10-Q

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C.  20549

FORM 10-Q

ý       QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d)

OF THE SECURITIES EXCHANGE ACT OF 1934

For the quarterly period ended March 31, 2010

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: 1-13245

PIONEER NATURAL RESOURCES COMPANY

 (Exact name of Registrant as specified in its charter)

Delaware	75-2702753
(State or other jurisdiction of                      incorporation or organization)	(I.R.S. Employer          Identification No.)
5205 N. O'Connor Blvd., Suite 200, Irving, Texas	75039
(Address of principal executive offices)	(Zip Code)

(972) 444-9001

(Registrant's telephone number, including area code)

Not applicable

(Former name, former address and former fiscal year, if changed since last report)

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 has submitted electronically and posted on its corporate Web site, 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	ý		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 Exchange Act).

Yes   o      No   ý

Number of shares of Common Stock outstanding as of May 3, 2010 115,929,792

PIONEER NATURAL RESOURCES COMPANY

TABLE OF CONTENTS

	Page
Cautionary Statement Concerning Forward-Looking Statements	3
Definitions of Certain Terms and Conventions Used Herein	4
PART I.   FINANCIAL INFORMATION
Item 1.        Financial Statements
Consolidated Balance Sheets as of March 31, 2010 and December 31, 2009	5
Consolidated Statements of Operations for the three months ended March 31, 2010 and 2009	7
Consolidated Statement of Stockholders' Equity for the three months ended March 31, 2010	8
Consolidated Statements of Cash Flows for the three months ended March 31, 2010 and 2009	9
Consolidated Statements of Comprehensive Income (Loss) for the three months ended March 31, 2010 and 2009	10
Notes to Consolidated Financial Statements	11
Item 2.        Management's Discussion and Analysis of Financial Condition and Results of Operations	34
Item 3.        Quantitative and Qualitative Disclosures About Market Risk	46
Item 4.        Controls and Procedures	49
PART II.   OTHER INFORMATION
Item 1.        Legal Proceedings	50
Item 1A.    Risk Factors	50
Item 2.        Unregistered Sales of Equity Securities and Use of Proceeds	50
Item 6.        Exhibits	51
Signatures	52
Exhibit Index	53

2

PIONEER NATURAL RESOURCES COMPANY

Cautionary Statement Concerning Forward-Looking Statements

The information in this Quarterly Report on Form 10-Q (the "Report") contains forward-looking statements that involve risks and uncertainties. When used in this document, the words "believes," "plans," "expects," "anticipates," "intends," "continue," "may," "will," "could," "should," "future," "potential," "estimate," or the negative of such terms and similar expressions as they relate to Pioneer Natural Resources Company ("Pioneer" or the "Company") are intended to identify forward-looking statements. The forward-looking statements are based on the Company's current expectations, assumptions, estimates and projections about the Company and the industry in which the Company operates. Although the Company believes that the expectations and assumptions reflected in the forward-looking statements are reasonable, they involve risks and uncertainties that are difficult to predict and, in many cases, beyond the Company's control.

These risks and uncertainties include, among other things, volatility of commodity prices, product supply and demand, competition, the ability to obtain environmental and other permits and the timing thereof, other government regulation or action, the ability to obtain approvals from third parties and negotiate agreements (including joint venture agreements) with third parties on mutually acceptable terms, international operations and associated international political and economic instability, litigation, the costs and results of drilling and operations, access to and availability of drilling equipment and transportation, processing and refining facilities, Pioneer's ability to replace reserves, implement its business plans or complete its development activities as scheduled, access to and cost of capital, the fin ancial strength of counterparties to Pioneer's credit facility and derivative contracts and the purchasers of Pioneer's oil, NGL and gas production, uncertainties about estimates of reserves and resource potential and the ability to add proved reserves in the future, the assumptions underlying production forecasts, quality of technical data, environmental and weather risks, including the possible impact of climate change, and acts of war or terrorism. These and other risks are described in the Company's Annual Report on Form 10-K, this and other Quarterly Reports on Form 10-Q and other filings with the Securities and Exchange Commission. In addition, the Company may be subject to currently unforeseen risks that may have a materially adverse effect on it. Accordingly, no assurances can be given that the actual events and results will not be materially different than the anticipated results described in the forward-looking statements. See "Part I, Item 3. Quantitative and Qualitative Disclosures About Mar ket Risk" and "Part II, Item 1A. Risk Factors" in this Report and "Part I, Item 1. Business — Competition, Markets and Regulations", "Part I, Item 1A. Risk Factors", “Part II, Item 7. Management’s Discussion and Analysis of Financial Condition and Results of Operations” and "Part II, Item 7A. Quantitative and Qualitative Disclosures About Market Risk" in the Company's Annual Report on Form 10-K for the year ended December 31, 2009 for a description of various factors that could materially affect the ability of Pioneer to achieve the anticipated results described in the forward-looking statements. Readers are cautioned not to place undue reliance on forward-looking statements, which speak only as of the date hereof.  The Company undertakes no duty to publicly update these statements except as required by law.

3

PIONEER NATURAL RESOURCES COMPANY

Definitions of Certain Terms and Conventions Used Herein

Within this Report, the following terms and conventions have specific meanings:

• "Bbl" means a standard barrel containing 42 United States gallons.

• "Bcf"means one billion cubic feet.

• "BOE"means a barrel of oil equivalent and is a standard convention used to express oil and gas volumes on a comparable oil equivalent basis. Gas equivalents are determined under the relative energy content method by using the ratio of 6.0 Mcf of gas to 1.0 Bbl of oil or natural gas liquid.

• "BOEPD"means BOE per day.

• "Btu"means British thermal unit, which is a measure of the amount of energy required to raise the temperature of one pound of water one degree Fahrenheit.

• "CBM"means coal bed methane.

• "DD&A"means depletion, depreciation and amortization.

• "GAAP"means accounting principles that are generally accepted in the United States of America.

• "LIBOR"means London Interbank Offered Rate, which is a market rate of interest.

• "MBbl"means one thousand Bbls.

• "MBOE"means one thousand BOEs.

• "Mcf"means one thousand cubic feet and is a measure of natural gas volume.

• "MMBbl"means one million Bbls.

• "MMBOE"means one million BOEs.

• "MMBtu"means one million Btus.

• "MMcf"means one million cubic feet.

• "MMcfpd"means one million cubic feet per day.

• "Mont Belvieu–posted-price" means the daily average natural gas liquids components as priced in Oil Price Information Service ("OPIS") in the table "U.S. and Canada LP – Gas Weekly Averages" at Mont Belvieu, Texas.

• "NGL"means natural gas liquid.

• "NYMEX"means the New York Mercantile Exchange.

• "NYSE"means the New York Stock Exchange.

• "Pioneer"or the "Company"means Pioneer Natural Resources Company and its subsidiaries.

• "Pioneer Southwest"means Pioneer Southwest Energy Partners L.P. and its subsidiaries.

• "proved reserves" means the quantities of oil and gas, which, by analysis of geosciences 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 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 geosciences 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 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 is based; and (B) The project has been approved for development by all necessary parties and entities, including governmental entities.

(v) Existing conditions include prices and costs at which economic producibility from a reservoir is to be determined. The price shall be the average 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.

• "SEC"means the United States Securities and Exchange Commission.

• "Standardized Measure"means the after-tax present value of estimated future net cash flows of proved reserves, determined in accordance with the rules and regulations of the SEC, using prices and costs employed in the determination of proved reserves and a ten percent discount rate.

• "U.S."means United States.

• "VPP"means volumetric production payment.

• With respect to information on the working interest in wells, drilling locations and acreage, "net" wells, drilling locations and acres are determined by multiplying "gross" wells, drilling locations and acres by the Company's working interest in such wells, drilling locations or acres. Unless otherwise specified, wells, drilling locations and acreage statistics quoted herein represent gross wells, drilling locations or acres.

• Unless otherwise indicated, all currency amounts are expressed in U.S. dollars.

4

PART I. FINANCIAL INFORMATION

Item 1.          Financial Statements

PIONEER NATURAL RESOURCES COMPANY

CONSOLIDATED BALANCE SHEETS

(in thousands)

				March 31, 2010		December 31, 2009
				(Unaudited)
ASSETS
Current assets:
	Cash and cash equivalents			$	34,540	$	27,368
	Accounts receivable:
		Trade, net of allowance for doubtful accounts of $1,415 and $1,310 as of
			March 31, 2010 and December 31, 2009, respectively		260,688		330,711
		Due from affiliates			593		1,037
	Income taxes receivable				3,758		25,022
	Inventories				120,750		139,177
	Prepaid expenses				8,551		9,011
	Deferred income taxes				-		26,857
	Other current assets:
		Derivatives			154,732		48,713
		Other, net of allowance for doubtful accounts of $2,137 and $5,689 as of
			March 31, 2010 and December 31, 2009, respectively		3,414		8,222
			Total current assets		587,026		616,118
Property, plant and equipment, at cost:
	Oil and gas properties, using the successful efforts method of accounting:
		Proved properties			10,388,312		10,276,244
		Unproved properties			269,029		236,660
	Accumulated depletion, depreciation and amortization				(3,059,087)		(2,946,048)
			Total property, plant and equipment		7,598,254		7,566,856
Deferred income taxes					491		387
Goodwill					308,831		309,259
Other property and equipment, net					188,504		154,830
Other assets:
	Derivatives				118,318		43,631
	Other, net of allowance for doubtful accounts of $11,177 and $7,300  as of
		March 31, 2010 and December 31, 2009, respectively			171,231		176,184
				$	8,972,655	$	8,867,265

The financial information included as of March 31, 2010 has been prepared by management

without audit by independent registered public accountants.

The accompanying notes are an integral part of these consolidated financial statements.

5

PIONEER NATURAL RESOURCES COMPANY

CONSOLIDATED BALANCE SHEETS (continued)

(in thousands, except share data)

				March 31, 2010		December 31, 2009
				(Unaudited)
LIABILITIES AND STOCKHOLDERS' EQUITY
Current liabilities:
	Accounts payable:
		Trade		$	246,276	$	221,359
		Due to affiliates			13,530		32,224
	Interest payable				33,695		47,009
	Income taxes payable				15,875		17,411
	Deferred income taxes				-		128
	Other current liabilities:
		Derivatives			90,753		116,015
		Deferred revenue			78,816		90,215
		Other			42,742		46,830
			Total current liabilities		521,687		571,191
Long-term debt					2,647,604		2,761,011
Derivatives					76,819		133,645
Deferred income taxes					1,589,275		1,470,899
Deferred revenue					75,937		87,021
Other liabilities					177,705		200,467
Stockholders' equity:
	Common stock, $.01 par value; 500,000,000 shares authorized; 126,055,152 and
		125,203,502 shares issued at March 31, 2010 and December 31, 2009, respectively			1,260		1,252
	Additional paid-in capital				2,997,656		2,981,450
	Treasury stock, at cost: 10,983,758 and 10,828,171 at March 31, 2010
		and December 31, 2009, respectively			(423,978)		(415,211)
	Retained earnings				1,156,578		917,688
	Accumulated other comprehensive income - deferred hedge gains, net of tax				39,450		51,009
			Total stockholders' equity attributable to common stockholders		3,770,966		3,536,188
	Noncontrolling interests in consolidated subsidiaries				112,662		106,843
			Total stockholders' equity		3,883,628		3,643,031
Commitments and contingencies
				$	8,972,655	$	8,867,265

The financial information included as of March 31, 2010 has been prepared by management

without audit by independent registered public accountants.

The accompanying notes are an integral part of these consolidated financial statements.

6

PIONEER NATURAL RESOURCES COMPANY

CONSOLIDATED STATEMENTS OF OPERATIONS

(in thousands, except per share data)

(Unaudited)

		Three Months Ended March 31,
		2010		2009
Revenues and other income:
	Oil and gas	$	507,796	$	367,851
	Interest and other		19,803		10,660
	Derivative gains, net		265,476		99,863
	Gain (loss) on disposition of assets, net		16,943		(115)
	Hurricane activity, net		7,410		(375)
			817,428		477,884
Costs and expenses:
	Oil and gas production		89,715		110,431
	Production and ad valorem taxes		27,061		27,699
	Depletion, depreciation and  amortization		150,768		188,144
	Impairment of oil and gas properties		-		21,091
	Exploration and abandonments		20,797		31,170
	General and administrative		40,948		34,654
	Accretion of discount on asset retirement obligations		2,960		2,752
	Interest		47,523		41,138
	Other		16,576		31,389
			396,348		488,468
Income (loss) from continuing operations before income taxes			421,080		(10,584)
Income tax benefit (provision)			(160,474)		741
Income (loss) from continuing operations			260,606		(9,843)
Loss from discontinued operations, net of tax			-		(970)
Net income (loss)			260,606		(10,813)
	Net income attributable to the noncontrolling interests		(15,352)		(3,793)
Net income (loss) attributable to common stockholders		$	245,254	$	(14,606)
Basic earnings per share:
	Income (loss) from continuing operations attributable to common stockholders	$	2.09	$	(0.12)
	Loss from discontinued operations attributable to common stockholders		-		(0.01)
	Net income (loss) attributable to common stockholders	$	2.09	$	(0.13)
Diluted earnings per share:
	Income (loss) from continuing operations attributable to common stockholders	$	2.08	$	(0.12)
	Loss from discontinued operations attributable to common stockholders		-		(0.01)
	Net income (loss) attributable to common stockholders	$	2.08	$	(0.13)
Weighted average shares outstanding:
	Basic		114,655		114,242
	Diluted		115,462		114,242
Dividends declared per share		$	0.04	$	0.04
Amounts attributable to common stockholders:
	Income (loss) from continuing operations	$	245,254	$	(13,636)
	Loss from discontinued operations		-		(970)
	Net income (loss)	$	245,254	$	(14,606)

The financial information included herein has been prepared by management

without audit by independent registered public accountants.

The accompanying notes are an integral part of these consolidated financial statements.

7

PIONEER NATURAL RESOURCES COMPANY

CONSOLIDATED STATEMENT OF STOCKHOLDERS’ EQUITY

(in thousands, except dividends per share)

(Unaudited)

					Stockholders' Equity Attributable To Common Stockholders
			Shares Outstanding	Common Stock		Additional Paid-in Capital		Treasury Stock		Retained Earnings		Accumulated Other Comprehensive Income		Noncontrolling Interests		Total Stockholders' Equity
Balance as of December 31, 2009			114,375	$	1,252	$	2,981,450	$	(415,211)	$	917,688	$	51,009	$	106,843	$	3,643,031
Dividends declared ($0.04 per share)			-		-		-		-		(4,736)		-		-		(4,736)
Exercise of long-term incentive plan stock   options			110		-		-		4,211		(1,628)		-		-		2,583
Treasury stock purchases to satisfy employee
	tax withholding obligations		(265)		-		-		(12,978)		-		-		-		(12,978)
Tax benefit related to stock-based compensation			-		-		6,705		-		-		-		-		6,705
Compensation costs:
	Vested compensation awards, net		851		8		(8)		-		-		-		-		-
	Compensation costs included in net income		-		-		9,509		-		-		-		253		9,762
Cash contributions from noncontrolling interests			-		-		-		-		-		-		1,151		1,151
Cash distributions to noncontrolling interests			-		-		-		-		-		-		(6,605)		(6,605)
Net income			-		-		-		-		245,254		-		15,352		260,606
Other comprehensive loss:
	Deferred hedging activity, net of tax:
		Net hedge gains included in continuing   operations	-		-		-		-		-		(11,559)		(4,332)		(15,891)
Balance as of March 31, 2010			115,071	$	1,260	$	2,997,656	$	(423,978)	$	1,156,578	$	39,450	$	112,662	$	3,883,628

The financial information included herein has been prepared by management without audit by independent registered public accountants.

The accompanying notes are an integral part of these consolidated financial statements.

8

PIONEER NATURAL RESOURCES COMPANY

CONSOLIDATED STATEMENTS OF CASH FLOWS

(in thousands)

(Unaudited)

						Three Months Ended March 31,
						2010		2009
Cash flows from operating activities:
	Net income (loss)				$	260,606	$	(10,813)
	Adjustments to reconcile net income (loss) to net cash provided by
		operating activities:
			Depletion, depreciation and amortization			150,768		188,144
			Impairment of oil and gas properties			-		21,091
			Exploration expenses, including dry holes			3,566		18,249
			Deferred income taxes			158,456		(10,510)
			(Gain) loss on disposition of assets, net			(16,943)		115
			Accretion of discount on asset retirement obligations			2,960		2,752
			Discontinued operations			-		4,373
			Interest expense			7,408		6,609
			Derivative related activity			(281,871)		(111,285)
			Amortization of stock-based compensation			9,624		9,297
			Amortization of deferred revenue			(22,483)		(36,720)
			Other noncash items			(2,176)		10,694
	Change in operating assets and liabilities
			Accounts receivable, net			48,080		42,221
			Income taxes receivable			21,264		44,936
			Inventories			17,429		(34,470)
			Prepaid expenses			435		1,960
			Other current assets			1,226		26,057
			Accounts payable			(34,296)		(111,450)
			Interest payable			(13,314)		(15,576)
			Income taxes payable			(1,536)		8,541
			Other current liabilities			(9,840)		(29,794)
				Net cash provided by operating activities		299,363		24,421
Cash flows from investing activities:
	Proceeds from disposition of assets					34,985		200
	Additions to oil and gas properties					(156,529)		(164,527)
	Additions to other assets and other property and equipment, net					(44,999)		(6,736)
				Net cash used in investing activities		(166,543)		(171,063)
Cash flows from financing activities:
	Borrowings under long-term debt					87,154		172,000
	Principal payments on long-term debt					(206,264)		(1,000)
	Contributions from noncontrolling interests					1,151		150
	Distributions to noncontrolling interests					(6,605)		(4,990)
	Borrowings (payments) of other liabilities					2,818		(335)
	Exercise of long-term incentive plan stock options					2,583		954
	Purchases of treasury stock					(12,978)		(20,119)
	Excess tax (provisions) benefits from share-based payment arrangements					6,705		(3,879)
	Payment of financing fees					(147)		-
	Dividends paid					(65)		-
				Net cash provided by (used in) financing activities		(125,648)		142,781
Net increase (decrease) in cash and cash equivalents						7,172		(3,861)
Cash and cash equivalents, beginning of period						27,368		48,337
Cash and cash equivalents, end of period					$	34,540	$	44,476

The financial information included herein has been prepared by management

without audit by independent registered public accountants.

The accompanying notes are an integral part of these consolidated financial statements.

9

PIONEER NATURAL RESOURCES COMPANY

CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (LOSS)

(in thousands)

(Unaudited)

			Three Months Ended March 31,
			2010		2009
Net income (loss)			$	260,606	$	(10,813)
Other comprehensive loss:
	Hedge fair value changes, net			-		12,974
	Net hedge gains included in continuing operations			(20,926)		(39,168)
	Income tax provision			5,035		9,534
		Other comprehensive loss		(15,891)		(16,660)
Comprehensive income (loss)				244,715		(27,473)
	Comprehensive income attributable to noncontrolling interest			(11,036)		(1,788)
Comprehensive income (loss) attributable to common stockholders			$	233,679	$	(29,261)

The financial information included herein has been prepared by management

without audit by independent registered public accountants.

The accompanying notes are an integral part of these consolidated financial statements.

10

PIONEER NATURAL RESOURCES COMPANY

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS

March 31, 2010

(Unaudited)

NOTE A.           Organization and Nature of Operations

Pioneer Natural Resources Company ("Pioneer" or the "Company") is a Delaware corporation whose common stock is listed and traded on the New York Stock Exchange.  The Company is a large independent oil and gas exploration and production company with continuing operations in the United States, South Africa and Tunisia.

NOTE B.           Basis of Presentation

Presentation. In the opinion of management, the consolidated financial statements of the Company as of March 31, 2010 and for the three months ended March 31, 2010 and 2009 include all adjustments and accruals, consisting only of normal recurring accrual adjustments, which are necessary for a fair presentation of the results for the interim periods.  These interim results are not necessarily indicative of results for a full year.

Certain information and footnote disclosures normally included in financial statements prepared in accordance with generally accepted accounting principles in the United States ("GAAP") have been condensed or omitted in this Report pursuant to the rules and regulations of the SEC.  These consolidated financial statements should be read in connection with the consolidated financial statements and notes thereto included in the Company's Annual Report on Form 10-K for the year ended December 31, 2009.

Discontinued operations. During June and August 2009, the Company sold substantially all of its Mississippi assets and shelf properties in the Gulf of Mexico, respectively. Accordingly, the Company has recast its accompanying consolidated statements of operations and cash flows for the three months ended March 31, 2009 to reflect the results of operations of both of these asset groups as discontinued operations, rather than as components of continuing operations.

Allowances for doubtful accounts.  As of March 31, 2010 and December 31, 2009, the Company's allowances for doubtful accounts totaled $14.7 million and $14.3 million, respectively. Changes in the Company’s allowance for doubtful accounts during the three months ended March 31, 2010 are summarized in the following table:

		Three Months Ended March 31, 2010
Beginning allowance for doubtful accounts balance		$	14,299
	Amount recorded in other expense for bad debt expense		224
	Other net increases		206
Ending allowance for doubtful accounts balance		$	14,729

Inventories.  Inventories consisted of $187.0 million and $205.6 million of materials and supplies and $4.0 million and $3.2 million of commodities as of March 31, 2010 and December 31, 2009, respectively.  As of March 31, 2010 and December 31, 2009, the Company's materials and supplies inventory was net of $1.6 million and $5.2 million, respectively, of valuation reserve allowances. As of March 31, 2010 and December 31, 2009, the Company estimated that $70.2 million and $69.6 million, respectively, of its materials and supplies inventory would not be utilized within one year. Accordingly, those inventory values have been classified as other noncurrent assets in the accompanying consolidated balance sheets.

Derivatives and hedging. Changes in the fair values of derivative instruments are recognized as gains or losses in the earnings of the period in which they occur. Effective February 1, 2009, the Company discontinued hedge accounting on all of its then-existing hedge contracts. Changes in the fair value of effective cash flow hedges prior to the Company’s discontinuance of hedge accounting on February 1, 2009 were recorded as a component of accumulated other comprehensive income – deferred hedge gains, net of tax ("AOCI – Hedging"), in the stockholders' equity section of the accompanying consolidated balance sheets, and are being transferred to earnings during the same periods in which the hedged transactions are recognized in the Company 's earnings. Since February 1, 2009, the Company has recognized all changes in the fair values of its derivative contracts as gains or losses in the earnings of the periods in which they occur.

11

PIONEER NATURAL RESOURCES COMPANY

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS

March 31, 2010

(Unaudited)

The Company classifies the fair value amounts of derivative assets and liabilities executed under master netting arrangements as net current or noncurrent derivative assets or net current or noncurrent derivative liabilities, whichever the case may be, by commodity and master netting counterparty. Net derivative asset values are determined, in part, by utilization of the derivative counterparties' credit-adjusted risk-free rate curves and net derivative liabilities are determined, in part, by utilization of the Company's and Pioneer Southwest Energy Partners L.P.’s ("Pioneer Southwest," a majority-owned and consolidated subsidiary) credit-adjusted risk-free rate curves. The credit-adjusted risk-free rates are based on an independent market-quoted credit default swap rate curve for the Company's or the counterparties' debt plus t he United States Treasury Bill yield curve as of March 31, 2010.  Pioneer Southwest’s credit-adjusted risk-free rate curve is based on independent market-quoted forward London Interbank Offered Rate ("LIBOR") curves plus 250 basis points, representing Pioneer Southwest’s estimated borrowing rate.

Goodwill. Goodwill is assessed for impairment whenever events or circumstances indicate that impairment of the carrying value of goodwill is likely, but no less often than annually. If the carrying value of goodwill is determined to be impaired, it is reduced for the impaired value with a corresponding charge to pretax earnings in the period in which it is determined to be impaired. During the third quarter of 2009, the Company performed its annual assessment of goodwill impairment and determined that there was no impairment. During March 2010, the Company sold a portion of its oil and gas properties in the Uinta/Piceance area for $8.2 million of net proceeds, including customary closing adjustments. Associated therewith, the Company reduced its goodwill attri butable to the Uinta/Piceance properties by $414 thousand.

Noncontrolling interest in consolidated subsidiaries. The Company owns a 0.1 percent general partner interest and a 61.9 percent limited partner interest in Pioneer Southwest. Pioneer Southwest owns interests in certain oil and gas properties previously owned by the Company in the Spraberry field in the Permian Basin of West Texas. The financial position, results of operations, and cash flows of Pioneer Southwest are consolidated with those of the Company.

In addition to Pioneer Southwest, the Company owns the majority interests in certain other subsidiaries with operations in the United States.  Noncontrolling interest in the net assets of consolidated subsidiaries totaled $112.7 million and $106.8 million as of March 31, 2010 and December 31, 2009, respectively.  The Company recorded net income attributable to the noncontrolling interests of $15.4 million for the three months ended March 31, 2010, (principally related to Pioneer Southwest) compared to $3.8 million for the three months ended March 31, 2009, respectively.

Stock-based compensation.  For stock-based compensation equity awards, compensation expense is being recognized in the Company's financial statements on a straight line basis over the awards' vesting periods based on their fair values on the dates of grant. The Company utilizes (i) the Black-Scholes option pricing model to measure the fair value of stock options, (ii) the prior day's closing stock price on the date of grant for the fair value of restricted stock awards, (iii) the Monte Carlo simulation method for the fair value of performance unit awards and (iv) a probabilistic forecasted fair value method for series B unit awards in the Company’s majority-owned drilling subsidiary, Sendero Drilling Company, LLC ("Sendero").

Stock-based compensation liability awards are awards that are expected to be settled wholly or partially in cash on their vesting dates, rather than in equity shares or units.  Stock-based liability awards are recorded as accounts payable - affiliates based on the vested portion of the fair value of the awards on the balance sheet date.  The fair values of liability awards are updated at each balance sheet date and changes in the periodic fair values of the vested portions of the awards are recorded as increases or decreases to compensation expense in the periods of change.  During February 2010, the Company issued 208,620 restricted stock awards to employees that represent liability awards.  As of March 31, 2010, accounts payable – affiliates includes $326 thousand of liabilities attribut able to the liability awards.

For the three months ended March 31, 2010, the Company recorded $9.8 million of stock-based compensation costs for all plans, as compared to $9.3 million for the same period of 2009.

In accordance with GAAP, the Company's issued shares, as reflected in the consolidated balance sheets at March 31, 2010 and December 31, 2009, do not include 846,312 and 979,493 common shares, respectively, associated with unvested stock-based compensation awards that have voting rights.

12

PIONEER NATURAL RESOURCES COMPANY

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS

March 31, 2010

(Unaudited)

The following table summarizes all Pioneer equity and liability stock-based awards, lapses and forfeitures that occurred during the three months ended March 31, 2010:

	Restricted Stock Awards	Performance Units	Stock Options
Awards (a)	678,977	74,482	116,120
Lapsed restrictions	756,890	137,659	-
Exercises	-	-	109,595
Forfeitures	27,600	-	1,066

______

(a)   Restricted stock awards include 208,620 of liability awards.

Subsidiary issuances of unit-based compensation.  During the three months ended March 31, 2010, Pioneer Natural Resources GP LLC (the “General Partner”), the general partner of Pioneer Southwest, awarded phantom units to certain members of management of the General Partner under Pioneer Southwest’s long-term incentive plan (the "Phantom Units").  The Phantom Units entitle the recipients to 35,118 common units of Pioneer Southwest after a three-year vesting period.  Associated therewith, Pioneer Southwest and the Company recorded $22 thousand of compensation expense during the three months ended March 31, 2010.  During the three months ended March 31, 2010, Sendero entered into Restricted Unit Agreements with two key emplo yees, relating to series B units in Sendero.  The series B unit awards vest over a five-year period and do not earn equity rights unless certain defined performance conditions are achieved by Sendero.  Associated therewith, the Company recorded $184 thousand of compensation expense during the three months ended March 31, 2010.

As of March 31, 2010, there was $79.1 million of unrecognized compensation expense related to unvested share- and unit-based compensation plan awards, including $11.4 million attributable to liability awards. This compensation will be recognized over the remaining vesting periods of the awards, which on a weighted average basis is a period of less than three years.

New accounting pronouncements. During February 2010, the Financial Accounting Standards Board ("FASB") issued Accounting Standards Update ("ASU") No. 2010-09, "Subsequent Events (Topic 855)". ASU No. 2010-09 amends Accounting Standards Codification ("ASC") Topic 855 to include the definition of "SEC filer" and alleviate the obligation of SEC filers to disclose the date through which subsequent events have been evaluated. ASU No. 2010-09 became effective during February 2010.  See Note S for the Company's disclosures of subsequent events.

Fair value measurements and disclosures. During January 2010, the FASB issued ASU No. 2010-06, "Fair Value Measurements and Disclosures (Topic 820)".  ASU No. 2010-06 amends ASC Topic 820 to (i) require separate disclosure of significant transfers in and out of Level 1 and Level 2 fair value measurements and the reasons for the transfers, (ii) require separate disclosure of purchases, sales, issuances and settlements in the reconciliation for fair value measurements using significant unobservable inputs (Level 3), (iii) clarify the level of disaggregation for fair value measurements of assets and liabilities and (iv) clarify disclosures about inputs and valuation techniques used to measure fair values for both recurring and nonrecurring fair value me asurements.  ASU No. 2010-06 is effective for interim and annual reporting periods beginning after December 15, 2009, except for the disclosures about purchases, sales, issuances and settlements in the rollforward of activity in Level 3 fair value measurements.  Those disclosures are effective for fiscal years beginning after December 15, 2010 and for interim periods within those fiscal years.  The Company adopted the provisions of ASU No. 2010-06 on January 1, 2010.  See Note D for the Company's disclosures about fair value measurements.

NOTE C.           Exploratory Well Costs

The Company capitalizes exploratory well costs until a determination is made that the well has either found proved reserves or that it is impaired. The capitalized exploratory well costs are presented in proved properties in the consolidated balance sheets. If the exploratory well is determined to be impaired, the well costs are charged to exploration and abandonments expense.

13

PIONEER NATURAL RESOURCES COMPANY

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS

March 31, 2010

(Unaudited)

The following table reflects the Company's capitalized exploratory well activity during the three months ended March 31, 2010:

			Three Months Ended March 31, 2010
Beginning capitalized exploratory well costs			$	127,574
	Additions to exploratory well costs pending the
		determination of proved reserves		38,122
	Reclassification due to determination of proved reserves			(28,245)
	Exploratory well costs charged to exploration expense			130
Ending capitalized exploratory well costs			$	137,581

The following table provides an aging, as of March 31, 2010 and December 31, 2009 of capitalized exploratory well costs and the number of projects for which exploratory well costs have been capitalized for a period greater than one year, based on the date drilling was completed:

		March 31, 2010		December 31, 2009
		(in thousands, except well counts)
Capitalized exploratory well costs that have been suspended:
	One year or less	$	22,848	$	21,634
	More than one year		114,733		105,940
		$	137,581	$	127,574
Number of projects with exploratory well costs that have
	been suspended for a period greater than one year		8		8

The following table provides an aging of capitalized costs of exploration projects that have been suspended for more than one year as of March 31, 2010:

		Total		2010		2009		2008		2007		2006
		(in thousands)
United States:
Cosmopolitan Unit		$	75,219	$	8,305	$	8,253	$	6,344	$	51,488	$	829
Other			5,918		294		797		4,827		-		-
Tunisia			33,596		194		466		29,006		(15)		3,945
	Total	$	114,733	$	8,793	$	9,516	$	40,177	$	51,473	$	4,774

Cosmopolitan Unit. The Company owns a 100 percent working interest in, and is the operator of, the Cosmopolitan Unit in the Cook Inlet of Alaska. During 2007, the Company drilled the Hansen #1A L1 well, a lateral sidetrack from an existing wellbore, to appraise the resource potential of the unit. The initial unstimulated production test results were encouraging. As a result, the Company began project permitting and facilities planning during 2008. During 2009, the Company continued progress on engineering studies and commenced a workover of the Hansen #1A-L1 well.  During the three months ended March 31, 2010, the Company completed the Hansen #1A-L1 workover, fracture-stimulated the well and began flow testing the well.  During 2010, the Company plans to evalu ate the production flow rate information from the Hansen #1A-L1 well, progress project permitting and develop plans for a second well to further delineate the extent of the unit's resource potential.

14

PIONEER NATURAL RESOURCES COMPANY

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS

March 31, 2010

(Unaudited)

Tunisia – Cherouq. The Company has $17.8 million of suspended well costs recorded for the Hayatt #1 well in the Company’s Cherouq production concession area, which is operated by the Company. The Hayatt #1 well began drilling in April 2008 to test several targeted formations. Mechanical failures were encountered during the testing of the well that did not allow completion of the formation assessments. The Company has project personnel at appropriate levels committed to and actively participating in analyzing seismic and other data to determine the optimal plan forward for completing the well, which may utilize the existing wellbore or a new wellbore adjacent to the existing well. The Company expects to finalize its Hayatt #1 plans during 2010 or early 2011 and execute well completion plans during 2011.

Tunisia – Borj El Khadra. The Company has $7.7 million of suspended well costs attributable to the Nahkil #1 and Abir #1 wells in the Borj El Khadra exploration permit area, which is operated by a third-party. The Nahkil #1 well encountered oil-bearing sands and the Abir #1 well encountered gas-bearing sands. The Company does not record proved reserves associated with discoveries in exploration permit areas until a production concession is granted. The third-party operator and the Company have project personnel at appropriate levels committed to and actively participating in infrastructure planning and assessment of the permit area.  During the first quarter of 2010, a $13.8 million 3-D seismic program was initiated and plans include the drilling of an additional exploration well in the permit area during 2010.  Additionally, project personnel are evaluating the feasibility of using production handling facilities on a nearby production concession to transport Abir #1 production to sales markets.

Tunisia – Anaguid. The Company has $8.1 million of suspended well costs attributable to the Durra #1 well on the Anaguid exploration permit. Project personnel at appropriate levels are committed to and actively participating in the assessment of the Durra #1 well and the Anaguid exploration permit area.  During April 2010, the Company and other project participants formally submitted a plan of development for the conversion of the Durra #1 discovery into a concession agreement. Development activities are being formulated to commence production and drilling activities if the plan of development is approved.

NOTE D.          Disclosures About Fair Value Measurements

In accordance with GAAP, fair value measurements are based upon inputs that market participants use in pricing an asset or liability, which are classified into two categories: observable inputs and unobservable inputs. Observable inputs represent market data obtained from independent sources, whereas unobservable inputs reflect a company’s own market assumptions, which are used if observable inputs are not reasonably available without undue cost and effort. These two types of inputs are further prioritized into the following fair value input hierarchy:

• Level 1 – quoted prices for identical assets or liabilities in active markets.

• Level 2 – quoted prices for similar assets or liabilities in active markets, quoted prices for identical or similar assets or liabilities in markets that are not active, inputs other than quoted prices that are observable for the asset or liability (e.g., interest rates) and inputs derived principally from or corroborated by observable market data by correlation or other means.

• Level 3 – unobservable inputs for the asset or liability.

The fair value input hierarchy level to which an asset or liability measurement in its entirety falls is determined based on the lowest level input that is significant to the measurement in its entirety.

15

PIONEER NATURAL RESOURCES COMPANY

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS

March 31, 2010

(Unaudited)

The following table presents the Company's assets and liabilities that are measured at fair value on a recurring basis as of March 31, 2010, for each of the fair value hierarchy levels:

			Fair Value Measurements at Reporting Date Using
			Quoted Prices in Active Markets for Identical Assets (Level 1)		Significant Other Observable Inputs (Level 2)		Significant Unobservable Inputs (Level 3)		Fair Value at March 31, 2010
			(in thousands)
Assets:
	Trading securities		$	268	$	106	$	-	$	374
	Commodity derivatives			-		258,684		3,962		262,646
	Interest rate derivatives			-		10,404		-		10,404
	Deferred compensation plan assets			29,854		-		-		29,854
	Notes receivable			-		-		1,529		1,529
		Total assets	$	30,122	$	269,194	$	5,491	$	304,807
Liabilities:
	Commodity derivatives		$	-	$	144,449	$	5,285	$	149,734
	Interest rate derivatives			-		17,838		-		17,838
	Pioneer credit facility			-		141,638		-		141,638
	Pioneer Southwest credit facility			-		64,142		-		64,142
	5.875% senior notes due 2016			447,416		-		-		447,416
	6.65% senior notes due 2017			485,100		-		-		485,100
	6.875% senior notes due 2018			450,624		-		-		450,624
	7.50% senior notes due 2020			459,000		-		-		459,000
	7.20% senior notes due 2028			232,650		-		-		232,650
	2.875% senior convertible notes due 2038 (a)			551,256		-		-		551,256
		Total liabilities	$	2,626,046	$	368,067	$	5,285	$	2,999,398

__________

(a) The fair value of the 2.875% senior convertible notes includes the fair value of the conversion privilege. At the issuance date, the conversion privilege was valued at $81.1 million.

The following table presents the changes in the fair values of the Company's notes receivable and natural gas liquid ("NGL") derivative liabilities classified as Level 3 in the fair value hierarchy:

Fair Value Measurements Using Significant Unobservable Inputs (Level 3)		Three Months Ended March 31, 2010
		NGL Swap Contracts		Notes Receivable		Total
		(in thousands)
Beginning balance		$	(12,904)	$	4,727	$	(8,177)
Total gains (losses):
	Net unrealized gains included in earnings (a)		13,421		-		13,421
	Net realized losses transferred to earnings (a)		(3,080)		-		(3,080)
	Notes receivable valuation allowance included in earnings (b)		-		(120)		(120)
Settlements (c)			1,240		(3,078)		(1,838)
Ending balance		$	(1,323)	$	1,529	$	206

__________

(a)	The hedge-effective portions of realized gains and losses on commodity derivatives in AOCI – Hedging are included in oil and gas revenues, while non-hedge derivatives or ineffective portions of realized and unrealized hedge gains and losses are included in derivative gains, net in the accompanying consolidated statements of operations.
(b)	The valuation allowance associated with the Company's notes receivable is included in other expense in the accompanying consolidated statements of operations.

16

PIONEER NATURAL RESOURCES COMPANY

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS

March 31, 2010

(Unaudited)

(c) During the first quarter of 2010, the Company took possession of the drilling rig that represented $3.0 million of collateral value associated with its notes receivable.

The following table presents the carrying amounts and fair values of the Company's financial instruments as of March 31, 2010 and December 31, 2009:

		March 31, 2010				December 31, 2009
		Carrying		Fair		Carrying		Fair
		Value		Value		Value		Value
		(in thousands)
Assets:
	Commodity price derivatives	$	262,646	$	262,646	$	84,080	$	84,080
	Interest rate derivatives	$	10,404	$	10,404	$	8,264	$	8,264
	Trading securities	$	374	$	374	$	335	$	335
	Deferred compensation plan assets	$	29,854	$	29,854	$	27,890	$	27,890
	Notes receivable	$	1,529	$	1,529	$	4,727	$	4,727
Liabilities:
	Commodity price derivatives	$	149,734	$	149,734	$	223,555	$	223,555
	Interest rate derivatives	$	17,838	$	17,838	$	26,105	$	26,105
	Pioneer credit facility	$	125,000	$	141,638	$	240,000	$	259,461
	Pioneer Southwest credit facility	$	69,000	$	64,142	$	67,000	$	61,718
	5.875 % senior notes due 2012	$	-	$	-	$	6,168	$	6,154
	5.875 % senior notes due 2016	$	390,986	$	447,416	$	389,109	$	437,170
	6.65 % senior notes due 2017	$	483,946	$	485,100	$	483,914	$	472,546
	6.875 % senior notes due 2018	$	449,169	$	450,624	$	449,161	$	438,402
	7.50 % senior notes due 2020	$	446,236	$	459,000	$	446,172	$	449,566
	7.20 % senior notes due 2028	$	249,924	$	232,650	$	249,924	$	230,868
	2.875% senior convertible notes due 2038 (a)	$	433,343	$	551,256	$	429,563	$	508,320

__________

(a) The fair value of the 2.875% senior convertible notes includes the fair value of the conversion privilege. At the issuance date, the conversion privilege was valued at $81.1 million.

Trading securities and deferred compensation plan assets.  The Company's trading securities represent equity securities that are not actively traded on major exchanges and trading securities that are actively traded on major exchanges. The Company's deferred compensation plan assets represent investments in equity and mutual fund securities that are actively traded on major exchanges plus unallocated contributions as of the measurement date. As of March 31, 2010, all significant inputs to these asset exchange values represented Level 1 independent active exchange market price inputs except inputs for trading securities that are not actively traded on major exchanges, which were provided by broker quotes representing Level 2 inputs.

Notes receivable. The fair value of the Company's notes receivable approximates the carrying values based on the adequacy of the collateral security and interest yields.  The balance of the Company's notes receivable is included in other current assets in the accompanying consolidated balance sheets.

Interest rate derivatives.  The Company’s interest rate derivative assets and liabilities as of March 31, 2010 represent (i) swap contracts for $189 million notional amount of debt, whereby the Company pays a fixed rate of interest and the counterparty pays a variable LIBOR-based rate and (ii) swap contracts for $460 million notional amount of debt, whereby the Company pays a variable LIBOR-based rate and the counterparty pays a fixed rate of interest. The net derivative liability values attributable to the Company’s interest rate derivative contracts as of March 31, 2010 are based on (i) the contracted notional amounts, (ii) LIBOR rate yield curves provided by counterparties and corroborated with forward active market - -quoted LIBOR rate yield curves and (iii) the applicable credit-adjusted risk-free rate yield curve. The Company’s interest rate derivative asset and liability measurements represent Level 2 inputs in the hierarchy priority.

17

PIONEER NATURAL RESOURCES COMPANY

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS

March 31, 2010

(Unaudited)

Commodity derivatives.  The Company's commodity derivatives represent oil, NGL and gas swap contracts, collar contracts and collar contracts with short puts (which are also known as three-way collar contracts). The Company's oil and gas swap, collar and three-way collar derivative contract asset and liability measurements represent Level 2 inputs in the hierarchy priority while NGL derivative contract asset and liability measurements represent Level 3 inputs in the hierarchy priority.

Oil derivatives. The Company's oil derivatives are swap, collar and three-way collar contracts for notional barrels ("Bbls") of oil at fixed (in the case of swap contracts) or interval (in the case of collar and three-way collar contracts) New York Mercantile Exchange ("NYMEX") West Texas Intermediate ("WTI") oil prices. The asset and liability values attributable to the Company's oil derivatives as of March 31, 2010 are based on (i) the contracted notional volumes, (ii) independent active NYMEX futures price quotes for WTI oil, (iii) the applicable estimated credit-adjusted risk-free rate yield curve and (iv) the implied rate of volatility inherent in the collar and three-way collar contracts. The implied rates of volatility inherent in the Company's collar contracts were determined based on average volatility factors provided by certain independent brokers who are active in buying and selling oil options and were corroborated by market-quoted volatility factors.

NGL derivatives. The Company's NGL derivatives include swap and collar contracts for notional blended Bbls of Mont Belvieu-posted-price NGLs or NGL component prices per Bbl. The Company has also entered into NGL swaps under terms whereby the Company pays variable NGL component market prices and receives a percentage of NYMEX WTI market prices ("NGL Percentage of WTI Oil Prices").  The NGL Percentage of WTI Oil Prices contracts provide greater correlation between changes in certain components of the NGL stream and NYMEX WTI oil prices, including the effects of the derivatives. The asset and liability values attributable to the Company's NGL derivatives as of March 31, 2010 are based on (i) the contracted notional volumes, (ii) average forward Mont Belvieu-post ed-price quotes and NGL component price quotes supplied by independent brokers who are active in buying and selling NGL derivative contracts, (iii) independent active NYMEX futures price quotes for WTI oil and (iv) the applicable credit-adjusted risk-free rate yield curve. The implied rates of volatility inherent in the Company’s collar contracts were determined based on average volatility factors provided by certain independent brokers who are active in buying and selling NGL options.

Gas derivatives. The Company's gas derivatives are swap, collar and three-way collar contracts for notional MMBtus of gas contracted at various posted price indexes, including NYMEX Henry Hub ("HH") swap contracts coupled with basis swap contracts that convert the HH price index point to other price indexes. The asset and liability values attributable to the Company's gas derivative contracts as of March 31, 2010 are based on (i) the contracted notional volumes, (ii) independent active NYMEX futures price quotes for HH gas, (iii) averages of forward posted price quotes supplied by independent brokers who are active in buying and selling gas derivatives at the indexes other than HH, which were corroborated by market-quoted forward index prices, (iv) the applic able credit-adjusted risk-free rate yield curve and (v) the implied rate of volatility inherent in the collar and three-way collar contracts. The implied rates of volatility inherent in the Company's collar contracts and three-way collar contracts were determined based on average volatility factor quotes provided by independent brokers who are active buying and selling gas options and corroborated by market-quoted volatility quotes.

Credit facilities. The fair value of each credit facility is based on (i) contractual interest and fees, (ii) forward active market-quoted LIBOR rate yield curves and (iii) the applicable credit-adjusted risk-free rate yield curve.

Senior notes. The Company's senior notes represent debt securities that are actively traded on major exchanges.

NOTE E. Income Taxes

The Company accounts for income taxes in accordance with the provisions of ASC Topic 740, which requires that the Company continually assess both positive and negative evidence to determine whether it is more likely than not that deferred tax assets can be realized prior to their expiration. Pioneer monitors Company-specific, oil and gas industry and worldwide economic factors to assess the likelihood that the Company's net operating loss carryforwards ("NOLs") and other deferred tax attributes in the U.S., state, local and foreign tax jurisdictions will be utilized prior to their expiration. As of March 31, 2010 and December 31, 2009, the Company's valuation allowances (relating primarily to foreign tax jurisdictions) were $44.3 million and $44.2 million, respectively.

18

PIONEER NATURAL RESOURCES COMPANY

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS

March 31, 2010

(Unaudited)

ASC 740 also clarifies the accounting for uncertainty in income taxes recognized and prescribes a recognition threshold and measurement methodology for the financial statement recognition and measurement of a tax position taken or expected to be taken in a tax return. As of March 31, 2010, the Company had no significant unrecognized tax benefits. The Company’s policy is to account for interest charges with respect to income taxes as interest expense and any penalties, with respect to income taxes, as other expense in the consolidated statements of operations. The Company files income tax returns in the U.S. federal and various state and foreign jurisdictions. With few exceptions, the Company believes that it is no longer subject to examinations by tax authorities for years before 2004. As of March 31, 2010, no adjustments had be en proposed in any jurisdiction that would have a significant effect on the Company's liquidity, future results of operations or financial position.

Income tax (provisions) benefits. The Company's income tax (provisions) benefits attributable to income from continuing operations consisted of the following for the three months ended March 31, 2010 and 2009:

		Three Months Ended March 31,
		2010		2009
			(in thousands)
Current:
	U.S. federal	$	(1,101)	$	1,070
	U.S. state		(1,324)		(677)
	Foreign		407		(10,162)
			(2,018)		(9,769)
Deferred:
	U.S. federal		(131,058)		3,008
	U.S. state		(9,460)		243
	Foreign		(17,938)		7,259
			(158,456)		10,510
Income tax (provision) benefit		$	(160,474)	$	741

NOTE F.          Long-term Debt

Senior notes redemption.  On March 15, 2010, the Company redeemed for cash all of its outstanding 5.875% senior notes due 2012 for $6.3 million, which represented the outstanding principal plus accrued and unpaid interest.

As of March 31, 2010, the Company and Pioneer Southwest were in compliance with all of their debt covenants.

NOTE G.         Derivative Financial Instruments

The Company uses financial derivative contracts to manage exposures to commodity price, interest rate and foreign currency exchange rate fluctuations. The Company generally does not enter into derivative financial instruments for speculative or trading purposes. The Company also may enter physical delivery contracts to effectively provide commodity price protection. Because these contracts are not expected to be net cash settled, they are considered to be normal sales contracts and not derivatives. Therefore, physical delivery contracts are not accounted for as derivative financial instruments in the financial statements.

All derivatives are recorded on the balance sheet at estimated fair value. Fair value is generally determined based on the credit-adjusted present value difference between the fixed contract price and the underlying market price at the determination date. The Company accounts for derivative instruments using the mark-to-market accounting method. The Company recognizes all future changes in the fair values of its derivative contracts as gains or losses in the earnings of the period in which they occur.

Changes in the fair value of effective cash flow hedges prior to the Company's discontinuance of hedge accounting on February 1, 2009 were recorded as a component of AOCI – Hedging, which has been or will be

19

PIONEER NATURAL RESOURCES COMPANY

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS

March 31, 2010

(Unaudited)

transferred to earnings when the hedged transaction is recognized in earnings. Any ineffective portion of changes in the fair value of hedge derivatives prior to February 1, 2009 was recorded in the earnings of the period of change. The ineffective portion was calculated as the difference between the change in fair value of the hedge derivative and the estimated change in cash flows from the item hedged.

Fair value derivatives. The Company monitors the debt capital markets and interest rate trends to identify opportunities to enter into and terminate interest rate derivative contracts, with the objective of reducing the Company's costs of capital. As of March 31, 2010 and December 31, 2009, the Company was not a party to any fair value hedges.

Cash flow derivatives. The Company utilizes commodity swap contracts, collar contracts, collar contracts with short puts and NGL Percentage Contracts of WTI Oil Prices to (i) reduce the effect of price volatility on the commodities the Company produces and sells, (ii) support the Company's annual capital budgeting and expenditure plans and (iii) reduce commodity price risk associated with certain capital projects. The Company also, from time to time, utilizes interest rate contracts to reduce the effect of interest rate volatility on the Company's indebtedness and forward currency exchange rate agreements to reduce the effect of exchange rate volatility.

Oil prices. All material physical sales contracts governing the Company's oil production have been tied directly or indirectly to NYMEX oil prices. The following table sets forth as of March 31, 2010 the volumes in Bbls underlying the Company's outstanding oil derivative contracts and the weighted average NYMEX prices per Bbl for those contracts:

			First		Second		Third		Fourth		Outstanding
			Quarter		Quarter		Quarter		Quarter		Average
Average daily oil production derivatives (a):
	2010 – Swap contracts
		Volume (Bbl)				2,500		2,500		2,500		2,500
		Price per Bbl			$	93.34	$	93.34	$	93.34	$	93.34
	2010 – Collar contracts with short puts
		Volume (Bbl)				27,000		27,000		27,250		27,084
		Price per Bbl:
		Ceiling			$	83.82	$	83.82	$	83.94	$	83.86
		Floor			$	66.89	$	66.89	$	66.92	$	66.90
		Short put			$	53.96	$	53.96	$	53.97	$	53.97
	2011 – Swap contracts
		Volume (Bbl)		750		750		750		750		750
		Price per Bbl	$	77.25	$	77.25	$	77.25	$	77.25	$	77.25
	2011 – Collar contracts
		Volume (Bbl)		2,000		2,000		2,000		2,000		2,000
		Price per Bbl:
		Ceiling	$	170.00	$	170.00	$	170.00	$	170.00	$	170.00
		Floor	$	115.00	$	115.00	$	115.00	$	115.00	$	115.00
	2011 – Collar contracts with short puts
		Volume (Bbl)		37,000		37,000		37,000		37,000		37,000
		Price per Bbl:
		Ceiling	$	99.22	$	99.22	$	99.22	$	99.22	$	99.22
		Floor	$	73.92	$	73.92	$	73.92	$	73.92	$	73.92
		Short put	$	59.41	$	59.41	$	59.41	$	59.41	$	59.41
	2012 – Swap contracts
		Volume (Bbl)		3,000		3,000		3,000		3,000		3,000
		Price per Bbl	$	79.32	$	79.32	$	79.32	$	79.32	$	79.32

20

PIONEER NATURAL RESOURCES COMPANY

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS

March 31, 2010

(Unaudited)

2012 – Collar contracts with short puts
	Volume (Bbl)		15,000		15,000		15,000		15,000		15,000
	Price per Bbl:
	Ceiling	$	118.58	$	118.58	$	118.58	$	118.58	$	118.58
	Floor	$	81.00	$	81.00	$	81.00	$	81.00	$	81.00
	Short put	$	65.00	$	65.00	$	65.00	$	65.00	$	65.00
2013 – Swap contracts
	Volume (Bbl)		3,000		3,000		3,000		3,000		3,000
	Price per Bbl	$	81.02	$	81.02	$	81.02	$	81.02	$	81.02
2013 – Collar contracts with short puts
	Volume (Bbl)		1,250		1,250		1,250		1,250		1,250
	Price per Bbl:
	Ceiling	$	111.50	$	111.50	$	111.50	$	111.50	$	111.50
	Floor	$	83.00	$	83.00	$	83.00	$	83.00	$	83.00
	Short put	$	68.00	$	68.00	$	68.00	$	68.00	$	68.00

_____________

(a) Subsequent to March 31, 2010, the Company entered into collar contracts with short puts for (i) approximately 3,000 Bbls per day of the Company's remaining 2010 production with a ceiling price of $95.50 per Bbl, a floor price of $81.67 per Bbl and a short put price of $66.67 per Bbl and (ii) 12,000 Bbls per day of the Company's 2012 production with a ceiling price of $122.25 per Bbl, a floor price of $80.00 per Bbl and a short put price of $65.00 per Bbl.

Natural gas liquids prices.  All material physical sales contracts governing the Company's NGL production have been tied directly or indirectly to Mont Belvieu or NGL product component prices.  Historically, NGL market prices have correlated well with WTI oil prices.  The Company has entered into a limited number of NGL Percentage of WTI Oil Prices derivatives to reduce the risk of volatility in NGL to WTI price differentials.  The following table sets forth as of March 31, 2010 the volumes in Bbls under outstanding NGL derivative contracts and the weighted average Mont Belvieu-posted-prices or NGL component index prices per Bbl for those contracts:

				First		Second		Third		Fourth		Outstanding
				Quarter		Quarter		Quarter		Quarter		Average
Average daily NGL production derivatives (a):
	2010 – Swap contracts
		Volume (Bbl)					1,900		1,250		1,250		1,450
		Price per Bbl				$	48.17	$	47.38	$	47.38	$	47.73
	2010 – Collar contracts
		Volume (Bbl)					2,000		2,000		2,000		2,000
		Price per Bbl:
			Ceiling			$	49.98	$	49.98	$	49.98	$	49.98
			Floor			$	41.58	$	41.58	$	41.58	$	41.58
	2010 – Percentage contracts of WTI oil prices
		Volume (Bbl)					1,341		2,000		2,000		1,782
		Percentage of WTI per Bbl					60%		60%		60%		60%
	2011 – Swap contracts
			Volume (Bbl)		750		750		750		750		750
			Price per Bbl	$	34.65	$	34.65	$	34.65	$	34.65	$	34.65
	2011 – Collar contracts
		Volume (Bbl)			1,000		1,000		1,000		1,000		1,000
		Price per Bbl:
			Ceiling	$	50.93	$	50.93	$	50.93	$	50.93	$	50.93
			Floor	$	42.21	$	42.21	$	42.21	$	42.21	$	42.21

21

PIONEER NATURAL RESOURCES COMPANY

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS

March 31, 2010

(Unaudited)

2012 – Swap contracts
	Volume (Bbl)		750		750		750		750		750
	Price per Bbl	$	35.03	$	35.03	$	35.03	$	35.03	$	35.03

_____________

(a) Subsequent to March 31, 2010, the Company converted NGL Percentage of WTI Oil Prices contracts to collar contracts with short puts for 2,000 Bbls per day of the Company's remaining 2010 production with a ceiling price of $58.92 per Bbl, a floor price of $47.64 per Bbl and a short put price of $38.71 per Bbl.

Gas prices. All material physical sales contracts governing the Company's gas production have been tied directly or indirectly to regional index prices where the gas is produced.  The Company uses derivative contracts to mitigate gas price volatility and reduce basis risk between NYMEX Henry Hub prices and actual index prices upon which the gas is sold. The following table sets forth as of March 31, 2010 the volumes in millions of British thermal units ("MMBtus") under outstanding gas derivative contracts and the weighted average index prices per MMBtu for those contracts:

			First		Second		Third		Fourth		Outstanding
			Quarter		Quarter		Quarter		Quarter		Average
Average daily gas production derivatives (a):
	2010 – Swap contracts
		Volume (MMBtu)				167,500		167,500		167,500		167,500
		Price per MMBtu			$	6.29	$	6.26	$	6.26	$	6.27
	2010 – Collar contracts
		Volume (MMBtu)				40,000		40,000		40,000		40,000
		Price per MMBtu:
		Ceiling			$	7.19	$	7.19	$	7.19	$	7.19
		Floor			$	5.75	$	5.75	$	5.75	$	5.75
	2010 – Collar contracts with short puts
		Volume (MMBtu)				95,000		95,000		95,000		95,000
		Price per MMBtu:
		Ceiling			$	7.94	$	7.94	$	7.94	$	7.94
		Floor			$	6.00	$	6.00	$	6.00	$	6.00
		Short put			$	5.00	$	5.00	$	5.00	$	5.00
	2010 – Basis swap contracts
		Volume (MMBtu)				295,000		295,000		248,587		279,473
		Price per MMBtu			$	(0.60)	$	(0.60)	$	(0.68)	$	(0.62)
	2011 – Swap contracts
		Volume (MMBtu)		97,500		97,500		97,500		97,500		97,500
		Price per MMBtu	$	6.32	$	6.32	$	6.32	$	6.32	$	6.32
	2011 – Collar contracts with short puts
		Volume (MMBtu)		200,000		200,000		200,000		200,000		200,000
		Price per MMBtu:
		Ceiling	$	8.55	$	8.55	$	8.55	$	8.55	$	8.55
		Floor	$	6.32	$	6.32	$	6.32	$	6.32	$	6.32
		Short put	$	4.88	$	4.88	$	4.88	$	4.88	$	4.88
	2011 – Basis swap contracts
		Volume (MMBtu)		120,000		120,000		120,000		120,000		120,000
		Price per MMBtu	$	(0.62)	$	(0.62)	$	(0.62)	$	(0.62)	$	(0.62)
	2012 – Swap contracts
		Volume (MMBtu)		2,500		2,500		2,500		2,500		2,500
		Price per MMBtu	$	6.77	$	6.77	$	6.77	$	6.77	$	6.77

22

PIONEER NATURAL RESOURCES COMPANY

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS

March 31, 2010

(Unaudited)

2012 – Collar contracts with short puts
	Volume (MMBtu)		190,000		190,000		190,000		190,000		190,000
	Price per MMBtu:
	Ceiling	$	7.96	$	7.96	$	7.96	$	7.96	$	7.96
	Floor	$	6.12	$	6.12	$	6.12	$	6.12	$	6.12
	Short put	$	4.55	$	4.55	$	4.55	$	4.55	$	4.55
2012 – Basis swap contracts
	Volume (MMBtu)		40,000		40,000		40,000		40,000		40,000
	Price per MMBtu	$	(0.47)	$	(0.47)	$	(0.47)	$	(0.47)	$	(0.47)
2013 – Swap contracts
	Volume (MMBtu)		12,500		12,500		12,500		12,500		12,500
	Price per MMBtu	$	6.59	$	6.59	$	6.59	$	6.59	$	6.59
2013 – Collar contracts with short puts
	Volume (MMBtu)		45,000		45,000		45,000		45,000		45,000
	Price per MMBtu:
	Ceiling	$	7.49	$	7.49	$	7.49	$	7.49	$	7.49
	Floor	$	6.00	$	6.00	$	6.00	$	6.00	$	6.00
	Short put	$	4.50	$	4.50	$	4.50	$	4.50	$	4.50
2013 – Basis swap contracts
	Volume (MMBtu)		10,000		10,000		10,000		10,000		10,000
	Price per MMBtu	$	(0.71)	$	(0.71)	$	(0.71)	$	(0.71)	$	(0.71)
2014 – Collar contracts with short puts
	Volume (MMBtu)		20,000		20,000		20,000		20,000		20,000
	Price per MMBtu:
	Ceiling	$	8.29	$	8.29	$	8.29	$	8.29	$	8.29
	Floor	$	6.00	$	6.00	$	6.00	$	6.00	$	6.00
	Short put	$	4.50	$	4.50	$	4.50	$	4.50	$	4.50

___________

(a) Subsequent to March 31, 2010, the Company entered into additional (i) swap contracts for 5,000 MMBtu per day of the Company's 2012 and 2013 production at an average price of $5.80 per MMBtu and $6.04 per MMBtu, respectively, and (ii) gas collar contracts with short puts for 30,000 MMBtu per day of the Company's 2014 production with a ceiling price of $7.94 per MMBtu, a floor price of $6.00 per MMBtu and a short put price of $4.50 per MMBtu.

Interest rate. The following table sets forth as of March 31, 2010 the notional amount of the Company's debt under outstanding variable-for-fixed and fixed-for-variable interest rate swap contracts, the weighted average fixed annual interest rate and termination date for those contracts:

Type (a)	Notional Amount		Weighted Average Fixed Interest Rate	Termination Date
	(in thousands)
Variable-for-fixed	$	189,000	3.0 percent	February 2011
Fixed-for-variable	$	400,000	2.87 percent	July 2016
Fixed-for-variable	$	60,000	3.21 percent	March 2017

___________

(a) Subsequent to March 31, 2010, the Company entered into $10 million notional amount of fixed-for-variable interest rate derivatives at a weighted average fixed annual rate of 3.35 percent and a termination date of March 2017.

Tabular disclosure of derivative fair value. All of the Company's derivatives were made up of non-hedge derivatives as of March 31, 2010 and December 31, 2009, except for $13.5 million and $17.9 million of net obligations on terminated hedges, respectively.

23

PIONEER NATURAL RESOURCES COMPANY

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS

March 31, 2010

(Unaudited)

The following tables provide disclosure of the Company's derivative instruments:

Fair Value of Derivative Instruments as of March 31, 2010
		Asset Derivatives (a)				Liability Derivatives (a)
Type			Balance Sheet Location	Fair Value		Balance Sheet Location	Fair Value
				(in thousands)			(in thousands)
Derivatives not designated as hedging instruments
	Commodity price derivatives		Derivatives - current	$	177,724	Derivatives - current	$	107,190
	Interest rate derivatives		Derivatives - current		11,300	Derivatives - current		4,357
	Commodity price derivatives		Derivatives - noncurrent		129,720	Derivatives - noncurrent		73,844
	Interest rate derivatives		Derivatives - noncurrent		6,851	Derivatives - noncurrent		21,228
Total derivatives not designated as hedging instruments					325,595			206,619
Derivatives designated as hedging instruments (b)
	Commodity price derivatives		Derivatives - current		456	Derivatives - current		13,954
Total derivatives designated as hedging instruments					456			13,954
Total derivatives				$	326,051		$	220,573

Fair Value of Derivative Instruments as of December 31, 2009
		Asset Derivatives (a)				Liability Derivatives (a)
Type			Balance Sheet Location	Fair Value		Balance Sheet Location	Fair Value
				(in thousands)			(in thousands)
Derivatives not designated as hedging instruments
	Commodity price derivatives		Derivatives - current	$	66,442	Derivatives - current	$	120,112
	Interest rate derivatives		Derivatives - current		9,450	Derivatives - current		5,169
	Commodity price derivatives		Derivatives - noncurrent		48,341	Derivatives - noncurrent		116,233
	Interest rate derivatives		Derivatives - noncurrent		2,192	Derivatives - noncurrent		24,314
Total derivatives not designated as hedging instruments					126,425			265,828
Derivatives designated as hedging instruments (b)
	Commodity price derivatives		Derivatives - current		-	Derivatives - current		17,913
Total derivatives designated as hedging instruments					-			17,913
Total derivatives				$	126,425		$	283,741

_____________

(a)	Derivative assets and liabilities shown in the tables above are presented as gross assets and liabilities, without regard to master netting arrangements which are considered in the presentations of derivative assets and liabilities in the accompanying consolidated balance sheets.
(b)	Represent derivative obligations under terminated hedge arrangements.

Derivatives in Cash Flow Hedging Relationships	Amount of Gain/(Loss) Recognized in OCI on Effective Portion
	Three Months Ended March 31,
	2010		2009
	(in thousands)
Interest rate derivatives	$	-	$	(433)
Commodity price derivatives		-		13,407
Total	$	-	$	12,974

24

PIONEER NATURAL RESOURCES COMPANY

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS

March 31, 2010

(Unaudited)

Derivatives in Cash Flow Hedging Relationships	Location of Gain/(Loss) Reclassified from AOCI into Earnings	Amount of Gain/(Loss) Reclassified from AOCI into Earnings
		Three Months Ended March 31,
		2010		2009
		(in thousands)
Interest rate derivatives	Interest expense	$	(1,058)	$	(2,254)
Interest rate derivatives	Derivative gains, net		(1,142)		-
Commodity price derivatives	Oil and gas revenue		23,126		41,422
Total		$	20,926	$	39,168

Derivatives in Cash Flow Hedging Relationships	Location of Gain/(Loss) Recognized in Earnings on Ineffective Portion	Amount of Gain/(Loss) Recognized in Earnings on Ineffective Portion
		Three Months Ended March 31,
		2010		2009
		(in thousands)
Commodity price derivatives	Derivative gains, net	$	-	$	(1)

Derivatives Not Designated as Hedging Instruments	Location of Gain (Loss) Recognized in Earnings on Derivative	Amount of Gain (Loss) Recognized in Earnings on Derivative
		Three Months Ended March 31,
		2010		2009
		(in thousands)
Interest rate derivatives	Derivative gains, net	$	11,399	$	(932)
Commodity price derivatives	Derivative gains, net		255,219		100,795
Total		$	266,618	$	99,863

AOCI - Hedging.  As of March 31, 2010 and December 31, 2009, AOCI - Hedging represented net deferred gains of $39.5 million and $51.0 million, respectively.  The AOCI - Hedging balance as of March 31, 2010 was comprised of $95.7 million of net deferred gains on the effective portions of discontinued commodity hedges, $3.9 million of net deferred losses on the effective portions of discontinued interest rate hedges and $25.3 million of associated net deferred tax provisions, reduced by $27.0 million of AOCI – Hedging net deferred gains attributable to and classified as noncontrolling interests in consolidated subsidiaries.

During the twelve months ending March 31, 2011, the Company expects to reclassify $74.0 million of AOCI – Hedging net deferred gains to oil and gas revenues and $2.0 million of AOCI – Hedging net deferred losses to interest expense. The Company also expects to reclassify $19.9 million of net deferred income tax provisions associated with hedge derivatives during the twelve months ending March 31, 2011 from AOCI - Hedging to income tax expense. For the remaining nine months of 2010 and the years ending December 31, 2011 and 2012, the Company expects to reclassify deferred gains (losses) on discontinued commodity hedges of $66.0 million, $32.9 million and $(3.2) million, respectively, to oil and gas revenues.

NOTE H.          Asset Retirement Obligations

The Company's asset retirement obligations primarily relate to the future plugging and abandonment of wells and related facilities.  Market risk premiums associated with asset retirement obligations are estimated to represent a component of the Company's credit-adjusted risk-free rate that is employed in the calculations of asset retirement obligations. The Company has no assets that are legally restricted for purposes of settling asset retirement obligations.

25

PIONEER NATURAL RESOURCES COMPANY

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS

March 31, 2010

(Unaudited)

The following table summarizes the Company's asset retirement obligation activity during the three months endedMarch 31, 2010 and 2009:

		Three Months Ended March 31,
		2010		2009
		(in thousands)
Beginning asset retirement obligations		$	166,434	$	172,433
	New wells placed on production and changes in estimates		278		39
	Disposition of wells		(26,248)		-
	Liabilities settled		(1,154)		(1,930)
	Accretion of discount from continuing operations		2,960		2,752
	Accretion of discount from discontinued operations		-		222
Ending asset retirement obligations		$	142,270	$	173,516

The Company records the current and noncurrent portions of asset retirement obligations in other current liabilities and other liabilities, respectively, in the accompanying consolidated balance sheets.  As of March 31, 2010 and December 31, 2009, the current portions of the Company's asset retirement obligations were $12.3 million and $13.9 million, respectively.

NOTE I.          Postretirement Benefit Obligations

As of March 31, 2010 and December 31, 2009, the Company had $9.0 million and $9.1 million, respectively, of unfunded accumulated postretirement benefit obligations, the current and noncurrent portions of which are included in other current liabilities and other liabilities, respectively, in the accompanying consolidated balance sheets.  These obligations are comprised of five plans of which four relate to predecessor entities that the Company acquired in prior years. These plans had no assets as of March 31, 2010 or December 31, 2009.  Other than participants in the Company's retirement plan, the participants of these plans are not current employees of the Company.

The following table reconciles changes in the Company's unfunded accumulated postretirement benefit obligations during the three months ended March 31, 2010 and March 31, 2009:

		Three Months Ended March 31,
		2010		2009
		(in thousands)
Beginning accumulated postretirement benefit obligations		$	9,075	$	9,612
	Net benefit payments		(312)		(329)
	Service costs		80		57
	Accretion of interest		108		164
Ending accumulated postretirement benefit obligations		$	8,951	$	9,504

NOTE J.          Commitments and Contingencies

Legal actions. The Company is party to the legal action that is described below. The Company is also a party to other proceedings and claims incidental to its business. While many of these matters involve inherent uncertainty, the Company believes that the amount of the liability, if any, ultimately incurred with respect to such other proceedings and claims will not have a material adverse effect on the Company's consolidated financial position as a whole or on its liquidity, capital resources or future annual results of operations. The Company will continue to evaluate its litigation on a quarter-by-quarter basis and will establish and adjust any litigation reserves as appropriate to reflect its assessment of the then current status of litigation.

Colorado Notice of Violation. On May 13, 2008, the Company was served with a Notice of Violation/Cease and Desist Order by the State of Colorado Department of Public Health and Environmental Water Quality Control

26

PIONEER NATURAL RESOURCES COMPANY

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS

March 31, 2010

(Unaudited)

Division (the “Division”). The Notice alleges violations of stormwater discharge permits in the Company's Raton Basin and former Lay Creek operations, specifically deficiencies in the Company's stormwater management plans, failure to implement and maintain best management practices to protect stormwater runoff and failure to conduct inspections of the stormwater management system. The Company is in advanced discussions with the Division to resolve this matter and does not believe that the outcome of this proceeding will materially impact the Company's liquidity, financial position or future results of operations.

Obligations following divestitures. In April 2006, the Company provided the purchaser of its Argentine assets 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, which primarily pertain to matters of litigation, environmental contingencies, royalty obligations and income taxes, are probable of having a material impact on its liquidity, financial position or future results of operations.

The Company has also retained certain liabilities and indemnified buyers for certain matters in connection with other divestitures, including the sale in 2007 of its Canadian assets.

NOTE K.          Net Income (Loss) Per Share Attributable To Common Stockholders

The Company’s basic net income (loss) per share attributable to common stockholders is computed as (i) net income (loss) attributable to common stockholders, (ii) less participating share- and unit-based basic earnings (iii) divided by weighted average basic shares outstanding. The Company’s diluted net income (loss) per share attributable to common stockholders is computed as (i) basic net income (loss) attributable to common stockholders, (ii) plus diluted adjustments to participating undistributed earnings (iii) divided by weighted average diluted shares outstanding. During periods in which the Company realizes a loss from continuing operations attributable to common stockholders, securities or other contracts to issue common stock would not be dilutive to loss per share and conversion into common stock is assumed not to occur.

The following table is a reconciliation of the Company’s net income (loss) attributable to common stockholders to basic net income (loss) attributable to common stockholders and to diluted net income (loss) attributable to common stockholders for the three months ended March 31, 2010 and 2009:

		Three Months Ended March 31,
		2010		2009
			(in thousands)
Net income (loss) attributable to common stockholders		$	245,254	$	(14,606)
	Participating basic distributed earnings (a)		(91)		(68)
	Participating basic undistributed earnings (a)		(5,235)		-
Basic net income (loss) attributable to common stockholders		239,928			(14,674)
	Diluted adjustments to participating undistributed earnings (a)		36		-
Diluted net income (loss) attributable to common stockholders		$	239,964	$	(14,674)

_____________

(a) In accordance with ASC 260, unvested restricted stock awards and Pioneer Southwest phantom unit awards represent participating securities because they participate in nonforfeitable dividends or distributions with the common equity owners of the Company or Pioneer Southwest, as applicable. Participating share- and unit-based earnings represent the distributed and undistributed earnings of the Company attributable to the participating securities. Unvested restricted stock awards and phantom unit awards do not participate in undistributed net losses as they are not contractually obligated to do so.

27

PIONEER NATURAL RESOURCES COMPANY

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS

March 31, 2010

(Unaudited)

The following table is a reconciliation of basic weighted average common shares outstanding to diluted weighted average common shares outstanding for the three months ended March 31, 2010 and 2009:

		Three Months Ended March 31,
		2010	2009
		(in thousands)
Weighted average common shares outstanding (a):
	Basic	114,655	114,242
	Dilutive common stock options (b)	224	-
	Contingently issuable - performance shares (b)	583	-
	Diluted	115,462	114,242

_____________

(a)

In 2007, the Company's board of directors ("Board") approved a $750 million share repurchase program of which $355.8 million remained available for purchase as of March 31, 2010.  During the first three months of 2010, the Company did not purchase any common stock pursuant to the program.  During the first three months of 2009, the Company purchased $16.3 million of common stock pursuant to the program.

(b)

Diluted earnings per share were calculated using the two-class method for the three months ended March 31, 2010 and 2009. The following common stock equivalents were excluded from the diluted loss per share calculations for the three months ended March 31, 2009 because they would have been anti-dilutive to the calculations:  484,690 of performance units for which shares are contingently issuable and stock options to purchase 317,886 common shares.

NOTE L.          Geographic Operating Segment Information

The Company has reportable operations in only one industry segment, that being the oil and gas exploration and production industry; however, the Company is organizationally structured along geographic operating segments or regions.  The Company has reportable continuing operations in the United States, South Africa and Tunisia.

The following tables provide the Company's geographic operating segment data for the three months endedMarch 31, 2010 and 2009.  Geographic operating segment income tax (provisions) benefits have been determined based on statutory rates existing in the various tax jurisdictions where the Company has oil and gas producing activities.  The "Headquarters" table column includes income and expenses that are not routinely included in the earnings measures internally reported to management on a geographic operating segment basis.

28

PIONEER NATURAL RESOURCES COMPANY

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS

March 31, 2010

(Unaudited)

				United States		South Africa		Tunisia		Headquarters		Consolidated  Total
Three Months Ended March 31, 2010					(in thousands)
	Revenues and other income:
		Oil and gas		$	446,662	$	25,381	$	35,753	$	-	$	507,796
		Interest and other			-		-		-		19,803		19,803
		Derivative gains, net			-		-		-		265,476		265,476
		Gain (loss) on disposition of assets, net			17,419		-		-		(476)		16,943
		Hurricane activity, net			7,410		-		-		-		7,410
					471,491		25,381		35,753		284,803		817,428
	Costs and expenses:
		Oil and gas production			85,323		776		3,616		-		89,715
		Production and ad valorem taxes			27,061		-		-		-		27,061
		Depletion, depreciation and amortization			115,505		21,897		6,175		7,191		150,768
		Exploration and abandonments			16,777		72		3,926		22		20,797
		General and administrative			-		-		-		40,948		40,948
		Accretion of discount on asset retirement
			obligations		-		-		-		2,960		2,960
		Interest			-		-		-		47,523		47,523
		Other			10,281		-		-		6,295		16,576
					254,947		22,745		13,717		104,939		396,348
	Income from continuing
		operations before income taxes			216,544		2,636		22,036		179,864		421,080
	Income tax provision				(80,121)		(738)		(11,601)		(68,014)		(160,474)
	Income from continuing operations			$	136,423	$	1,898	$	10,435	$	111,850	$	260,606

29

PIONEER NATURAL RESOURCES COMPANY

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS

March 31, 2010

(Unaudited)

				United States		South Africa		Tunisia		Headquarters		Consolidated Total
Three Months Ended March 31, 2009				(in thousands)
	Revenues and other income:
		Oil and gas		$	327,784	$	11,806	$	28,261	$	-	$	367,851
		Interest and other			-		-		-		10,660		10,660
		Derivative gains, net			-		-		-		99,863		99,863
		Loss on disposition of assets, net			-		-		-		(115)		(115)
		Hurricane activity, net			(375)		-		-		-		(375)
					327,409		11,806		28,261		110,408		477,884
	Costs and expenses:
		Oil and gas production			98,109		3,497		8,825		-		110,431
		Production and ad valorem taxes			27,699		-		-		-		27,699
		Depletion, depreciation and amortization			159,969		16,554		4,317		7,304		188,144
		Impairment of oil and gas properties			21,091		-		-		-		21,091
		Exploration and abandonments			23,390		94		7,304		382		31,170
		General and administrative			-		-		-		34,654		34,654
		Accretion of discount on asset retirement
			obligations		-		-		-		2,752		2,752
		Interest			-		-		-		41,138		41,138
		Other			20,286		-		-		11,103		31,389
					350,544		20,145		20,446		97,333		488,468
	Income (loss) from continuing
		operations before income taxes			(23,135)		(8,339)		7,815		13,075		(10,584)
	Income tax benefit (provision)				8,560		2,418		(5,046)		(5,191)		741
	Income (loss) from continuing operations			$	(14,575)	$	(5,921)	$	2,769	$	7,884	$	(9,843)

NOTE M.          Impairment of Oil and Gas Properties

During the first quarter of 2009, the Company recognized a noncash impairment charge of $21.1 million to reduce the carrying value of its Uinta/Piceance area oil and gas properties.  The impairment charge resulted from declines in commodity prices and well performance which reduced the Company’s assessment of economically recoverable resource potential.  The impairment charge reduced the Company’s Uinta/Piceance area oil and gas property carrying values to their estimated fair value on that date based on the estimated discounted future cash flows attributable to the assets, which were derived from Level 3 fair value inputs.

The Company's primary assumptions of the estimated future cash flows attributable to oil and gas properties are based on (i) proved reserves and risk-adjusted probable and possible reserves and (ii) management's commodity price outlook, which is based in part on forward market quotes.

NOTE N.           Volumetric Production Payments

The Company's VPPs represent limited-term overriding royalty interests in oil reserves that: (i) entitle the purchaser to receive production volumes over a period of time from specific lease interests, (ii) are free and clear of all associated future production costs and capital expenditures associated with the reserves, (iii) are nonrecourse to the Company (i.e., the purchaser's only recourse is to the reserves acquired), (iv) transfer title of the reserves to the purchaser and (v) allow the Company to retain the remaining reserves after the VPPs volumetric quantities have been delivered.

At the inception of the VPP agreements, the Company (i) removed the proved reserves associated with the VPPs, (ii) recognized VPP proceeds as deferred revenue which are being amortized on a unit-of-production basis to oil revenues over the remaining term of each VPP, (iii) retained responsibility for 100 percent of the production costs and capital costs related to VPP interests and (iv) no longer recognizes production associated with the VPP volumes.

30

PIONEER NATURAL RESOURCES COMPANY

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS

March 31, 2010

(Unaudited)

The following table provides information about changes in the deferred revenue carrying values of the Company's VPPs for the three months ended March 31, 2010 (in thousands):

Deferred revenue at December 31, 2009	$	177,236
Less: 2010 amortization		(22,483)
Deferred revenue at March 31, 2010	$	154,753

The remaining deferred revenue amounts will be recognized in oil revenues in the consolidated statements of operations as noted below, assuming the related VPP production volumes are delivered as scheduled (in thousands):

Remaining 2010	$	67,733
2011		44,951
2012		42,069
	$	154,753

NOTE O.          Interest and Other Income

The following table provides the components of the Company's interest and other income:

	Three Months Ended March 31,
	2010		2009
	(in thousands)
Alaskan Petroleum Production Tax credits (a)	$	14,248	$	7,478
Foreign currency remeasurement and exchange gains (b)		1,879		1,351
Insurance claim recovery		1,665		-
Other income		603		607
Deferred compensation plan income		510		787
Drilling income		510		-
Interest income		388		437
Total interest and other income	$	19,803	$	10,660

_____________

(a)	The Company earns Alaskan Petroleum Production Tax ("PPT") credits on qualifying capital expenditures.  The Company recognizes income from PPT credits when they are realized through cash refunds or sales.
(b)	The Company's operations in Africa periodically recognize monetary assets and liabilities in currencies other than their functional currencies. Associated therewith, the Company realizes foreign currency remeasurement and transaction gains and losses.

31

PIONEER NATURAL RESOURCES COMPANY

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS

March 31, 2010

(Unaudited)

NOTE P.          Other Expense

The following table provides the components of the Company's other expense:

	Three Months Ended March 31,
	2010		2009
	(in thousands)
Excess and terminated rig related costs (a)	$	10,281	$	20,286
Well servicing operations (b)		3,081		2,991
Inventory impairment (c)		1,557		1,170
Foreign currency remeasurement and exchange losses (d)		704		1,325
Other		576		705
Bad debt expense (recoveries)		224		(686)
Contingency and environmental accrual adjustments		153		5,598
Total other expense	$	16,576	$	31,389

_____________

(a)	Represents above market drilling rig costs, idle rig costs and costs incurred to terminate contractual drilling rig commitments prior to their contractual maturities.
(b)	Represents idle well servicing costs.
(c)	Represents impairment charges to reduce the carrying value of excess lease and well equipment and supplies inventories to their estimated net realizable values.
(d)	The Company’s operations in Africa periodically recognize monetary assets and liabilities in currencies other than their functional currencies. Associated therewith, the Company realizes foreign currency remeasurement and transaction gains and losses.

NOTE Q.          Insurance Claims

As a result of Hurricane Rita in September 2005, the Company's East Cameron facility, located in the Gulf of Mexico shelf, was destroyed. As of March 31, 2010, the Company estimates that it will cost approximately $6 million to complete the reclamation and abandonment of the East Cameron facility.

The operations to reclaim and abandon the East Cameron facilities began in January 2007. The remaining estimated cost to reclaim and abandon the East Cameron facilities contains a number of assumptions that could cause the ultimate cost to be higher or lower than the estimate, as there are many uncertainties when working offshore and underwater with low visibility. The Company has expended $199.0 million on the reclamation and abandonment of the East Cameron facility through March 31, 2010.

During the three months ended March 31, 2010, the Company received $7.7 million from its insurance providers related to debris removal, which was credited to Hurricane activity, net in the accompanying consolidated statement of operations.  In 2007, the Company commenced legal actions against its insurance carriers regarding policy coverage issues, primarily related to debris removal, certain costs associated with plugging and abandonment, and the well restoration and safety coverages. The Company believes that a substantial portion of the unrecovered costs incurred on the reclamation and abandonment of the East Cameron facility will be recoverable from insurance in the future.

NOTE R.           Discontinued Operations

The Company sold substantially all of its Mississippi assets and shelf properties in the Gulf of Mexico during June and August 2009, respectively.  The Company has reflected the results of operations of these properties as discontinued operations, rather than as a component of continuing operations, in the accompanying consolidated statements of operations.

32

PIONEER NATURAL RESOURCES COMPANY

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS

March 31, 2010

(Unaudited)

The following table represents the components of the Company's discontinued operations for the three months ended March 31, 2009:

		Three Months Ended March 31, 2009
		(in thousands)
Revenues and other income:
	Oil and gas	$	5,986
Costs and expenses:
	Oil and gas production		2,538
	Production and ad valorem taxes		59
	Depletion, depreciation and amortization (a)		4,413
	Exploration and abandonments (a)		261
	General and administrative		(15)
	Accretion of discount on asset retirement obligations (a)		222
			7,478
Loss from discontinued operations before income taxes			(1,492)
Deferred income tax benefit (a)			522
Loss from discontinued operations		$	(970)

_____________

(a) Represents the significant noncash components of discontinued operations.

As of March 31, 2010 and December 31, 2009, the Company’s accounts receivable – trade includes $25.7 million and $119.3 million, respectively, of receivables from the United States Department of Interior Minerals Management Service (the "MMS") for the recovery of excess royalties paid by the Company on qualifying deepwater leases in the Gulf of Mexico. The Company received $93.6 million from the MMS during March 2010 and received payment of the remaining balance during April 2010.

NOTE S.          Subsequent Events

The Company has evaluated subsequent events through the date of issuance of its unaudited consolidated financial statements. Except as disclosed in Note R, the Company is not aware of any reportable subsequent events.

33

PIONEER NATURAL RESOURCES COMPANY

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

Financial and Operating Performance

The Company's financial and operating performance for the first quarter of 2010 included the following highlights:

• Earnings attributable to common stockholders was $245.3 million ($2.08 per diluted share), as compared to net loss attributable to common stockholders of $14.6 million ($0.13 per diluted share) for the first quarter of 2009. The increase in earnings attributable to common stockholders is primarily due to increases in mark-to-market derivative gains and an increase in oil and gas revenues.

• Daily sales volumes from continuing operations decreased by nine percent to 114,321 BOEPD during the first quarter of 2010, as compared to 125,318 BOEPD during the first quarter of 2009. The decrease in first quarter 2010 sales volumes, as compared to the first quarter of 2009, was primarily due to a curtailment of drilling activities during 2009 and the sale during the first three months of 2009 of 2,502 BOEPD of stored NGL volumes that were previously deferred as a result of damage caused to Gulf Coast fractionation facilities by Hurricane Ike in September 2008.

• Average reported oil, NGL and gas prices from continuing operations increased during the first quarter of 2010 to $88.74 per Bbl, $41.82 per Bbl and $5.30 per Mcf, respectively, as compared to respective prices of $53.10 per Bbl, $22.93 per Bbl and $4.35 per Mcf during the first quarter of 2009.

• Average per-BOE oil and gas production costs from continuing operations decreased during the first quarter of 2010 to $8.72, as compared to $9.77 per BOE during the first quarter of 2009, primarily as a result of the Company’s cost reduction efforts initiated during 2008 in response to significantly lower commodity prices.

• Net cash provided by operating activities increased to $299.4 million for the first quarter of 2010, as compared to $24.4 million for the first quarter of 2009.  The $275.0 million increase in net cash provided by operating activities was primarily due to increases in oil and gas revenues, decreases in production costs and changes in working capital, which provided a net cash source during the first quarter of 2010 as compared to a net cash use during the first quarter of 2009.

• Gain on disposition of assets, net, totaled $16.9 million for the first quarter of 2010, as compared to a loss of $115 thousand during the first quarter of 2009. The first quarter 2010 gain is primarily associated with the sale of certain proved and unproved oil and gas properties in the Uinta/Piceance area.

Second Quarter 2010 Outlook

Based on current estimates, the Company expects that second quarter 2010 production will average 113,000 to 118,000 BOEPD. The range reflects the planned oil export schedule for Tunisia.

Second quarter production costs (including production and ad valorem taxes and transportation costs) are expected to average $11.50 to $13.50 per BOE based on current NYMEX strip prices for oil, NGLs and gas. Depletion, depreciation and amortization ("DD&A") expense is expected to average $14.25 to $15.50 per BOE.

Total exploration and abandonment expense for the quarter is expected to be $25 million to $35 million, primarily related to exploration wells, including related acreage costs, and seismic and personnel costs. General and administrative expense is expected to be $40 million to $43 million. Interest expense is expected to be $47 million to $50 million, and other expense is expected to be $12 million to $17 million. Accretion of discount on asset retirement obligations is expected to be $2 million to $4 million.

Noncontrolling interest in consolidated subsidiaries' net income, excluding noncash mark-to-market adjustments, is expected to be $9 million to $12 million, primarily reflecting the public ownership in Pioneer Southwest.

The Company's second quarter effective income tax rate is expected to range from 40 percent to 50 percent, assuming current capital spending plans, higher tax rates in certain foreign jurisdictions and no significant mark-to-market changes in the Company's derivative position. Cash income taxes are expected to range from $10 million to $15 million, principally related to Tunisian income taxes.

34

PIONEER NATURAL RESOURCES COMPANY

Operations and Drilling Highlights

The following table summarizes the Company's average daily oil, NGL, gas and total production by asset area during the three months ended March 31, 2010:

		Oil (Bbls)		NGLs (Bbls)		Gas (Mcf)		Total (BOE)
United States:
	Permian Basin		15,492		10,068		42,830		32,698
	Mid-Continent		4,206		7,962		56,315		21,554
	Rocky Mountains		36		38		178,220		29,777
	Barnett Shale		96		1,048		9,961		2,804
	South Texas		155		-		58,701		9,937
	Alaska		5,818		-		-		5,818
	Other		-		-		221		39
			25,803		19,116		346,248		102,627
South Africa			1,111		-		31,033		6,283
Tunisia			4,953		-		2,744		5,411
Total Worldwide			31,867		19,116		380,025		114,321

The Company intends to limit 2010 capital expenditures, excluding acquisitions, effects of asset retirement obligations, capitalized interest and geological and geophysical administrative costs, to internally-generated operating cash flow for the year. During the three months ended March 31, 2010, cash flow from operating activities was $299.4 million and the Company's capital expenditures, excluding acquisitions, effects of asset retirement obligations, capitalized interest and geological and geophysical administrative costs, were $157.0 million.

The following table summarizes by geographic area the Company's finding and development costs incurred during the three months ended March 31, 2010:

										Asset
		Acquisition Costs				Exploration		Development			Retirement
		Proved		Unproved		Costs		Costs		Obligations		Total
		(in thousands)
United States:
	Permian Basin	$	154	$	(420)	$	2,763	$	86,836	$	79	$	89,412
	Mid-Continent		-		-		194		461		-		655
	Rocky Mountains		(27)		169		2,212		860		-		3,214
	Barnett Shale		(89)		9,777		2,609		83		-		12,380
	South Texas		96		32,903		27,117		987		16		61,119
	Alaska		-		-		10,823		24,944		183		35,950
	Other		-		-		2		-		-		2
			134		42,429		45,720		114,171		278		202,732
South Africa			-		-		72		-		-		72
Tunisia			-		-		4,894		6,379		-		11,273
Other			-		-		23		-		-		23
Total Worldwide		$	134	$	42,429	$	50,709	$	120,550	$	278	$	214,100

35

PIONEER NATURAL RESOURCES COMPANY

The following table summarizes the Company's development and exploration/extension drilling activities for the three months ended March 31, 2010:

	Development Drilling
	Beginning Wells	Wells	Successful	Unsuccessful	Ending Wells
	in Progress	Spud	Wells	Wells	in Progress
United States	11	88	83	-	16

	Exploration/Extension Drilling
	Beginning Wells	Wells	Successful	Unsuccessful	Ending Wells
	in Progress	Spud	Wells	Wells	in Progress
United States	8	5	3	-	10
Tunisia	5	-	1	-	4
Total Worldwide	13	5	4	-	14

Permian Basin area. During the first quarter of 2010, the Company drilled 82 wells in the Spraberry field. The Company is currently utilizing 19 rigs, and plans to drill approximately 425 wells during 2010. The Company intends to continue to expand its drilling program past 2010, with plans to increase its rig count to 40 rigs by 2012, which will allow the Company to drill approximately 1,000 wells per year. The Company acquired four rigs during the first quarter of 2010 and plans to acquire an additional four to six Company-owned rigs to support about 25 percent of the planned 40-rig program.

During 2010, the Company commenced a Spraberry field waterflood project that is located on approximately 7,000 acres within an existing Spraberry unit. Drilling, conversion and facility work should be completed during the second quarter of 2010 with water injection commencing during the second half of 2010.

During 2008, the Company initiated a program to test 20-acre infill drilling performance, as part of its announced recovery improvement initiatives. The Company drilled and completed eleven 20-acre wells in 2008 and completed nine additional 20-acre wells in 2009 with encouraging results. In the second half of 2010, the Company plans to drill approximately 25 additional 20-acre wells.

South Texas area. The Company’s drilling activities in the South Texas area during 2010 will be primarily focused on delineation and development of Pioneer’s substantial acreage position in the Eagle Ford Shale play.

Two exploratory Eagle Ford Shale wells, the Crawley Gas Unit No. 1 and the Riedesel Gas Unit No. 1, were successfully completed and placed on production during the first quarter of 2010. The Handy No. 1 well was completed during April 2010 and after initial testing was shut in pending permanent facility construction, which is expected to be completed in mid-May 2010.  The Company is currently running two drilling rigs in the Eagle Ford Shale play, but intends to add four additional rigs by the end of 2010.

The Company has announced plans to seek a joint venture partner for a portion of its Eagle Ford Shale acreage position. The Company expects to receive bids from potential joint venture partners during May 2010 and announce the result of the joint venture process by the end of the second quarter. There is no assurance that a joint venture transaction can be consummated on terms acceptable to the Company.

Alaska. During the first quarter of 2010, the Company continued drilling activities at its Oooguruk development project. The Company drilled and completed two horizontal wells during the first quarter of 2010, one production well and one water injection well, and completed an additional water injection well, all within the project's Kuparuk reservoir. The newly drilled and completed water injection well will be pre-produced prior to commencing water injection.  Combined initial gross production rates from the Kuparuk production well and pre-produced water injector averaged 7,500 barrels of oil per day. The Company also fracture-stimulated an exploration well in the Moraine reservoir with extended flow testing and analysis planned for the remainder of 2010.

On the Company's Cosmopolitan Unit project in the Cook Inlet, the Company drilled a lateral sidetrack during 2007 from an existing wellbore on an onshore site to further appraise the resource potential of the unit. The initial un-stimulated production test results were encouraging. The Company performed casing repair workover operations on

36

PIONEER NATURAL RESOURCES COMPANY

the well during the fourth quarter of 2009 and fracture-stimulated the well during the first quarter of 2010 and plans to perform extended flow testing and analysis of the well during the remainder of 2010. The Company will continue to conduct permitting activities and facilities planning and may drill another appraisal well during 2011.

Tunisia. Following an extensive geosciences work program, the Company plans to recommence its drilling program in the Company-operated Cherouq concession during the second quarter of 2010.  Drilling is planned to commence on the first of three wells planned for 2010. Additionally, the Company is upgrading its existing production facilities by installing permanent processing equipment and artificial lift, which it intends to utilize to optimize production and reduce production costs.

During the first quarter of 2010, the Company continued its development activities on the Adam Concession with the successful drilling and completion of a development well that was placed on production during the quarter. A second development well is scheduled to be drilled on the concession later in 2010. On the Borj El Khadra Permit, the Company began the acquisition and processing of 1,185 square kilometers of 3-D seismic data in order to high grade leads identified on existing 2-D seismic data. The Company plans to drill an exploration well on the permit in the second half of 2010, following interpretation of the processed data.

In the Anaguid Permit, the Company has submitted a plan of development in order to convert a portion of the existing exploration permit into a production concession to enable it to commence production from its Durra-1 discovery well. Additionally, the Company plans to complete the interpretation of the previously acquired seismic data and drill an additional exploration well during the first half of 2010.

Results of Operations

Oil and gas revenues.  Oil and gas revenues totaled $507.8 million for the three months ended March 31, 2010, as compared to $367.9 million for the same respective period of 2009.

The increase in oil and gas revenues from continuing operations during the three months ended March 31, 2010, as compared to the same period of 2009, is reflective of increases in revenues for all geographic operating segments. The increase in revenues was due to increases in average reported commodity prices, partially offset by decreases in sales volumes in the United States and Tunisia as a result of significant reductions in drilling activity during 2009.

The following table provides average daily sales volumes from continuing operations, by geographic area and in total, for the three months ended March 31, 2010 and 2009:

		Three Months Ended March 31,
		2010	2009
Oil (Bbls):
	United States	25,803	26,358
	South Africa	1,111	245
	Tunisia	4,953	6,349
	Worldwide	31,867	32,952
NGLs (Bbls):
	United States	19,116	22,655
Gas (Mcf):
	United States	346,248	385,636
	South Africa	31,033	30,283
	Tunisia	2,744	2,346
	Worldwide	380,025	418,265
Total (BOE):
	United States	102,627	113,286
	South Africa	6,283	5,292
	Tunisia	5,411	6,740
	Worldwide	114,321	125,318

37

 

PIONEER NATURAL RESOURCES COMPANY

In the United States, average daily sales volumes decreased by nine percent during the first quarter of 2010, as compared to the first quarter of 2009.  In the same quarter-to-quarter comparison, average sales volumes decreased by 20 percent in Tunisia, while average daily sales volumes increased by 19 percent in South Africa.

During the three months ended March 31, 2010, as compared to the three months ended March 31, 2009, oil volumes delivered under the Company's VPPs decreased by nine percent. The Company satisfied its remaining VPP gas delivery obligations at the end of 2009.

The oil, NGL and gas prices that the Company reports are based on the market price received for the commodities adjusted by the results of the Company's cash flow hedging activities and the amortization of deferred VPP revenue.

The following table provides average reported prices from continuing operations (including the results of hedging activities and the amortization of deferred VPP revenue) and average realized prices from continuing operations (excluding the results of hedging activities and the amortization of deferred VPP revenue) by geographic area and in total, for the three months ended March 31, 2010 and 2009:

	Three Months Ended March 31,
	2010		2009
Average reported prices:
Oil (per Bbl):
United States	$	92.07	$	54.56
South Africa	$	77.58	$	47.00
Tunisia	$	73.88	$	47.25
Worldwide	$	88.74	$	53.10
NGL (per Bbl):
United States	$	41.82	$	22.93
Gas (per Mcf):
United States	$	5.16	$	4.37
South Africa	$	6.31	$	3.95
Tunisia	$	11.41	$	5.96
Worldwide	$	5.30	$	4.35
Average realized prices:
Oil (per Bbl):
United States	$	73.60	$	34.79
South Africa	$	77.58	$	47.00
Tunisia	$	73.88	$	47.25
Worldwide	$	73.78	$	37.28
NGL (per Bbl):
United States	$	40.77	$	21.78
Gas (per Mcf):
United States	$	5.13	$	3.54
South Africa	$	6.31	$	3.95
Tunisia	$	11.41	$	5.96
Worldwide	$	5.28	$	3.58

Derivative activities. The Company utilizes commodity swap contracts, collar contracts, collar contracts with short puts and NGL Percentage of WTI Oil Prices contracts in order to (i) reduce the effect of price volatility on the commodities the Company produces and sells, (ii) support the Company's annual capital budgeting and expenditure plans and (iii) reduce commodity price risk associated with certain capital projects. See Note G of Notes to Consolidated Financial Statements included in "Item 1. Financial Statements" for the scheduled amortization of net deferred gains and losses on discontinued commodity hedges that will be recognized as increases or decreases to future oil and gas revenues.

38

PIONEER NATURAL RESOURCES COMPANY

The following table provides the net effect of settlements of oil, NGL and gas price hedges on oil, NGL and gas revenue from continuing operations for the three months ended March 31, 2010 and 2009:

	Three Months Ended March 31,
	2010			2009
Increase to oil revenue from hedging activity	$	20,417	$	22,364
Increase to NGL revenue from hedging activity		1,799		2,336
Increase to gas revenue from hedging activity		910		16,722
Total	$	23,126	$	41,422

Deferred revenue.  During the three months ended March 31, 2010, the Company’s amortization of deferred VPP revenue increased oil and gas revenues by $22.5 million, as compared to an increase of $36.7 million during the same period of 2009.  See Note N of Notes to Consolidated Financial Statements included in "Item 1. Financial Statements" for specific information regarding the Company's VPPs.

Interest and other income. Interest and other income for the three months ended March 31, 2010 was $19.8 million, as compared to $10.7 million for the same period in 2009.  The increase in interest and other income from continuing operations during the three months ended March 31, 2010, as compared to the same period in 2009, was primarily due to a $6.8 million increase in Alaskan petroleum production tax credits and the receipt of $1.7 million related to an insurance claim recovery.  See Note O of Notes to Consolidated Financial Statements included in "Item 1. Financial Statements" for additional information regarding interest and other income.

Derivative gains, net. During the three months ended March 31, 2010, the Company recorded $265.5 million of net derivative gains on commodity price and interest rate derivatives, of which $266.9 million represented unrealized gains subject to continuing market risk and $1.5 million represented realized losses. During the three months ended March 31, 2009, the Company recorded $99.9 million of net derivative gains, of which $74.5 million represented unrealized gains subject to continuing market risk.

Gain (loss) on disposition of assets. The Company recorded net gains on the disposition of assets of $16.9 million during the three months ended March 31, 2009, as compared to a net loss on the disposition of assets of $115 thousand during the same period of 2009. The increase in net gains is primarily associated with the first quarter 2010 sale of certain proved and unproved oil and gas properties in the Uinta/Piceance area.

Hurricane activity, net. The Company recorded net hurricane related activity recoveries of $7.4 million during the three months ended March 31, 2010, as compared to net hurricane related charges of $375 thousand during the same period of 2009. Hurricane activity, net is associated with the Company's East Cameron platform facility, located on the Gulf of Mexico shelf, which was destroyed during 2005 by Hurricane Rita.

The Company estimates that it will expend approximately $6 million to complete the operations to reclaim and abandon the East Cameron platform facilities during 2010. Since January 2007, the Company has expended approximately $199.0 million on operations to reclaim and abandon the East Cameron platform facilities. The Company's remaining estimate to reclaim and abandon the East Cameron facilities is based upon an analysis prepared by the Company. See Note Q of Notes to Consolidated Financial Statements included in "Item 1. Financial Statements" for specific information regarding the Company's East Cameron facility reclamation and abandonment.

Oil and gas production costs.  The Company recorded oil and gas production costs of $89.7 million during the three months ended March 31, 2010, as compared to $110.4 million during the same period of 2009.  In general, lease operating expenses and workover expenses represent the components of oil and gas production costs over which the Company has management control, while third-party transportation charges represent the cost to transport volumes produced to a sales point. Net natural gas plant/gathering charges represent the net costs to gather and process the Company's gas, reduced by net revenues earned from gathering and processing of third party gas in Company-owned facilities.

Total oil and gas production costs per BOE from continuing operations decreased by 11 percent during the three months ended March 31, 2010, as compared to the same period in 2009.  The decrease in United States production costs is primarily due to cost reduction efforts, improved margins from gas processing operations and

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PIONEER NATURAL RESOURCES COMPANY

reductions in VPP delivery commitments.  The decrease in South Africa production costs per BOE is primarily attributable to a decrease in operating costs and an increase in sales volumes. The decrease in Tunisia production costs per BOE is associated with Adam concession tariff recoveries and reduced workover activities.

The following tables provide the components of the Company's oil and gas production costs per BOE from continuing operations and total production costs per BOE from continuing operations by geographic area for the three months ended March 31, 2010 and 2009:

	Three Months Ended March 31,
	2010		2009
Lease operating expenses	$	7.08	$	7.72
Third-party transportation charges		0.90		0.94
Net natural gas plant/gathering charges		(0.24)		0.50
Workover costs		0.98		0.61
Total production costs	$	8.72	$	9.77

	Three Months Ended March 31,
	2010		2009
United States	$	9.24	$	9.62
South Africa	$	1.37	$	7.34
Tunisia	$	7.43	$	14.55
Worldwide	$	8.72	$	9.77

Production and ad valorem taxes.  The Company recorded production and ad valorem taxes of $27.1 million during the three months ended March 31, 2010, as compared to $27.7 million for the same period of 2009. In general, production taxes and ad valorem taxes are directly related to commodity price changes; however, Texas ad valorem taxes are based upon prior year commodity prices, whereas production taxes are based upon current year commodity prices. Consequently, during the three months ended March 31, 2010, the Company's production taxes per BOE have increased 17 percent, reflecting increasing commodity prices, while ad valorem taxes have slightly decreased during the same period.

The following table provides the Company's production and ad valorem taxes per BOE from continuing operations and total production and ad valorem taxes per BOE from continuing operations for the three months ended March 31, 2010 and 2009:

		Three Months Ended March 31,
		2010		2009
Ad valorem taxes		$	1.41	$	1.42
Production taxes			1.22		1.04
	Total ad valorem and production taxes	$	2.63	$	2.46

Depletion, depreciation and amortization expense.  The Company's total DD&A expense was $150.8 million ($14.65 per BOE) for the three months ended March 31, 2010, as compared to $188.1 million ($16.68 per BOE) during the same period of 2009.  The decrease in DD&A expense during the three months ended March 31, 2010, as compared to the same period of 2009, is primarily due to a decrease in depletion expense on oil and gas properties.

Depletion expense was $13.95 per BOE during the three months ended March 31, 2010, as compared to $16.03 per BOE during the same period of 2009.  The 13 percent decrease in per-BOE depletion expense during the three months ended March 31, 2010 is primarily due to an increase in proved reserves as a result of higher commodity prices extending the economic lives of proved properties.

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PIONEER NATURAL RESOURCES COMPANY

The following table provides depletion expense per BOE from continuing operations by geographic area for the three months ended March 31, 2010 and 2009:

	Three Months Ended March 31,
	2010		2009
United States	$	12.51	$	15.69
South Africa	$	38.72	$	34.76
Tunisia	$	12.68	$	7.12
Worldwide	$	13.95	$	16.03

Impairment of oil and gas properties. The Company reviews its long-lived assets to be held and used, including oil and gas properties, whenever events or circumstances indicate that the carrying value of those assets may not be recoverable. The Company recognized an impairment charge of $21.1 million to reduce the carrying value of the Company's oil and gas properties in the Uinta/Piceance areas during the three months ended March 31, 2009. Declines in gas prices and downward adjustments to the economically recoverable resource potential of the Company’s Uinta/Piceance oil and gas properties during the first quarter of 2009 led to the impairment charges.

See Note M of Notes to Consolidated Financial Statements included in "Item 1. Financial Statements" for additional information regarding the Company's impairment assessments and the primary factors that impact the Company's assessments of oil and gas properties for impairment.

Exploration and abandonments expense.  The following tables provide the Company's geological and geophysical costs, exploratory dry holes expense and lease abandonments and other exploration expense by geographic area for the three months ended March 31, 2010 and 2009 (in thousands):

	United		South
	States		Africa		Tunisia		Other		Total
Three Months Ended March 31, 2010
Geological and geophysical	$	13,067	$	72	$	3,947	$	22	$	17,108
Exploratory dry holes		(109)		-		(21)		-		(130)
Leasehold abandonments and other		3,819		-		-		-		3,819
	$	16,777	$	72	$	3,926	$	22	$	20,797
Three Months Ended March 31, 2009
Geological and geophysical	$	9,979	$	94	$	2,290	$	382	$	12,745
Exploratory dry holes		(115)		-		5,014		-		4,899
Leasehold abandonments and other		13,526		-		-		-		13,526
	$	23,390	$	94	$	7,304	$	382	$	31,170

The Company's exploration and abandonment expense during the three months ended March 31, 2010 is primarily attributable to geological and geophysical personnel costs and unproved property abandonments.  During the three months ended March 31, 2010, the Company's exploration and abandonment expense included exploratory dry holes and leasehold abandonment expenses of $3.7 million, which is primarily comprised of U.S. unproved property abandonments.

During the three months ended March 31, 2010, the Company drilled and evaluated four exploration/extension wells, all of which were successfully completed as discoveries.  During the same period in 2009, the Company drilled and evaluated three exploration/extension wells, one of which was successfully completed as a discovery.

General and administrative expense.  General and administrative expense for the three months ended March 31, 2010 was $40.9 million, as compared to $34.7 million during the same period of 2009. The increase in general and administrative expense during the three months ended March 31, 2010, as compared to the three months ended March 31, 2009, was primarily due to a $1.9 million increase in performance-related compensation, a $1.7 million increase in share-based compensation-related expenses, a $1.2 million increase in other compensation expenses and a $1.1 million increase in office occupancy expense.

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PIONEER NATURAL RESOURCES COMPANY

Accretion of discount on asset retirement obligations.Accretion of discount on asset retirement obligations was $3.0 million for the three months ended March 31, 2010, as compared to $2.8 million during the same period of 2009.  See Note H of Notes to Consolidated Financial Statements in "Item 1. Financial Statements" for information regarding the Company's asset retirement obligations.

Interest expense.  Interest expense was $47.5 million for the three months ended March 31, 2010, as compared to $41.1 million during the same period of 2009.  The weighted average interest rate on the Company's indebtedness for the three months ended March 31, 2010, including the effects of interest rate derivatives and capitalized interest, was 6.8 percent, as compared to 5.3 percent for the same period of 2009.

The $6.4 million increase in interest expense during the three months ended March 31, 2010, as compared to the same period of 2009, was primarily due to an $8.5 million increase in cash interest expense on long-term senior notes, partially offset by an increase of $1.1 million in capitalized interest.

Other expense. Other expense for the three months ended March 31, 2010 was $16.6 million, as compared to $31.4 million for the same period of 2009.  The $14.8 million decrease in other expense for the three months ended March 31, 2010 is primarily attributable to a $10.0 million decrease in excess and terminated rig related costs, and a $5.4 million decrease in contingency and environmental accrual adjustments.  See Note P of Notes to Consolidated Financial Statements included in "Item 1. Financial Statements" for additional information.

Income tax provision. The Company recognized an income tax provision from continuing operations of $160.5 million during the three months ended March 31, 2010, as compared to an income tax benefit of $741 thousand during the first quarter of 2009.  The increase in the income tax provision for the three months ended March 31, 2010, as compared to the same period of 2009, is primarily due to increases in income from continuing operations before income taxes, reflecting the significant increases in commodity prices and noncash derivative gains associated with mark-to-market accounting. The Company's effective tax rates on continuing operations of 40 percent during the three months ended March 31, 2010, excluding income attributable to noncontrolling int erests, differs from the combined United States federal and state statutory rate of approximately 37 percent primarily due to:

• foreign tax rates,

• statutes in foreign jurisdictions that differ from those in the U.S.,

See Note E of Notes to Consolidated Financial Statements included in "Item 1. Financial Statements" for additional information regarding the Company's income taxes.

Loss from discontinued operations, net of tax. The Company reported loss from discontinued operations, net of tax of $970 thousand for the three months ended March 31, 2009. See Note R of the Notes to Consolidated Financial Statements included in "Item 1. Financial Statements" for specific information regarding the Company's discontinued operations.

Net income attributable to noncontrolling interest.  Net income attributable to noncontrolling interest for the three months ended March 31, 2010 was $15.4 million, as compared to $3.8 million for the same period of 2009.  The $11.6 million increase in net income attributable to noncontrolling interest is primarily due to an increase in Pioneer Southwest’s net income during the three months ended March 31, 2010, as compared to the three months ended March 31, 2009, and an increase in noncontrolling ownership in Pioneer Southwest during the fourth quarter of 2009. See Note B of Notes to Consolidated Financial Statements included in "Item 1. Financial Statements" for additional information regarding Pioneer Southwest and the Company's n oncontrolling interest in consolidated subsidiaries' net income.

Capital Commitments, Capital Resources and Liquidity

Capital commitments. The Company's primary needs for cash are for capital expenditures and acquisition expenditures on oil and gas assets, payment of contractual obligations, dividends/distributions and working capital obligations. Funding for these cash needs, as well as funding for any stock or debt repurchases that the Company may undertake, may be provided by any combination of internally-generated cash flow, proceeds from the disposition of nonstrategic assets or external financing sources as discussed in "Capital resources" below. The Company expects that it will be able to fund its needs for cash (excluding acquisitions) with internally-generated cash flows and with its liquidity under its credit facility. Although the Company expects that internal oper ating cash flows will be adequate to

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PIONEER NATURAL RESOURCES COMPANY

fund capital expenditures and dividend/distribution payments, and that available borrowing capacity under the Company's credit facility will provide adequate liquidity to fund other needs, no assurances can be given that such funding sources will be adequate to meet the Company's future needs.

The Company intends to limit its capital expenditures to a level that allows the Company to deliver net cash flow from operating activities in excess of capital requirements in order to enhance and preserve financial flexibility. The Company expects its 2010 capital expenditures to be approximately $900 million (excluding acquisitions, effects of asset retirement obligations, capitalized interest, geological and geophysical administrative costs and the impacts of an expected Eagle Ford Shale ramp up in drilling activity). An updated capital expenditure forecast for 2010 will be provided once the result of the Eagle Ford Shale joint venture process is announced. During the first quarter of 2010, the Company's capital costs (excluding acquisitions, effects of asset retirement obligations, capitalized interest and geological and geophysi cal administrative costs) were $157.0 million, as compared to $108.1 million during the first quarter of 2009.

Investing activities. Investing activities used $166.5 million of cash during the three months ended March 31, 2010, as compared to $171.1 million used during the three months ended March 31, 2009.  The $4.6 million decrease in net cash used in investing activities is primarily due to a $34.8 million increase in proceeds from disposition of assets and an $8.0 million decrease in additions to oil and gas properties, partially offset by a $38.3 million increase in additions to other assets and other property and equipment. During the three months ended March 31, 2010 and 2009, the Company's expenditures for additions to oil and gas properties were funded by net cash provided by operating activities.

The increase in other property and equipment includes the purchase of four drilling rigs and deposits on four additional rigs to be acquired during the second or third quarter of 2010.  During the first quarter of 2010, the Company formed a majority-owned subsidiary to acquire the drilling rigs and to conduct drilling activities for the Company in the Spraberry field in West Texas.

As referred to above, the Company is also seeking a joint venture partner for a portion of its Eagle Ford Shale acreage position.  The Company expects to receive bids from potential joint venture partners in May 2010 and to announce the result of the joint venture process by the end of the second quarter. There is no assurance that a joint venture agreement can be completed on terms acceptable to the Company.

Dividends/distributions.  During February 2010 and 2009, the Company's board of directors ("the Board") declared semiannual dividends of $0.04 per common share. Associated therewith, the Company paid $4.7 million of aggregate dividends during each of April 2010 and 2009. Future dividends are at the discretion of the Board, and, if declared, the Board may change the current dividend amount based on the Company's liquidity and capital resources at the time.

During January 2010 and 2009, the Pioneer Southwest board of directors ("Pioneer Southwest Board") declared quarterly distributions of $0.50 per limited partner unit. Associated therewith, Pioneer Southwest paid aggregate distributions to noncontrolling unitholders of $6.3 million and $4.7 million in February 2010 and 2009, respectively.  Future distributions are at the discretion of the Pioneer Southwest Board, and, if declared, the Pioneer Southwest Board may change the current distribution amount based on Pioneer Southwest's liquidity and capital resources at the time.

Contractual obligations, including off-balance sheet obligations. The Company's contractual obligations include long-term debt, operating leases, drilling commitments, derivative obligations, other liabilities, transportation commitments and VPP obligations. From time-to-time, the Company enters into off-balance sheet arrangements and transactions that can give rise to material off-balance sheet obligations of the Company. As of March 31, 2010, the material off-balance sheet arrangements and transactions that the Company has entered into included (i) undrawn letters of credit, (ii) operating lease agreements, (iii) drilling and transportation commitments, (iv) VPP obligations (to physically deliver volumes and pay related lease operating expenses in the futur e) and (v) contractual obligations for which the ultimate settlement amounts are not fixed and determinable, such as derivative contracts that are sensitive to future changes in commodity prices or interest rates. Other than the off-balance sheet arrangements described above, the Company has no transactions, arrangements or other relationships with unconsolidated entities or other persons that are reasonably likely to materially affect the Company's liquidity or availability of or requirements for capital resources. Since December 31, 2009, the material changes in the Company's contractual obligations included a $113.4 million decrease in outstanding long-term borrowings, a $22.5 million decrease in the Company's VPP obligations, a $262.8 million increase in the Company's net derivative assets and a decrease of $10.3 million in the Company's rig commitments.

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PIONEER NATURAL RESOURCES COMPANY

In accordance with GAAP, the Company periodically measures and records certain assets and liabilities at fair value. The assets and liabilities that the Company periodically measures and records at fair value include trading securities, deferred compensation plan assets, commodity derivative contracts and interest rate derivative contracts. See Note D of Notes to Consolidated Financial Statements included in "Item 1. Financial Statements" for additional information regarding these assets and liabilities and the valuation techniques used to measure their fair values.

The Company's commodity and interest rate derivative contracts that are periodically measured and recorded at fair value represent those derivatives that continue to be subject to market or credit risk. As of March 31, 2010, these contracts represented net assets of $105.5 million, including $13.5 million of terminated hedge liabilities that are no longer subject to market risk. The ultimate liquidation value of the Company's commodity and interest rate derivatives that are subject to market risk will be dependent upon actual future commodity prices and interest rates, which may differ materially from the inputs used to determine the derivatives' fair values as of March 31, 2010. See Note G of Notes to Consolidated Financial Statements included in "Item 1. Financial Statements" and "Item 3. Quantitative and Qualitative Disclosures Abo ut Market Risk" for additional information about the Company's derivative instruments and market risk.

Capital resources.The Company's primary capital resources are net cash provided by operating activities, proceeds from sales of nonstrategic assets and proceeds from financing activities (principally borrowings under the Company's credit facility). If internal cash flows do not meet the Company's expectations, the Company may further reduce its level of capital expenditures, reduce dividend payments, and/or fund a portion of its capital expenditures using borrowings under its credit facility, issuances of debt or equity securities or from other sources, such as asset sales.

Operating activities.  Net cash provided by operating activities during the three month period ended March 31, 2010 was $299.4 million, as compared to $24.4 million during the three months ended March 31, 2009.  The increase in net cash provided by operating activities for the three month period ended March 31, 2010 is primarily due to increases in oil, NGL and gas prices from continuing operations, decreases in production costs and working capital changes, partially offset by a decrease in commodity sales volumes.

Asset divestitures. During March 2010, the Company sold a portion of its Uinta/Piceance properties and other assets for net proceeds of $10.6 million. During the first quarter of 2010, the Company also received $24.4 million from the Tunisian national oil company as contractual reimbursement of past capital costs incurred in Tunisia.

Financing activities.  Net cash used in financing activities for the three months ended March 31, 2010 was $125.6 million, as compared to $142.8 million of net cash provided by financing activities during the three months ended March 31, 2009.  The $268.4 million increase in cash used by financing activities during the three months ended March 31, 2010, as compared to the three months ended March 31, 2009, is primarily due to a $205.3 million increase in payments on long-term debt and an $84.8 million decrease in long-term borrowings, partially offset by reduced treasury stock purchases under the Company's repurchase program and a net increase in excess tax benefits from share-based payment arrangements.

On March 15, 2010, the Company redeemed for cash all of its outstanding 5.875% senior notes due 2012 for a price equal to the principal amount plus accrued and unpaid interest.  Associated therewith, the Company paid $6.3 million.

As the Company pursues its strategy, it may utilize various financing sources, including, to the extent available, fixed and floating rate debt, convertible securities, preferred stock or common stock. The Company may also issue securities in exchange for oil and gas properties, stock or other interests in other oil and gas companies or related assets. Additional securities may be of a class preferred to common stock with respect to such matters as dividends and liquidation rights and may also have other rights and preferences as determined by the Board.

Liquidity. The Company's principal sources of short-term liquidity are cash on hand and unused borrowing capacity under its credit facility. As of March 31, 2010, the Company had $125 million of outstanding borrowings under its credit facility.  Including $104.2 million of undrawn and outstanding letters of credit under its credit facility, the Company had approximately $1.3 billion of unused borrowing capacity as of March 31, 2010. If internal cash flows do not meet the Company's expectations, the Company may reduce its level of capital expenditures, reduce dividend payments, and/or fund a portion of its capital expenditures using borrowings under its credit facility, issuances of debt or equity securities or from other sources, such as asset sales. The Company cannot provide any assurance that needed short-term or long-term liquidity will be available on acceptable terms or at all. Although the Company expects that internal cash flows will be adequate to fund capital expenditures and dividend payments, and

44

PIONEER NATURAL RESOURCES COMPANY

that available borrowing capacity under the Company's credit facility will provide adequate liquidity, no assurances can be given that such funding sources will be adequate to meet the Company's future needs. For instance, the amount that the Company may borrow under the credit facility in the future could be reduced as a result of lower oil, NGL or gas prices, among other items.

Debt ratings. The Company receives debt credit ratings from Standard & Poor's Ratings Group, Inc. ("S&P") and Moody's, which are subject to regular reviews. S&P's rating for the Company is BB+ with a stable outlook. Moody's rating for the Company is Ba1 with a negative outlook. The Company believes that S&P and Moody's consider many factors in determining the Company's ratings including: production growth opportunities, liquidity, debt levels, asset composition and proved reserve mix. A reduction in the Company's debt ratings could negatively impact the Company's ability to obtain additional financing or the interest rate, fees and other terms associated with such additional financing. As of March 31, 2010, the Company was in compliance wi th all of its debt covenants.

Book capitalization and current ratio.  The Company's net book capitalization at March 31, 2010 was $6.5 billion, consisting of $34.5 million of cash and cash equivalents, debt of $2.6 billion and stockholders' equity of $3.9 billion.  The Company's net debt to net book capitalization was 40 percent and 43 percent at March 31, 2010 and December 31, 2009, respectively.  The Company's ratio of current assets to current liabilities was 1.13 to 1.00 at March 31, 2010 as compared to 1.08 to 1.00 at December 31, 2009.

New accounting pronouncements.   The effects of new accounting pronouncements are discussed in Note B of Notes to Consolidated Financial Statements included in "Item 1. Financial Statements."

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PIONEER NATURAL RESOURCES COMPANY

Item 3.          Quantitative and Qualitative Disclosures About Market Risk

The following quantitative and qualitative disclosures about market risk are supplementary to the quantitative and qualitative disclosures provided in the Company's Annual Report on Form 10-K for the year ended December 31, 2009.  As such, the information contained herein should be read in conjunction with the related disclosures in the Company's Annual Report on Form 10-K for the year ended December 31, 2009.

The primary objective of the following information is to provide forward-looking quantitative and qualitative information about the Company's potential exposure to market risks. The term "market risks", insofar as it relates to currently anticipated transactions of the Company, refers to the risk of loss arising from changes in commodity prices, foreign exchange rates and interest rates. These disclosures are not meant to be precise indicators of expected future losses, but rather indicators of reasonably possible losses. This forward-looking information provides indicators of how the Company views and manages ongoing market risk exposures. All of the Company's market risk sensitive instruments are entered into for purposes other than speculative.

The following table reconciles the changes that occurred in the fair values of the Company's open derivative contracts during the three months ending 2010:

	Derivative Contract Net Assets (Liabilities) (a)
	Commodities		Interest Rates		Total
	(in thousands)
Fair value of contracts outstanding as of December 31, 2009	$	(121,562)	$	(17,841)	$	(139,403)
Changes in contract fair value (b)		255,219		10,257		265,476
Contract maturities		(7,247)		150		(7,097)
Fair value of contracts outstanding as of March 31, 2010	$	126,410	$	(7,434)	$	118,976

_____________

(a)	Represents the fair values of open derivative contracts subject to market risk. The Company also had $13.5 million and $17.9 million of obligations under terminated derivatives as of March 31, 2010 and December 31, 2009, respectively, for which no market risk exists.
(b)	At inception, new derivative contracts entered into by the Company had no intrinsic value.

Interest rate sensitivity. See Note F of Notes to Consolidated Financial Statements included in "Item 1. Financial Statements" and Capital Commitments, Capital Resources and Liquidity included in "Item 2. Management's Discussion and Analysis of Financial Condition and Results of Operations" for information regarding debt transactions.

The following table provides information about financial instruments to which the Company was a party as of March 31, 2010 and that are sensitive to changes in interest rates. For debt obligations, the table presents maturities by expected maturity dates, the weighted average interest rates expected to be paid on the debt given current contractual terms and market conditions and the debt's estimated fair value. For fixed rate debt, the weighted average interest rate represents the contractual fixed rates that the Company was obligated to periodically pay on the debt as of March 31, 2010. For variable rate debt, the average interest rate represents the average rates being paid on the debt projected forward proportionate to the forward yield curve for LIBOR on May 3, 2010.

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PIONEER NATURAL RESOURCES COMPANY

			Nine Months Ending December 31,		Year Ending December 31,												Liability Fair Value at March 31,
			2010		2011		2012		2013		2014		Thereafter		Total		2010
			($ in thousands)
Total Debt:
		Fixed rate principal
		maturities (a)	$	-	$	-	$	-	$	480,000	$	-	$	2,089,985	$	2,569,985	$	2,626,046
		Weighted average
		interest rate		6.05%		6.05%		6.05%		5.53%		5.51%		7.07%
	Variable rate principal
		maturities:
		Pioneer Natural Resources
		credit facility	$	-	$	-	$	125,000	$	-	$	-	$	-	$	125,000	$	141,638
		Weighted average
		interest rate		2.66%		3.65%		4.81%
		Pioneer Southwest
		credit facility	$	-	$	-	$	-	$	69,000	$	-	$	-	$	69,000	$	64,142
		Weighted average
		interest rate		1.54%		2.52%		3.68%		4.53%
Interest Rate Swaps (b):
		Credit facility:
		Notional debt amount (c)	$	189,000	$	23,625											$	4,357
		Fixed rate payable (%)		3.00%		3.00%
		Variable rate receivable (%)		0.58%		1.74%
		Notional debt amount (c)	$	460,000	$	460,000	$	460,000	$	460,000	$	460,000	$	460,000			$	3,077
		Fixed rate receivable (%)		2.91%		2.91%		2.91%		2.91%		2.91%		2.91%
		Variable rate payable (%)		0.66%		1.65%		2.80%		3.66%		4.03%		4.01%

_____________

(a)	Represents maturities of principal amounts excluding (i) debt issuance discounts and premiums and (ii) net deferred fair value hedge losses.
(b)	Subsequent to March 31, 2010, the Company entered into $10 million notional amount of fixed-for-variable interest rate derivatives at a weighted average fixed annual rate of 3.35 percent and a termination date of March 2017.
(c)	Represents weighted average notional contract amounts of interest rate derivatives.

Commodity price sensitivity. The following tables provide information about the Company's oil, NGL and gas derivative financial instruments that were sensitive to changes in oil, NGL and gas prices as of March 31, 2010. Although mitigated by the Company's derivative activities, declines in commodity prices would reduce the Company's revenues and internally-generated cash flows.

Commodity derivative instruments. The Company manages commodity price risk with derivative contracts, such as swap contracts, collar contracts, collar contracts with short put options and NGL percentage of oil index contracts. Swap contracts provide a fixed price for a notional amount of sales volumes. Collar contracts provide minimum ("floor") and maximum ("ceiling") prices on a notional amount of sales volumes, thereby allowing some price participation if the relevant index price closes above the floor price. Collar contracts with short put options differ from other collar contracts by virtue of the short put option price, below which the Company's realized price will exceed the variable market prices by the long put-to-short put price differential. NGL perc entage of oil index contracts stabilize the NGL-to-NYMEX oil differential on notional NGL contract volumes.

See Note G of Notes to Consolidated Financial Statements included in "Item 1. Financial Statements" for a description of the accounting procedures followed by the Company relative to its derivative financial instruments and for specific information regarding the terms of the Company's derivative financial instruments that are sensitive to changes in oil, NGL or gas prices.

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PIONEER NATURAL RESOURCES COMPANY

				Nine Months Ending December 31,										Asset (Liability) Fair Value at March 31,
						Year Ending December 31,
				2010		2011		2012		2013		2014		2010
														(in thousands)
Oil Derivatives (a):
	Average daily notional Bbl volumes:
		Swap contracts			2,500		750		3,000		3,000		-	$	(10,511)
			Weighted average fixed price per Bbl	$	93.34	$	77.25	$	79.32	$	81.02	$	-
		Collar contracts			-		2,000		-		-		-	$	22,752
			Weighted average ceiling price per Bbl	$	-	$	170.00	$	-	$	-	$	-
			Weighted average floor price per Bbl	$	-	$	115.00	$	-	$	-	$	-
		Collar contracts with short puts			27,084		37,000		15,000		1,250		-	$	(81,625)
			Weighted average ceiling price per Bbl	$	83.86	$	99.22	$	118.58	$	111.50	$	-
			Weighted average floor price per Bbl	$	66.90	$	73.92	$	81.00	$	83.00	$	-
			Weighted average short put price per Bbl	$	53.97	$	59.41	$	65.00	$	68.00	$	-
	Average forward NYMEX oil prices (b)			$	91.44	$	94.65	$	95.70	$	96.10	$	-
NGL Derivatives (a):
	Average daily notional Bbl volumes:
		Swap contracts			1,450		750		750		-		-	$	(2,745)
			Weighted average fixed price per Bbl	$	47.73	$	34.65	$	35.03	$	-	$	-
		Collar contracts			2,000		1,000		-		-		-	$	(628)
			Weighted average ceiling price per Bbl	$	49.98	$	50.93	$	-	$	-	$	-
			Weighted average floor price per Bbl	$	41.58	$	42.21	$	-	$	-	$	-
	Average forward Mont Belvieu NGL prices (c)			$	46.09	$	44.73	$	44.40	$	-	$	-
		Percent of WTI oil index contracts			1,782		-		-		-		-	$	2,050
			Percentage of NYMEX WTI received		60%		-		-		-		-
	Average forward NYMEX oil prices (b)			$	91.44	$	-	$	-	$	-	$	-
Gas Derivatives (a):
	Average daily notional MMBtu volumes (b):
		Swap contracts			167,500		97,500		2,500		12,500		-	$	129,484
			Weighted average fixed price per MMBtu	$	6.27	$	6.32	$	6.77	$	6.59	$	-
		Collar contracts			40,000		-		-		-		-	$	17,261
			Weighted average ceiling price per MMBtu	$	7.19	$	-	$	-	$	-	$	-
			Weighted average floor price per MMBtu	$	5.75	$	-	$	-	$	-	$	-
		Collar contracts with short puts			95,000		200,000		190,000		45,000		20,000	$	108,621
			Weighted average ceiling price per MMBtu	$	7.94	$	8.55	$	7.96	$	7.49	$	8.29
			Weighted average floor price per MMBtu	$	6.00	$	6.32	$	6.12	$	6.00	$	6.00
			Weighted average short put price per MMBtu	$	5.00	$	4.88	$	4.55	$	4.50	$	4.50
	Average forward NYMEX gas prices (b)			$	4.45	$	5.44	$	5.92	$	6.21	$	6.48
		Basis swap contracts			279,473		120,000		40,000		10,000		-	$	(58,249)
			Weighted average fixed price per MMBtu	$	(0.62)	$	(0.62)	$	(0.47)	$	(0.71)	$	-
	Average forward basis differential prices (d)			$	(0.22)	$	(0.25)	$	(0.19)	$	(0.34)	$	-

_____________

(a)	Subsequent to March 31, 2010, the Company entered into additional crude collar contracts with short puts for (i) 3,000 Bbls per day of the Company's remaining 2010 production with a ceiling price of $95.50 per Bbl, a floor price of $81.67 per Bbl and a short put price of $66.67 per Bbl and (ii) 12,000 Bbls per day of the Company's 2012 production with a ceiling price of $122.25 per Bbl, a floor price of $80.00 per Bbl and a short put price of $65.00 per Bbl. The Company converted NGL Percentage of WTI Oil Prices contracts to collar contracts with short puts for 2,000 Bbls per day of the Company's remaining 2010 production with a ceiling price of $58.92 per Bbl, a floor price of $47.64 per Bbl and a short put price of $38.71 per Bbl. The Company also entered into (i) gas swap contracts for 5,000 MMBtu per day of the Company's 2012 and 2 013 production at an average price of $5.80 per MMBtu and $6.04 per MMBtu, respectively, and (ii) gas collar contracts with short puts for 30,000 MMBtu per day of the Company's 2014 production with a ceiling price of $7.94 per MMBtu, a floor price of $6.00 per MMBtu and a short put price of $4.50 per MMBtu.
(b)	The average forward NYMEX oil and gas prices are based on May 3, 2010 market quotes.
(c)	Forward Mont Belvieu NGL prices are not available as formal market quotes.  These forward prices represent estimates as of April 30, 2010 provided by third parties who actively trade in the derivatives.
(d)	The average forward basis differential prices are based on May 3, 2010 market quotes for basis differentials between the relevant index prices and NYMEX-quoted forward prices.

48

PIONEER NATURAL RESOURCES COMPANY

Item 4.          Controls and Procedures

Evaluation of disclosure controls and procedures. The Company's management, under the supervision and with the participation of its principal executive officer and principal financial officer, have evaluated, as required by Rule 13a-15(b) under the Securities Exchange Act of 1934 (the "Exchange Act"), the effectiveness of the design and operation of the Company's disclosure controls and procedures (as defined in Exchange Act Rule 13a-15(e)) as of the end of the period covered by this Report. Based on that evaluation, the principal executive officer and principal financial officer concluded that the disclosure controls and procedures are effective in ensuring that information required to be disclosed by the Company 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's rules and forms, including that such information is accumulated and communicated to the Company's management, including the principal executive officer and principal financial officer, as appropriate, to allow timely decisions regarding required disclosure.

Changes in internal control over financial reporting. There have been no changes in the Company's internal control over financial reporting (as defined in Rule 13a-15(f) under the Exchange Act) that occurred during the Company's last fiscal quarter that have materially affected or are reasonably likely to materially affect the Company's internal control over financial reporting.

49

PIONEER NATURAL RESOURCES COMPANY

PART II.  OTHER INFORMATION

Item 1.          Legal Proceedings

The Company is party to the legal proceeding that is described under "Legal actions" in Note J of Notes to Consolidated Financial Statements included in "Item 1. Financial Statements."  The Company is also party to other proceedings and claims incidental to its business.  While many of these other matters involve inherent uncertainty, the Company believes that the amount of the liability, if any, ultimately incurred with respect to such other proceedings and claims will not have a material adverse effect on the Company's consolidated financial position as a whole or on its liquidity, capital resources or future annual results of operations.

Item 1A.       Risk Factors

In addition to the other information set forth in this Report, you should carefully consider the risks discussed in the Company's Annual Report on Form 10-K under the headings "Item 1. Business – Competition, Markets and Regulations", "Item 1A. Risk Factors" and "Item 7A. Quantitative and Qualitative Disclosures About Market Risk", which risks could materially affect the Company's business, financial condition or future results. There has been no material change in the Company's risk factors from those described in the Annual Report on Form 10-K.

Item 2.          Unregistered Sales of Equity Securities and Use of Proceeds

Purchases of Equity Securities by the Issuer and Affiliated Purchasers

The following table summarizes the Company's purchases of treasury stock during the three months ended March 31, 2010:

Period	Total Number of Shares (or Units) Purchased (a)	Average Price Paid per Share (or Unit)		Total Number of Shares (or Units) Purchased As Part of Publicly Announced Plans or Programs	Approximate Dollar Amount of Shares that May Yet Be Purchased under Plans or Programs (b)
January 2010	30,131	$	50.75	-
February 2010	118,980	$	46.94	-
March 2010	116,071	$	50.52	-
Total	265,182	$	48.94	-	$	355,789,018

_____________

(a)	Consists of shares withheld to satisfy tax withholding on employees' share-based awards.
(b)	During 2007, the Board approved a share repurchase program authorizing the purchase of up to $750 million of the Company's common stock.

50

PIONEER NATURAL RESOURCES COMPANY

Item 6.          Exhibits

Exhibits

Exhibit Number		Description
10.1	—	Form of Performance Unit Award Agreement between the Company and each of Scott D. Sheffield and Timothy L. Dove, with respect to awards made under the Company’s 2006 Long-Term Incentive Plan, together with a schedule identifying other substantially identical agreements between the Company and each of its other executive officers and identifying the material differences between each of those agreements and the filed Performance Unit Award Agreement.
10.2	—	Form of Nonstatutory Stock Option Agreement between the Company and Scott D. Sheffield, with respect to awards made under the Company’s 2006 Long Term Incentive Plan, together with a schedule identifying other substantially identical agreements between the Company and each of its other executive officers and identifying the material differences between each of those agreements and the filed Nonstatutory Stock Option Agreement.
31.1 (a)	—	Chief Executive Officer certification under Section 302 of Sarbanes-Oxley Act of 2002.
31.2 (a)	—	Chief Financial Officer certification under Section 302 of Sarbanes-Oxley Act of 2002.
32.1 (b)	—	Chief Executive Officer certification under Section 906 of Sarbanes-Oxley Act of 2002.
32.2 (b)	—	Chief Financial Officer certification under Section 906 of Sarbanes-Oxley Act of 2002.

_____________

(a) Filed herewith.

(b) Furnished herewith.

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PIONEER NATURAL RESOURCES COMPANY

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 hereto duly authorized.

	PIONEER NATURAL RESOURCES COMPANY
Date:          May 6, 2010	By:	/s/ Richard P. Dealy
		Richard P. Dealy
		Executive Vice President and Chief
		Financial Officer
Date:          May 6, 2010	By:	/s/ Frank W. Hall
		Frank W. Hall
		Vice President and Chief
		Accounting Officer

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PIONEER NATURAL RESOURCES COMPANY

Exhibit Index

Exhibit Number		Description
10.1	—	Form of Performance Unit Award Agreement between the Company and each of Scott D. Sheffield and Timothy L. Dove, with respect to awards made under the Company’s 2006 Long-Term Incentive Plan, together with a schedule identifying other substantially identical agreements between the Company and each of its other executive officers and identifying the material differences between each of those agreements and the filed Performance Unit Award Agreement.
10.2	—	Form of Nonstatutory Stock Option Agreement between the Company and Scott D. Sheffield, with respect to awards made under the Company’s 2006 Long Term Incentive Plan, together with a schedule identifying other substantially identical agreements between the Company and each of its other executive officers and identifying the material differences between each of those agreements and the filed Nonstatutory Stock Option Agreement.
31.1 (a)	—	Chief Executive Officer certification under Section 302 of Sarbanes-Oxley Act of 2002.
31.2 (a)	—	Chief Financial Officer certification under Section 302 of Sarbanes-Oxley Act of 2002.
32.1 (b)	—	Chief Executive Officer certification under Section 906 of Sarbanes-Oxley Act of 2002.
32.2 (b)	—	Chief Financial Officer certification under Section 906 of Sarbanes-Oxley Act of 2002.

_____________

(a) Filed herewith.

(b) Furnished herewith.

53

EX-10.1

EXHIBIT 10.1

PERFORMANCE UNIT AWARD AGREEMENT

PIONEER NATURAL RESOURCES COMPANY

2006 LONG TERM INCENTIVE PLAN

________________, 20____

To: Scott D. Sheffield

Pioneer Natural Resources Company, a Delaware corporation (the "Company"), is pleased to grant you an award (the "Award") to receive an aggregate of _________ performance units (each, a “PerformanceUnit”) in respect of the period _________ through ____________ (the “PerformancePeriod”). This award is subject to your acceptance of and agreement to all the applicable terms, conditions and restrictions described in this Performance Unit Award Agreement (the “Agreement”) and the Pioneer Natural Resources Company 2006 Long Term Incentive Plan (as it may be amended from time to time, the “Plan”). A copy of the Plan is available upon request. Except as provided below, to the extent that any provision of this Agreement conflicts with the expressly applicable terms of the Plan, you acknowledge and agree that those terms of the Plan shall control and, if necessary, the applicable provisions of this Agreement shall be deemed amended so as to carry out the purpose and intent of the Plan. Terms that have their initial letters capitalized, but that are not otherwise defined in this Agreement, shall have the meanings given to them in the Plan in effect as of the date of this Agreement. The Performance Units contemplated herein are described in the Plan as Restricted Stock Units subject to restrictions that lapse based on the achievement of performance goals pursuant to Section 6(a)(i) of the Plan.

This Agreement sets forth the terms of the agreement between you and the Company with respect to the Performance Units. By accepting this Agreement, you agree to be bound by all of the terms hereof.

1.     Overview of Performance Units.

(a)Performance Units Generally. Each Performance Unit represents a contractual right to receive one share of the Company’s common stock (the “Common Stock”), subject to the terms and conditions of this Agreement; provided that, based on the relative achievement against each Performance Objective (as defined below), the number of shares of Common Stock that may be deliverable hereunder in respect of the Performance Units may range from __% to ___% of the number of Performance Units stated in the preamble to this Agreement (such stat ed number of Performance Units hereafter called the “Initial Performance Units”). Your right to receive Common Stock in respect of Performance Units is generally contingent, in whole or in part, upon (i) the achievement of the performance objective outlined in Section 2 below (the “Performance Objective”) and (ii) except as provided in Section 4 or Section 5, your continued employment with the Company or one of its Subsidiaries through the end of the Performance Period.

(b)Dividend Equivalents. With respect to each outstanding Performance Unit, the Company shall credit a book entry account with an amount equal to the amount of any cash dividend paid on one share of Common Stock. The amount credited to such book entry account shall be payable to you at the same time or times, and subject to the same terms and conditions as are applicable to, your Performance Units; provided that, if more than the Initial Performance Units shall become payable in accordance with this Agreement, the maximum amount payable in respect of such dividend equivalents shall be the amount credited to your book entry accou nt. Dividends and distributions payable on Common Stock other than in cash will be addressed in accordance with Section 8 hereof.

2.Total Shareholder Return Objective. The Performance Objective with respect to the Initial Performance Units is based on Total Shareholder Return. Total Shareholder Return shall mean, as to the Company and each of the Peer Companies (as defined below), the annualized rate of return shareholders receive through stock price changes and the assumed reinvestment of dividends paid over the Performance Period. Dividends per share paid other than in the form of cash shall have a value equal to the amount of such dividends reported by the issuer to its shareholders for purposes of Federal income taxation. For purpose s of determining the Total Shareholder Return for the Company and each of the Peer Companies, the change in the price of the Company’s Common Stock and of the common stock of each Peer Company, as the case may be, shall be based upon the average of the closing stock prices of the Company and such Peer Company on each trading day in the ___-day period preceding each of the start (the “Initial Value”) and the end (the “Closing Value”) of the Performance Period. The Initial Value of the Common Stock to be used to determine Total Shareholder Return over the Performance Period is $______ per share. Achievement with respect to this Performance Objective shall be determined based on the Company’s relative ranking in respect of the Performance Period with regard to Total Share holder Return as compared to Total Shareholder Return of the Peer Companies, and shall be determined in accordance with the applicable table as set forth in Appendix A hereto. The applicable table shall be determined based on the number of Peer Companies for the Performance Period. A company shall be a “Peer Company” if it (i) is one of the companies listed on Appendix A hereto and (ii) has a class of common equity securities listed to trade under Section 12(g) of the Securities Exchange Act of 1934, as amended (the “1934 Act”), during each day of the Performance Period. The number of Performance Units, if any, determined to be earned pursuant to the applicable table under Appendix A, as modified pursuant to Section 4(a), Section 4(b) or Section 5, if applicable, shall be referred to “Earned Performance Units”.

3.Conversion of Performance Units; Delivery of Performance Units. Unless an earlier date applies pursuant to Section 4(a), Section 5(c) or Section 6, payment in respect of Earned Performance Units shall be made not later than March 1 of the year following the year in which the Performance Period ends. Unless otherwise determined by the Committee, all payments in respect of Earned Performance Units shall be made in freely transferable shares of Common Stock; provided, however, that if and to the extent that the reservation of the power to settle (as opposed to the act of settling) Performance Units in cash inst ead of shares would result in an additional financial accounting charge for the Company, the Committee shall not have the right to settle such Performance Units other than in the form of Common Stock (or, if applicable, stock of a Successor Corporation (as defined in Section 5)). Neither this Section 3 nor any action

2

taken pursuant to or in accordance with this Section 3 shall be construed to create a trust of any kind. Any shares of Common Stock issued to you pursuant to this Agreement in settlement of Earned Performance Units shall be in book entry form registered in your name. Any fractional Earned Performance Units shall be rounded up to the nearest whole share of Common Stock.

4.    Termination of Employment.

(a)  Death or Disability. In the event that your employment with the Company or a Subsidiary terminates during the Performance Period due to your death or Disability (as such term is defined in the Severance Agreement between you and the Company or one of its subsidiaries), you shall be deemed to have Earned Performance Units equal to the product of (i) and (ii), where (i) and (ii) are:

(i)the Initial Performance Units;

  (ii)a fraction (the “Pro-Ration Fraction”), (A) the numerator of which is the number of full months (counting the month in which your termination of employment occurs as a full month) during the Performance Period during which you were employed and (B) the denominator of which is 36.

Distribution of shares of Common Stock in respect of the Performance Units determined to be earned by reason of this Section 4(a) shall be made not later than 74 days following your death or Disability and shall be in full and complete satisfaction of all of your rights (and the rights of any person who derives his, her or its rights from you) under this Agreement.

(b)Normal Retirement. In the event that your employment with the Company and each of its Subsidiaries by which you are employed terminates during the Performance Period due to your retirement at or after having attained age 60, you shall be deemed to have Earned Performance Units, as of the end of the Performance Period, equal in number to the product of (i) the number of Earned Performance Units that you would have earned in accordance with Section 2 had you remained employed through the end of the Performance Period multiplied by (ii) the Pro-Ration Fraction. Any portion of the Performance Units that cannot become earned and p ayable in accordance with the preceding sentence shall terminate and automatically be cancelled as of the date of your termination of employment. Any portion of your Performance Units that is eligible to be earned pursuant to first sentence of this subparagraph (b), but is not earned as of the end of the Performance Period, shall terminate and be canceled upon the expiration of such Performance Period.

(c)Termination Without Cause or Termination For Good Reason. In the event that your employment with the Company and each of its Subsidiaries by which you are employed is terminated during the Performance Period (x) by the Company and such Subsidiaries and such termination is not a Termination for Cause or (y) by you and such termination is a Termination for Good Reason (as each such term is defined in the Severance Agreement between you and the Company or one of its subsidiaries), then notwithstanding the terms of any such Severance Agreement you shall be deemed to have earned, as of the end of the Performance Period, the number of Earned Performance Units that you would have earned in accordance with Section 2 had you remained employed through the end of the Performance

3

Period. Any portion of your Performance Units that is eligible to be earned pursuant to the preceding sentence, but is not earned as of the end of the Performance Period, shall terminate and be canceled upon the expiration of such Performance Period.

(d)   Other Termination of Employment. Unless otherwise determined by the Committee at or after grant, in the event that your employment with the Company or a Subsidiary terminates prior to the end of the Performance Period for any reason other than those listed in Section 4(a), 4(b) or 4(c), all of your Performance Units shall terminate and automatically be canceled upon such termination of employment.

 5.Change in Control. Notwithstanding the provisions of Section 1 through Section 4 hereof or the terms of any Change in Control Agreement between you and the Company or a Subsidiary (a “CIC Agreement”), if you have been continuously employed from the grant specified above until the date that the Change in Control occurs (the “Change in Control Date”) or you are treated, for purposes of such CIC Agreement, to h ave remained in employment through the Change in Control Date, upon the occurrence of a Change in Control your rights in respect of the Performance Units shall be determined as provided in Section 5(a). If your employment shall have terminated prior to the Change in Control Date, but at least some of your Performance Units remain outstanding pursuant to Section 4(b) or Section 4(c), your rights in respect of your outstanding Performance Units shall be determined as provided in Section 5(b).

 (a)    If a Change in Control occurs, you will be issued a number of shares of Common Stock equal to the number of Performance Units that would have become Earned Performance Units in accordance with the provisions of Section 2 assuming that:

(i)the Performance Period ended on the Change in Control Date and

 (ii)the determination of whether, and to what extent, the Performance Objective is achieved, is based on actual performance against the stated performance criteria through the Change in Control Date.

 (b)If your employment terminated prior to the Change in Control Date, but some or all of your Performance Units are still outstanding on such date pursuant to Section 4(b) or 4(c), then, you shall receive a number of shares of Common Stock equal to the product of (A) the number of shares of Common Stock that would have been issued to you in respect to the Initial Performance Units, determined as though Section 5(a) was applicable to you times (B) the Pro-Ration Fraction.

     (c)Any shares of Common Stock issuable pursuant to this Section 5 shall be issued immediately following (and not later than) 5 business days after the Change in Control Date and shall be fully earned and freely transferable as of the date of the Change in Control. Notwithstanding anything else contained in this Section 5 to the contrary, if the Change in Control involves a merger, reclassification, reorganization or other similar transaction pursuant to which the Common Stock is exchanged for stock of the surviving corporation in such merger, the successor to the corporation or the direct or indirect parent of such a corporation (col lectively, the “Successor Corporation”), then you shall receive, instead of each share of Common Stock otherwise deliverable hereunder, the same consideration (whether stock, cash or

4

other property) payable or distributable in such transaction in respect of a share of Common Stock. Any property distributed pursuant to this Section 5(c), whether in shares of the Successor Corporation or otherwise, shall in all cases be freely transferable without any restriction (other than any such restriction that may be imposed at applicable law), and any securities issued hereunder shall be registered to trade under the 1934 Act, and shall have been registered under the Securities Act of 1933, as amended (the “1933 Act”).

 (d)    Notwithstanding anything else contained in this Section 5 to the contrary, the Committee may elect, at its sole discretion by resolution adopted prior to the Change in Control Date, to satisfy your rights in respect of the Performance Units (as determined pursuant to the foregoing provisions of this Section 5), in whole or in part, by making a cash payment to you within 5 business days of the Change in Control Date in respect of all such Performance Units or such portion of such Performance Units as the Committee shall determine. Any cash payment for any Performance Unit shall be equal to the Fair Market Value of the number o f shares of Common Stock into which it would convert, determined on the Change in Control Date.

6.Nontransferability of Awards. The Performance Units granted hereunder may not be sold, transferred, pledged, assigned, encumbered or otherwise alienated or hypothecated, other than by will or by the laws of descent and distribution. Following your death, any shares distributable (or cash payable) in respect of Performance Units will be delivered or paid, at the time specified in Section 3 or, if applicable, Section 4 or Section 5, to your beneficiary in accordance with, and subject to, the terms and conditions hereof and of the Plan.

7.Beneficiary Designation. You may from time to time name any beneficiary or beneficiaries (who may be named contingently or successively) to whom shall be delivered or paid under this Agreement following your death any shares that are distributable or cash payable hereunder in respect of your Performance Units at the time specified in Section 3 or, if applicable, Section 4 or Section 5. Each designation will revoke all prior designations, shall be in a form prescribed by the Committee, and will be effective only when filed in writing with the Committee during your lifetime. In the absen ce of any such effective designation, shares issuable in connection with your death shall be paid by your surviving spouse, if any, or otherwise to your estate.

8.   Adjustments in Respect of Performance Units. In the event of any common stock dividend or common stock split, recapitalization (including, but not limited to, the payment of an extraordinary dividend), merger, consolidation, combination, spin-off, distribution of assets to stockholders (other than cash dividends), exchange of shares, or other similar corporate change with regard to the Company or any Peer Company, appropriate adjustments shall be made by the Committee to the Initial Value of the corresponding common stock, and, if any such event occurs with respect to the Company, in the aggregate number of Performance Units subject to this Agreement. The Committee’s determination with respect to any such adjustment shall be conclusive.

9.Effect of Settlement. Upon conversion into shares of Common Stock (or Successor Corporation common stock) pursuant to Section 3 or Section 5, a cash settlement of your rights, at the election of the Committee at its sole discretion pursuant to Section 3 or Section

5

5(d), or a combination of the issuance of Common Stock and the payment of cash in accordance with any applicable provisions of this Agreement, all of your Performance Units subject to the Award shall be cancelled and terminated. If and to the extent that you are still employed at the end of the Performance Period, and none of your Performance Units shall have become earned in accordance with the terms of this Agreement, all such Performance Units subject to the Award shall be cancelled and terminated.

 10.Furnish Information. You agree to furnish to the Company all information requested by the Company to enable it to comply with any reporting or other requirements imposed upon the Company by or under any applicable statute or regulation.

 11.Remedies. The parties to this Agreement shall be entitled to recover from each other reasonable attorneys' fees incurred in connection with the enforcement of the terms and provisions of this Agreement whether by an action to enforce specific performance or for damages for its breach or otherwise. If, due to Section 4 of the Plan, the Company fails or is unable to make the payment in respect of Earned Performance Units in freely transferable shares of Common Stock, and the Committee does not elect to settle such Earned Performance Units in cash instead of shares, as provided by Section 3 of this Agreement, as your sole and exclu sive remedy for such failure, in addition to the rights provided under the first sentence of this Section 11, the Company shall pay to you an amount in cash equal to the product of the number of Earned Performance Units times the Fair Market Value of one share of Common Stock. The Company shall make such payment to you within ten (10) days following receipt of your written demand therefor, but in no event later than March 15 of the year following the year in which the Performance Period ends, subject to compliance with any tax withholding obligations that the Company in its discretion deems to be necessary with respect to such payment. Upon such payment pursuant to this Section 11, all of your Performance Units subject to the Award shall be cancelled and terminated. For purposes of this Section 11, the Fair Market Value of one share of Common Stock shall be determined as follows:

(a)with respect to a payment in respect of Earned Performance Units pursuant to Section 3, the Fair Market Value shall be determined as of the last day of the Performance Period;

(b)with respect to a payment in respect of Earned Performance Units where payment arises due to the termination of your employment with the Company or a Subsidiary during the Performance Period due to your death or Disability pursuant to Section 4(a), the Fair Market Value shall be determined as of the date your employment terminates due to death or Disability, as applicable;

(c)with respect to a payment in respect of Earned Performance Units where payment arises due to the termination of your employment with the Company or a Subsidiary during the Performance Period due to your retirement pursuant to Section 4(b), or due to your termination by the Company that is not a Termination for Cause or to your termination by you that is a Termination for Good Reason pursuant to Section 4(c), the Fair Market Value shall bedetermined as of the last day of the Performance Period;

6

(d)with respect to a payment based on the number of Performance Units that would have become Earned Performance Units in connection with a Change in Control pursuant to Section 5, the Fair Market Value shall be determined as of the Change in Control Date.

 12.Information Confidential. As partial consideration for the granting of the Award hereunder, you hereby agree with the Company that you will keep confidential all information and knowledge, except that which has been disclosed in any public filings required by law, that you have relating to the terms and conditions of this Agreement; provided, however, that such information may be disclosed as required by law and may be given in confidence to your spouse, tax and financial advisors, or to a financial institution to the extent that such information is necessary to secure a loan. In the event any breach of this promise comes to the attention of the Company, it shall take into consideration that breach in determining whether to recommend the grant of any future similar award to you, as a factor militating against the advisability of granting any such future award to you.

 13.Payment of Taxes. The Company may from time to time require you to pay to the Company (or the Company's Subsidiary if you are an employee of a Subsidiary of the Company) the amount that the Company deems necessary to satisfy the Company's or its Subsidiary's current or future obligation to withhold federal, state or local income or other taxes that you incur as a result of the Award. With respect to any required tax withholding, unless another arrangement is permitted by the Company in its discretion, the Company shall withhold from the shares of Common Stock to be issued to you the number of shares necessary to satisfy the Comp any's obligation to withhold taxes, that determination to be based on the shares' Fair Market Value, as defined in the Plan, at the time as of which such determination is made. In the event the Company subsequently determines that the aggregate Fair Market Value, as defined in the Plan, of any shares of Common Stock withheld as payment of any tax withholding obligation is insufficient to discharge that tax withholding obligation, then you shall pay to the Company, immediately upon the Company's request, the amount of that deficiency.

 14.Right of the Company and Subsidiaries to Terminate Employment. Nothing contained in this Agreement shall confer upon you the right to continue in the employ of the Company or any Subsidiary of the Company, or interfere in any way with the rights of the Company or any Subsidiary of the Company to terminate your employment at any time.

 15.No Liability for Good Faith Determinations. Neither the Company nor the members of the Board and the Committee shall be liable for any act, omission or determination taken or made in good faith with respect to this Agreement or the Performance Units granted hereunder.

 16.No Guarantee of Interests. The Board and the Company do not guarantee the Common Stock of the Company from loss or depreciation.

 17.Company Records. Records of the Company or its Subsidiaries regarding your period of employment, termination of employment and the reason therefor, leaves of absence, re-employment, and other matters shall be conclusive for all purposes hereunder, unless determined by the Company to be incorrect.

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 18.Severability. If any provision of this Agreement is held to be illegal or invalid for any reason, the illegality or invalidity shall not affect the remaining provisions hereof, but such provision shall be fully severable and this Agreement shall be construed and enforced as if the illegal or invalid provision had never been included herein.

 19.Notices. Whenever any notice is required or permitted hereunder, such notice must be in writing and personally delivered or sent by mail. Any such notice required or permitted to be delivered hereunder shall be deemed to be delivered on the date on which it is personally delivered, or, whether actually received or not, on the third Business Day after it is deposited in the United States mail, certified or registered, postage prepaid, addressed to the person who is to receive it at the address which such person has theretofore specified by written notice delivered in accordance herewith. The Company or you may change, at any time and from time to time, by written notice to the other, the address which it or he had previously specified for receiving notices.

The Company and you agree that any notices shall be given to the Company or to you at the following addresses:

Company:               Pioneer Natural Resources Company

Attn: Corporate Secretary

5205 N. O’Connor Boulevard, Suite 200

Irving, Texas 75039-3746

Holder:                   At your current address as shown in the Company's records.

20.Waiver of Notice. Any person entitled to notice hereunder may waive such notice in writing.

 21.Successor. This Agreement shall be binding upon you, your legal representatives, heirs, legatees and distributees, and upon the Company, its successors and assigns.

 22.Headings The titles and headings of Sections are included for convenience of reference only and are not to be considered in construction of the provisions hereof.

 23.Governing Law. All questions arising with respect to the provisions of this Agreement shall be determined by application of the laws of the State of Delaware except to the extent Delaware law is preempted by federal law. The obligation of the Company to sell and deliver Common Stock hereunder is subject to applicable laws and to the approval of any governmental authority required in connection with the authorization, issuance, sale, or delivery of such Common Stock.

 24.Execution of Receipts and Releases. Any payment of cash or any issuance or transfer of shares of Common Stock or other property to you, or to your legal representative, heir, legatee or distributee, in accordance with the provisions hereof, shall, to the extent thereof, be in full satisfaction of all claims of such Persons hereunder. The Company may require you or your legal representative, heir, legatee or distributee, as a condition precedent to such payment or issuance, to execute a release and receipt therefor in such form as it shall determine.

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 25.Amendment. This Agreement may be amended at any time unilaterally by the Company provided that such amendment is consistent with all applicable laws and does not reduce any rights or benefits you have accrued pursuant to this Agreement. This Agreement may also be amended at any time unilaterally by the Company to the extent the Company believes in good faith that such amendment is necessary or advisable to bring this Agreement into compliance with any applicable laws, including Section 409A of the Code.

 26.The Plan. This Agreement is subject to all the terms, conditions, limitations and restrictions contained in the Plan; provided, however, that notwithstanding anything to the contrary herein, any provision of this Agreement that is inconsistent with the provisions of Section 9(c), (e), and (f) of the Plan shall control over such provisions of the Plan.

 27.Agreement Respecting Securities Act of 1933. You represent and agree that you will not sell the Common Stock that may be issued to you pursuant to your Performance Units except pursuant to an effective registration statement under the 1933 Act or pursuant to an exemption from registration under the 1933 Act (including Rule 144).

 28.No Shareholder Rights. The Performance Units granted pursuant to this Agreement do not and shall not entitle you to any rights as a shareholder of Common Stock until such time as you receive shares of Common Stock pursuant to this Agreement. Your rights with respect to the Performance Units shall remain forfeitable at all times prior to the date on which rights become earned in accordance with this Agreement.

 29.Electronic Delivery and Acknowledgement. No signature by you is required to accept the award represented by this Agreement. By your acceptance of this award, you are acknowledging that you have received and read, understood and accepted all the terms, conditions and restrictions of this Agreement and the Plan. The Company may, in its sole discretion, deliver any documents related to this award and this Agreement, or other awards that have been or may be awarded under the Plan, by electronic means, including prospectuses, proxy materials, annual reports and other related documents, and the Company may, in its sole discretion, eng age a third party to effect the delivery of these documents on its behalf and provide other administrative services related to this award and the Plan. By your acceptance of the award represented by this Agreement, you consent to receive such documents by electronic delivery and to the engagement of any such third party.

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Appendix A

Determination of Performance Units Earned

Peer Companies:

In addition, if and solely to the extent that at the end of the Performance Period the number of companies listed above that qualify as Peer Companies is less than ____, then such number of the following additional companies (selected in the order presented below) as is necessary to have ____ Peer Companies shall be treated as though Peer Companies for the entire Performance Period, provided that each such additional company satisfies the requirement to be a Peer Company throughout the Performance Period. If, after adding all eligible alternative companies, the number of companies qualifying as Peer Companies for the Performance Period is less than _____, the Committee shall, in good faith, determine the percentage of the Performance Units earned in a manner consistent with the requirements to qualify the Performance Units as perf ormance-based compensation exempt from the limitations imposed by Section 162(m) of the Internal Revenue Code of 1986, as amended.

Alternate Peer Companies:

Rank Against Peers	___ Peer Companies Percentage of Initial Performance Units Earned	___ Peer Companies Percentage of Initial Performance Units Earned	__ Peer Companies Percentage of Initial Performance Units Earned	__ Peer Companies Percentage of Initial Performance Units Earned	__ Peer Companies Percentage of Initial Performance Units Earned
1 2 3 4 5 6 7 8 9 10 11 12

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Schedule I

The document to which this Schedule I is attached is the form of Performance Unit Award Agreement between the Company and Scott D. Sheffield.

1.           The form of Performance Unit Award Agreement between the Company and Scott D. Sheffield and Timothy L. Dove varies from the form between the Company its other executive officers in that Section 4(c) of the form of agreement with the Company’s other executive officers reads in its entirety as follows:

(c)   Termination Without Cause or Termination For Good Reason. In the event that your employment with the Company and each of its Subsidiaries by which you are employed is terminated during the Performance Period (x) by the Company and such Subsidiaries and such termination is not a Termination for Cause or (y) by you and such termination is a Termination for Good Reason (as each such term is defined in the Severance Agreement between you and the Company or one of its subsidiaries), you shall be deemed to have earned, as of the end of the Performance Period, that number of Performance Units equal to the product of (i) the number of Earned Performance Units that you would have earned in accordance with Secti on 2 had you remained employed through the end of the Performance Period multiplied by (ii) the Pro-Ration Fraction. Any portion of the Performance Units that cannot become earned and payable in accordance with the preceding sentence shall terminate and automatically be cancelled as of the date of your termination of employment. Any portion of your Performance Units that is eligible to be earned pursuant to the second preceding sentence, but is not earned as of the end of the Performance Period, shall terminate and be canceled upon the expiration of such Performance Period.

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EX-10.2

EXHIBIT 10.2

NONSTATUTORY STOCK OPTION AGREEMENT

PIONEER NATURAL RESOURCES COMPANY

2006 LONG TERM INCENTIVE PLAN

________________, 20____

To: Scott D. Sheffield

Pioneer Natural Resources Company, a Delaware corporation (the “Company”), is pleased to grant you the right and option (the “Option”) to purchase all or any part of an aggregate of __________ shares of common stock, par value $0.01, of the Company (the “Stock”), subject to certain restrictions and on the terms and conditions contained in this Nonstatutory Stock Option Agreement (the “Agreeme nt”) and the Pioneer Natural Resources Company 2006 Long Term Incentive Plan (as amended, the “Plan”). A copy of the Plan is available upon request. Except as provided below, to the extent that any provision of this Agreement conflicts with the expressly applicable terms of the Plan, you acknowledge and agree that those terms of the Plan shall control and, if necessary, the applicable provisions of this Agreement shall be deemed amended so as to carry out the purpose and intent of the Plan. Terms that have their initial letters capitalized, but that are not otherwise defined in this Agreement, shall have the meanings given to them in the Plan in effect as of the date of this Agreement. This Option shall not be treated as an incentive stock option within the meaning of section 422(b) of the Code.

This Agreement sets forth the terms of the agreement between you and the Company with respect to the Option. By accepting this Agreement, you agree to be bound by all of the terms hereof.

1.Purchase Price. The purchase price of Stock purchased pursuant to the exercise of this Option shall be $_____per share, which has been determined to be not less than the Fair Market Value of the Stock at the date of grant of this Option, which is ____________ (the “Date of Grant”). For all purposes of this Agreement, Fair Market Value of Stock shall be determined in accordance with the provisions of the Plan.

2.Vesting and Exercise of Option.

(a)Vesting Date.  Subject to the terms and conditions of this Agreement, this Option will vest and be exercisable, by written notice to the Company at its principal executive office addressed to the attention of its Corporate Secretary (or such other officer or employee of the Company as the Company may designate from time to time), on the third anniversary of the date of this Agreement (the “Vesting Date”); provided, however, that this Option will vest and become exercisable on the Vesting Date only if y ou have been an employee of the Company or of a Subsidiary continuously from the date of this Agreement through the Vesting Date.

(b)Exercise Procedures.  Subject to the relevant provisions and limitations contained herein and in the Plan, you may exercise the Option to purchase all or a portion of the shares that vest and become exercisable on the Vesting Date at any time prior to the termination of the Option pursuant to this Agreement. In no event shall you be entitled to exercise the Option for any shares that are not vested.  Exercise of the Option shall be made by delivery to the Company by you (or another person entitled to exercise the Option as provided hereunder) of (i) an executed “Notice of Stock Option Exercise,” ; and (ii) payment of the aggregate purchase price for shares purchased pursuant to the exercise. If you are on leave of absence for any reason, the Company may, in its sole discretion, determine that you will be considered still in the employ of or providing services for the Company, provided that rights to the Option may, in the discretion of the Company, be limited to the extent to which those rights were earned or vested when the leave of absence began.

(c)Payment of Purchase Price.  The purchase price of shares as to which this Option is exercised shall be paid in full at the time of exercise, at your election, with the approval of the Company, (i) in cash (including check, bank draft or money order payable to the order of the Company), (ii) by delivering or constructively tendering to the Company shares of Stock having a Fair Market Value equal to the purchase price (provided such shares used for this purpose must have been held by you for such minimum period of time as may be established from time to time by the Committee), (iii) if the Stock is readily tradable on a national securities market, through a “cashless exercise” in accordance with a Company-established policy or program for the same, or (iv) any combination of the foregoing. No fraction of a share of Stock shall be issued by the Company upon exercise of an Option or accepted by the Company in payment of the exercise price thereof; rather, you shall provide a cash payment for such amount as is necessary to effect the issuance and acceptance of only whole shares of Stock. Unless and until a certificate or certificates representing such shares shall have been issued by the Company to you, you (or the person permitted to exercise this Option in the event of your death) shall not be or have any of the rights or privileges of a stockholder of the Company with respect to shares acquirable upon an exercise of this Option.

(d)   Expiration Date.  This Option shall not be exercisable in any event after the expiration of ten (10) years from the Date of Grant (the “Expiration Date”).

3.Effect of Change in Control.  Notwithstanding Section 2 of this Agreement, upon the occurrence of a Change in Control, this Option shall become fully vested and exercisable as to all shares covered hereby.

4.Effect of Termination of Employment.  Except as provided below, this Option may be exercised only while you continue to perform services for the Company or any Subsidiary and will terminate and cease to be exercisable upon termination of your service.

(a)Termination By Employee Without Good Reason.

(i) If your employment relationship with the Company or any of its Subsidiaries is terminated voluntarily by you prior to the Vesting Date and such termination is not a Termination for Good Reason (as such term is defined in the Severance Agreement between you and the Company or one of its Subsidiaries), then this Option shall terminate as of the date of such termination and shall never become exercisable.

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(ii)If your employment relationship with the Company or any of its Subsidiaries is terminated voluntarily by you on or after the Vesting Date and such termination is not a Termination for Good Reason, then this Option, to the extent then vested and exercisable, may be exercised by you at any time during the period ending on the earlier to occur of (A) thirty (30) days following such termination, or (B) the Expiration Date.

(b)Termination By The Company For Cause.

(i)If your employment relationship with the Company or any of its Subsidiaries is terminated by the Company prior to the Vesting Date and such termination is a Termination for Cause (as such term is defined in the Severance Agreement between you and the Company or one of its Subsidiaries), then this Option shall terminate as of the date of termination and shall never become exercisable.

(ii)If your employment relationship with the Company or any of its Subsidiaries is terminated by the Company on or after the Vesting Date and such termination is a Termination for Cause, then this Option, to the extent then vested and exercisable, may be exercised by you at any time during the period ending on the earlier to occur of (A) thirty (30) days following such termination, or (B) the Expiration Date.

(c)    Termination By The Company Not For Cause Or By Employee For Good Reason.

(i)Notwithstanding Section 2 of this Agreement, if your employment relationship with the Company and each of its Subsidiaries by which you are employed is terminated prior to the Vesting Date (x) by the Company and such Subsidiaries and such termination is not a Termination for Cause or (y) by you and such termination is a Termination for Good Reason, then this Option shall become fully vested and exercisable as to all shares covered hereby.

(ii)If your employment relationship with the Company and each of its Subsidiaries by which you are employed is terminated (x) by the Company and such Subsidiaries and such termination is not a Termination for Cause or (y) by you and such termination is a Termination for Good Reason, then this Option, to the extent then vested and exercisable (including pursuant to Section 4(c)(i) above), may be exercised by you at any time during the period ending on the earlier to occur of (A) the date that is six (6) months following such termination, or (B) the Expiration Date; provided, that, if any such termination occurs upon or following the occurrence of a Change in Control, then this Option, to the extent then vested and exercisable, may be exercised by you at any time prior to the Expiration Date.

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(d)Other Termination Events.

(i)If your employment relationship with the Company and each of its Subsidiaries by which you are employed is terminated prior to the Vesting Date as a result of any of the following events:

A.your death;

B.your Disability; or

C.your Normal Retirement;

then, notwithstanding Section 2 of this Agreement, this Option shall become vested and exercisable as to a number of shares of Stock equal to the product of (I) the total number of shares of Stock initially subject to this Option times (II) a fraction, the numerator of which is the number of full months (counting the month in which your termination of employment occurs as a full month), beginning with the first full month following the date of this Agreement, during which you were employed by the Company and/or any Subsidiary and the denominator of which is 36; provided, that, if application of the foregoing calculation would result in you becoming vested in a fractional number of shares, the number of vested shares shall be rounded up to the nearest whole share. The por tion, if any, of this Option that thereby becomes vested and exercisable may be exercised by you at any time during the period specified in Section 4(d)(ii) below. The portion, if any, of this Option that does not thereby become vested and exercisable as of the date of the termination of your employment relationship shall terminate as of the date of termination and shall never become exercisable.

(ii)If your employment relationship with the Company and each of its Subsidiaries by which you are employed is terminated for one of the reasons specified in clauses (A) or (B) of Section 4(d)(i) above, then this Option, to the extent then vested and exercisable (including pursuant to Section 4(d)(i) above), may be exercised by you at any time during the period ending on the earlier to occur of (A) the date that is six (6) months following such termination, or (B) the Expiration Date. If your employment relationship with the Company and each of its Subsidiaries by which you are emp loyed is terminated for one of the reasons specified in clause (C) of Section 4(d)(i) above, then this Option, to the extent then vested and exercisable (including pursuant to Section 4(d)(i) above), may be exercised by you at any time prior to the Expiration Date.

(iii)For purposes of this Section 4(d), “Disability” shall have the meaning ascribed to it in the Severance Agreement between you and the Company or one of its Subsidiaries; and “Normal Retirement” shall mean the termination of your employment relationship with the Company and each of its Subsidiaries by which you are employed due to your retirement on or after the date you attain age 60.

5.Adjustment Provisions. In the event there is any change in the Stock by reason of any reorganization, recapitalization, stock split, stock dividend, combination of shares or otherwise, the number of shares associated with this Option shall be adjusted in the manner consistent with the adjustment provisions provided in Section 9(b) and 9(c)(ii) of the Plan.

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6.Transferability. This Option, and any rights or interests therein, will be transferable by you only to the extent permitted pursuant to the terms of Section 10 of the Plan or approved by the Committee.

7.Furnish Information. You agree to furnish to the Company all information requested by the Company to enable it to comply with any reporting or other requirements imposed upon the Company by or under any applicable statute or regulation.

8.Remedies. The parties to this Agreement shall be entitled to recover from each other reasonable attorneys’ fees incurred in connection with the enforcement of the terms and provisions of this Agreement whether by an action to enforce specific performance or for damages for its breach or otherwise. If, due to Section 4 of the Plan, the Company fails or is unable to permit you to exercise all or any part of this Option following your delivery of written notice of exercise to the Company and tender of performance in accordance with this Agreement (which failure shall not be deemed a permitted delay pursua nt to Section 24 of this Agreement), as your sole and exclusive remedy for such failure, in addition to the rights provided under the first sentence of this Section 8, you may require the Company to pay to you an amount in cash equal to the product of (i) the number of shares of Stock with respect to which the Company failed to permit you to exercise your Option, times (ii) the difference of (A) the Fair Market Value of one share of Stock on the date of your exercise minus (B) the purchase price set forth in Section 1 of this Agreement (as adjusted pursuant to this Agreement and the Plan). The Company shall make such payment to you with in ten (10) following receipt of your written demand therefor, subject to compliance with any tax withholding obligations that the Company in its discretion deems to be necessary with respect to such payment. Upon such payment to you, that portion of the Option as to which you tendered a notice of exercise but for which exercise was not permitted shall terminate and cease to be exercisable.

9.Information Confidential. As partial consideration for the granting of the Option hereunder, you hereby agree with the Company that you will keep confidential all information and knowledge, except that which has been disclosed in any public filings required by law, that you have relating to the terms and conditions of this Agreement; provided, however, that such information may be disclosed as required by law and may be given in confidence to your spouse, tax and financial advisors, or to a financial institution to the extent that such information is necessary to secure a loan. In the event any breach of thi s promise comes to the attention of the Company, it shall take into consideration that breach in determining whether to recommend the grant of any future similar award to you, as a factor militating against the advisability of granting any such future award to you.

10.Payment of Taxes.

(a)Withholding Requirement.  The Committee may, in its discretion, require you to pay to the Company at the time of exercise of an Option or thereafter, the amount that the Committee deems necessary to satisfy the Company’s current or future obligation to withhold federal, state or local income or other taxes that you incur by exercising the Option.  In

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connection with such an event requiring tax withholding, you may (i) direct the Company, in the Company’s discretion, to withhold from the shares of Stock to be issued upon exercise the number of shares necessary to satisfy the Company’s obligation to withhold taxes, that determination to be based on the shares’ Fair Market Value as of the date of exercise; (ii) deliver to the Company, in the Company’s discretion, sufficient shares of Stock (based upon the Fair Market Value as of the date of such delivery) to satisfy the Company’s tax withholding obligation; or (iii) deliver sufficient cash to the Company to satisfy its tax withholding obligations.  If you elect to use a Stock withholding feature, you must make the election at the time and in the manner that the Committee prescribes.  The Committee may, at its sole option, deny your request to satisfy withholding obligations through shares of Stock instead of cash.

(b)Deficiency.  If you fail to pay the required amount to the Company and fail to make a Stock withholding election pursuant to Section 10(a)(i) or 10(a)(ii) above, the Company is authorized to withhold from any cash remuneration (or, Stock remuneration, including withholding any shares of Stock distributable to you upon exercise of this Option) then or thereafter payable to you any tax required to be withheld by reason of the exercise of this Option or the disposition of shares of Stock acq uired by exercise of this Option. If the Committee subsequently determines that the aggregate Fair Market Value of any shares of Stock withheld or delivered as payment of any tax withholding obligation is insufficient to discharge that tax withholding obligation, you shall pay to the Company, immediately upon the Committee’s request, the amount of the deficiency in the form of payment requested by the Committee.

11.Right of the Company and Subsidiaries to Terminate Employment. Nothing contained in this Agreement shall confer upon you the right to continue in the employ of the Company or any Subsidiary of the Company, or interfere in any way with the rights of the Company or any Subsidiary of the Company to terminate your employment at any time.

12.No Liability for Good Faith Determinations. Neither the Company nor the members of the Board and the Committee shall be liable for any act, omission or determination taken or made in good faith with respect to this Agreement or the Option granted hereunder.

13.No Guarantee of Interests. The Board and the Company do not guarantee the Stock of the Company from loss or depreciation.

14.Company Records. Records of the Company or its Subsidiaries regarding your period of employment, termination of employment and the reason therefor, leaves of absence, re-employment, and other matters shall be conclusive for all purposes hereunder, unless determined by the Company to be incorrect.

15.Severability. If any provision of this Agreement is held to be illegal or invalid for any reason, the illegality or invalidity shall not affect the remaining provisions hereof, but such provision shall be fully severable and this Agreement shall be construed and enforced as if the illegal or invalid provision had never been included herein.

16.Notices. Whenever any notice is required or permitted hereunder, such notice must be in writing and personally delivered or sent by mail. Any such notice required or permitted to be

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delivered hereunder shall be deemed to be delivered on the date on which it is personally delivered, or, whether actually received or not, on the third Business Day after it is deposited in the United States mail, certified or registered, postage prepaid, addressed to the person who is to receive it at the address which such person has theretofore specified by written notice delivered in accordance herewith. The Company or you may change, at any time and from time to time, by written notice to the other, the address which it or he had previously specified for receiving notices.  The Company and you agree that any notices shall be given to the Company or to you at the following addresses:

Company:               Pioneer Natural Resources Company

Attn: Corporate Secretary

5205 N. O’Connor Boulevard, Suite 200

Irving, Texas 75039-3746

Holder:                    At your current address as shown in the Company’s records.

17.Waiver of Notice. Any person entitled to notice hereunder may waive such notice in writing.

18.Successors. This Agreement shall be binding upon you, your legal representatives, heirs, legatees and distributees, and upon the Company, its successors and assigns.

19.Headings. The titles and headings of Sections are included for convenience of reference only and are not to be considered in construction of the provisions hereof.

20.Governing Law. All questions arising with respect to the provisions of this Agreement shall be determined by application of the laws of the State of Delaware except to the extent Delaware law is preempted by federal law. The obligation of the Company to sell and deliver Stock hereunder is subject to applicable laws and to the approval of any governmental authority required in connection with the authorization, issuance, sale, or delivery of such Stock.

21.Execution of Receipts and Releases. Any payment of cash or any issuance or transfer of shares of Stock or other property to you, or to your legal representative, heir, legatee or distributee, in accordance with the provisions hereof, shall, to the extent thereof, be in full satisfaction of all claims of such Persons hereunder. The Company may require you or your legal representative, heir, legatee or distributee, as a condition precedent to such payment or issuance, to execute a release and receipt therefor in such form as it shall determine.

22.Amendment. This Agreement may be amended at any time unilaterally by the Company, provided that such amendment is consistent with all applicable laws and does not reduce any rights or benefits you have accrued pursuant to this Agreement. This Agreement may also be amended at any time unilaterally by the Company to the extent the Company believes in good faith that such amendment is necessary or advisable to bring this Agreement in compliance with any applicable laws, including Section 409A of the Code.

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23.The Plan. This Agreement is subject to all the terms, conditions, limitations and restrictions contained in the Plan; provided, however, that notwithstanding anything to the contrary herein, any provision of this Agreement that is inconsistent with the provisions of Section 9(c), (e), and (f) of the Plan shall control over such provisions of the Plan.

24.Agreement Respecting Securities Laws.

(a)Notwithstanding any provision of this Agreement to the contrary, the grant of the Option and the issuance of Stock will be subject to compliance with all applicable requirements of federal, state, and foreign securities laws and with the requirements of any stock exchange or market system upon which the Stock may then be listed. The Company may delay the exercise of the Option if the issuance of shares of Stock upon exercise would constitute a violation of any applicable federal, state, or foreign securities laws or other laws or regulations or the requirements of any stock exchange or market system upon which the Stock may then be listed. Until the shares of Stock acquirable upon the exercise of the Option have been registered for issuance under the Securities Act of 1933, as amended (the “Securities Act”), the Company will not issue such shares unless you provide the Company with a written opinion of legal counsel, who shall be satisfactory to the Company, addressed to the Company and satisfactory in form and substance to the Company’s counsel, to the effect that the proposed issuance of such shares to you may be made without registration under the Securities Act. YOU ARE CAUTIONED THAT THE OPTION MAY NOT BE EXERCISED UNLESS THE FOREGOING CONDITIONS ARE SATISFIED. ACCORDINGLY, YOU MAY NOT BE ABLE TO EXERCISE THE OPTION WHEN DESIRED EVEN THOUGH THE OPTION IS VESTED. Except as expressly provided in Section 8 of this Agreement, the inability of the Company to obtain from any regulatory body having jurisdiction the authority, if any, deemed by the Company’s legal counsel to be necessary to the lawful issuance and sale of any shares subject to the Option will relieve the Company of any liability in respect of the failure to issue or sell such shares as to which such requisite authority has not been obtained.  As a condition to the exercise of the Option, the Company may require you to satisfy any qualifications that may be necessary or appropriate to evidence compliance with any applicable law or regulation and to make any representation or warranty with respect to such compliance as may be requested by the Company.

(b)Notwithstanding Section 4(c) or (d), if the exercise of the Option within the applicable time period set forth in Section 4(c) or (d) is prevented by the provisions of Section 24(a) above, the Option will remain exercisable until 30 days after the date you are notified by the Company that the Option is exercisable, but in any event no later than the Expiration Date. The Company makes no re presentation as to the tax consequences of any such delayed exercise. You should consult with your tax advisor as to the tax consequences of any such delayed exercise.

25.Extension in Connection with Section 16.  Notwithstanding Section 4(c) or (d), if a sale within the applicable time periods set forth in Section 4(c) or (d) of shares acquired upon exercise of the Option would subject you to suit under Section 16(b) of the Exchange Act, the Option will remain exercisable until the earliest to occur of (a) the 10th day following the date on which a sale of such shares by you would no longer be subject to such suit, (b) the 190th day after your termination of service with the Company and its Subsidiaries, or (c) the Expiration

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Date. The Company makes no representation as to the tax consequences of any such delayed exercise. You should consult with your tax advisor as to the tax consequences of any such delayed exercise.

26.Status of Stock. You agree that (a) the certificates representing the shares of Stock purchased under this Option may bear such legend or legends as the Committee deems appropriate in order to assure compliance with Section 4 and applicable securities laws, (b) the Company may refuse to register the transfer of the shares of Stock purchased under this Option on the stock transfer records of the Company if such proposed transfer would, in the opinion of counsel satisfactory to the Company, constitute a violation of Section 24 or any applicable securities law, and (c) the Company may give related instructions to its transfer agent, if any, to stop registration of the transfer of the shares of Stock purchased under this Option.

27.Electronic Delivery and Acknowledgement. No signature by you is required to accept the award represented by this Agreement. By your acceptance of this award, you are acknowledging that you have received and read, understood and accepted all the terms, conditions and restrictions of this Agreement and the Plan. The Company may, in its sole discretion, deliver any documents related to this award and this Agreement, or other awards that have been or may be awarded under the Plan, by electronic means, including prospectuses, proxy materials, annual reports and other related documents, and the Company may, in it s sole discretion, engage a third party to effect the delivery of these documents on its behalf and provide other administrative services related to this award and the Plan. By your acceptance of the award represented by this Agreement, you consent to receive such documents by electronic delivery and to the engagement of any such third party.

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Schedule 1

The document to which this Schedule I is attached is the form of Nonstatutory Stock Option Agreement between the Company and each of Scott D. Sheffield and Timothy L. Dove. The form of Nonstatutory Stock Option Agreement between the Company and its other executive officers varies from this form as follows:

1.  The form of Nonstatutory Stock Option Agreement between the Company and its other executive officers varies from this form by modifying Section 4 to provide, in its entirety, the following:

4.           Effect of Termination of Employment.  Except as provided below, this Option may be exercised only while you continue to perform services for the Company or any Subsidiary and will terminate and cease to be exercisable upon termination of your service.

(a)           Termination By Employee Without Good Reason.

 (i)           If your employment relationship with the Company or any of its Subsidiaries is terminated voluntarily by you prior to the Vesting Date and such termination is not a Termination for Good Reason (as such term is defined in the Severance Agreement between you and the Company or one of its Subsidiaries), then this Option shall terminate as of the date of such termination and shall never become exercisable.

 (ii)           If your employment relationship with the Company or any of its Subsidiaries is terminated voluntarily by you on or after the Vesting Date and such termination is not a Termination for Good Reason, then this Option, to the extent then vested and exercisable, may be exercised by you at any time during the period ending on the earlier to occur of (A) thirty (30) days following such termination, or (B) the Expiration Date.

(b)           Termination By The Company For Cause.

 (i)           If your employment relationship with the Company or any of its Subsidiaries is terminated by the Company prior to the Vesting Date and such termination is a Termination for Cause (as such term is defined in the Severance Agreement between you and the Company or one of its Subsidiaries), then this Option shall terminate as of the date of termination and shall never become exercisable.

 (ii)           If your employment relationship with the Company or any of its Subsidiaries is terminated by the Company on or after the Vesting Date and such termination is a Termination for Cause, then this Option, to the extent then vested and exercisable, may be exercised by you at any time during the period ending on the earlier to occur of (A) thirty (30) days following such termination, or (B) the Expiration Date.

 (iii)           [Intentionally Omitted]

(c)           Other Termination Events.

 (i)           If your employment relationship with the Company and each of its Subsidiaries by which you are employed is terminated prior to the Vesting Date as a result of any of the following events:

 A.           your death;

 B.           your Disability;

 C.           your Normal Retirement; or

10

D. a termination by the Company and its Subsidiaries that is not a Termination for Cause or a termination by you that is a Termination for Good Reason;

then, notwithstanding Section 2 of this Agreement, this Option shall become vested and exercisable as to a number of shares of Stock equal to the product of (I) the total number of shares of Stock initially subject to this Option times (II) a fraction, the numerator of which is the number of full months (counting the month in which your termination of employment occurs as a full month), beginning with the first full month following the date of this Agreement, during which you were employed by the Company and/or any Subsidiary and the denominator of which is 36; provided, that, if application of the foregoing calculation would result in you becoming vested in a fractional number of shares, the number of vested shares shall be rounded up to the nearest whole share. The portion, if any, of this Option that thereby becomes vested and exer cisable may be exercised by you at any time during the period specified in Section 4(c)(ii) below. The portion, if any, of this Option that does not thereby become vested and exercisable as of the date of the termination of your employment relationship shall terminate as of the date of termination and shall never become exercisable.

 (ii)           If your employment relationship with the Company and each of its Subsidiaries by which you are employed is terminated for one of the reasons specified in clauses (A), (B) or (D) of Section 4(c)(i) above, then this Option, to the extent then vested and exercisable (including pursuant to Section 4(c)(i) above), may be exercised by you at any time during the period ending on the earlier to occur of (A) the date that is six (6) months following such termination, or (B) the Expiration Date; provided, that, if any such termination (I) is a termination by the Company and its Subsidiaries that is not a Termination for Cause or a termination by you that is a Termination for Good Reason and (II) occurs upon or following the occurrence of a Change in Control, then this Option, to the extent then vested and exercisable, may be exercised by you at any time prior to the Expiration Date. If your employment relationship with the Company and each of its Subsidiaries by which you are employed is terminated for one of the reasons specified in clause (C) of Section 4(c)(i) above, then this Option, to the extent then vested and exercisable (including pursuant to Section 4(c)(i) above), may be exercised by you at any time prior to the Expiration Date.

 (iii)           For purposes of this Section 4(c), “Disability” shall have the meaning ascribed to it in the Severance Agreement between you and the Company or one of its Subsidiaries; and “Normal Retirement” shall mean the termination of your employment relationship with the Company and each of its Subsidiaries by which you are employed due to your retirement on or after the date you attain age 60.

2.  The form of Nonstatutory Stock Option Agreement between the Company and its other executive officers varies from this form by modifying Section 24(b) to provide, in its entirety, the following:

 (b)        Notwithstanding Section 4(c), if the exercise of the Option within the applicable time period set forth in Section 4(c) is prevented by the provisions of Section 24(a) above, the Option will remain exercisable until 30 days after the date you are notified by the Company that the Option is exercisable, but in any event no later than the Expiration Date. The Company makes no representation as to the tax consequences of any such delayed exercise. You should consult with your tax advisor as to the tax consequences of any such delayed exercise.

3. The form of Nonstatutory Stock Option Agreement between the Company and its other executive officers varies from this form by modifying Section 25 to provide, in its entirety, the following:

 25.        Extension in Connection with Section 16. Notwithstanding Section 4(c), if a sale within the applicable time periods set forth in Section 4(c) of shares acquired upon exercise of the Option would subject you to suit under Section 16(b) of the Exchange Act, the Option will remain exercisable until the earliest to occur of (a) the 10th day following the date on which a sale of such shares by you would no longer be subject to such suit, (b) the 190th day after your termination of

11

service with the Company and its Subsidiaries, or (c) the Expiration Date. The Company makes no representation as to the tax consequences of any such delayed exercise. You should consult with your tax advisor as to the tax consequences of any such delayed exercise.

12

EX-31.1

EXHIBIT 31.1

CHIEF EXECUTIVE OFFICER CERTIFICATION

I, Scott D. Sheffield, certify that:

1. I have reviewed this quarterly report on Form 10-Q of Pioneer Natural Resources Company;

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 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.

May 6, 2010
	/s/ Scott D. Sheffield
	Scott D. Sheffield, Chairman and
	Chief Executive Officer

EX-31.2

EXHIBIT 31.2

CHIEF FINANCIAL OFFICER CERTIFICATION

I, Richard P. Dealy, certify that:

1. I have reviewed this quarterly report on Form 10-Q of Pioneer Natural Resources Company;

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 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.

May 6, 2010
	/s/ Richard P. Dealy
	Richard P. Dealy, Executive Vice President
	and Chief Financial Officer

EX-32.1

EXHIBIT 32.1

CERTIFICATION OF

CHIEF EXECUTIVE OFFICER

OF PIONEER NATURAL RESOURCES COMPANY

PURSUANT TO 18 U.S.C. § 1350

I, Scott D. Sheffield, Chairman and Chief Executive Officer of Pioneer Natural Resources Company (the "Company"), hereby certify that the accompanying Quarterly Report on Form 10-Q for the quarterly period ended March 31, 2010 and filed with the Securities and Exchange Commission pursuant to Section 13(a) of the Securities Exchange Act of 1934 (the "Report") by the Company fully complies with the requirements of that section.

I further certify that the information contained in the Report fairly presents, in all material respects, the financial condition and results of operations of the Company.

	/s/ Scott D. Sheffield
Name:	Scott D. Sheffield, Chairman and
	Chief Executive Officer
Date:	May 6, 2010

EX-32.2

EXHIBIT 32.2

CERTIFICATION OF

CHIEF FINANCIAL OFFICER

OF PIONEER NATURAL RESOURCES COMPANY

PURSUANT TO 18 U.S.C. § 1350

I, Richard P. Dealy, Executive Vice President and Chief Financial Officer of Pioneer Natural Resources Company (the "Company"), hereby certify that the accompanying Quarterly Report on Form 10-Q for the quarter ended March 31, 2010 and filed with the Securities and Exchange Commission pursuant to Section 13(a) of the Securities Exchange Act of 1934 (the "Report") by the Company fully complies with the requirements of that section.

I further certify that the information contained in the Report fairly presents, in all material respects, the financial condition and results of operations of the Company.

	/s/ Richard P. Dealy
Name:	Richard P. Dealy, Executive Vice
	President and Chief Financial Officer
Date:	May 6, 2010