideration of $69.3 million, comprising $55.4 million in cash and $13.9 million in Madalena shares.

The sale was made pursuant to agreements entered into by the Selling Subsidiaries (the “Agreements”); specifically, pursuant to the Agreements: (1) Madalena agreed to acquire from Gran Tierra Argentina Holdings ULC, an Alberta corporation (“GTE ULC”), and PCESA Petroleros Canadienses de Ecuador S.A., an Ecuador corporation (“PCESA”), both indirect subsidiaries of the Company, all of the outstanding shares of the Company’s indirect subsidiaries Gran Tierra Energy Argentina S.R.L. (“GTE Argentina”) and P.E.T.J.A. S.A, and agreed to acquire certain debt owed by GTE Argentina, for (a) approximately $44.8 million in cash, plus certain other adjustments and interest, and (b) shares of Madalena stock valued at $13.9 million; and (2) Madalena agreed to acquire from Gran Tierra Petroco Inc., an Alberta corporation (“Petroco”), an indirect subsidiary of the Company, all of the outstanding shares of the Company’s indirect subsidiary Petrolifera Petroleum Limited (“PPL”), and agreed to acquire certain debt owed by PPL , for approximately $10.6 million in cash, plus certain other adjustments and interest. Collectively, GTE Argentina, P.E.T.J.A. S.A., PPL and PPL’s subsidiaries held all of the assets of the Gran Tierra Energy Argentina business unit.

Accordingly, the results of the Company’s Argentina business unit are classified as “Loss from discontinued operations, net of income taxes” on the consolidated statements of operations for the three and nine months ended September 30, 2014, and 2013. Additionally, cash flows of the Company’s Argentina business unit are reflected separately in the interim unaudited condensed consolidated statement of cash flows for the three and nine months ended September 30, 2014 and 2013 as cash provided by or used in operating and investing activities of discontinued operations. Amounts for 2013 have been reclassified to conform to the 2014 presentation. The reclassifications had no effect on net income.

Revenue and other income and loss from discontinued operations for the three and nine months ended September 30, 2014, and 2013, were as follows:

	Three Months Ended September 30,					Nine Months Ended September 30,
(Thousands of U.S. Dollars)	2014		2013			2014			2013
Revenue and other income	$	—	$	18,316		$	31,985		$	55,335
Loss from operations of discontinued operations before income taxes	$	—	$	(4,163	)	$	(6,252	)	$	(6,253	)
Income tax expense	—		(2,993		)	(1,458		)	(4,791		)
Loss from operations of discontinued operations	—		(7,156		)	(7,710		)	(11,044		)
Loss on sale before income taxes	—		—			(18,235		)	—
Income tax expense	—		—			(1,045		)	—
Loss on sale	—		—			(19,280		)	—
Loss from discontinued operations, net of income taxes	$	—	$	(7,156	)	$	(26,990	)	$	(11,044	)

The Company classified the Argentina business unit as held for sale at May 29, 2014. The Company did not meet the criteria to classify the Argentina business unit as held for sale at March 31, 2014, or prior periods. The cost center ceiling with respect to the Company’s Argentina full cost pool exceeded the net capitalized cost of the cost center at March 31, 2014, and as such, no ceiling test writedown was required. In the year ended December 31, 2013, the Company recorded a ceiling test impairment loss of $30.8 million in the Company's Argentina cost center as a result of deferred investment and inconclusive waterflood results.

At December 31, 2013, assets and liabilities related to discontinued operations were as follows:

	As at
(Thousands of U.S. Dollars)	December 31, 2013
Current assets (1)	$	39,125
Property, plant and equipment	94,446
Other long-term assets	1,839
	$	135,410
Current liabilities	$	37,612
Long-term liabilities	9,755
	$	47,367

(1) Included cash of $21.2 million.

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Financial Instruments, Fair Value Measurements and Credit Risk - Fair Value of the Foreign Currency Derivatives, Contingent Consideration and the Contingent Liability (Details) (Ecopetrol Dispute [Member], USD $) In Thousands, unless otherwise specified	9 Months Ended	12 Months Ended
	Sep. 30, 2014	Dec. 31, 2013
Ecopetrol Dispute [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Trading securities (Note 3)	$ 11,711	$ 0
Foreign currency derivative asset	414	0
Assets, Fair Value Disclosure	12,125	0
Foreign currency derivative liability	652	0
Contingent consideration liability	1,061	1,061
Contingent liability (Note 9)	4,400	4,400
Financial and Nonfinancial Liabilities, Fair Value Disclosure	$ 6,113	$ 5,461

XML

Segment and Geographic Reporting - Assets (Details) (USD $) In Thousands, unless otherwise specified	Sep. 30, 2014	Dec. 31, 2013
Segment Reporting Information [Line Items]
Property, plant and equipment	$ 1,294,283	$ 1,260,172
Goodwill	102,581	102,581
All other assets	526,582	541,797
Total Assets	1,923,446	1,904,550
Continuing Operations [Member]
Segment Reporting Information [Line Items]
Property, plant and equipment	1,294,283	1,165,726
Goodwill	102,581	102,581
All other assets	526,582	500,833
Total Assets	1,923,446	1,769,140
Continuing Operations [Member] | Colombia [Member]
Segment Reporting Information [Line Items]
Property, plant and equipment	865,331	850,359
Goodwill	102,581	102,581
All other assets	264,064	233,336
Total Assets	1,231,976	1,186,276
Continuing Operations [Member] | Peru [Member]
Segment Reporting Information [Line Items]
Property, plant and equipment	281,646	178,531
Goodwill	0	0
All other assets	31,439	24,240
Total Assets	313,085	202,771
Continuing Operations [Member] | Brazil [Member]
Segment Reporting Information [Line Items]
Property, plant and equipment	143,938	133,874
Goodwill	0	0
All other assets	19,989	24,477
Total Assets	163,927	158,351
Continuing Operations [Member] | All Other [Member]
Segment Reporting Information [Line Items]
Property, plant and equipment	3,368	2,962
Goodwill	0	0
All other assets	211,090	218,780
Total Assets	214,458	221,742
Discontinued Operations [Member]
Segment Reporting Information [Line Items]
Property, plant and equipment	0	94,446
Goodwill	0	0
All other assets	0	40,964
Total Assets	$ 0	$ 135,410

XML

Segment and Geographic Reporting - Reportable Segments (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended			9 Months Ended
	Sep. 30, 2014	Sep. 30, 2013		Sep. 30, 2014	Sep. 30, 2013
Segment Reporting Information [Line Items]
Oil and natural gas sales	$ 161,517	$ 170,825		$ 460,510	$ 507,315
Interest income	772	519		2,160	1,190
Depletion, depreciation, accretion and impairment	53,936	51,269		140,137	157,323
Income (loss) from continuing operations before income taxes	70,702	82,808		210,054	254,369
Continuing Operations [Member]
Segment Reporting Information [Line Items]
Oil and natural gas sales	161,517	170,825		460,510	507,315
Interest income	772	519		2,160	1,190
Depletion, depreciation, accretion and impairment	53,936	51,269		140,137	157,323
Depletion, depreciation, accretion and impairment - per unit of production	28.40	28.92		27.05	29.59
Income (loss) from continuing operations before income taxes	70,702	82,808		210,054	254,369
Segment capital expenditures (1)	95,419	28,460	[1]	268,859	191,218	[1]
Colombia [Member] | Continuing Operations [Member]
Segment Reporting Information [Line Items]
Oil and natural gas sales	153,815	164,241		438,100	488,577
Interest income	98	111		419	415
Depletion, depreciation, accretion and impairment	51,144	46,821		131,742	141,141
Depletion, depreciation, accretion and impairment - per unit of production	28.31	27.48		26.70	27.58
Income (loss) from continuing operations before income taxes	81,258	89,215		229,750	275,353
Segment capital expenditures (1)	50,785	39,608		147,016	118,758
Peru [Member] | Continuing Operations [Member]
Segment Reporting Information [Line Items]
Oil and natural gas sales	0	0		0	0
Interest income	1	1		1	27
Depletion, depreciation, accretion and impairment	109	73		420	272
Depletion, depreciation, accretion and impairment - per unit of production	0.00	0.00		0.00	0.00
Income (loss) from continuing operations before income taxes	(3,345)	(1,404)		(7,811)	(4,984)
Segment capital expenditures (1)	40,730	11,063		103,535	59,911
Brazil [Member] | Continuing Operations [Member]
Segment Reporting Information [Line Items]
Oil and natural gas sales	7,702	6,584		22,410	18,738
Interest income	433	281		1,292	292
Depletion, depreciation, accretion and impairment	2,429	4,129		7,249	15,143
Depletion, depreciation, accretion and impairment - per unit of production	26.30	59.72		29.24	75.74
Income (loss) from continuing operations before income taxes	1,746	(337)		7,446	(3,663)
Segment capital expenditures (1)	3,377	(22,500)		17,176	12,021
All Other [Member] | Continuing Operations [Member]
Segment Reporting Information [Line Items]
Oil and natural gas sales	0	0		0	0
Interest income	240	126		448	456
Depletion, depreciation, accretion and impairment	254	246		726	767
Depletion, depreciation, accretion and impairment - per unit of production	0.00	0.00		0.00	0.00
Income (loss) from continuing operations before income taxes	(8,957)	(4,666)		(19,331)	(12,337)
Segment capital expenditures (1)	$ 527	$ 289		$ 1,132	$ 528

[1] In the third quarter of 2013, segment capital expenditures were net of proceeds of $54.0 million relating to termination of a farm-in agreement in Brazil. Additionally, segment capital expenditures for the nine months ended September 30, 2013, were net of proceeds of $1.5 million relating to the Company's sale of its 15% working interest in the Mecaya Block in Colombia (Note 5).

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Financial Instruments, Fair Value Measurements and Credit Risk - Gains Recognized in the Statement of Operations (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013
Fair Value Disclosures [Abstract]
Trading securities loss	$ 2,540	$ 0	$ 2,201	$ 0
Foreign currency derivatives loss (gain)	250	0	(4,424)	0
Gain (Loss) on Derivative Instruments, Net, Pretax	$ 2,790	$ 0	$ (2,223)	$ 0

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Segment and Geographic Reporting - Narrative (Details) (USD $) In Thousands, unless otherwise specified	9 Months Ended		3 Months Ended		9 Months Ended		3 Months Ended			9 Months Ended		3 Months Ended	9 Months Ended	3 Months Ended
	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014 Colombia [Member] Ecopetrol [Member]	Sep. 30, 2013 Colombia [Member] Ecopetrol [Member]	Sep. 30, 2014 Colombia [Member] Ecopetrol [Member]	Sep. 30, 2013 Colombia [Member] Ecopetrol [Member]	Sep. 30, 2014 Colombia [Member] Hocol Petroleum Limited [Member]	Sep. 30, 2014 Colombia [Member] Other Customer Number One [Member]	Sep. 30, 2013 Colombia [Member] Other Customer Number One [Member]	Sep. 30, 2014 Colombia [Member] Other Customer Number One [Member]	Sep. 30, 2013 Colombia [Member] Other Customer Number One [Member]	Sep. 30, 2013 Brazil [Member]	Sep. 30, 2014 Colombia [Member] customer	Jun. 30, 2013 Colombia [Member] Mecaya Block [Member]
Concentration Risk [Line Items]
Proceeds from sale of oil and gas properties	$ 0	$ (55,524)										$ (54,000)		$ (1,500)
Working interest sold, percentage														15.00%
Number of major customers													3
Number of other significant customers													1
Sales to Ecopetrol, as a percentage of total revenue (in hundredths)			37.00%	61.00%	46.00%	57.00%	11.00%	38.00%	31.00%	38.00%	32.00%

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Property, Plant and Equipment and Inventory (Details) (USD $) In Thousands, unless otherwise specified	Sep. 30, 2014	Dec. 31, 2013
Property, Plant and Equipment [Line Items]
Cost	$ 2,467,707	$ 2,280,631
Accumulated depletion, depreciation and impairment	(1,173,424)	(1,020,459)
Total Property, Plant and Equipment (Note 5)	1,294,283	1,260,172
Proved [Member]
Property, Plant and Equipment [Line Items]
Cost	1,927,314	1,799,544
Accumulated depletion, depreciation and impairment	(1,159,207)	(1,005,475)
Total Property, Plant and Equipment (Note 5)	768,107	794,069
Unproved [Member]
Property, Plant and Equipment [Line Items]
Cost	516,657	456,001
Accumulated depletion, depreciation and impairment	0	0
Total Property, Plant and Equipment (Note 5)	516,657	456,001
Oil and natural gas properties depletable base under full cost accounting [Member]
Property, Plant and Equipment [Line Items]
Cost	2,443,971	2,255,545
Accumulated depletion, depreciation and impairment	(1,159,207)	(1,005,475)
Total Property, Plant and Equipment (Note 5)	1,284,764	1,250,070
Furniture and fixtures and leasehold improvements [Member]
Property, Plant and Equipment [Line Items]
Cost	9,202	8,919
Accumulated depletion, depreciation and impairment	(7,028)	(6,568)
Total Property, Plant and Equipment (Note 5)	2,174	2,351
Computer equipment [Member]
Property, Plant and Equipment [Line Items]
Cost	13,732	14,786
Accumulated depletion, depreciation and impairment	(6,820)	(7,605)
Total Property, Plant and Equipment (Note 5)	6,912	7,181
Automobiles [Member]
Property, Plant and Equipment [Line Items]
Cost	802	1,381
Accumulated depletion, depreciation and impairment	(369)	(811)
Total Property, Plant and Equipment (Note 5)	$ 433	$ 570

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Significant Accounting Policies

9 Months Ended

Sep. 30, 2014

Accounting Policies [Abstract]

Significant Accounting Policies

Significant Accounting Policies

These interim unaudited condensed consolidated financial statements have been prepared in accordance with generally accepted accounting principles in the United States of America (“GAAP”). The information furnished herein reflects all normal recurring adjustments that are, in the opinion of management, necessary for the fair presentation of results for the interim periods.

The note disclosure requirements of annual consolidated financial statements provide additional disclosures to that required for interim unaudited condensed consolidated financial statements. Accordingly, these interim unaudited condensed consolidated financial statements should be read in conjunction with the Company’s consolidated financial statements as at and for the year ended December 31, 2013, included in the Company’s 2013 Annual Report on Form 10-K, filed with the Securities and Exchange Commission (“SEC”) on February 26, 2014.

The Company’s significant accounting policies are described in Note 2 of the consolidated financial statements which are included in the Company’s 2013 Annual Report on Form 10-K and are the same policies followed in these interim unaudited condensed consolidated financial statements, except as disclosed below. The Company has evaluated all subsequent events through to the date these interim unaudited condensed consolidated financial statements were issued.

Discontinued Operations

During the three months ended June 30, 2014, the Company completed the sale of its Argentina business unit and the discontinued operations criteria of Accounting Standards Codification ("ASC") 205-20, “Discontinued Operations” were met. Therefore, the results of the Company’s Argentina business unit are reflected separately as loss from discontinued operations, net of income taxes in the interim unaudited condensed consolidated statement of operations for the three and nine months ended September 30, 2014 and 2013, on a line immediately after “Income from continuing operations.” Additionally, cash flows of the Company’s Argentina business unit are reflected separately in the interim unaudited condensed consolidated statement of cash flows for the three and nine months ended September 30, 2014 and 2013 as cash provided by or used in operating and investing activities of discontinued operations. Amounts for 2013 have been reclassified to conform to the 2014 presentation. The reclassifications had no effect on net income. See Note 3, “Discontinued Operations,” for additional disclosure. The Company did not recognize depletion, depreciation and accretion expenses subsequent to May 29, 2014, the date the assets were classified as held for sale.

Marketable Securities

The Company acquired investments in marketable securities in connection with the sale of its Argentina business unit. Marketable securities were classified as trading securities, in accordance with ASC 320, “Investments – Debt and Equity Securities”, and are recorded in the consolidated balance sheet at fair value. The Company classifies trading securities as current or non-current based on the intent of management, the nature of the trading securities and whether they are readily available for use in current operations. Gains or losses on trading securities are recorded in the statement of operations as financial instruments gains or losses.

Foreign Currency Derivatives

The Company purchases Colombian peso non-deliverable forward contracts for purposes of fixing exchange rates at which it will purchase or sell Colombian pesos to settle its income tax installment payments. The Company does not intend to issue or hold derivative financial instruments for speculative trading purposes.

The Company records derivative instruments on the balance sheet as either an asset or liability measured at fair value. The accounting for changes in the fair value of a derivative instrument depends on the intended use of the derivative and the resulting designation, which is established at the inception of a derivative. Generally because of the short-term nature of the contracts and their limited use, the Company does not apply hedge accounting, and changes in the fair value of those contracts are reflected in net income as financial instrument gains or losses in the interim unaudited condensed consolidated statement of operations. Cash settlements of the Company's derivative arrangements are classified as operating cash flows.

The fair value of foreign currency derivatives is based on the estimated maturity value of the foreign exchange non-deliverable forward contracts, using applicable forward exchange rates. The most significant variable to the cash flow calculations is the estimation of forward foreign exchange rates. The resulting net future cash inflows or outflows at maturity of the contracts are the net value of the contract.

Recently Adopted Accounting Pronouncements

Obligations Resulting from Joint and Several Liability Arrangements for Which the Total Amount of the Obligation is fixed at the Reporting Date

In February 2013, the Financial Accounting Standards Board (“FASB”) issued Accounting Standards Update (“ASU”) 2013- 04, “Obligations Resulting from Joint and Several Liability Arrangements for Which the Total Amount of the Obligation is fixed at the Reporting Date”. The ASU provides guidance for the recognition, measurement, and disclosure of obligations resulting from joint and several liability arrangements for which the total amount of the obligation is fixed at the reporting date. Examples of obligations within the scope of this update include debt arrangements, other contractual obligations, and settled litigation and judicial rulings. The ASU was effective for fiscal years, and interim periods within those years, beginning after December 15, 2013. The implementation of this update did not materially impact the Company’s consolidated financial position, results of operations, cash flows or disclosure.

Presentation of an Unrecognized Tax Benefit When a Net Operating Loss Carryforward, a Similar Tax Loss, or a Tax Credit Carryforward Exists

In July 2013, the FASB issued ASU 2013-11, “Presentation of an Unrecognized Tax Benefit When a Net Operating Loss Carryforward, a Similar Tax Loss, or a Tax Credit Carryforward Exists". The ASU provides guidance on the financial statement presentation of an unrecognized tax benefit when a net operating loss carryforward, a similar tax loss, or a tax credit carryforward exists. The ASU was effective for fiscal years, and interim periods within those years, beginning after December 15, 2013. The implementation of this update did not materially impact the Company’s consolidated financial position, results of operations, cash flows, or disclosure.

Recently Issued Accounting Pronouncements

Revenue from Contracts with Customers

In May 2014, the FASB issued ASU 2014-09, “Revenue from Contracts with Customers". The ASU creates a single source of revenue guidance for all companies in all industries and requires revenue recognition to depict the transfer of goods or services to customers in an amount that reflects the consideration to which the entity expects to be entitled in exchange for those goods or services. ASU 2014-09 sets forth a new revenue recognition model that requires identifying the contract, identifying the performance obligations, determining the transaction price, allocating the transaction price to performance obligations and recognizing the revenue upon satisfaction of performance obligations. The amendments in the ASU can be applied either retrospectively to each prior reporting period presented or retrospectively with the cumulative effect of initially applying the update recognized at the date of the initial application along with additional disclosures. The ASU will be effective for fiscal years, and interim periods within those years, beginning after December 15, 2016. The Company is currently assessing the impact the new standard will have on its consolidated financial position, results of operations, cash flows, and disclosure.

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Property, Plant and Equipment and Inventory - Narrative (Details) (USD $)	3 Months Ended		9 Months Ended										3 Months Ended									3 Months Ended
	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013	Dec. 31, 2013	Sep. 30, 2014 Colombia [Member]	Dec. 31, 2013 Colombia [Member]	Dec. 31, 2013 Argentina [Member]	Sep. 30, 2014 Peru [Member]	Dec. 31, 2013 Peru [Member]	Sep. 30, 2014 Brazil [Member]	Dec. 31, 2013 Brazil [Member]	Sep. 30, 2013 Brazil [Member]	Jun. 30, 2013 Brazil [Member]	May 31, 2014 Brazil [Member] Proved Reserve [Member] Boe	May 30, 2014 Brazil [Member] Proved Reserve [Member] Boe	May 31, 2014 Brazil [Member] Proved and Probable Reserves [Member] Boe	May 30, 2014 Brazil [Member] Proved and Probable Reserves [Member] Boe	May 31, 2014 Brazil [Member] Probable and Possible [Member] Boe	May 30, 2014 Brazil [Member] Probable and Possible [Member] Boe	Sep. 30, 2014 Four out of Seven Blocks Unproved Oil and Gas Properties [Member] Brazil [Member]	Jun. 30, 2013 Mecaya Block [Member] Colombia [Member]	Sep. 30, 2013 Reconcavo Basin [Member] Brazil [Member]
Property, Plant and Equipment [Line Items]
Depreciation and depletion	$ 49,900,000	$ 51,500,000	$ 140,400,000	$ 150,300,000
Impairment of oil and gas properties														2,000,000
Energy reserves (in BOE)															3,000,000	1,700,000	4,900,000	3,300,000	7,200,000	5,000,000
Proceeds from sale of oil and gas properties			0	(55,524,000)									(54,000,000)									(1,500,000)	(54,000,000)
Working interest sold, percentage																						15.00%
Unproven properties relating to four blocks	1,294,283,000		1,294,283,000		1,260,172,000																3,600,000
Unproved assets by cost center	516,700,000		516,700,000		437,800,000	170,200,000	176,100,000	18,200,000	280,400,000	177,500,000	66,100,000	84,200,000
Crude oil inventories	11,500,000		11,500,000		11,700,000
Supplies	$ 2,400,000		$ 2,400,000		$ 2,000,000

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Taxes - Unrecognized Tax Benefits Rollforward (Details) (USD $) In Thousands, unless otherwise specified	9 Months Ended
	Sep. 30, 2014	Sep. 30, 2013
Reconciliation of Unrecognized Tax Benefits, Excluding Amounts Pertaining to Examined Tax Returns [Roll Forward]
Unrecognized tax benefit relating to continuing operations at beginning of period	$ 2,900	$ 5,900
Increases for positions relating to prior year	1,200	0
Decrease for positions relating to prior year	0	(3,200)
Unrecognized tax benefit relating to continuing operations at end of period	$ 4,100	$ 2,700

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Condensed Consolidated Statements of Operations and Retained Earnings (USD $) In Thousands, except Share data, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013
REVENUE AND OTHER INCOME
Oil and natural gas sales	$ 161,517	$ 170,825	$ 460,510	$ 507,315
Interest income	772	519	2,160	1,190
Total revenue and other income	162,289	171,344	462,670	508,505
EXPENSES
Operating	33,949	25,069	81,161	81,082
Depletion, depreciation, accretion and impairment	53,936	51,269	140,137	157,323
General and administrative	13,350	11,768	40,145	29,880
Foreign exchange (gain) loss	(12,438)	430	(6,604)	(18,549)
Financial instruments loss (gain)	2,790	0	(2,223)	0
Other loss	0	0	0	4,400
Total expenses	91,587	88,536	252,616	254,136
INCOME FROM CONTINUING OPERATIONS BEFORE INCOME TAXES	70,702	82,808	210,054	254,369
Income tax expense	(26,518)	(42,595)	(84,614)	(104,572)
INCOME FROM CONTINUING OPERATIONS	44,184	40,213	125,440	149,797
Loss from discontinued operations, net of income taxes (Note 3)	0	(7,156)	(26,990)	(11,044)
NET INCOME AND COMPREHENSIVE INCOME	44,184	33,057	98,450	138,753
RETAINED EARNINGS, BEGINNING OF PERIOD	465,227	390,369	410,961	284,673
RETAINED EARNINGS, END OF PERIOD	$ 509,411	$ 423,426	$ 509,411	$ 423,426
Basic
INCOME FROM CONTINUING OPERATIONS	$ 0.15	$ 0.15	$ 0.44	$ 0.53
LOSS FROM DISCONTINUED OPERATIONS, NET OF INCOME TAXES	$ 0.00	$ (0.03)	$ (0.09)	$ (0.04)
NET INCOME PER SHARE — BASIC (in dollars per share)	$ 0.15	$ 0.12	$ 0.35	$ 0.49
Diluted
INCOME FROM CONTINUING OPERATIONS	$ 0.15	$ 0.15	$ 0.44	$ 0.53
LOSS FROM DISCONTINUED OPERATIONS, NET OF INCOME TAXES	$ 0.00	$ (0.03)	$ (0.09)	$ (0.04)
NET INCOME PER SHARE — DILUTED (in dollars per share)	$ 0.15	$ 0.12	$ 0.35	$ 0.49
WEIGHTED AVERAGE SHARES OUTSTANDING - BASIC (Note 6)	285,576,898	283,092,224	284,203,679	282,687,871
WEIGHTED AVERAGE SHARES OUTSTANDING - DILUTED (Note 6)	288,059,601	286,026,519	287,569,347	285,820,007

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Financial Instruments, Fair Value Measurements and Credit Risk - Open Foreign Currency Derivative Position (Details) (Foreign Exchange Forward [Member], Forward Contract Expiring February 2015 [Member], COP) In Millions, unless otherwise specified	Sep. 30, 2014
Long [Member]
Derivative [Line Items]
Notional amount	15,811.9
Weighted Average Fixed Rate Received	1,885
Short [Member]
Derivative [Line Items]
Notional amount	10,275.3
Weighted Average Fixed Rate Received	1,895

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Condensed Consolidated Statements of Shareholders' Equity (USD $) In Thousands, unless otherwise specified	Total	Share Capital [Member]	Additional Paid-in Capital [Member]	Retained Earnings [Member]
Balance, beginning of period at Dec. 31, 2012		$ 7,986	$ 998,772	$ 284,673
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Issue of shares of Common Stock		2,201
Exercise of stock options			1,570
Stock-based compensation			8,418
Net income				126,288
Balance, end of period at Dec. 31, 2013	1,429,908	10,187	1,008,760	410,961
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Issue of shares of Common Stock		3
Exercise of stock options			11,174
Stock-based compensation			5,824
Net income	98,450			98,450
Balance, end of period at Sep. 30, 2014	$ 1,545,359	$ 10,190	$ 1,025,758	$ 509,411

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Share Capital - Weighted Average Shares (Details)	3 Months Ended		9 Months Ended
	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]
Weighted average number of common and exchangeable shares outstanding	285,576,898	283,092,224	284,203,679	282,687,871
Weighted average shares issuable pursuant to stock options	8,117,355	12,428,489	9,399,930	10,823,968
Weighted average shares assumed to be purchased from proceeds of stock options	(5,634,652)	(9,494,194)	(6,034,262)	(7,691,832)
Weighted average number of diluted common and exchangeable shares outstanding	288,059,601	286,026,519	287,569,347	285,820,007

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Asset Retirement Obligation (Tables)

9 Months Ended

Sep. 30, 2014

Asset Retirement Obligation [Abstract]

Changes in Asset Retirement Obligations

Changes in the carrying amounts of the asset retirement obligation associated with the Company’s oil and natural gas properties were as follows:

	Nine Months Ended			Year Ended
(Thousands of U.S. Dollars)	September 30, 2014			December 31, 2013
Balance, beginning of period	$	21,973		$	18,292
Settlements	(211		)	(2,068		)
Liability incurred	10,262			2,623
Liabilities associated with the Argentina business unit sold (Note 3)	(10,170		)	—
Foreign exchange	(14		)	(25		)
Accretion	1,022			1,279
Revisions in estimated liability	4,056			1,872
Balance, end of period	$	26,918		$	21,973
Asset retirement obligation - current	$	7,353		$	518
Asset retirement obligation - long-term	19,565			21,455
Balance, end of period	$	26,918		$	21,973

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Share Capital - Narrative (Details) (USD $)	3 Months Ended		9 Months Ended
	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014 vote	Sep. 30, 2013	Dec. 31, 2013
Common Stock, Number of Shares, Par Value and Other Disclosures [Abstract]
Authorized share capital	595,000,002		595,000,002
Common stock, authorized	570,000,000		570,000,000
Common shares, par value (in dollars per share)	$ 0.001		$ 0.001		$ 0.001
Preferred stock, authorized	25,000,000		25,000,000
Preferred stock, par value (in dollars per share)	$ 0.001		$ 0.001
Special voting stock-authorized (in shares)	2		2
Special voting stock-par value (in dollars per share)	$ 0.001		$ 0.001
Common shares, outstanding	276,018,597		276,018,597		272,327,810
Stock issued during period upon exercise of stock options (in shares)			3,029,853
Proceeds from issuance of shares of Common Stock			$ 11,177,000	$ 3,475,000
Votes per common stock			1
Common voting shares per exchangeable share (in shares)			1
Cash received from exercise of stock options				3,500,000
Stock option exercises in period (in shares)			(3,029,853)
Stock Options [Abstract]
Stock-based compensation costs expensed	2,009,000	1,697,000	7,691,000	6,113,000
Loss from discontinued operations, net of income taxes (Note 3)	0	(7,156,000)	(26,990,000)	(11,044,000)
Unrecognized compensation cost related to unvested stock options	8,600,000		8,600,000		8,100,000
Unvested stock options recognition period			2 years 10 months 24 days
Stock Options [Member]
Common Stock, Number of Shares, Par Value and Other Disclosures [Abstract]
Weighted Average Grant Date Fair Value $/Option, Granted in Period	$ 2.21	$ 2.34	$ 2.50	$ 2.62
Earnings Per Share [Abstract]
Options excluded from the diluted income per share calculation	6,884,227	3,472,472	6,925,117	5,584,732
Stock Options [Member] | General and Administrative Expense [Member]
Stock Options [Abstract]
Stock-based compensation costs expensed	2,000,000	1,300,000	6,100,000	5,100,000
Stock Options [Member] | Operating Expense [Member]
Stock Options [Abstract]
Stock-based compensation costs expensed	0	100,000	300,000	400,000
Stock Options [Member] | Discontinued Operations [Member]
Stock Options [Abstract]
Stock-based compensation costs expensed	$ 0	$ 300,000	$ 1,300,000	$ 600,000
Gran Tierra Exchangeco Inc [Member]
Common Stock, Number of Shares, Par Value and Other Disclosures [Abstract]
Exchangeable shares outstanding (in shares)	5,687,379		5,687,379
Exchange shares issued during period			660,934
Gran Tierra Goldstrike Inc [Member]
Common Stock, Number of Shares, Par Value and Other Disclosures [Abstract]
Exchangeable shares outstanding (in shares)	4,534,127		4,534,127

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Financial Instruments, Fair Value Measurements and Credit Risk (Tables)

9 Months Ended

Sep. 30, 2014

Fair Value Disclosures [Abstract]

Fair Value of Foreign Currency Derivatives, Contingent Consideration and Contingent Liability

The fair value of the trading securities, foreign currency derivative assets and liabilities, contingent consideration and the contingent liability related to the Ecopetrol dispute at September 30, 2014, and December 31, 2013, were as follows:

	As at
(Thousands of U.S. Dollars)	September 30, 2014		December 31, 2013
Trading securities (Note 3)	$	11,711	$	—
Foreign currency derivative asset	414		—
	$	12,125	—
Foreign currency derivative liability	$	652	$	—
Contingent consideration liability	1,061		1,061
Contingent liability (Note 9)	4,400		4,400
	$	6,113	$	5,461

Gains Associated with Foreign Currency Derivatives

The following table presents gains or losses on financial instruments recognized in the accompanying interim unaudited condensed consolidated statements of operations:

(Thousands of U.S. Dollars)	Three Months Ended September 30,				Nine Months Ended September 30,
	2014		2013		2014			2013
Trading securities loss	$	2,540	$	—	$	2,201		$	—
Foreign currency derivatives loss (gain)	250		—		(4,424		)	—
	$	2,790	$	—	$	(2,223	)	$	—

Open Foreign Currency Derivative Positions

At September 30, 2014, the Company had the following open foreign currency derivative positions:

Forward contracts
Currency	Contract Type	Notional (Millions of Colombian Pesos)	Weighted Average Fixed Rate Received (Colombian Pesos - U.S. Dollars)	Expiration
Colombian pesos	Buy	15,811.9	1,885	February 2015
Colombian pesos	Sell	10,275.3	1,895	February 2015

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Description of Business

9 Months Ended

Sep. 30, 2014

Organization, Consolidation and Presentation of Financial Statements [Abstract]

Description of Business

Description of Business

Gran Tierra Energy Inc., a Nevada corporation (the “Company” or “Gran Tierra”), is a publicly traded oil and gas company engaged in the acquisition, exploration, development and production of oil and natural gas properties. The Company’s principal business activities are in Colombia, Peru and Brazil. Until June 25, 2014, the Company also had business activities in Argentina (Note 3).

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Condensed Consolidated Balance Sheets (USD $) In Thousands, unless otherwise specified	Sep. 30, 2014	Dec. 31, 2013
Current Assets
Cash and cash equivalents	$ 360,430	$ 428,800
Restricted cash	508	1,478
Accounts receivable	104,436	49,703
Marketable securities	11,711	0
Other financial instruments	414	0
Inventory	13,866	13,725
Taxes receivable	10,937	9,980
Prepaids	3,439	6,450
Deferred tax assets	1,099	2,256
Total Current Assets	506,840	512,392
Oil and Gas Properties (using the full cost method of accounting)
Proved	768,107	794,069
Unproved	516,657	456,001
Total Oil and Gas Properties	1,284,764	1,250,070
Other capital assets	9,519	10,102
Total Property, Plant and Equipment (Note 5)	1,294,283	1,260,172
Other Long-Term Assets
Restricted cash	2,392	2,300
Deferred tax assets	1,696	1,407
Taxes receivable	9,100	18,535
Other long-term assets	6,554	7,163
Goodwill	102,581	102,581
Total Other Long-Term Assets	122,323	131,986
Total Assets	1,923,446	1,904,550
Current Liabilities
Accounts payable	49,178	72,400
Accrued liabilities	89,882	89,567
Other financial instruments	652	0
Taxes payable	29,168	102,887
Deferred tax liabilities	1,461	1,193
Asset retirement obligation	7,353	518
Total Current Liabilities	177,694	266,565
Long-Term Liabilities
Deferred tax liabilities	168,495	177,082
Asset retirement obligation	19,565	21,455
Other long-term liabilities	12,333	9,540
Total Long-Term Liabilities	200,393	208,077
Contingencies
Shareholders’ Equity
Common Stock (Note 6) (276,018,597 and 272,327,810 shares of Common Stock and 10,221,506 and 10,882,440 exchangeable shares, par value $0.001 per share, issued and outstanding as at September 30, 2014, and December 31, 2013, respectively)	10,190	10,187
Additional paid in capital	1,025,758	1,008,760
Retained earnings	509,411	410,961
Total Shareholders’ Equity	1,545,359	1,429,908
Total Liabilities and Shareholders’ Equity	$ 1,923,446	$ 1,904,550

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Significant Accounting Policies (Policies)

9 Months Ended

Sep. 30, 2014

Accounting Policies [Abstract]

Discontinued Operations

Discontinued Operations

During the three months ended June 30, 2014, the Company completed the sale of its Argentina business unit and the discontinued operations criteria of Accounting Standards Codification ("ASC") 205-20, “Discontinued Operations” were met. Therefore, the results of the Company’s Argentina business unit are reflected separately as loss from discontinued operations, net of income taxes in the interim unaudited condensed consolidated statement of operations for the three and nine months ended September 30, 2014 and 2013, on a line immediately after “Income from continuing operations.” Additionally, cash flows of the Company’s Argentina business unit are reflected separately in the interim unaudited condensed consolidated statement of cash flows for the three and nine months ended September 30, 2014 and 2013 as cash provided by or used in operating and investing activities of discontinued operations. Amounts for 2013 have been reclassified to conform to the 2014 presentation. The reclassifications had no effect on net income. See Note 3, “Discontinued Operations,” for additional disclosure. The Company did not recognize depletion, depreciation and accretion expenses subsequent to May 29, 2014, the date the assets were classified as held for sale.

Marketable Securities

Marketable Securities

The Company acquired investments in marketable securities in connection with the sale of its Argentina business unit. Marketable securities were classified as trading securities, in accordance with ASC 320, “Investments – Debt and Equity Securities”, and are recorded in the consolidated balance sheet at fair value. The Company classifies trading securities as current or non-current based on the intent of management, the nature of the trading securities and whether they are readily available for use in current operations. Gains or losses on trading securities are recorded in the statement of operations as financial instruments gains or losses.

Foreign Currency Derivatives

Foreign Currency Derivatives

The Company purchases Colombian peso non-deliverable forward contracts for purposes of fixing exchange rates at which it will purchase or sell Colombian pesos to settle its income tax installment payments. The Company does not intend to issue or hold derivative financial instruments for speculative trading purposes.

The Company records derivative instruments on the balance sheet as either an asset or liability measured at fair value. The accounting for changes in the fair value of a derivative instrument depends on the intended use of the derivative and the resulting designation, which is established at the inception of a derivative. Generally because of the short-term nature of the contracts and their limited use, the Company does not apply hedge accounting, and changes in the fair value of those contracts are reflected in net income as financial instrument gains or losses in the interim unaudited condensed consolidated statement of operations. Cash settlements of the Company's derivative arrangements are classified as operating cash flows.

The fair value of foreign currency derivatives is based on the estimated maturity value of the foreign exchange non-deliverable forward contracts, using applicable forward exchange rates. The most significant variable to the cash flow calculations is the estimation of forward foreign exchange rates. The resulting net future cash inflows or outflows at maturity of the contracts are the net value of the contract.

Recently Issued Accounting Pronouncements

Recently Adopted Accounting Pronouncements

Obligations Resulting from Joint and Several Liability Arrangements for Which the Total Amount of the Obligation is fixed at the Reporting Date

In February 2013, the Financial Accounting Standards Board (“FASB”) issued Accounting Standards Update (“ASU”) 2013- 04, “Obligations Resulting from Joint and Several Liability Arrangements for Which the Total Amount of the Obligation is fixed at the Reporting Date”. The ASU provides guidance for the recognition, measurement, and disclosure of obligations resulting from joint and several liability arrangements for which the total amount of the obligation is fixed at the reporting date. Examples of obligations within the scope of this update include debt arrangements, other contractual obligations, and settled litigation and judicial rulings. The ASU was effective for fiscal years, and interim periods within those years, beginning after December 15, 2013. The implementation of this update did not materially impact the Company’s consolidated financial position, results of operations, cash flows or disclosure.

Presentation of an Unrecognized Tax Benefit When a Net Operating Loss Carryforward, a Similar Tax Loss, or a Tax Credit Carryforward Exists

In July 2013, the FASB issued ASU 2013-11, “Presentation of an Unrecognized Tax Benefit When a Net Operating Loss Carryforward, a Similar Tax Loss, or a Tax Credit Carryforward Exists". The ASU provides guidance on the financial statement presentation of an unrecognized tax benefit when a net operating loss carryforward, a similar tax loss, or a tax credit carryforward exists. The ASU was effective for fiscal years, and interim periods within those years, beginning after December 15, 2013. The implementation of this update did not materially impact the Company’s consolidated financial position, results of operations, cash flows, or disclosure.

Recently Issued Accounting Pronouncements

Revenue from Contracts with Customers

In May 2014, the FASB issued ASU 2014-09, “Revenue from Contracts with Customers". The ASU creates a single source of revenue guidance for all companies in all industries and requires revenue recognition to depict the transfer of goods or services to customers in an amount that reflects the consideration to which the entity expects to be entitled in exchange for those goods or services. ASU 2014-09 sets forth a new revenue recognition model that requires identifying the contract, identifying the performance obligations, determining the transaction price, allocating the transaction price to performance obligations and recognizing the revenue upon satisfaction of performance obligations. The amendments in the ASU can be applied either retrospectively to each prior reporting period presented or retrospectively with the cumulative effect of initially applying the update recognized at the date of the initial application along with additional disclosures. The ASU will be effective for fiscal years, and interim periods within those years, beginning after December 15, 2016. The Company is currently assessing the impact the new standard will have on its consolidated financial position, results of operations, cash flows, and disclosure.

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Document And Entity Information	9 Months Ended
	Sep. 30, 2014	Oct. 31, 2014
Document and Entity Information [Abstract]
Entity Registrant Name	GRAN TIERRA ENERGY INC.
Entity Central Index Key	0001273441
Current Fiscal Year End Date	--12-31
Entity Filer Category	Large Accelerated Filer
Entity Common Stock, Shares Outstanding		276,059,008
Document Fiscal Year Focus	2014
Document Fiscal Period Focus	Q3
Document Type	10-Q
Amendment Flag	false
Document Period End Date	Sep. 30, 2014

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Discontinued Operations (Tables)

9 Months Ended

Sep. 30, 2014

Discontinued Operations and Disposal Groups [Abstract]

Financial disclosures of discontinued operations

Revenue and other income and loss from discontinued operations for the three and nine months ended September 30, 2014, and 2013, were as follows:

	Three Months Ended September 30,					Nine Months Ended September 30,
(Thousands of U.S. Dollars)	2014		2013			2014			2013
Revenue and other income	$	—	$	18,316		$	31,985		$	55,335
Loss from operations of discontinued operations before income taxes	$	—	$	(4,163	)	$	(6,252	)	$	(6,253	)
Income tax expense	—		(2,993		)	(1,458		)	(4,791		)
Loss from operations of discontinued operations	—		(7,156		)	(7,710		)	(11,044		)
Loss on sale before income taxes	—		—			(18,235		)	—
Income tax expense	—		—			(1,045		)	—
Loss on sale	—		—			(19,280		)	—
Loss from discontinued operations, net of income taxes	$	—	$	(7,156	)	$	(26,990	)	$	(11,044	)

At December 31, 2013, assets and liabilities related to discontinued operations were as follows:

	As at
(Thousands of U.S. Dollars)	December 31, 2013
Current assets (1)	$	39,125
Property, plant and equipment	94,446
Other long-term assets	1,839
	$	135,410
Current liabilities	$	37,612
Long-term liabilities	9,755
	$	47,367

(1) Included cash of $21.2 million.

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Condensed Consolidated Balance Sheets (Parenthetical) (USD $)	Sep. 30, 2014	Dec. 31, 2013
Statement of Financial Position [Abstract]
Common shares, par value (in dollars per share)	$ 0.001	$ 0.001
Common shares, issued	276,018,597	272,327,810
Common shares, outstanding	276,018,597	272,327,810
Exchangeable shares, issued	10,221,506	10,882,440
Exchangeable shares, outstanding	10,221,506	10,882,440

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Share Capital

9 Months Ended

Sep. 30, 2014

Disclosure of Compensation Related Costs, Share-based Payments [Abstract]

Share Capital

Share Capital

The Company’s authorized share capital consists of 595,000,002 shares of capital stock, of which 570 million are designated as Common Stock, par value $0.001 per share, 25 million are designated as Preferred Stock, par value $0.001 per share, and two shares are designated as special voting stock, par value $0.001 per share.

As at September 30, 2014, outstanding share capital consists of 276,018,597 shares of Common Stock of the Company, 5,687,379 exchangeable shares of Gran Tierra Exchangeco Inc., (the "Exchangeco exchangeable shares") and 4,534,127 exchangeable shares of Gran Tierra Goldstrike Inc. (the "Goldstrike exchangeable shares"). The redemption date for the Exchangeco exchangeable shares and the Goldstrike exchangeable shares is a date to be established by the applicable Board of Directors. During the nine months ended September 30, 2014, 3,029,853 shares of Common Stock were issued upon the exercise of stock options and 660,934 shares of Common Stock were issued upon the exchange of the Exchangeco exchangeable shares.

The holders of shares of Common Stock are entitled to one vote for each share on all matters submitted to a stockholder vote and are entitled to share in all dividends that the Company’s Board of Directors, in its discretion, declares from legally available funds. The holders of Common Stock have no pre-emptive rights, no conversion rights, and there are no redemption provisions applicable to the shares. Holders of exchangeable shares have substantially the same rights as holders of shares of Common Stock. Each exchangeable share is exchangeable into one share of Common Stock of the Company.

Restricted Stock Units and Stock Options

The Company grants time-vested restricted stock units ("RSUs") to certain officers, employees and consultants. Additionally, the Company grants options to purchase shares of Common Stock to certain directors, officers, employees and consultants. The following table provides information about RSU and stock option activity for the nine months ended September 30, 2014:

	RSUs		Options
	Number of Outstanding Share Units		Number of Outstanding Options		Weighted Average Exercise Price $/Option
Balance, December 31, 2013	922,045		15,668,458		5.41
Granted	903,205		2,407,730		7.06
Exercised	(415,538	)	(3,029,853	)	(3.68	)
Forfeited	(50,980	)	(197,676	)	(6.59	)
Expired	—		(720,724	)	(7.12	)
Balance, September 30, 2014	1,358,732		14,127,935		5.96

For the nine months ended September 30, 2014, 3,029,853 shares of Common Stock were issued for cash proceeds of $11.2 million upon the exercise of stock options (nine months ended September 30, 2013 - $3.5 million).

The weighted average grant date fair value for options granted in the three months ended September 30, 2014, was $2.21 (three months ended September 30, 2013 - $2.34) and for the nine months ended September 30, 2014, was $2.50 (nine months ended September 30, 2013 - $2.62).

The amounts recognized for stock-based compensation were as follows:

(Thousands of U.S. Dollars)	Three Months Ended September 30,						Nine Months Ended September 30,
	2014			2013			2014			2013
Compensation costs for stock options	$	1,961		$	2,133		$	5,824		$	6,314
Compensation costs for RSUs	326			1,282			3,967			1,901
	2,287			3,415			9,791			8,215
Less: Stock-based compensation costs capitalized	(278		)	(1,718		)	(2,100		)	(2,102		)
Stock-based compensation costs expensed	$	2,009		$	1,697		$	7,691		$	6,113

Of the total compensation expense for the three months ended September 30, 2014, $2.0 million (three months ended September 30, 2013 - $1.3 million) was recorded in G&A expenses, $nil (three months ended September 30, 2013 – $0.1 million) was recorded in operating expenses and $nil (three months ended September 30, 2013 – $0.3 million ) was recorded in loss from discontinued operations. Of the total compensation expense for the nine months ended September 30, 2014, $6.1 million (nine months ended September 30, 2013 – $5.1 million) was recorded in G&A expenses, $0.3 million (nine months ended September 30, 2013 – $0.4 million) was recorded in operating expenses and $1.3 million (nine months ended September 30, 2013 - $0.6 million) was recorded in loss from discontinued operations.

At September 30, 2014, there was $8.6 million (December 31, 2013 - $8.1 million) of unrecognized compensation cost related to unvested stock options and RSUs which is expected to be recognized over a weighted average period of 2.9 years. The vesting of certain RSUs and stock options was accelerated as a result of the sale of the Argentina business unit and the retirement of our former Chief Operating Officer.

Income per share

Basic income per share is calculated by dividing net income attributable to common shareholders by the weighted average number of shares of Common Stock and exchangeable shares issued and outstanding during each period. Diluted income per share is calculated by adjusting the weighted average number of shares of Common Stock and exchangeable shares outstanding for the dilutive effect, if any, of share equivalents. The Company uses the treasury stock method to determine the dilutive effect. This method assumes that all Common Stock equivalents have been exercised at the beginning of the period (or at the time of issuance, if later), and that the funds obtained thereby were used to purchase shares of Common Stock of the Company at the volume weighted average trading price of shares of Common Stock during the period.

	Three Months Ended September 30,				Nine Months Ended September 30,
	2014		2013		2014		2013
Weighted average number of common and exchangeable shares outstanding	285,576,898		283,092,224		284,203,679		282,687,871
Weighted average shares issuable pursuant to stock options	8,117,355		12,428,489		9,399,930		10,823,968
Weighted average shares assumed to be purchased from proceeds of stock options	(5,634,652	)	(9,494,194	)	(6,034,262	)	(7,691,832	)
Weighted average number of diluted common and exchangeable shares outstanding	288,059,601		286,026,519		287,569,347		285,820,007

For the three months ended September 30, 2014, 6,884,227 options (three months ended September 30, 2013 - 3,472,472 options) were excluded from the diluted income per share calculation as the options were anti-dilutive. For the nine months ended September 30, 2014, 6,925,117 options (nine months ended September 30, 2013 - 5,584,732 options) were excluded from the diluted income per share calculation as the options were anti-dilutive.

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Property, Plant and Equipment and Inventory

9 Months Ended

Sep. 30, 2014

Property, Plant and Equipment [Abstract]

Property, Plant and Equipment and Inventory

Property, Plant and Equipment and Inventory

Property, Plant and Equipment

	As at September 30, 2014							As at December 31, 2013
(Thousands of U.S. Dollars)	Cost		Accumulated depletion, depreciation and impairment			Net book value		Cost		Accumulated depletion, depreciation and impairment			Net book value
Oil and natural gas properties
Proved	$	1,927,314	$	(1,159,207	)	$	768,107	$	1,799,544	$	(1,005,475	)	$	794,069
Unproved	516,657		—			516,657		456,001		—			456,001
	2,443,971		(1,159,207		)	1,284,764		2,255,545		(1,005,475		)	1,250,070
Furniture and fixtures and leasehold improvements	9,202		(7,028		)	2,174		8,919		(6,568		)	2,351
Computer equipment	13,732		(6,820		)	6,912		14,786		(7,605		)	7,181
Automobiles	802		(369		)	433		1,381		(811		)	570
Total Property, Plant and Equipment	$	2,467,707	$	(1,173,424	)	$	1,294,283	$	2,280,631	$	(1,020,459	)	$	1,260,172

Depletion and depreciation expense from continuing operations on property, plant and equipment for the three months ended September 30, 2014, was $49.9 million (three months ended September 30, 2013 - $51.5 million) and for the nine months ended September 30, 2014, was $140.4 million (nine months ended September 30, 2013 - $150.3 million). A portion of depletion and depreciation expense was recorded as inventory in each period and adjusted for inventory changes. In the second quarter of 2013, the Company recorded a ceiling test impairment loss of $2.0 million in the Company's Brazil cost center as a result of lower realized prices and increased operating costs.

On August 6, 2014, the Company announced proved reserves, net after royalty and calculated in accordance with SEC rules as of May 31, 2014, for the Tiê field, in Brazil increased after production for the five months ended May 31, 2014, to 3.0 MMBOE from 1.7 MMBOE, proved and probable reserves increased to 4.9 MMBOE from 3.3 MMBOE and proved, probable and possible reserves increased to 7.2 MMBOE from 5.0 MMBOE. The reserve revisions were due to new production from the Agua Grande formation, results of seismic reprocessing, and additional reservoir volume in the Sergi formation.

In the second quarter of 2013, the Company received proceeds of $1.5 million relating to a sale of its 15% working interest in the Mecaya Block in Colombia.

During the third quarter of 2013, the Company received a net payment of $54.0 million (before income taxes) from a third party in connection with termination of a farm-in agreement in the Recôncavo Basin relating to Block REC-T-129, Block REC-T-142, Block REC-T-155 and Block REC-T-224.

During the third quarter of 2014, the Agência Nacional de Petróleo, Gás Natural e Biocombustíveis ("ANP") in Brazil granted the Company extensions or suspensions of the first exploration phase of the concession agreements on Blocks REC-T-129, REC-T-142 and REC-T-155 to May 24, 2015. The exploration phase of the concession agreement on Block REC-T-224 was due to expire on December 11, 2013; however, under the concession agreements the Company was able and did submit an application to the ANP for a suspension of the exploration phase of this block. The Company has not yet received a decision from the ANP regarding this suspension application. At September 30, 2014, unproved properties included $3.6 million relating to exploration expenditures on this block. Management assessed this block for impairment at September 30, 2014, and concluded no impairment had occurred.

Unproved oil and natural gas properties consist of exploration lands held in Colombia, Peru and Brazil. As at September 30, 2014, the Company had $170.2 million (December 31, 2013 - $176.1 million) of unproved assets in Colombia, $280.4 million (December 31, 2013 - $177.5 million) of unproved assets in Peru, and $66.1 million (December 31, 2013 - $84.2 million) of unproved assets in Brazil for a total of $516.7 million (December 31, 2013 - $437.8 million). At December 31, 2013, the Company had $18.2 million of unproved assets in Argentina, which were sold as part of the sale of the Argentina business unit on June 25, 2014. Unproved oil and natural gas properties are being held for their exploration value and are not being depleted pending determination of the existence of proved reserves. Gran Tierra will continue to assess the unproved properties over the next several years as proved reserves are established and as exploration warrants whether or not future areas will be developed.

Inventory

At September 30, 2014, oil and supplies inventories were $11.5 million and $2.4 million, respectively (December 31, 2013 - $11.7 million and $2.0 million, respectively).

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Taxes (Tables)

9 Months Ended

Sep. 30, 2014

Income Tax Disclosure [Abstract]

Income tax expense reported reconciliation to computed statutory rate

The income tax expense reported differs from the amount computed by applying the U.S. statutory rate to income from continuing operations before income taxes for the following reasons:

	Nine Months Ended September 30,
(Thousands of U.S. Dollars)	2014			2013
Income (loss) from continuing operations before income taxes
United States	$	(16,450	)	$	(8,488	)
Foreign	226,504			262,857
	210,054			254,369
	35		%	35		%
Income tax expense from continuing operations expected	73,519			89,029
Foreign currency translation adjustments	(1,464		)	(7,263		)
Impact of foreign taxes	(3,361		)	(3,388		)
Other local taxes	3,192			1,497
Stock-based compensation	2,155			1,887
Increase in valuation allowance	2,146			17,975
Non-deductible third party royalty in Colombia	7,554			8,812
Other permanent differences	873			(3,977		)
Total income tax expense from continuing operations	$	84,614		$	104,572
Current income tax expense from continuing operations
United States	$	990		$	813
Foreign	82,193			127,253
	83,183			128,066
Deferred income tax expense (recovery) from continuing operations
Foreign	1,431			(23,494		)
Total income tax expense from continuing operations	$	84,614		$	104,572

Deferred tax assets and liabilities

	As at
(Thousands of U.S. Dollars)	September 30, 2014			December 31, 2013
Deferred Tax Assets
Tax benefit of operating loss carryforwards	$	36,367		$	47,154
Tax basis in excess of book basis	40,257			59,168
Foreign tax credits and other accruals	19,917			34,894
Tax benefit of capital loss carryforwards	29,114			4,769
Deferred tax assets before valuation allowance	125,655			145,985
Valuation allowance	(122,860		)	(142,322		)
	$	2,795		$	3,663
Deferred tax assets - current	$	1,099		$	2,256
Deferred tax assets - long-term	1,696			1,407
	2,795			3,663
Deferred tax liabilities - current	(1,461		)	(1,193		)
Deferred tax liabilities - long-term	(168,495		)	(177,082		)
	(169,956		)	(178,275		)
Net Deferred Tax Liabilities	$	(167,161	)	$	(174,612	)

Schedule of Unrecognized Tax Benefits Roll Forward

Changes in the Company's unrecognized tax benefit relating to continuing operations are as follows:

	Nine Months Ended September 30,
	2014		2013
(Thousands of U.S. Dollars)
Unrecognized tax benefit relating to continuing operations at beginning of period	$	2,900	$	5,900
Increases for positions relating to prior year	1,200		—
Decreases for positions relating to prior year	—		(3,200		)
Unrecognized tax benefit relating to continuing operations at end of period	$	4,100	$	2,700

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Segment and Geographic Reporting (Tables)

9 Months Ended

Sep. 30, 2014

Segment Reporting [Abstract]

Reportable Geographic Segments

The following tables present information on the Company’s reportable segments and other activities:

	Three Months Ended September 30, 2014
(Thousands of U.S. Dollars, except per unit of production amounts)	Colombia		Peru			Brazil			All Other			Total
Oil and natural gas sales	$	153,815	$	—		$	7,702		$	—		$	161,517
Interest income	98		1			433			240			772
Depletion, depreciation, accretion and impairment	51,144		109			2,429			254			53,936
Depletion, depreciation, accretion and impairment - per unit of production	28.31		—			26.30			—			28.40
Income (loss) from continuing operations before income taxes	81,258		(3,345		)	1,746			(8,957		)	70,702
Segment capital expenditures	50,785		40,730			3,377			527			95,419
	Three Months Ended September 30, 2013
(Thousands of U.S. Dollars, except per unit of production amounts)	Colombia		Peru			Brazil			All Other			Total
Oil and natural gas sales	$	164,241	$	—		$	6,584		$	—		$	170,825
Interest income	111		1			281			126			519
Depletion, depreciation, accretion and impairment	46,821		73			4,129			246			51,269
Depletion, depreciation, accretion and impairment - per unit of production	27.48		—			59.72			—			28.92
Income (loss) from continuing operations before income taxes	89,215		(1,404		)	(337		)	(4,666		)	82,808
Segment capital expenditures (1)	39,608		11,063			(22,500		)	289			28,460
	Nine Months Ended September 30, 2014
(Thousands of U.S. Dollars, except per unit of production amounts)	Colombia		Peru			Brazil			All Other			Total
Oil and natural gas sales	$	438,100	$	—		$	22,410		$	—		$	460,510
Interest income	419		1			1,292			448			2,160
Depletion, depreciation, accretion and impairment	131,742		420			7,249			726			140,137
Depletion, depreciation, accretion and impairment - per unit of production	26.70		—			29.24			—			27.05
Income (loss) from continuing operations before income taxes	229,750		(7,811		)	7,446			(19,331		)	210,054
Segment capital expenditures	147,016		103,535			17,176			1,132			268,859
	Nine Months Ended September 30, 2013
(Thousands of U.S. Dollars, except per unit of production amounts)	Colombia		Peru			Brazil			All Other			Total
Oil and natural gas sales	$	488,577	$	—		$	18,738		$	—		$	507,315
Interest income	415		27			292			456			1,190
Depletion, depreciation, accretion and impairment	141,141		272			15,143			767			157,323
Depletion, depreciation, accretion and impairment - per unit of production	27.58		—			75.74			—			29.59
Income (loss) from continuing operations before income taxes	275,353		(4,984		)	(3,663		)	(12,337		)	254,369
Segment capital expenditures (1)	118,758		59,911			12,021			528			191,218

(1) In the third quarter of 2013, segment capital expenditures were net of proceeds of $54.0 million relating to termination of a farm-in agreement in Brazil. Additionally, segment capital expenditures for the nine months ended September 30, 2013, were net of proceeds of $1.5 million relating to the Company's sale of its 15% working interest in the Mecaya Block in Colombia (Note 5).

Long-lived Assets by Geographical Area

	As at September 30, 2014
(Thousands of U.S. Dollars)	Colombia		Peru		Brazil		All Other		Total Excluding Discontinued Operations		Discontinued Operations		Total
Property, plant and equipment	$	865,331	$	281,646	$	143,938	$	3,368	$	1,294,283	$	—	$	1,294,283
Goodwill	102,581		—		—		—		102,581		—		102,581
All other assets	264,064		31,439		19,989		211,090		526,582		—		526,582
Total Assets	$	1,231,976	$	313,085	$	163,927	$	214,458	$	1,923,446	$	—	$	1,923,446
	As at December 31, 2013
(Thousands of U.S. Dollars)	Colombia		Peru		Brazil		All Other		Total Excluding Discontinued Operations		Discontinued Operations		Total
Property, plant and equipment	$	850,359	$	178,531	$	133,874	$	2,962	$	1,165,726	$	94,446	$	1,260,172
Goodwill	102,581		—		—		—		102,581		—		102,581
All other assets	233,336		24,240		24,477		218,780		500,833		40,964		541,797
Total Assets	$	1,186,276	$	202,771	$	158,351	$	221,742	$	1,769,140	$	135,410	$	1,904,550

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Contingencies

9 Months Ended

Sep. 30, 2014

Commitments and Contingencies Disclosure [Abstract]

Contingencies

Contingencies

Gran Tierra Energy Colombia, Ltd. and Petrolifera Petroleum (Colombia) Ltd (collectively “GTEC”) and Ecopetrol, the contracting parties of the Guayuyaco Association Contract, are engaged in a dispute regarding the interpretation of the procedure for allocation of oil produced and sold during the long-term test of the Guayuyaco-1 and Guayuyaco-2 wells, prior to GTEC's purchase of the companies originally involved in the dispute. There was no agreement between the parties, and Ecopetrol filed a lawsuit in the Contravention Administrative Tribunal in the District of Cauca (the "Tribunal") regarding this matter. During the first quarter of 2013, the Tribunal ruled in favor of Ecopetrol and awarded Ecopetrol 44,025 bbl of oil. GTEC has filed an appeal of the ruling to the Supreme Administrative Court (Consejo de Estado) in a second instance procedure. During the three months ended March 31, 2013, based on market oil prices in Colombia, Gran Tierra accrued $4.4 million in the interim unaudited condensed consolidated financial statements in relation to this dispute (Note 10).

Gran Tierra’s production from the Costayaco Exploitation Area is subject to an additional royalty (the "HPR royalty"), which applies when cumulative gross production from an Exploitation Area is greater than five MMbbl. The HPR royalty is calculated on the difference between a trigger price defined in the Chaza Block exploration and production contract (the "Chaza Contract") and the sales price. The Agencia Nacional de Hidrocarburos (National Hydrocarbons Agency) (“ANH”) has interpreted the Chaza Contract as requiring that the HPR royalty must be paid with respect to all production from the Moqueta Exploitation Area and initiated a noncompliance procedure under the Chaza Contract, which was contested by Gran Tierra because the Moqueta Exploitation Area and the Costayaco Exploitation Area are separate Exploitation Areas. ANH did not proceed with that noncompliance procedure. Gran Tierra also believes that the evidence shows that the Costayaco and Moqueta fields are two clearly separate and independent hydrocarbon accumulations. Therefore, it is Gran Tierra’s view that, pursuant to the terms of the Chaza Contract, the HPR royalty is only to be paid with respect to production from the Moqueta Exploitation Area when the accumulated oil production from that Exploitation Area exceeds five MMbbl. Discussions with the ANH have not resolved this issue and Gran Tierra has initiated the dispute resolution process under the Chaza Contract and filed an arbitration claim seeking a decision that the HPR royalty is not payable until production from the Moqueta Exploitation Area exceeds five MMbbl. The ANH filed a response to the claim seeking a declaration that its interpretation is correct and a counterclaim seeking, amongst other remedies, declarations that Gran Tierra breached the Chaza Contract by not paying the disputed HPR royalty, that the amount of the alleged HPR royalty that is payable, and that the Chaza Contract be terminated. Gran Tierra filed a response to the ANH's counterclaim and filed its comments on the ANH's responses to Gran Tierra's claim. The ANH filed an amended counterclaim and Gran Tierra filed a response to the ANH's amended counterclaim. As at September 30, 2014, total cumulative production from the Moqueta Exploitation Area was 3.7 MMbbl. The estimated compensation which would be payable on cumulative production to that date if the ANH is successful in the arbitration is $59.7 million. At this time no amount has been accrued in the interim unaudited condensed consolidated financial statements nor deducted from the Company's reserves for the disputed HPR royalty as Gran Tierra does not consider it probable that a loss will be incurred.

Additionally, the ANH and Gran Tierra are engaged in discussions regarding the interpretation of whether certain transportation and related costs are eligible to be deducted in the calculation of the HPR royalty. Discussions with the ANH are ongoing. Based on the Company's understanding of the ANH's position, the estimated compensation which would be payable if the ANH’s interpretation is correct could be up to $38.9 million as at September 30, 2014. At this time no amount has been accrued in the financial statements as Gran Tierra does not consider it probable that a loss will be incurred.

The Company provided the purchaser of its Argentina business unit with certain indemnifications. The Company remains responsible for certain contingent liabilities related to such indemnifications, subject to defined limitations. The Company does not believe that these obligations are probable of having a material impact on its consolidated financial position, results of operations or cash flows.

In addition to the above, Gran Tierra has several other lawsuits and claims pending. Although the outcome of these other lawsuits and disputes cannot be predicted with certainty, Gran Tierra believes the resolution of these matters would not have a material adverse effect on the Company’s consolidated financial position, results of operations or cash flows. Gran Tierra records costs as they are incurred or become probable and determinable.

Letters of credit

At September 30, 2014, the Company had provided promissory notes totaling $73.6 million (December 31, 2013 - $52.5 million) as security for letters of credit relating to work commitment guarantees contained in exploration contracts and other capital or operating requirements.

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Asset Retirement Obligation

9 Months Ended

Sep. 30, 2014

Asset Retirement Obligation [Abstract]

Asset Retirement Obligation

Asset Retirement Obligation

Changes in the carrying amounts of the asset retirement obligation associated with the Company’s oil and natural gas properties were as follows:

	Nine Months Ended			Year Ended
(Thousands of U.S. Dollars)	September 30, 2014			December 31, 2013
Balance, beginning of period	$	21,973		$	18,292
Settlements	(211		)	(2,068		)
Liability incurred	10,262			2,623
Liabilities associated with the Argentina business unit sold (Note 3)	(10,170		)	—
Foreign exchange	(14		)	(25		)
Accretion	1,022			1,279
Revisions in estimated liability	4,056			1,872
Balance, end of period	$	26,918		$	21,973
Asset retirement obligation - current	$	7,353		$	518
Asset retirement obligation - long-term	19,565			21,455
Balance, end of period	$	26,918		$	21,973

Revisions to estimated liabilities relate primarily to changes in estimates of asset retirement costs and include, but are not limited to, revisions of estimated inflation rates, changes in property lives and the expected timing of settling the asset retirement obligation. At September 30, 2014, the fair value of assets that are legally restricted for purposes of settling the asset retirement obligation was $2.4 million (December 31, 2013 - $1.9 million). These assets are included in restricted cash on the Company's interim unaudited condensed consolidated balance sheet.

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Taxes

9 Months Ended

Sep. 30, 2014

Income Tax Disclosure [Abstract]

Taxes

Taxes

The income tax expense reported differs from the amount computed by applying the U.S. statutory rate to income from continuing operations before income taxes for the following reasons:

	Nine Months Ended September 30,
(Thousands of U.S. Dollars)	2014			2013
Income (loss) from continuing operations before income taxes
United States	$	(16,450	)	$	(8,488	)
Foreign	226,504			262,857
	210,054			254,369
	35		%	35		%
Income tax expense from continuing operations expected	73,519			89,029
Foreign currency translation adjustments	(1,464		)	(7,263		)
Impact of foreign taxes	(3,361		)	(3,388		)
Other local taxes	3,192			1,497
Stock-based compensation	2,155			1,887
Increase in valuation allowance	2,146			17,975
Non-deductible third party royalty in Colombia	7,554			8,812
Other permanent differences	873			(3,977		)
Total income tax expense from continuing operations	$	84,614		$	104,572
Current income tax expense from continuing operations
United States	$	990		$	813
Foreign	82,193			127,253
	83,183			128,066
Deferred income tax expense (recovery) from continuing operations
Foreign	1,431			(23,494		)
Total income tax expense from continuing operations	$	84,614		$	104,572

	As at
(Thousands of U.S. Dollars)	September 30, 2014			December 31, 2013
Deferred Tax Assets
Tax benefit of operating loss carryforwards	$	36,367		$	47,154
Tax basis in excess of book basis	40,257			59,168
Foreign tax credits and other accruals	19,917			34,894
Tax benefit of capital loss carryforwards	29,114			4,769
Deferred tax assets before valuation allowance	125,655			145,985
Valuation allowance	(122,860		)	(142,322		)
	$	2,795		$	3,663
Deferred tax assets - current	$	1,099		$	2,256
Deferred tax assets - long-term	1,696			1,407
	2,795			3,663
Deferred tax liabilities - current	(1,461		)	(1,193		)
Deferred tax liabilities - long-term	(168,495		)	(177,082		)
	(169,956		)	(178,275		)
Net Deferred Tax Liabilities	$	(167,161	)	$	(174,612	)

As at September 30, 2014, the Company had operating loss carryforwards of $122.7 million (December 31, 2013 - $215.4 million) and capital loss carryforwards of $227.0 million (December 31, 2013 – $32.6 million) before valuation allowance. Of these operating loss carryforwards and capital loss carryforwards, $308.8 million (December 31, 2013 - $213.8 million) were losses generated by the foreign subsidiaries of the Company. In certain jurisdictions, the operating loss carryforwards expire between 2014 and 2034 and the capital loss carryforwards expire between 2016 and 2017, while certain other jurisdictions allow operating and capital losses to be carried forward indefinitely.

As at September 30, 2014, the total amount of Gran Tierra’s unrecognized tax benefit related to continuing operations was $4.1 million (December 31, 2013 - $2.9 million), which if recognized would affect the Company’s effective tax rate. To the extent interest and penalties may be assessed by taxing authorities on any underpayment of income tax, such amounts have been accrued and are classified as a component of income taxes in the consolidated statement of operations.

Changes in the Company's unrecognized tax benefit relating to continuing operations are as follows:

	Nine Months Ended September 30,
	2014		2013
(Thousands of U.S. Dollars)
Unrecognized tax benefit relating to continuing operations at beginning of period	$	2,900	$	5,900
Increases for positions relating to prior year	1,200		—
Decreases for positions relating to prior year	—		(3,200		)
Unrecognized tax benefit relating to continuing operations at end of period	$	4,100	$	2,700

The Company and its subsidiaries file income tax returns in U.S. federal and state jurisdictions and certain other foreign jurisdictions. The Company is potentially subject to income tax examinations for the tax years 2006 through 2013 in certain jurisdictions. The Company does not anticipate any material changes to the unrecognized tax benefit disclosed above within the next twelve months.

At September 30, 2014, and December 31, 2013, accounts payable included the remaining unpaid balance of equity tax liability of $nil (December 31, 2013 - $3.3 million), a Colombian tax of 6% on a legislated measure calculated based on the Company’s Colombian segment’s balance sheet equity for tax purposes at January 1, 2011. The tax is payable in eight semi-annual installments over four years, but was expensed in the first quarter of 2011 at the commencement of the four-year period.

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Financial Instruments, Fair Value Measurements and Credit Risk

9 Months Ended

Sep. 30, 2014

Fair Value Disclosures [Abstract]

Financial Instruments, Fair Value Measurements and Credit Risk

Financial Instruments, Fair Value Measurement, Credit Risk and Foreign Exchange Risk

Financial Instruments

At September 30, 2014, the Company’s financial instruments recognized in the balance sheet consist of cash and cash equivalents, restricted cash, accounts receivable, trading securities, accounts payable, accrued liabilities, foreign currency derivatives included in current assets and liabilities and contingent consideration and contingent liability included in other long-term liabilities.

Fair Value Measurement

The fair value of the trading securities, foreign currency derivatives, contingent consideration and contingent liability are being remeasured at the estimated fair value at each reporting period.

The fair value of the trading securities which were received as consideration on the sale of the Company's Argentina business unit (Note 3) was estimated based on quoted market prices in an active market.

The fair value of foreign currency derivatives was based on the estimated maturity value of foreign exchange non-deliverable forward contracts using applicable forward exchange rates. The most significant variable to the cash flow calculations is the estimation of forward foreign exchange rates. The resulting future cash inflows or outflows at maturity of the contracts are the net value of the contract.

The fair value of the contingent consideration, which relates to the acquisition of the remaining 30% working interest in certain properties in Brazil, was estimated based on the consideration expected to be transferred and discounted back to present value by applying an appropriate discount rate that reflected the risk factors associated with the payment streams. The discount rate used is determined in accordance with accepted valuation methods.

The fair value of the contingent liability which relates to a dispute with Ecopetrol (Note 9) was estimated based on the fair value of the amount awarded using market oil prices in Colombia.

The fair value of the trading securities, foreign currency derivative assets and liabilities, contingent consideration and the contingent liability related to the Ecopetrol dispute at September 30, 2014, and December 31, 2013, were as follows:

	As at
(Thousands of U.S. Dollars)	September 30, 2014		December 31, 2013
Trading securities (Note 3)	$	11,711	$	—
Foreign currency derivative asset	414		—
	$	12,125	—
Foreign currency derivative liability	$	652	$	—
Contingent consideration liability	1,061		1,061
Contingent liability (Note 9)	4,400		4,400
	$	6,113	$	5,461

The following table presents gains or losses on financial instruments recognized in the accompanying interim unaudited condensed consolidated statements of operations:

(Thousands of U.S. Dollars)	Three Months Ended September 30,				Nine Months Ended September 30,
	2014		2013		2014			2013
Trading securities loss	$	2,540	$	—	$	2,201		$	—
Foreign currency derivatives loss (gain)	250		—		(4,424		)	—
	$	2,790	$	—	$	(2,223	)	$	—

These losses and gains are presented as financial instruments loss or gain in the interim unaudited condensed consolidated statements of operations and cash flows.

The fair value of long-term restricted cash approximates its carrying value because interest rates are variable and reflective of market rates. The fair values of other financial instruments approximate their carrying amounts due to the short-term maturity of these instruments.

GAAP establishes a fair value hierarchy that prioritizes the inputs to valuation techniques used to measure fair value. This hierarchy consists of three broad levels. Level 1 inputs consist of quoted prices (unadjusted) in active markets for identical assets and liabilities and have the highest priority. Level 2 and 3 inputs are based on significant other observable inputs and significant unobservable inputs, respectively, and have lower priorities. The Company uses appropriate valuation techniques based on the available inputs to measure the fair values of assets and liabilities.

At September 30, 2014, the fair value of the trading securities acquired in connection with the disposal of the Argentina business unit (Note 3) was determined using Level 1 inputs. At September 30, 2014, the fair value of the foreign currency derivatives was determined using Level 2 inputs. At September 30, 2014, and December 31, 2013, the fair value of the contingent consideration payable in connection with the Brazil acquisition was determined using Level 3 inputs and the fair value of the contingent liability which relates to a dispute with Ecopetrol (Note 9) was determined using Level 1 inputs. The disclosure in the paragraph above regarding the fair value of cash and restricted cash is based on Level 1 inputs.

The Company’s non-recurring fair value measurements include asset retirement obligations. The fair value of an asset retirement obligation is measured by reference to the expected future cash outflows required to satisfy the retirement obligation discounted at the Company’s credit-adjusted risk-free interest rate. The significant level 3 inputs used to calculate such liabilities include estimates of costs to be incurred, the Company’s credit-adjusted risk-free interest rate, inflation rates and estimated dates of abandonment. Accretion expense is recognized over time as the discounted liabilities are accreted to their expected settlement value, while the asset retirement cost is amortized over the estimated productive life of the related assets.

Credit Risk

Credit risk arises from the potential that the Company may incur a loss if a counterparty to a financial instrument fails to meet its obligation in accordance with agreed terms. The Company’s financial instruments that are exposed to concentrations of credit risk consist primarily of cash, accounts receivables and foreign currency derivatives. The carrying value of cash, accounts receivable and foreign currency derivatives reflects management’s assessment of credit risk.

At September 30, 2014, cash and cash equivalents and restricted cash included balances in savings and checking accounts, as well as term deposits and certificates of deposit, placed primarily with financial institutions with strong investment grade ratings or governments, or the equivalent in the Company’s operating areas.

The Company purchases non-deliverable forward contracts for purposes of fixing exchange rates at which it will purchase or sell Colombian pesos to settle its income tax installment payments. With the exception of these foreign currency derivatives, any foreign currency transactions are conducted on a spot basis with major financial institutions in the Company’s operating areas.

At September 30, 2014, the Company had the following open foreign currency derivative positions:

Forward contracts
Currency	Contract Type	Notional (Millions of Colombian Pesos)	Weighted Average Fixed Rate Received (Colombian Pesos - U.S. Dollars)	Expiration
Colombian pesos	Buy	15,811.9	1,885	February 2015
Colombian pesos	Sell	10,275.3	1,895	February 2015

For the nine months ended September 30, 2014, 95% (nine months ended September 30, 2013 - 96%) of the Company's revenue and other income from continuing operations was generated in Colombia.

Foreign Exchange Risk

Unrealized foreign exchange gains and losses primarily result from fluctuation of the U.S. dollar to the Colombian peso due to Gran Tierra’s current and deferred tax liabilities, which are monetary liabilities mainly denominated in the local currency of the Colombian operations. As a result, foreign exchange gains and losses must be calculated on conversion to the U.S. dollar functional currency. A strengthening in the Colombian peso against the U.S. dollar results in foreign exchange losses, estimated at $80,000 for each one peso decrease in the exchange rate of the Colombian peso to one U.S. dollar.

In Colombia, the company receives 100% of its revenues in U.S. dollars and the majority of its capital expenditures are in U.S. dollars or are based on U.S. dollar prices. In Brazil, prices for oil are in U.S. dollars, but revenues are received in local currency translated according to current exchange rates. The majority of the Company's capital expenditures within Brazil are based on U.S. dollar prices, but are paid in local currency translated according to current exchange rates. In Peru, capital expenditures are based on U.S. dollar prices and may be paid in local currency or U.S. dollars.

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Share Capital - Allocation of Share Based Compensation (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Compensation cost	$ 2,287	$ 3,415	$ 9,791	$ 8,215
Less: Stock-based compensation costs capitalized	(278)	(1,718)	(2,100)	(2,102)
Stock-based compensation costs expensed	2,009	1,697	7,691	6,113
Stock Options [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Compensation cost	1,961	2,133	5,824	6,314
RSUs [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Compensation cost	$ 326	$ 1,282	$ 3,967	$ 1,901

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Share Capital (Tables)

9 Months Ended

Sep. 30, 2014

Disclosure of Compensation Related Costs, Share-based Payments [Abstract]

RSU's and Stock options outstanding

The following table provides information about RSU and stock option activity for the nine months ended September 30, 2014:

	RSUs		Options
	Number of Outstanding Share Units		Number of Outstanding Options		Weighted Average Exercise Price $/Option
Balance, December 31, 2013	922,045		15,668,458		5.41
Granted	903,205		2,407,730		7.06
Exercised	(415,538	)	(3,029,853	)	(3.68	)
Forfeited	(50,980	)	(197,676	)	(6.59	)
Expired	—		(720,724	)	(7.12	)
Balance, September 30, 2014	1,358,732		14,127,935		5.96

Amounts recognized for stock-based compensation

The amounts recognized for stock-based compensation were as follows:

(Thousands of U.S. Dollars)	Three Months Ended September 30,						Nine Months Ended September 30,
	2014			2013			2014			2013
Compensation costs for stock options	$	1,961		$	2,133		$	5,824		$	6,314
Compensation costs for RSUs	326			1,282			3,967			1,901
	2,287			3,415			9,791			8,215
Less: Stock-based compensation costs capitalized	(278		)	(1,718		)	(2,100		)	(2,102		)
Stock-based compensation costs expensed	$	2,009		$	1,697		$	7,691		$	6,113

Weighted average shares outstanding

	Three Months Ended September 30,				Nine Months Ended September 30,
	2014		2013		2014		2013
Weighted average number of common and exchangeable shares outstanding	285,576,898		283,092,224		284,203,679		282,687,871
Weighted average shares issuable pursuant to stock options	8,117,355		12,428,489		9,399,930		10,823,968
Weighted average shares assumed to be purchased from proceeds of stock options	(5,634,652	)	(9,494,194	)	(6,034,262	)	(7,691,832	)
Weighted average number of diluted common and exchangeable shares outstanding	288,059,601		286,026,519		287,569,347		285,820,007

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Discontinued Operations - Assets and Liabilities Related to Discontinued Operations (Details) (USD $)	Dec. 31, 2013
Discontinued Operations and Disposal Groups [Abstract]
Current assets	$ 39,125,000	[1]
Property, plant and equipment	94,446,000
Other long-term assets	1,839,000
Total assets	135,410,000
Current liabilities	37,612,000
Long-term liabilities	9,755,000
Total liabilities	47,367,000
Cash	$ 21,200,000

[1] Included cash of $21.2 million.

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Taxes - Narrative (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended		3 Months Ended	9 Months Ended
	Dec. 31, 2013	Sep. 30, 2014	Mar. 31, 2011 Colombia [Member] installment	Sep. 30, 2014 Colombia [Member]	Dec. 31, 2013 Colombia [Member]
Income Tax Disclosure [Abstract]
Operating loss carryforwards	$ 215.4	$ 122.7
Capital losses before valuation allowance	32.6	227.0
Net operating loss and capital loss carryforward from foreign subsidiaries	213.8	308.8
Income Tax Examination [Line Items]
Foreign equity tax payable				$ 0	$ 3.3
Equity tax rate (in hundredths)	6.00%			6.00%
Equity tax for foreign operations - Columbia, number of semi-annual installments			8
Equity tax for foreign operations - Columbia, assessment term (in years)			4 years

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Condensed Consolidated Statements of Cash Flows (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013
Operating Activities
Net income	$ 44,184	$ 33,057	$ 98,450	$ 138,753
Adjustments to reconcile net income to net cash provided by operating activities:
Loss from discontinued operations, net of income taxes	0	7,156	26,990	11,044
Depletion, depreciation, accretion and impairment	53,936	51,269	140,137	157,323
Foreign			1,431	(23,494)
Non-cash stock-based compensation			4,341	5,505
Unrealized foreign exchange gain			(9,251)	(16,850)
Unrealized financial instruments loss			2,439	0
Equity tax			(3,283)	(3,345)
Cash settlement of asset retirement obligation			(211)	(927)
Other loss	0	0	0	4,400
Net change in assets and liabilities from operating activities of continuing operations
Accounts receivable and other long-term assets			(61,224)	(35,574)
Inventory			(1,688)	12,592
Prepaids			2,565	(1,090)
Accounts payable and accrued and other liabilities			(981)	(8,332)
Taxes receivable and payable			(55,084)	80,932
Net cash provided by operating activities of continuing operations			144,631	320,937
Net cash (used in) provided by operating activities of discontinued operations			(4,792)	28,150
Net cash provided by operating activities			139,839	349,087
Investing Activities
Decrease (increase) in restricted cash			877	(4,936)
Additions to property, plant and equipment			(250,634)	(249,606)
Proceeds from sale of Argentina business unit, net of cash sold and transaction costs			42,755	0
Proceeds from sale of oil and gas properties			0	55,524
Net cash used in investing activities of continuing operations			(207,002)	(199,018)
Net cash used in investing activities of discontinued operations			(12,384)	(13,104)
Net cash used in investing activities			(219,386)	(212,122)
Financing Activities
Proceeds from issuance of shares of Common Stock			11,177	3,475
Net cash provided by financing activities			11,177	3,475
Net (decrease) increase in cash and cash equivalents			(68,370)	140,440
Cash and cash equivalents, beginning of period			428,800	212,624
Cash and cash equivalents, end of period	360,430	353,064	360,430	353,064
Cash	229,018	296,520	229,018	296,520
Term deposits	131,412	56,544	131,412	56,544
Supplemental cash flow disclosures:
Cash paid for income taxes			118,540	38,978
Non-cash investing activities:
Net liabilities related to property, plant and equipment, end of period	$ 72,410	$ 65,645	$ 72,410	$ 65,645

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Segment and Geographic Reporting

9 Months Ended

Sep. 30, 2014

Segment Reporting [Abstract]

Segment and Geographic Reporting

Segment and Geographic Reporting

The Company is primarily engaged in the exploration and production of oil and natural gas. The Company’s reportable segments are Colombia, Peru and Brazil based on geographic organization. Prior to classifying the Company’s Argentina business unit as discontinued operations (Note 3), Argentina was a reportable segment. The All Other category represents the Company’s corporate activities. The amounts disclosed in the tables below exclude the results of the Argentina business unit unless otherwise noted. Certain subsidiaries which were previously included in the All Other category were sold as part of the Argentina business unit, and therefore amounts disclosed in the All Other category have been reclassified to exclude amounts reported in loss from discontinued operations. The Company evaluates reportable segment performance based on income or loss from continuing operations before income taxes.

The following tables present information on the Company’s reportable segments and other activities:

	Three Months Ended September 30, 2014
(Thousands of U.S. Dollars, except per unit of production amounts)	Colombia		Peru			Brazil			All Other			Total
Oil and natural gas sales	$	153,815	$	—		$	7,702		$	—		$	161,517
Interest income	98		1			433			240			772
Depletion, depreciation, accretion and impairment	51,144		109			2,429			254			53,936
Depletion, depreciation, accretion and impairment - per unit of production	28.31		—			26.30			—			28.40
Income (loss) from continuing operations before income taxes	81,258		(3,345		)	1,746			(8,957		)	70,702
Segment capital expenditures	50,785		40,730			3,377			527			95,419
	Three Months Ended September 30, 2013
(Thousands of U.S. Dollars, except per unit of production amounts)	Colombia		Peru			Brazil			All Other			Total
Oil and natural gas sales	$	164,241	$	—		$	6,584		$	—		$	170,825
Interest income	111		1			281			126			519
Depletion, depreciation, accretion and impairment	46,821		73			4,129			246			51,269
Depletion, depreciation, accretion and impairment - per unit of production	27.48		—			59.72			—			28.92
Income (loss) from continuing operations before income taxes	89,215		(1,404		)	(337		)	(4,666		)	82,808
Segment capital expenditures (1)	39,608		11,063			(22,500		)	289			28,460
	Nine Months Ended September 30, 2014
(Thousands of U.S. Dollars, except per unit of production amounts)	Colombia		Peru			Brazil			All Other			Total
Oil and natural gas sales	$	438,100	$	—		$	22,410		$	—		$	460,510
Interest income	419		1			1,292			448			2,160
Depletion, depreciation, accretion and impairment	131,742		420			7,249			726			140,137
Depletion, depreciation, accretion and impairment - per unit of production	26.70		—			29.24			—			27.05
Income (loss) from continuing operations before income taxes	229,750		(7,811		)	7,446			(19,331		)	210,054
Segment capital expenditures	147,016		103,535			17,176			1,132			268,859
	Nine Months Ended September 30, 2013
(Thousands of U.S. Dollars, except per unit of production amounts)	Colombia		Peru			Brazil			All Other			Total
Oil and natural gas sales	$	488,577	$	—		$	18,738		$	—		$	507,315
Interest income	415		27			292			456			1,190
Depletion, depreciation, accretion and impairment	141,141		272			15,143			767			157,323
Depletion, depreciation, accretion and impairment - per unit of production	27.58		—			75.74			—			29.59
Income (loss) from continuing operations before income taxes	275,353		(4,984		)	(3,663		)	(12,337		)	254,369
Segment capital expenditures (1)	118,758		59,911			12,021			528			191,218

(1) In the third quarter of 2013, segment capital expenditures were net of proceeds of $54.0 million relating to termination of a farm-in agreement in Brazil. Additionally, segment capital expenditures for the nine months ended September 30, 2013, were net of proceeds of $1.5 million relating to the Company's sale of its 15% working interest in the Mecaya Block in Colombia (Note 5).

	As at September 30, 2014
(Thousands of U.S. Dollars)	Colombia		Peru		Brazil		All Other		Total Excluding Discontinued Operations		Discontinued Operations		Total
Property, plant and equipment	$	865,331	$	281,646	$	143,938	$	3,368	$	1,294,283	$	—	$	1,294,283
Goodwill	102,581		—		—		—		102,581		—		102,581
All other assets	264,064		31,439		19,989		211,090		526,582		—		526,582
Total Assets	$	1,231,976	$	313,085	$	163,927	$	214,458	$	1,923,446	$	—	$	1,923,446
	As at December 31, 2013
(Thousands of U.S. Dollars)	Colombia		Peru		Brazil		All Other		Total Excluding Discontinued Operations		Discontinued Operations		Total
Property, plant and equipment	$	850,359	$	178,531	$	133,874	$	2,962	$	1,165,726	$	94,446	$	1,260,172
Goodwill	102,581		—		—		—		102,581		—		102,581
All other assets	233,336		24,240		24,477		218,780		500,833		40,964		541,797
Total Assets	$	1,186,276	$	202,771	$	158,351	$	221,742	$	1,769,140	$	135,410	$	1,904,550

The Company’s revenues are derived principally from uncollateralized sales to customers in the oil and natural gas industry. The concentration of credit risk in a single industry affects the Company’s overall exposure to credit risk because customers may be similarly affected by changes in economic and other conditions.

In the three months ended September 30, 2014, the Company had three significant customers in Colombia: Ecopetrol S.A. ("Ecopetrol"), Hocol Petroleum Limited ("Hocol") and one other customer, which accounted for 37%, 11% and 38%, respectively, of the Company's consolidated oil and natural gas sales from continuing operations. For the three months ended September 30, 2013, sales to Ecopetrol and the other customer accounted for 61% and 31%, respectively, of the Company's consolidated oil and natural gas sales from continuing operations. In the nine months ended September 30, 2014 and 2013, sales to Ecopetrol accounted for 46% and 57%, respectively, and sales to the other customer accounted for 38% and 32%, respectively, of the Company's consolidated oil and natural gas sales from continuing operations. Sales to Hocol were not significant in the nine months ended September 30, 2014, or in the three and nine months ended September 30, 2013.

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Discontinued Operations - Narrative (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended	0 Months Ended		0 Months Ended
	Dec. 31, 2013 Argentina [Member]	Jun. 25, 2014 Argentina Business Unit [Member]	Jun. 25, 2014 Argentina Business Unit [Member]	Jun. 25, 2014 Argentina Business Unit [Member] GTE ULC and PCESA [Member]	Jun. 25, 2014 Argentina Business Unit [Member] Petroco [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Aggregate consideration			$ 69.3
Cash received		55.4		44.8	10.6
Value of shares received				13.9
Impairment loss	$ 30.8

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Taxes - Income Tax Reconciliation (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013
Income (loss) from continuing operations before income taxes
United States			$ (16,450)	$ (8,488)
Foreign			226,504	262,857
INCOME FROM CONTINUING OPERATIONS BEFORE INCOME TAXES	70,702	82,808	210,054	254,369
Income Tax Expense (Benefit), Continuing Operations, Income Tax Reconciliation [Abstract]
Effective income tax rate			35.00%	35.00%
Income tax expense from continuing operations expected			73,519	89,029
Foreign currency translation adjustments			(1,464)	(7,263)
Impact of foreign taxes			(3,361)	(3,388)
Other local taxes			3,192	1,497
Stock-based compensation			2,155	1,887
Increase in valuation allowance			2,146	17,975
Non-deductible third party royalty in Colombia			7,554	8,812
Other permanent differences			873	(3,977)
Total income tax expense from continuing operations	26,518	42,595	84,614	104,572
Current income tax expense from continuing operations
United States			990	813
Foreign			82,193	127,253
Total Current income tax expense			83,183	128,066
Deferred income tax expense (recovery) from continuing operations
Foreign			$ 1,431	$ (23,494)

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Property, Plant and Equipment and Inventory (Tables)

9 Months Ended

Sep. 30, 2014

Property, Plant and Equipment [Abstract]

Schedule of Property, Plant and Equipment

Property, Plant and Equipment

	As at September 30, 2014							As at December 31, 2013
(Thousands of U.S. Dollars)	Cost		Accumulated depletion, depreciation and impairment			Net book value		Cost		Accumulated depletion, depreciation and impairment			Net book value
Oil and natural gas properties
Proved	$	1,927,314	$	(1,159,207	)	$	768,107	$	1,799,544	$	(1,005,475	)	$	794,069
Unproved	516,657		—			516,657		456,001		—			456,001
	2,443,971		(1,159,207		)	1,284,764		2,255,545		(1,005,475		)	1,250,070
Furniture and fixtures and leasehold improvements	9,202		(7,028		)	2,174		8,919		(6,568		)	2,351
Computer equipment	13,732		(6,820		)	6,912		14,786		(7,605		)	7,181
Automobiles	802		(369		)	433		1,381		(811		)	570
Total Property, Plant and Equipment	$	2,467,707	$	(1,173,424	)	$	1,294,283	$	2,280,631	$	(1,020,459	)	$	1,260,172