EX-2.1

THIS PURCHASE AND SALE AGREEMENT (this “Agreement”) is made as of October 17, 2016 (the “Execution Date”) between SM ENERGY COMPANY, a Delaware corporation (“SM Energy”) and OASIS PETROLEUM NORTH AMERICA LLC, a Delaware limited liability company (“Buyer”). SM Energy and Buyer shall sometimes be referred to herein together as the “Parties”, and each individually as a “Party”.

WHEREAS, SM Energy owns certain oil and gas leases located in Montana, and North Dakota and associated assets as more fully described below; and

WHEREAS, SM Energy desires to sell and Buyer desires to purchase the Assets (as defined below) upon the terms and conditions set forth in this Agreement.

NOW THEREFORE, in consideration of the mutual agreements herein contained, the Parties hereby agree as follows:

Capitalized terms used in this Agreement shall have the meanings given such terms in Annex I.

All references in this Agreement to Exhibits, Appendices, Annexes, Articles, Sections, subsections and other subdivisions refer to the corresponding Exhibits, Appendices, Annexes, Articles, Sections, subsections and other subdivisions of or to this Agreement unless expressly provided otherwise. Titles appearing at the beginning of any Articles, Sections, subsections and other subdivisions of this Agreement are for convenience only, do not constitute any part of this Agreement, and shall be disregarded in construing the language hereof. The words “this Agreement,” “herein,” “hereby,” “hereunder” and “hereof,” and words of similar import, refer to this Agreement as a whole and not to any particular Article, Section, subsection or other subdivision unless expressly so limited. The words “this Article,” “this Section” and “this subsection,” and words of similar import, refer only to Article, Section or subsection hereof in which such words occur. The word “including” (in its various forms) means “including without limitation.” All references to “$” or “dollars” shall be deemed references to United States Dollars. Each accounting term not defined herein will have the meaning given to it under GAAP, as in effect on the Execution Date. Pronouns in masculine, feminine or neuter genders shall be construed to state and include any other gender, and words, terms and titles (including terms defined herein) in the singular form shall be construed to include the plural and vice versa, unless the context otherwise requires. Appendices, Annexes and Exhibits referred to herein are attached to and made a part of this Agreement. Unless expressly stated otherwise, references to any Law or contract shall mean such Law or contract as it may be amended from time to time.

(a) Subject to the terms and conditions of this Agreement, Buyer agrees to purchase from SM Energy, and SM Energy agrees to sell, assign and deliver to Buyer the Assets for the consideration specified in this Article II.

Subject to the other terms and conditions of this Agreement, the purchase price for the Assets shall be Seven Hundred Eighty-Five Million Dollars ($785,000,000) (the “Purchase Price”). The Purchase Price shall be payable as follows:

(a) Upon the earlier of October 21, 2016, or one (1) Business Day following the day when the Escrow Agent opens the escrow account, Buyer shall deposit by wire transfer in immediately available funds with Wells Fargo Bank, National Association (the “Escrow Agent”), the sum of $78,500,000 (such amount, together with any interest earned thereon (the “Deposit”), which Deposit shall be held in escrow by the Escrow Agent pursuant to the terms of the Escrow Agreement, and disbursed in accordance with the terms of this Agreement; and

(b) At Closing, Buyer shall pay SM Energy the Closing Amount by wire transfer in immediately available funds.

(a) If the transactions contemplated by Section 2.1 are not consummated on or before the Closing Date because of: the failure of Buyer to materially perform any of its obligations hereunder; provided, that SM Energy is not in material breach of the terms of this Agreement and is ready, willing and able to perform all of its obligations hereunder, or the failure of any of Buyer’s representations or warranties hereunder to be true and correct in all material respects (without regard to materiality qualifiers) as of the Execution Date and as of the Closing, then, in such event, SM Energy shall have the right to terminate this Agreement and receive the Deposit free of any claims by Buyer thereto, as provided in Section 12.2(b).

(b) If this Agreement is terminated by the mutual written agreement of the Parties, or if the Closing does not occur on or before the Closing Date for any reason other than as set forth in Section 2.3(a), then Buyer shall be entitled to the delivery of the Deposit, free of any claims by SM Energy with respect thereto.

(c) In the event of any termination of this Agreement as contemplated by Section 2.3(a) or Section 2.3(b) above, the Parties shall, in each case, immediately have the rights and obligations set forth in Section 12.2 and Section 12.3.

(a) For purposes of determining the amounts of the adjustments to the Purchase Price provided for in this Section 2.4, the principles set forth in this Section 2.4(a) shall apply. Buyer shall be entitled to all production of Hydrocarbons from or attributable to the Units, Leases, and Wells at and after the Effective Time (and all products and proceeds attributable thereto), and to all other income, proceeds, receipts and credits earned with respect to the Assets at or after the Effective Time, and shall be responsible for (and entitled to any refunds with respect to) all Operating Expenses incurred at and after the Effective Time. SM Energy shall be entitled to all Hydrocarbon production from or attributable to Units, Leases and Wells prior to the Effective Time (and all products and proceeds attributable thereto), and to all other income, proceeds, receipts and credits earned with respect to the Assets prior to the Effective Time, and shall be responsible for (and entitled to any refunds with respect to) all Operating Expenses incurred prior to the Effective Time. The Parties shall disclose to each other any revenues received after the date of final settlement of the Purchase Price pursuant to Section 2.6 to which the other Party is entitled and account to such Party within ten (10) days of receipt of such revenues. “Earned” and “incurred”, as used in the Agreement shall be interpreted in accordance with GAAP and Council of Petroleum Accountants Society standards, except as otherwise specified herein. For purposes of allocating production (and proceeds and accounts receivable with respect thereto), under this Section 2.4, (i) liquid Hydrocarbons shall be deemed to be “from or attributable to” the Units, Leases and Wells when they pass through the pipeline connecting into the storage facilities into which they are run and (ii) gaseous Hydrocarbons shall be deemed to be “from or attributable to” the Units, Leases and Wells when they pass through the royalty measurement meters, delivery point sales meters or custody transfer meters on the gathering lines or pipelines through which they are transported (whichever meter is closest to the well). SM Energy shall utilize reasonable interpolative procedures, consistent with industry practice, to arrive at an allocation of production when exact meter readings or gauging and strapping data are not available. As part of the Preliminary Settlement Statement, Buyer shall provide to SM Energy such data as is reasonably necessary to support any estimated allocation, for purposes of establishing the Closing Amount.

(b) The Purchase Price shall be adjusted upward by the following amounts (without duplication):

(i) an amount equal to the value of all marketable Hydrocarbons produced from or attributable to the Assets in storage or existing in stock tanks (excluding tank bottoms), pipelines and/or plants (including inventory) as of the Effective Time, the value to be based upon the contract price in effect as of the Effective Time (or if there is no contract price, then the market price in effect as of the Effective Time in the field in which such Hydrocarbons were produced) or if actually sold prior to the date of determination, the proceeds actually recovered by SM Energy attributable to such sale, net of amounts payable as royalties, overriding royalties and other burdens upon, measured by or payable out of such production and Asset Taxes;

(ii) an amount equal to all Operating Expenses for which Buyer is responsible under Section 2.4(a) paid by SM Energy that are attributable to the Assets from and after the Effective Time, whether paid before or after the Effective Time;

(iv) Subject Transfer Taxes paid by SM Energy with respect to the transactions contemplated by this Agreement;

(v) all Asset Taxes allocated to Buyer that are paid or to be paid by SM Energy; and

(vi) any other amount provided for elsewhere in this Agreement or otherwise agreed upon by the Parties.

(i) an amount equal to all proceeds actually received by or credited to SM Energy attributable to the sale of Hydrocarbons produced from or attributable to the Assets from and after the Effective Time or contained in storage or existing in stock tanks, pipelines and/or plants (including inventory) as of the Effective Time for which an upward Purchase Price adjustment was made pursuant to Section 2.4(b);

(ii) if SM Energy makes the election under Section 6.2(c)(i) with respect to a Title Defect, the Title Defect Amount with respect to such Title Defect if the Title Defect Amount has been determined prior to Closing;

(iii) if SM Energy makes the election under Section 7.1(b)(i) with respect to an Environmental Defect, the Remediation Amount with respect to such Environmental Defect if the Remediation Amount has been determined prior to Closing;

(iv) an amount determined pursuant to Section 7.1(b)(iii), Section 6.4(c)(ii) or Section 6.4(d)(i), as applicable, for any Asset excluded from the transaction contemplated hereby pursuant to such Sections;

(vi) all costs and expenses incurred by Buyer related to the Venting Obligations (which in no event will exceed $600,000);

(vii) an amount equal to all Operating Expenses for which SM Energy is responsible under Section 2.4(a) paid or payable by Buyer that are attributable to the Assets prior to the Effective Time;

(viii) any other amount provided for elsewhere in this Agreement or otherwise agreed upon by the Parties; and

(d) If, prior to Closing, Buyer or SM Energy discovers an error in the Imbalances set forth in Schedule 3.10, then the Purchase Price shall be further adjusted at Closing (based on a value of (x) $1.00 per Mcf for gas multiplied by the total volume of such imbalances and (y) NYMEX (as of the Closing Date) less $6.00 per barrel multiplied by the total volume of oil imbalances) pursuant to Section 2.4(b)(iii) or Section 2.4(c)(vi), as applicable, and Schedule 3.10 will be deemed amended immediately prior to the Closing to reflect the Imbalances for which the Purchase Price is so adjusted.

(a) SM Energy and Buyer have agreed upon an allocation of the unadjusted Purchase Price among each of the Wells and Well Locations, and such allocations are set forth on Schedule 2.5(a) (the “Allocated Values”). SM Energy and Buyer agree that the Allocated Values shall be used in calculating adjustments to the Purchase Price as provided herein. Any adjustments to the Purchase Price, other than the adjustments provided for in Section 2.4, shall be applied on a pro rata basis to the amounts set forth in Schedule 2.5(a), as applicable, for all Assets. After all such adjustments are made, any adjustments to the Purchase Price made pursuant to Section 2.4 shall be applied to the amounts set forth on Schedule 2.5(a), as applicable, for the particular affected Assets.

(b) On or before the Closing Date, Buyer and SM Energy will agree upon an allocation of the unadjusted Purchase Price among each of the Assets, in compliance with the principles of Section 1060 of the Code, and the United States Treasury Regulations thereunder. Such allocation shall be in the format of Schedule 2.5(b). SM Energy and Buyer agree (i) that the Allocated Values, as adjusted pursuant to this paragraph, shall be used by SM Energy and Buyer as the basis for reporting asset values and other items for purposes of all federal, state, and local Tax Returns, including Internal Revenue Service Form 8594 and (ii) that neither they nor their Affiliates will take positions inconsistent with Schedule 2.5(b) (as adjusted pursuant to this paragraph) in notices to Governmental Bodies, in audit or other Proceedings with respect to Taxes, in notices to preferential purchase right holders, or in other documents or notices relating to the transactions contemplated by this Agreement without the consent of the other Party. Buyer and SM Energy further agree that, on or immediately after the Closing Date, they will mutually agree as to the further allocation of the values on Schedule 2.5(a) as to the relative portion of those values attributable to leasehold costs and depreciable equipment.

(a) Not less than five (5) Business Days prior to the Closing, SM Energy shall prepare and submit to Buyer for review a draft settlement statement using the best information available to SM Energy (the “Preliminary Settlement Statement”) that shall set forth the adjusted Purchase Price reflecting each adjustment made in good faith in accordance with this Agreement as of the date of preparation of such Preliminary Settlement Statement. Within three (3) Business Days of receipt of the Preliminary Settlement Statement, Buyer has the right, but not the obligation, to deliver to SM Energy a written report containing all changes with the explanation therefor that Buyer proposes to be made to the Preliminary Settlement Statement.

The Preliminary Settlement Statement, as agreed upon by the Parties, will be used to adjust the Purchase Price at Closing (such adjusted price, the “Preliminary Purchase Price”). If the Parties cannot agree on the Preliminary Settlement Statement prior to the Closing, the Preliminary Settlement Statement as presented by SM Energy and prepared in accordance with this Section 2.6(a) will be used to adjust the Purchase Price at Closing.

(b) On or before 120 days after the Closing, a final settlement statement (the “Final Settlement Statement”) will be prepared by SM Energy, based on actual income and expenses attributable to the periods prior to and after the Effective Time, including any amount set forth in the Preliminary Settlement Statement as well as any settlement during the term of the Transition Services Agreement, and which takes into account all final adjustments made to the Purchase Price and shows the resulting final adjusted Purchase Price (the “Final Purchase Price”). SM Energy shall, at Buyer’s request, supply reasonable documentation in its or its Affiliates’ possession available to support the actual revenue, expenses and other items for which adjustments are made. The Final Settlement Statement shall set forth the actual proration of the amounts required by this Agreement. As soon as practicable, and in any event within 45 days, after receipt of the Final Settlement Statement, Buyer has the right, but not the obligation, to return a written report containing any proposed changes to the Final Settlement Statement and an explanation of any such changes and the reasons therefor (the “Dispute Notice”). If the Final Purchase Price set forth in the Final Settlement Statement is mutually agreed upon by SM Energy and Buyer, the Final Settlement Statement and the Final Purchase Price shall be final and binding on the Parties. Once the Final Purchase Price has been agreed upon by the Parties pursuant to this Section 2.6(b) or determined by the Accounting Arbitrator pursuant to Section 2.6(c), as applicable, the Parties shall execute a certificate setting forth such agreed or determined, as applicable, Final Purchase Price, which shall be binding on the Parties for all purposes of this Agreement.

(c) If the Parties are unable to resolve the matters addressed in the Dispute Notice, each of Buyer and SM Energy shall, within 14 Business Days following the delivery of such Dispute Notice, summarize its position with regard to such dispute in a written document and submit such summaries to the Houston, Texas office of KPMG LLP or such other Person as the Parties may mutually select (the “Accounting Arbitrator”), together with the Dispute Notice, the Final Settlement Statement and any other documentation such Party may desire to submit. Within 20 Business Days after receiving the Parties’ respective submissions, the Accounting Arbitrator shall render a decision choosing either SM Energy’s position or Buyer’s position with respect to each matter addressed in any Dispute Notice, based on the materials described above. Any decision rendered by the Accounting Arbitrator pursuant hereto shall be final, conclusive and binding on the Parties and will be enforceable against any of the Parties in any court of competent jurisdiction. The costs of such Accounting Arbitrator shall be borne one-half by Buyer and one-half by SM Energy.

SM Energy and Buyer hereby agree that SM Energy shall have the right at any time prior to completion of all the transactions that are to occur at Closing to assign all or a portion of its rights under this Agreement to a Qualified Intermediary (as that term is defined in Section 1.1031(k)-1(g)(4)(v) of the Treasury Regulations) in order to accomplish the transaction

in a manner that will comply, either in whole or in part, with the requirements of a like-kind exchange pursuant to Section 1031 of the Code. Likewise, Buyer shall have the right at any time prior to completion of all the transactions that are to occur at Closing to assign all or a portion of its rights under this Agreement to a Qualified Intermediary for the same purpose. If SM Energy assigns all or any of its rights under this Agreement for this purpose, Buyer agrees to (a) consent to SM Energy’s assignment of its rights in this Agreement, which assignment shall be in a form reasonably acceptable to Buyer, and (b) pay the Purchase Price (or a designated portion thereof as specified by SM Energy) into a qualified escrow or qualified trust account(s) at Closing as directed in writing. If Buyer assigns all or any of its rights under this Agreement for this purpose, SM Energy agrees to (i) consent to Buyer’s assignment of its rights in this Agreement, which assignment shall be in a form reasonably acceptable to SM Energy, (ii) accept the Purchase Price from the qualified escrow or qualified trust account at Closing, and (iii) at Closing, convey and assign directly to Buyer the Assets (or any portion thereof) as directed by Buyer. SM Energy and Buyer acknowledge and agree that any assignment of this Agreement (or any rights hereunder) to a Qualified Intermediary shall not release any Party from any of its respective liabilities and obligations hereunder, and that neither Party represents to the other Party that any particular tax treatment will be given to any Party as a result thereof. The Party electing to assign all or any of its rights under this Agreement pursuant to this Section 2.7 shall defend, indemnify, and hold harmless the other Party and its Affiliates from all claims, costs, losses and expenses relating to such election.

SM Energy represents and warrants to Buyer, as of the Execution Date and as of the Closing Date, except to the extent any representation or warranty is made as of a specified date, in which case, SM Energy represents and warrants to Buyer as of such specified date, the following:

SM Energy is a corporation duly formed and validly existing under the Laws of the State of Delaware. SM Energy has all requisite power and authority to own and operate its property (including, without limitation, the Assets) and to carry on its business as now conducted. SM Energy is duly licensed or qualified to do business as a foreign corporation and is in good standing in all jurisdictions in which such qualification is required by Law, except where the failure to qualify or be in good standing would not have a Material Adverse Effect.

SM Energy has full power and authority to enter into and perform this Agreement and the transactions contemplated herein. The execution, delivery and performance by SM Energy of this Agreement has been, and the execution, delivery and performance by SM Energy of all other documents delivered pursuant to this Agreement will be when delivered, duly and validly authorized and approved by all necessary corporate action on the part of SM Energy. Assuming the due authorization, execution and delivery by the other parties to such documents, this Agreement constitutes, and the other documents delivered pursuant to this Agreement to which

SM Energy is a party will constitute when delivered, SM Energy’s legal, valid and binding obligations, enforceable against SM Energy in accordance with their respective terms, subject however to the effects of bankruptcy, insolvency, reorganization, fraudulent transfer, moratorium and similar Laws relating to or affecting creditors’ rights, as well as to principles of equity (regardless of whether such enforceability is considered in a proceeding in equity or at Law).

Assuming the receipt of all Consents and the waiver of all Preferential Rights, in each case, as set forth on Schedule 3.3, the execution, delivery and performance by SM Energy of this Agreement and the consummation of the transactions contemplated hereby does not and will not (a) conflict with or result in a breach of any provisions of the organizational documents or other governing documents of SM Energy, (b) except for Permitted Encumbrances (if any), result in a default or the creation of any Encumbrance or give rise to any right of termination, cancellation or acceleration under any of the terms, conditions or provisions of any note, bond, mortgage, indenture, license or other material agreement (other than the Leases or Applicable Contracts) to which SM Energy is a party or by which SM Energy or the Assets may be bound, (c) violate any Law applicable to SM Energy or any of the Assets or (d) violate any judgment, order, ruling, or decree applicable to SM Energy or any of the Assets, except in the case of clauses (b), (c) and (d) where such default, Encumbrance, termination, cancellation, acceleration or violation would not have a material adverse effect, individually or in the aggregate, upon the ability of SM Energy to consummate the transactions contemplated by this Agreement.

There are no bankruptcy, reorganization or receivership proceedings pending, being contemplated by or, to SM Energy’ Knowledge, threatened in writing against SM Energy or in respect of any of the Assets.

SM Energy is not a “disregarded entity” or a “foreign person” within the meaning of Section 1445 of the Code and its implementing Treasury Regulations.

Except as set forth in Schedule 3.6, there are no pending Proceedings against SM Energy or in respect of any of the Assets before any Governmental Authority or arbitral panel, and no Proceedings pending or, to SM Energy’s Knowledge, threatened in writing against SM Energy or the Assets, or with respect to SM Energy’s ownership or operation of the Assets.

(a) Schedule 3.7(a) sets forth all Applicable Contracts of the type described below (collectively, the “Material Contracts”):

(i) any Applicable Contract that can reasonably be expected to result in aggregate payments by SM Energy of more than $100,000 during the current or any

subsequent fiscal year or $500,000 in the aggregate over the term of such Applicable Contract (in each case, based solely on the terms thereof and without regard to any expected increase in volumes or revenues) that cannot be terminated by SM Energy on not greater than 90 days’ notice without liability or penalty;

(ii) any Applicable Contract that can reasonably be expected to result in aggregate revenues to SM Energy of more than $100,000 during the current or any subsequent fiscal year or $500,000 in the aggregate over the term of such Applicable Contract (in each case, based solely on the terms thereof and without regard to any expected increase in volumes or revenues);

(iii) any Applicable Contract that (A) is a Hydrocarbon purchase and sale, gathering, transportation, processing, compression or similar Contract pursuant to which SM Energy received annual revenues or makes annual payments in excess of $500,000 and (B) is not terminable by SM Energy or its assignee without liability or penalty on 60 days’ or less notice;

(iv) any Applicable Contract that is an indenture, mortgage, loan, credit or sale-leaseback, guaranty of any obligation, bonds, letters of credit or similar financial Contract;

(v) any Applicable Contract that is a joint operating agreement, area of mutual interest agreement, farmout or farmin agreement, partnership agreement, joint venture agreement, or agreement containing a call option, most favored nations provision or any restriction on ability to engage in business;

(vi) any Applicable Contract that constitutes a lease under which SM Energy is the lessor or the lessee of real, immovable, personal or movable property that is material to the ownership or use of the Assets as currently used;

(vii) any agreement of or binding upon SM Energy to sell, lease, transfer, farmout, or otherwise dispose of any interest in any of the Assets after the Execution Date, other than (x) conventional rights of reassignment arising in connection with SM Energy’s surrender or release of any of the Assets and (y) preferential rights to purchase the Assets, which are addressed in Section 6.4; and

(viii) Applicable Contracts with any Affiliate of SM Energy that will be binding on Buyer after the Closing Date and will not be terminable by Buyer within 30 days’ or less notice.

(b) Except as set forth in Schedule 3.7(a), as of the Execution Date there exist no material defaults under the Material Contracts by SM Energy or, to SM Energy’s Knowledge, by any other Person that is a party to the Material Contracts. To SM Energy’s Knowledge, the Material Contracts are in full force and effect and legally enforceable (as to enforceability, subject to applicable bankruptcy, insolvency, fraudulent conveyance, reorganization, moratorium and similar Laws affecting creditors’ rights generally and to general principles of equity (regardless of whether enforceability is considered in a proceeding at law or in equity)) against the parties thereto.

SM Energy and its Affiliates are not, and the ownership and operation of the Assets are not, in violation of any applicable Laws in material respects, provided, however, that with respect to the Assets not operated by SM Energy or its Affiliates, this representation is limited to the Knowledge of SM Energy. This Section 3.8 does not include any matters with respect to Environmental Laws, such matters being addressed exclusively in Section 3.12.

Except for such items that are being held in suspense as permitted pursuant to applicable Law in the amounts set forth on Schedule 3.9, SM Energy has paid all Burdens in all material respects due by SM Energy with respect the Assets or, if SM Energy has not paid any such Burdens, is contesting such unpaid Burdens in good faith.

Schedule 3.10 sets forth all material Imbalances associated with the Assets as of the Effective Time.

Schedule 3.11 sets forth, as of the Execution Date, all authorities for expenditures relating to the Assets to drill or rework Wells or other operations (“AFEs”) for which all of the activities anticipated in such AFEs have not been completed by the Execution Date, and all AFEs for which costs are attributable to the Interim Period.

(a) With respect to the Assets, SM Energy has not entered into, and is not subject to, any agreement, consent, order, decree, judgment, license or permit condition or other directive of any Governmental Authority that (i) are in existence as of the Execution Date, (ii) are based on any Environmental Laws that relate to the future use of any of the Assets and (iii) require any change in the present conditions of any of the Assets.

(b) Except as set forth in Schedule 3.12, as of the Execution Date, SM Energy has not received any unresolved written notice from any Person of any material release, disposal, event, condition, circumstance, activity, practice or incident concerning any land, facility, asset or property included in the Assets that: (i) interferes with or prevents compliance by SM Energy with any Environmental Law or the terms of any license or permit issued pursuant thereto or (ii) gives rise to or results in any common Law or other liability of SM Energy to any Person.

(a) With respect to all Asset Taxes, (i) all reports, returns, statements (including estimated reports, returns or statements), and other similar filings (the “Tax Returns”)

affecting the ownership or operation of the Assets required to be filed on or before the Closing Date by SM Energy have been or will be timely filed with the appropriate Governmental Authority in all jurisdictions in which such Tax Returns are required to be filed; and (ii) such Tax Returns are true and correct in all material respects, and all Asset Taxes reported on such Tax Returns have been or will be paid when due.

(b) With respect to all Asset Taxes, (i) there are not currently in effect any extension or waiver of any statute of limitations of any jurisdiction regarding the assessment or collection of any Asset Tax; (ii) there are no claims or Proceedings pending against SM Energy or the Assets by any Governmental Authority for which SM Energy has received written notice; and (iii) there are no Asset Tax liens on any of the Assets except for liens for Asset Taxes not yet due.

SM Energy has incurred no liability, contingent or otherwise, for brokers’ or finders’ fees relating to the transactions contemplated by this Agreement for which Buyer or any Affiliate of Buyer shall have any responsibility.

(a) all Wells have been drilled and completed within the limits permitted by all applicable Leases related to such Leases;

(b) other than Wells that have been plugged and abandoned in accordance with all applicable Laws, there are no dry holes, or shut in or otherwise inactive wells drilled by SM Energy that are located on lands burdened by the Leases or on lands pooled or unitized therewith that SM Energy is currently obligated or liable to plug and abandon; and

(c) there are no Wells that constitute a part of the Assets (i) in respect of which SM Energy has received a written notice, claim, demand or order from any Governmental Authority notifying, claiming, demanding or requiring that such Well(s) be temporarily or permanently plugged and abandoned, and (ii) which have not been temporarily or permanently plugged and abandoned.

To SM Energy’s Knowledge, Exhibit B identifies each Well that is subject to a change of ownership at payout or other contractual trigger at payout, and the reduced interest of SM Energy therein, subject to any Permitted Encumbrances. Schedule 3.16 identifies the payout status for each Well as of June 1, 2016, for Wells operated by SM Energy and as of the most recent statement received from the operator of each Well not operated by SM Energy. Other than as identified on Schedule 3.16, since October 1, 2016, SM Energy has not elected or been deemed to have elected to “non-consent,” or failed to participate in, the drilling or reworking of a Well, any seismic program or any other operation which would cause SM Energy to lose or forfeit any interests in the Wells constituting part of the Assets under any applicable operating agreement.

Except as set forth on Schedule 3.17, with respect to Assets operated by SM Energy (and to SM Energy’s Knowledge with respect to Assets not operated by SM Energy), SM Energy has all material licenses, orders, franchises, registrations and permits of all Governmental Authorities required to permit the operation of the Assets as presently operated (the “Required Permits”) and each is in full force and effect. To SM Energy’s Knowledge, there are no outstanding violations of any of the Required Permits.

(a) Except as set forth in Schedule 3.18, neither SM Energy nor any of its Affiliates have breached the Leases in a manner that would result in material damages thereunder or termination thereof. No written demands or notices of default or non-compliance or dispute (including those received electronically) have been issued to or received by SM Energy or any of its Affiliates that remain uncured or outstanding with respect to any Lease. Except as set forth in Schedule 3.18, to SM Energy’s Knowledge, all material rentals due and payable by or on account of SM Energy (including any operator of the Assets) to royalty holders and other interest owners under or with respect to the Assets have been timely paid in full or are being disputed in good faith. Except as set forth on Exhibit A, no undeveloped Lease has a primary term expiring less than six (6) months from the Execution Date.

(b) Except as set forth in Schedule 3.18, neither SM Energy or any of its Affiliates is in breach, in any material respect, of any provision in any Easement necessary to operate the Assets in a manner consistent with its past practices or in default with respect to the performance of any obligation under any such Easement, and, to SM Energy’s Knowledge, no party to any such Easement or any successor to the interest of such party has filed or has threatened in writing to file any Proceeding to terminate, cancel, rescind or procure judicial reformation of any Lease or any such Easement.

Schedule 3.19 sets forth a true, correct and complete list of all Suspended Funds as of the date set forth thereon, in respect of each of the Wells.

SM Energy is not obligated by virtue of any take-or-pay payment, advance payment or other similar payment (other than royalties, overriding royalties and similar arrangements reflected with respect to the Net Revenue Interests for the Wells set forth in Exhibit B and gas balancing arrangements), to deliver Hydrocarbons attributable to the Assets, or proceeds from the sale thereof, at some future time without receiving payment therefore at or after the time of delivery.

Schedule 3.21 sets forth all of the Assets that are deemed by agreement or applicable Law to be held by a partnership for federal Tax purposes.

Except for the representations and warranties contained in this Agreement (as qualified by the Schedules), or in the certificate delivered by SM Energy at Closing or the Subject Special Warranty, neither SM Energy nor any other Person makes (and Buyer is not relying upon) any other express or implied representation or warranty with respect to SM Energy (including the value, condition or use of any of the Assets) or the transactions contemplated by this Agreement, and SM Energy disclaims any other representations or warranties not contained in this Agreement, whether made by SM Energy, any Affiliate of SM Energy, or any of their respective officers, directors, managers, employees or agents. Except for the representations and warranties contained in this Agreement (as qualified by the Schedules), SM Energy disclaims all liability and responsibility for any representation, warranty, projection, forecast, statement or information made, communicated or furnished (orally or in writing) to Buyer or any of its Affiliates or any of its officers, directors, managers, employees or agents (including any opinion, information, projection or advice that may have been or may be provided to Buyer by any director, officer, employee, agent, consultant or representative of SM Energy, or any of its Affiliates). Buyer acknowledges and represents, warrants and agrees that it has not relied upon the accuracy or completeness of any express or implied representation, warranty, statement or information of any nature made or provided by or on behalf of SM Energy, except for the representations and warranties of SM Energy expressly set forth in this Agreement, or in the certificate delivered by SM Energy at Closing or the Subject Special Warranty and waives any right Buyer may have against SM Energy with respect to any inaccuracy in any such representation, warranty, statement or information, or with respect to any omission or concealment, on the part of SM Energy or any representative of SM Energy, of any potentially material information. The disclosure of any matter or item in the Schedules shall not be deemed to constitute an acknowledgement that any such matter is required to be disclosed or is material or that such matter would or would reasonably be expected to result in a Material Adverse Effect. Notwithstanding any of the foregoing, nothing herein shall relieve SM Energy for any liability for knowing and intentional fraud.

Buyer represents and warrants to SM Energy, as of the Execution Date and as of the Closing Date, except to the extent any representation or warranty is made as of a specified date, in which case, Buyer represents and warrants to SM Energy as of such specified date, the following:

Buyer is a limited liability company duly formed and validly existing under the Laws of the State of Delaware. Buyer has all requisite power and authority to own and operate its property

(including, at Closing, the Assets) and to carry on its business as now conducted. Buyer is duly licensed or qualified to do business as a foreign limited liability company and is in good standing in all jurisdictions in which such qualification is required by Law except where the failure to qualify or be in good standing would not have a material adverse effect upon the ability of Buyer to consummate the transactions contemplated by this Agreement.

Buyer has full power and authority to enter into and perform this Agreement to which it is a party and the transactions contemplated herein. The execution, delivery and performance by Buyer of this Agreement has been, and the execution, delivery and performance by Buyer of all other documents delivered pursuant to this Agreement will be when delivered, duly and validly authorized and approved by all necessary limited liability company action on the part of Buyer. Assuming the due authorization, execution and delivery by the other parties to such documents, this Agreement constitutes, and the other documents delivered pursuant to this Agreement to which Buyer is a party will constitute, Buyer’s legal, valid and binding obligations, enforceable against Buyer in accordance with their respective terms, subject however to the effects of bankruptcy, insolvency, reorganization, fraudulent transfer, moratorium and similar Laws relating to or affecting creditors’ rights, as well as to principles of equity (regardless of whether such enforceability is considered in a proceeding in equity or at Law).

The execution, delivery and performance by Buyer of this Agreement and the consummation of the transactions contemplated herein will not (a) conflict with or result in a breach of any provisions of the organizational or other governing documents of Buyer, (b) result in a default or the creation of any Encumbrance or give rise to any right of termination, cancellation or acceleration under any of the terms, conditions or provisions of any note, bond, mortgage, indenture, license or other agreement to which Buyer is a party or by which Buyer or any of its property may be bound or (c) violate any Law applicable to Buyer or any of its property, except in the case of clauses (b) and (c) where such default, Encumbrance, termination, cancellation, acceleration or violation would not have a material adverse effect upon the ability of Buyer to consummate the transactions contemplated by this Agreement.

Except for those Consents contained in the Contracts or otherwise applicable to the Assets, there are no consents or other restrictions on assignment, including requirements for consents from third parties to any assignment, in each case, that would be applicable in connection with the consummation by Buyer of the transactions contemplated by this Agreement.

There are no bankruptcy, reorganization or receivership proceedings pending, being contemplated by or, to Buyer’s knowledge, threatened in writing against Buyer.

There is no Proceeding by any Person or by or before any Governmental Authority, and no Proceeding pending, or to Buyer’s knowledge, threatened against Buyer, or to which Buyer is a party, that would affect the ability of Buyer to consummate the transactions contemplated by this Agreement.

Buyer has, and shall have as of the Closing Date, sufficient funds with which to pay the Closing Amount and consummate the transactions contemplated to occur at Closing by this Agreement and, following Closing, Buyer will have sufficient funds to pay any adjustments to the Purchase Price pursuant to Section 2.4.

Buyer is sophisticated in the evaluation, purchase, ownership and operation of oil and gas properties and related facilities. In making its decision to enter into this Agreement and to consummate the transaction contemplated herein, Buyer has relied or shall rely solely on its own independent investigation and evaluation of the Assets and the advice of its own legal, tax, economic, environmental, engineering, geological and geophysical advisors and the express provisions of this Agreement and not on any comments, statements, projections or other materials made or given by any representatives or consultants or advisors engaged by SM Energy, provided, that Buyer shall be entitled to rely on the representations, warranties, covenants and agreements of SM Energy set forth in this Agreement, the agreements to be executed in connection with this Agreement and in the certificate delivered by SM Energy at Closing, and the Subject Special Warranty.

Buyer has incurred no liability, contingent or otherwise, for brokers’ or finders’ fees relating to the transactions contemplated by this Agreement for which SM Energy or any Affiliate of SM Energy shall have any responsibility.

Buyer is an “accredited investor,” as such term is defined in Regulation D of the Securities Act of 1933, as amended, and will acquire the Assets for its own account and not with a view to a sale or distribution thereof in violation of such Law and the rules and regulations thereunder, any applicable state blue sky Laws or any other applicable securities Laws.

(a) From and after the Execution Date and up to and including the Closing Date (or earlier termination of this Agreement), but subject to the other provisions of this

Agreement (including this Section 5.1) and obtaining any required consents of third parties (with respect to which consents SM Energy shall use its commercially reasonable efforts to obtain), SM Energy shall afford to Buyer, its Affiliates and its and their officers, employees, agents, accountants, attorneys, investment bankers, consultants and other authorized representatives (collectively, “Buyer’s Representatives”) reasonable access, during normal business hours, to the Assets and all Records in SM Energy’s or any of its Affiliates’ possession. SM Energy shall also make available to Buyer and Buyer’s Representatives, upon reasonable notice during normal business hours, SM Energy’s personnel knowledgeable with respect to the Assets in order that Buyer may make such diligence investigation as Buyer considers necessary or appropriate. All investigations and due diligence conducted by Buyer or any Buyer’s Representative shall be conducted at Buyer’s sole cost, risk and expense; and any conclusions made from any examination done by Buyer or any Buyer’s Representative shall result from Buyer’s own independent review and judgment. Buyer shall coordinate its access rights and physical inspections of the Assets with SM Energy and any third party that serves as an Operator (each a “Third Party Operator”) to reasonably minimize any inconvenience to or interruption of the conduct of business by SM Energy or any Third Party Operator. Buyer shall give SM Energy reasonable prior written notice before entering onto any of the Assets and SM Energy shall have the right to have its representatives present at any time any Buyer’s Representative is present on the Assets. Buyer shall, and shall cause all of the Buyer’s Representatives to, abide by SM Energy’s and any Third Party Operator’s safety rules, regulations and operating policies while conducting its due diligence evaluation of the Assets including any environmental or other inspection or assessment of the Assets.

(b) Buyer shall not conduct any sampling, boring, drilling or other invasive investigation activities (“Invasive Activities”) on or with respect to any of the Assets without SM Energy’s prior written consent, which consent may be withheld in the sole and absolute discretion of SM Energy for any reason whatsoever.

(c) Buyer agrees to defend, indemnify and hold harmless each of the Operators of the Assets and the SM Indemnified Parties from and against any and all Liabilities arising out of, resulting from or relating to any field visit, environmental property assessment or other due diligence activity conducted by Buyer or any Buyer’s Representative (including an Invasive Activity, if any) with respect to the Assets, EVEN IF SUCH LIABILITIES ARISE OUT OF OR RESULT FROM, SOLELY OR IN PART, THE SOLE, ACTIVE, PASSIVE, CONCURRENT OR COMPARATIVE NEGLIGENCE, STRICT LIABILITY OR OTHER FAULT OR VIOLATION OF LAW OF OR BY A MEMBER OF THE SM INDEMNIFIED PARTIES, EXCEPTING ONLY LIABILITIES ACTUALLY RESULTING ON THE ACCOUNT OF THE KNOWING AND INTENTIONAL FRAUD, GROSS NEGLIGENCE OR WILLFUL MISCONDUCT OF A MEMBER OF THE SM INDEMNIFIED PARTIES.

(d) Buyer agrees to promptly provide SM Energy with copies, but in any event within three (3) Business Days after its receipt or creation thereof, of all final reports and test results prepared by Buyer, any of Buyer’s Representatives or any third party consultants and which contain data collected or generated from Buyer’s due diligence with respect to the Assets (including an Invasive Activity, if any). SM Energy shall not be deemed by its receipt of said documents or otherwise to have made any representation or warranty, expressed, implied or statutory as to the condition to the Assets or to the accuracy of said documents or the information contained therein.

(e) Upon completion of Buyer’s due diligence, Buyer shall, at its sole cost and expense and without any cost or expense to SM Energy or its Affiliates (i) repair all damage done to the Assets in connection with Buyer’s due diligence, (ii) restore the Assets to the approximate same or better condition in existence prior to commencement of Buyer’s due diligence and (iii) remove all equipment, tools or other property brought onto the Assets in connection with Buyer’s due diligence. Any disturbance to the Assets (including, without limitation, the real property associated with such Assets) resulting from Buyer’s due diligence will be promptly corrected by Buyer.

(f) During all periods that Buyer and/or any of Buyer’s Representatives are present on the Assets, Buyer shall maintain, at its sole expense and with insurers reasonably satisfactory to SM Energy, policies of insurance of the types and in the amounts reasonably requested by SM Energy. Each such insurance policy required to be carried by Buyer hereunder will (i) be primary insurance, (ii) list the SM Indemnified Parties as additional insureds, (iii) waive subrogation against the SM Indemnified Parties and (iv) provide for five days prior notice to SM Energy in the event of cancellation or modification of such policy or reduction in the coverage of such policy. Upon request by SM Energy, Buyer shall provide evidence of such insurance to SM Energy prior to entering the Assets.

(g) In no event shall Buyer or Buyer’s Representatives be responsible under this Section 5.1 for any Liabilities arising from the disclosure of a condition of the Assets that existed as of the time immediately prior to inspection.

Buyer acknowledges that, pursuant to its right of access to the Records and the Assets, Buyer will become privy to confidential and other information of SM Energy and that such confidential information shall be held confidential by Buyer and Buyer’s Representatives in accordance with the terms of the Confidentiality Agreement. If Closing should occur, the foregoing confidentiality restriction on Buyer, including the Confidentiality Agreement, shall terminate (except as to (a) any Assets that are excluded from the transactions contemplated hereby pursuant to the provisions of this Agreement, (b) the Excluded Assets, and (c) information related to assets other than the Assets). Subject to Section 14.2, for a period of one (1) year following the Closing, SM Energy shall, and shall cause its Affiliates to, not make any disclosure to third parties of any confidential or proprietary information relating to the Assets, except with the prior consent of Buyer or as required by applicable Law, except to the extent that such information (x) is generally available to and known by the public through no fault of SM Energy or any of its Affiliates, (y) is lawfully acquired by SM Energy or any of its Affiliates from and after the Closing from sources which are not known to SM Energy to be prohibited from disclosing such information by a legal, contractual or fiduciary obligation, or (z) is required to be disclosed pursuant to applicable law, rule or regulation; provided, further, that nothing shall prohibit SM Energy or its Affiliates from using their knowledge or mental impressions of such information or their general knowledge of the industry or geographic area in the conduct of their respective businesses following Closing.

(a) EXCEPT AS AND TO THE EXTENT EXPRESSLY SET FORTH IN ARTICLE III, OR IN THE CERTIFICATE DELIVERED BY SM ENERGY AT CLOSING OR THE SUBJECT SPECIAL WARRANTY, (I) SM ENERGY MAKES NO REPRESENTATIONS OR WARRANTIES, EXPRESS, STATUTORY OR IMPLIED, AND (II) SM ENERGY EXPRESSLY DISCLAIMS ALL LIABILITY AND RESPONSIBILITY FOR ANY REPRESENTATION, WARRANTY, STATEMENT OR INFORMATION MADE OR COMMUNICATED (ORALLY OR IN WRITING) TO BUYER OR ANY BUYER’S REPRESENTATIVE (INCLUDING, WITHOUT LIMITATION, ANY OPINION, INFORMATION, PROJECTION OR ADVICE THAT MAY HAVE BEEN PROVIDED TO BUYER BY ANY OFFICER, DIRECTOR, EMPLOYEE, AGENT, CONSULTANT, REPRESENTATIVE OR ADVISOR OF SM ENERGY OR ANY OF ITS AFFILIATES).

(b) EXCEPT AS EXPRESSLY SET FORTH IN ARTICLE III, OR IN THE CERTIFICATE DELIVERED BY SM ENERGY AT CLOSING OR THE SUBJECT SPECIAL WARRANTY, AND WITHOUT LIMITING THE GENERALITY OF THE FOREGOING, SM ENERGY EXPRESSLY DISCLAIMS ANY REPRESENTATION OR WARRANTY, EXPRESS, STATUTORY OR IMPLIED, AS TO (I) TITLE TO ANY OF THE ASSETS, (II) THE CONTENTS, CHARACTER OR NATURE OF ANY REPORT OF ANY PETROLEUM ENGINEERING CONSULTANT, OR ANY ENGINEERING, GEOLOGICAL OR SEISMIC DATA OR INTERPRETATION, RELATING TO THE ASSETS, (III) THE QUANTITY, QUALITY OR RECOVERABILITY OF HYDROCARBONS IN OR FROM THE ASSETS, (IV) ANY ESTIMATES OF THE VALUE OF THE ASSETS OR FUTURE REVENUES GENERATED BY THE ASSETS, (V) THE ABILITY TO PRODUCE HYDROCARBONS FROM THE ASSETS, (VI) THE MAINTENANCE, REPAIR, CONDITION, QUALITY, SUITABILITY, DESIGN OR MARKETABILITY OF THE ASSETS, (VII) THE CONTENT, CHARACTER OR NATURE OF ANY INFORMATION MEMORANDUM, REPORTS, BROCHURES, CHARTS OR STATEMENTS PREPARED BY SM ENERGY OR THIRD PARTIES WITH RESPECT TO THE ASSETS, (VIII) ANY OTHER MATERIALS OR INFORMATION THAT MAY HAVE BEEN MADE AVAILABLE TO BUYER OR ANY BUYER’S REPRESENTATIVE IN CONNECTION WITH THE TRANSACTIONS CONTEMPLATED BY THIS AGREEMENT OR ANY DISCUSSION OR PRESENTATION RELATING THERETO AND (IX) ANY IMPLIED OR EXPRESS WARRANTY OF FREEDOM FROM PATENT OR TRADEMARK INFRINGEMENT. EXCEPT AS EXPRESSLY REPRESENTED OTHERWISE IN ARTICLE III, SM ENERGY FURTHER DISCLAIMS ANY REPRESENTATION OR WARRANTY, EXPRESS, STATUTORY OR IMPLIED, OF MERCHANTABILITY, FREEDOM FROM LATENT VICES OR DEFECTS, FITNESS FOR A PARTICULAR PURPOSE OR CONFORMITY TO MODELS OR SAMPLES OF MATERIALS OF ANY ASSETS, RIGHTS OF A PURCHASER UNDER APPROPRIATE STATUTES TO CLAIM DIMINUTION OF CONSIDERATION OR RETURN OF CONSIDERATION, IT BEING EXPRESSLY UNDERSTOOD AND AGREED BY THE PARTIES THAT BUYER SHALL BE DEEMED TO BE OBTAINING THE ASSETS IN THEIR PRESENT STATUS, CONDITION AND STATE OF REPAIR, “AS IS” AND “WHERE IS” WITH ALL FAULTS OR DEFECTS (KNOWN OR UNKNOWN, LATENT, DISCOVERABLE OR UNDISCOVERABLE), AND THAT BUYER HAS MADE OR CAUSED TO BE MADE SUCH INSPECTIONS AS BUYER DEEMS APPROPRIATE.

(c) OTHER THAN THOSE REPRESENTATIONS SET FORTH IN SECTION 3.12, SM ENERGY HAS NOT AND WILL NOT MAKE ANY REPRESENTATION OR WARRANTY REGARDING ANY MATTER OR CIRCUMSTANCE RELATING TO ENVIRONMENTAL LAWS, THE RELEASE OF MATERIALS INTO THE ENVIRONMENT OR THE PROTECTION OF HUMAN HEALTH, SAFETY, NATURAL RESOURCES OR THE ENVIRONMENT, OR ANY OTHER ENVIRONMENTAL CONDITION OF THE ASSETS, AND NOTHING IN THIS AGREEMENT OR OTHERWISE SHALL BE CONSTRUED AS SUCH A REPRESENTATION OR WARRANTY, AND SUBJECT TO BUYER’S LIMITED RIGHTS UNDER SECTION 7.1, AT CLOSING BUYER SHALL BE DEEMED TO BE TAKING THE ASSETS “AS IS” AND “WHERE IS” WITH ALL FAULTS FOR PURPOSES OF THEIR ENVIRONMENTAL CONDITION AND THAT BUYER HAS MADE OR CAUSED TO BE MADE SUCH ENVIRONMENTAL INSPECTIONS AS BUYER DEEMS APPROPRIATE.

(d) SM ENERGY AND BUYER AGREE THAT, TO THE EXTENT REQUIRED BY APPLICABLE LAW TO BE EFFECTIVE, THE DISCLAIMERS OF CERTAIN REPRESENTATIONS AND WARRANTIES CONTAINED IN THIS SECTION 5.3 ARE “CONSPICUOUS” DISCLAIMERS FOR THE PURPOSE OF ANY APPLICABLE LAW.

(e) NOTWITHSTANDING THE FOREGOING, NOTHING HEREIN SHALL RELIEVE SM ENERGY FOR ANY LIABILITY FOR KNOWING AND INTENTIONAL FRAUD, INTENTIONAL MISCONDUCT OR GROSS NEGLIGENCE.

Without limiting Buyer’s remedies for Title Defects set forth in this Article VI, except for the Subject Special Warranty, SM Energy makes no warranty or representation, express, implied, statutory or otherwise with respect to its title to any of the Assets and Buyer hereby acknowledges and agrees that Buyer’s sole remedy for any defect of title, including any Title Defect, with respect to any of the Assets shall be as set forth in Section 6.2.

(a) Title Defect Notices. On or before 4:00 p.m. (Mountain Time) on November 21, 2016 (the “Defect Claim Date”), Buyer shall have the right, but not the obligation, to deliver notices to SM Energy meeting the requirements of this Section 6.2(a) (each, a “Title Defect Notice”) setting forth any matters which, in Buyer’s reasonable opinion, constitute Title Defects and which Buyer asserts as a Title Defect pursuant to this Section 6.2. For all purposes of this Agreement and notwithstanding anything herein to the contrary, except with respect to the Subject Special Warranty and/or claims pursuant to Section 8.1 (solely as to matters occurring between the Execution Date and the Closing Date), Buyer shall be deemed to have waived, and SM Energy shall have no liability for, any Title Defect that Buyer fails to assert as a Title Defect pursuant to a Title Defect Notice delivered in material compliance with

this Section 6.2(a) and received by SM Energy on or before the Defect Claim Date. To be effective, each Title Defect Notice shall be in writing and shall include (i) a description of the alleged Title Defect and the Assets affected by such Title Defect (each a “Title Defect Property”), (ii) the Allocated Value of each Title Defect Property, (iii) supporting documents reasonably necessary for SM Energy to verify the existence of the alleged Title Defect(s), (iv) the amount by which Buyer reasonably believes the Allocated Value of each Title Defect Property is reduced by the alleged Title Defect(s), and (v) the computations upon which Buyer’s belief is based. To give SM Energy an opportunity to commence reviewing and curing Title Defects, Buyer agrees to use reasonable efforts to give SM Energy, on or before the end of each calendar week prior to the Defect Claim Date, written reports of alleged Title Defects discovered by Buyer during the preceding calendar week, which reports may be preliminary in nature and supplemented prior to the expiration of the applicable Defect Claim Date, provided that the failure to provide such reports shall not waive Buyer’s rights to provide a Title Defect Notice prior to the Defect Claim Date for any Title Defect. Buyer shall also promptly furnish SM Energy with written notice of any Title Benefit that is discovered by Buyer or any Buyer’s Representative while conducting Buyer’s due diligence with respect to the Assets prior to the Defect Claim Date.

(b) Title Benefit Notices. SM Energy shall have the right, but not the obligation, to deliver to Buyer on or before the Defect Claim Date, a notice setting forth any matters that, in SM Energy’s reasonable opinion, constitute Title Benefits and that SM Energy asserts as a Title Benefit pursuant to this Section 6.2 (each, a “Title Benefit Notice”) including a description of the Title Benefit and the Assets affected by the Title Benefit (the “Title Benefit Property”), the amount by which SM Energy reasonably believes the Allocated Value of the Title Benefit Property is increased by the Title Benefit, (iii) supporting documents reasonably necessary for Buyer to verify the existence of the alleged Title Benefit and (iv) the computations upon which SM Energy’s belief is based. SM Energy shall be deemed to have waived all Title Benefits of which it, or Buyer pursuant to Section 6.2(a), has not given notice on or before the Defect Claim Date.

(c) Remedies for Title Defects. Subject to SM Energy’s continuing right to dispute the existence of a Title Defect or the Title Defect Amount asserted with respect thereto and subject to the Individual Title Defect Threshold and the Aggregate Deductible, in the event that any Title Defect properly asserted by Buyer in accordance with Section 6.2(a) is not waived in writing by Buyer or cured on or before Closing, SM Energy shall, at its sole option, elect to:

(i) transfer, convey and assign the entirety of the Title Defect Property that is subject to such Title Defect, together with all associated Assets, to Buyer at Closing, and reduce the Purchase Price by the Title Defect Amount;

(ii) transfer, convey and assign the entirety of the Title Defect Property that is subject to such Title Defect, together with all associated Assets, to Buyer at Closing, in which event SM Energy shall have the right, for a period of 110 days following the Closing Date (such period, the “Cure Period”), to cure any Title Defect relating to such retained Title Defect Property, and should SM Energy cure such Title Defect during the Cure Period, then the Purchase Price shall not be adjusted. If SM Energy is unable to cure any such Title Defect during the Cure Period, then the Purchase Price shall be reduced by an amount equal to the Title Defect Amount;

(iii) if agreed to by Buyer in writing, transfer, convey and assign the entirety of the Title Defect Property that is subject to such Title Defect, together with all associated Assets, to Buyer at Closing, and indemnify Buyer against all Liability resulting from such Title Defect with respect to the Assets pursuant to an indemnity agreement mutually agreeable to the Parties; or

(iv) at Closing, retain the entirety of the Title Defect Property that is subject to such Title Defect, together with all associated Assets and all rights to operate such retained Assets, and reduce the Purchase Price by an amount equal to the Allocated Value of such Title Defect Property and associated Assets;

provided, however, if a Title Defect is a “most favored nations” clause in a Lease, or related to an Unreviewed Material Contract, then Buyer’s sole and exclusive remedy for such Title Defect shall be to exclude the affected Leases or Assets, and all associated Assets, in which case the provisions of Section 6.2(c)(iv) shall apply.

(d) Remedies for Title Benefits. With respect to each Well or Well Location affected by Title Benefits reported under this Section 6.2, the aggregate Title Defect Amounts shall be decreased by an amount equal to the increase in the Allocated Value for such Asset caused by such Title Benefits, as determined pursuant to Section 6.2(g) (the “Title Benefit Amount”). The Title Benefit Amounts may only be used to offset Title Defect Amounts and may not increase the Purchase Price.

(e) Exclusive Remedy. The provisions set forth in Section 6.2(c) and Section 6.2(i), shall be the exclusive right and remedy of Buyer with respect to SM Energy’s failure to have Defensible Title with respect to any Asset, except for the Subject Special Warranty and/or claims pursuant to Section 8.1 (solely as to matters occurring between the Execution Date and the Closing Date).

(f) Title Defect Amount. The amount by which the Allocated Value of the affected Title Defect Property is reduced as a result of the existence of such Title Defect shall be the “Title Defect Amount” and shall be determined in accordance with the following terms and conditions:

(i) if Buyer and SM Energy agree on the Title Defect Amount, then that amount shall be the Title Defect Amount;

(ii) if the Title Defect is an Encumbrance that is undisputed and liquidated in amount, then the Title Defect Amount shall be the amount necessary to be paid to remove the Title Defect from the Title Defect Property;

(iii) if the Title Defect represents a discrepancy between (A) the Net Revenue Interest for any Title Defect Property and (B) the Net Revenue Interest for such Title Defect Property stated in Exhibit B, and the Working Interest attributable to such Title Defect Property has been reduced proportionately, then the Title Defect Amount

shall be the product of the Allocated Value of such Title Defect Property multiplied by a fraction, the numerator of which is the positive difference between such Net Revenue Interest values, and the denominator of which is the Net Revenue Interest for such Title Defect Property stated in Exhibit B, provided that if the Net Revenue discrepancy does not affect the Title Defect Property throughout its entire life, the Title Defect Amount determined under this Section 6.2(f) shall be reduced to take into account the applicable time period only;

(iv) if the Title Defect represents an obligation or Encumbrance upon or other defect in title to the Title Defect Property of a type not described above, including a Title Defect that represents a discrepancy between (A) the Net Revenue Interest for any Title Defect Property and (B) the Net Revenue Interest for such Title Defect Property stated in Exhibit B, and the Working Interest attributable to such Title Defect Property has not been reduced proportionately, the applicable Title Defect Amount shall be determined by taking into account the Allocated Value of the Title Defect Property, the portion of the Title Defect Property affected by the Title Defect, the legal effect of the Title Defect, the potential economic effect of the Title Defect over the life of the Title Defect Property, the values placed upon the Title Defect by Buyer and SM Energy and such other reasonable factors as are necessary to make a proper evaluation;

(v) the Title Defect Amount with respect to a Title Defect Property shall be determined without duplication of any costs or losses included in any other Title Defect Amount hereunder; and

(vi) notwithstanding anything to the contrary in this Article VI, the aggregate Title Defect Amounts attributable to the effects of all Title Defects upon any single Title Defect Property shall not exceed the Allocated Value of such Title Defect Property, except (but subject to SM Energy’s rights under Sections 6.2(c)(ii), 6.2(c)(iii) and 6.2(c)(iv)) if a Title Defect is a lien, mortgage or deed of trust, the Title Defect Amount shall be the amount necessary to remove such mortgage, deed of trust or lien (provided that this exception shall not apply to mortgages, deeds of trust or liens granted by the lessors under the Leases, unless there is a default thereunder or foreclosure proceedings pursuant thereto).

(g) Title Benefit Amount. The Title Benefit Amount resulting from a Title Benefit shall be determined in accordance with the following methodology, terms and conditions:

(i) if Buyer and SM Energy agree on the Title Benefit Amount, then that amount shall be the Title Benefit Amount;

(ii) if the Title Benefit represents an increase between (A) the Net Revenue Interest for any Title Benefit Property and (B) the Net Revenue Interest for such Title Benefit Property stated in Exhibit B, and the Working Interest has increased proportionately, then the Title Benefit Amount shall be the product of the Allocated Value of such Title Benefit Property multiplied by a fraction, the numerator of which is

the positive difference between such Net Revenue Interest values, and the denominator of which is the Net Revenue Interest for such Title Benefit Property stated in Exhibit B, provided that if the Net Revenue increase does not affect the Title Benefit Property throughout its entire life, the Title Benefit Amount determined under this Section 6.2(g) shall be reduced to take into account the applicable time period only;

(iii) if the Title Benefit is of a type not described above, then the applicable Title Benefit Amount shall be determined by taking into account the Allocated Value of the Title Benefit Property, the portion of the Title Benefit Property affected by such Title Benefit, the legal effect of the Title Benefit, the potential economic effect of the Title Benefit over the life of such Title Benefit Property, the values placed upon the Title Benefit by Buyer and SM Energy and such other reasonable factors as are necessary to make a proper evaluation; and

(iv) the Title Benefit Amount with respect to a Title Benefit Property shall be determined without duplication of any items or amounts included in any other Title Benefit Amount hereunder.

(h) Title Threshold and Deductibles. Notwithstanding anything to the contrary, in no event shall there be any adjustments to the Purchase Price or other remedies provided by SM Energy hereunder or under the Assignment: (i) for any individual Title Defect for which the Title Defect Amount does not exceed the Individual Title Defect Threshold and (ii) for any Title Defect for which the Title Defect Amount exceeds the Individual Title Defect Threshold unless the sum of the aggregate Title Defect Amounts of all such Title Defects that exceed the Individual Title Defect Threshold (excluding any Title Defect Amounts attributable to Title Defects cured by SM Energy), exceeds the Aggregate Title Deductible, after which point Buyer shall be entitled to adjustments to the Purchase Price only with respect to such Title Defects in excess of the Aggregate Title Deductible. For the avoidance of doubt, if SM Energy elects to transfer, convey and assign any Title Defect Property pursuant to Section 6.2(c)(ii), the Purchase Price shall not be reduced by the Title Defect Amount of such Title Defect Property and the Title Defect Amount relating to such Title Defect Property will not be counted toward the Aggregate Title Deductible, unless SM Energy is unable to cure such Title Defect during the Cure Period, in which case the Purchase Price shall be adjusted as provided in Section 6.2(c)(ii). If a single Title Defect or series of related Title Defects affects several Well Locations in the same drilling or spacing unit, then such Title Defect(s) shall be deemed to have exceeded the Individual Title Defect Threshold if the total amount by which such Title Defect(s) reduce(s) the Allocated Value(s) of all the affected Well Locations exceed(s) the Individual Title Defect Threshold.

(i) Title Dispute Resolution. The Parties agree to resolve disputes concerning the following matters pursuant to this Section 6.2(i): (1) the existence and scope of a Title Defect or Title Defect Amount, (2) the adequacy of SM Energy’s Title Defect curative materials and Buyer’s reasonable satisfaction thereof and (3) the existence and scope of a Title Benefit or Title Benefit Amount (collectively, “Title Disputed Matters”). The Parties agree to attempt to initially resolve all disputes through good faith negotiations. If the Parties cannot resolve disputes regarding Title Disputed Matters, on or before Closing, the Closing shall be delayed as to only the Assets subject to the Title Disputed Matters until the Parties finally resolve the

dispute pursuant to this Section 6.2(i); provided, however, if either Party asserts that the condition in Section 9.1(d) or Section 9.2(d) has not been satisfied due, in whole or in part, to Title Defects, then the Parties will resolve all Title Disputed Matters pursuant to this Section 6.2(i) prior to Closing. In the event that neither Party asserts that the condition in Section 9.1(d) or Section 9.2(d) has not been satisfied, it is understood and agreed that the Parties shall proceed to Closing as contemplated herein as to all Assets not covered by a Title Disputed Matter. The Title Disputed Matters will be finally determined pursuant to this Section 6.2(i). There shall be a single arbitrator, who shall be an attorney with at least 10 years’ experience in oil and gas title and transactional matters, as selected by mutual agreement of Buyer and SM Energy within 15 days after any Party invokes the provisions of this Section 6.2(i) to resolve such Dispute, and absent such agreement, by the Houston office of the AAA (the “Title Arbitrator”). The arbitration proceeding shall be held in Houston, Texas and shall be conducted in accordance with the AAA Rules to the extent such rules do not conflict with the terms of this Section 6.2(i). The Title Arbitrator’s determination shall be made within 20 days after submission by the Parties of the matters in Dispute and shall be final and binding upon both Parties, without right of appeal. In making his determination, the Title Arbitrator shall be bound by the rules set forth in Section 6.2(f) and Section 6.2(g) and, subject to the foregoing, may consider such other matters as in the opinion of the Title Arbitrator are necessary to make a proper determination. The Title Arbitrator, however, may not award (a) Buyer a greater Title Defect Amount than the Title Defect Amount claimed by Buyer in the applicable Title Defect Notice (which such Title Defect Amount shall not exceed the Allocated Value of the applicable Title Defect Property) or (b) SM Energy a greater Title Benefit Amount than the Title Benefit Amount claimed by SM Energy in the applicable Title Benefit Notice. The Title Arbitrator shall act as an expert for the limited purpose of determining the specific disputed Title Defect, Title Benefit, Title Defect Amount or Title Benefit Amount submitted by either Party and may not award damages, interest or penalties to either Party with respect to any Dispute. SM Energy and Buyer shall each bear its own legal fees and other costs of presenting its case to the Title Arbitrator. Each of SM Energy and Buyer shall bear one-half of the costs and expenses of the Title Arbitrator. To the extent that the award of the Title Arbitrator with respect to any Title Defect Amount or Title Benefit Amount was not taken into account as an adjustment to the Purchase Price or the aggregate Title Defect Amounts, as applicable at Closing pursuant to Section 2.4 and an adjustment would otherwise be required under the provisions of Section 6.2(c) or Section 6.2(d), as applicable, then, within 10 days after the Title Arbitrator delivers written notice to Buyer and SM Energy of its award with respect to such Title Defect Amount or a Title Benefit Amount and subject to Section 6.2(h), the Purchase Price will be adjusted pursuant to Section 2.4 by the amount so awarded by the Title Arbitrator.

(a) Notwithstanding anything herein to the contrary, from and after the Effective Time, if Closing occurs, Buyer shall assume all risk of loss with respect to (i) production of Hydrocarbons from the Assets through normal depletion (including watering out of any well, collapsed casing or sand infiltration of any well) and (ii) the depreciation of personal property due to ordinary wear and tear and, in each case, Buyer shall not assert such matters as Casualty Losses or Title Defects hereunder.

(b) If, from and after the Effective Time but prior to the Closing Date, any portion of the Assets is damaged or destroyed by fire or other casualty or is taken in

condemnation or under right of eminent domain (a “Casualty Loss”), and the resulting loss from such Casualty Loss exceeds $100,000 based on the Allocated Value of the affected Assets, then (i) Buyer shall nevertheless be required to close the transactions contemplated by this Agreement and (ii) SM Energy shall elect by written notice to Buyer prior to Closing to either (A) cause, at SM Energy’s sole cost and as promptly as reasonably practicable (which work may extend after the Closing Date), each Asset affected by such Casualty Loss to be repaired or restored to at least its condition prior to such casualty or taking, or (B) reduce the Purchase Price by the cost to repair or restore each Asset affected by such Casualty Loss to at least its condition prior to such casualty or taking. In each case, SM Energy shall retain all rights to insurance, condemnation awards and other claims against third parties with respect to the casualty or taking except to the extent the Parties otherwise agree in writing.

(a) All consents to assign relating to the Assets (“Consents”) and preferential rights to purchase (“Preferential Rights”) are listed on Schedule 6.4. The remedies set forth in this Section 6.4 are the exclusive remedies under this Agreement related to the Consents and Preferential Rights.

(b) From and after the Execution Date up to Closing, SM Energy shall use its commercially reasonable efforts (with the cooperation of Buyer) to obtain all Consents and waivers of all Preferential Rights (excluding any Customary Post-Closing Consents); provided, however, that neither Party shall be required to incur any Liability or pay any money in order to obtain such Consents or waivers.

(c) Preferential Rights. SM Energy shall, within 10 days after the Execution Date, send to each holder of a Preferential Right a notice requesting the election or waiver by each such holder of its applicable Preferential Right, in each case in material compliance with the contractual provisions applicable to such Preferential Right, requesting a waiver of such right. Any Preferential Right must be exercised subject to all terms and conditions set forth in this Agreement, including the successful Closing of this Agreement pursuant to Article XI. The consideration payable under this Agreement for any particular Asset for purposes of Preferential Right notices shall be the Allocated Value of such Asset.

(i) All Assets burdened by Preferential Rights for which (A) the applicable Preferential Right has been waived, or (B) the period to exercise such Preferential Right has expired prior to the Closing without the applicable holder of such Preferential Right electing to enforce its Preferential Right, shall, in each case, be assigned to Buyer at the Closing pursuant to the provisions of this Agreement.

(ii) If, prior to the Closing (A) any holder of a Preferential Right notifies SM Energy that it intends to consummate the purchase of the portion of the Assets to which its Preferential Right applies or (B) the time for exercising a Preferential Right has not expired and the holder of such Preferential Right has not waived such Preferential Right, then, in each case, such portion of the Assets affected by such Preferential Right shall be excluded from the Assets to be conveyed to Buyer at Closing and the Purchase Price shall be reduced by the Allocated Value of such excluded portion

of the Assets. SM Energy shall be entitled to all proceeds paid by a Person exercising a Preferential Right prior to the Closing. If, after the Closing but prior to the date of final settlement of the Purchase Price under Section 2.6, (1) such holder of such Preferential Right thereafter fails to consummate the purchase of the portion of the Assets covered by such Preferential Right or (2) the time for exercising such Preferential Right expires without exercise by the holder thereof, then SM Energy shall (x) so notify Buyer and (y) on or before 10 days following delivery of such notice, assign such portion of the Assets to Buyer pursuant to an assignment in substantially the form of the Assignment and the Purchase Price shall be increased by an amount equal to the Allocated Value of such portion of the Assets.

(d) Consents. SM Energy, within 10 days after the Execution Date, shall send to each holder of a Consent a notice seeking such holder’s consent to the transactions contemplated hereby.

(i) If (A) SM Energy fails to obtain a Consent prior to Closing and the failure to obtain such Consent would cause (1) the assignment to Buyer of any portion of the Assets to be void or expose Buyer to material damages or (2) the termination of a Lease under the express terms thereof or (B) a Consent requested by SM Energy is denied in writing, then, in each case, that portion of the Assets affected by such Consent shall be excluded from the Assets to be conveyed to Buyer at Closing and the Purchase Price shall be reduced by the Allocated Value of such portion of the Assets. In the event that a Consent that was not obtained prior to Closing is obtained following Closing but prior to the final settlement of the Purchase Price under Section 2.6 or the requirement to obtain such Consent is waived by Buyer then, within 10 days after such Consent is obtained or the requirement to obtain such Consent is waived by Buyer, (x) SM Energy shall assign such excluded portion of the Assets to Buyer pursuant to an assignment in substantially the form of the Assignment (and if the requirement to obtain a Consent is waived by Buyer, Buyer shall have no claim against, and SM Energy shall have no Liability for, the failure to obtain such Consent), and (y) Buyer shall pay to SM Energy by wire transfer of immediately available funds an amount equal to the Allocated Value of such portion of the Assets so assigned.

(ii) If (A) SM Energy fails to obtain a Consent prior to Closing and the failure to obtain such Consent would not cause (1) the assignment to Buyer of any portion of the Assets to be void or expose Buyer to material damages or (2) the termination of a Lease under the express terms thereof and (B) such Consent requested by SM Energy is not denied in writing, then that portion of the Assets subject to such Consent shall be assigned by SM Energy to Buyer at Closing pursuant to the Assignment and Buyer shall have no claim against, and SM Energy shall have no Liability for, the failure to obtain such Consent.

(a) Environmental Defects Notice. On or before the Defect Claim Date, Buyer shall have the right, but not the obligation, to deliver notices to SM Energy materially meeting the requirements of this Section 7.1(a) (each, an “Environmental Defect Notice”) setting forth any matters that, in Buyer’s reasonable opinion, constitute Environmental Defects and that Buyer asserts as Environmental Defects pursuant to this Section 7.1. For all purposes of this Agreement, Buyer shall be deemed to have waived any Environmental Defect that Buyer fails to properly assert as an Environmental Defect pursuant to an Environmental Defect Notice delivered in accordance with this Section 7.1(a) and received by SM Energy on or before the Defect Claim Date, except for claims relating to a breach of Section 3.12, or claims pursuant to Section 8.1 (solely as to matters occurring between the Execution Date and the Closing Date), Section 13.2(d), and/or Section 13.2(g). To be effective, each Environmental Defect Notice shall be in writing and shall include: (i) a description of the Environmental Condition constituting the alleged Environmental Defect, including the Environmental Law(s) violated by such Environmental Defect, (ii) each Asset (or portion thereof) affected by the alleged Environmental Defect (the “Environmental Defect Property”), (iii) the Allocated Value of each Environmental Defect Property, (iv) supporting documents in the possession of Buyer reasonably necessary for SM Energy to verify the existence of the alleged Environmental Defect, and (v) a calculation of the Remediation Amount (itemized in reasonable detail) that Buyer asserts is attributable to such alleged Environmental Defect. Buyer’s calculation of the Remediation Amount included in the Environmental Defect Notice must describe in reasonable detail the Remediation proposed for the Environmental Condition that gives rise to the asserted Environmental Defect and identify all assumptions used by Buyer in calculating the Remediation Amount, including the standards that Buyer asserts must be met to comply with Environmental Laws. SM Energy shall have the right, but not the obligation, to cure any claimed Environmental Defect on or before Closing. To give SM Energy an opportunity to commence reviewing and curing Environmental Defects, Buyer agrees to use reasonable efforts to give SM Energy, on or before the end of each calendar week prior to the Defect Claim Date, written report of all alleged Environmental Defects discovered by Buyer during the preceding calendar week, which reports may be preliminary in nature and supplemented prior to the expiration of the applicable Defect Claim Date, provided, however, that the failure to provide such reports shall not waive Buyer’s rights to provide an Environmental Defect Notice prior to the Defect Claim Date for any Environmental Defect, unless Buyer’s failure materially prejudices SM Energy’s ability to cure an Environmental Defect prior to Closing.

(b) Remedies for Environmental Defects. Subject to SM Energy’s continuing right to dispute the existence of an Environmental Defect or the Remediation Amount asserted with respect thereto and subject to the Individual Environmental Threshold and the Aggregate Deductible, in the event that any Environmental Defect timely asserted by Buyer in accordance with Section 7.1(a) is not waived in writing by Buyer or cured on or before Closing, SM Energy shall, at its sole option, elect to:

(i) reduce the Purchase Price by the Remediation Amount for such Environmental Defect;

(ii) retain the entirety of the Environmental Defect Property subject to such Environmental Defect, together with all associated Assets, and reduce the Purchase Price by an amount equal to the Allocated Value of the Environmental Defect Property and associated Assets; or

(iii) with the prior written consent of Buyer, indemnify Buyer against all Liability resulting from such Environmental Defect with respect to the Assets pursuant to an indemnity agreement in a form mutually agreeable to the Parties.

If SM Energy elects the option set forth in clause (i) above, Buyer shall be deemed to have assumed responsibility for all costs and expenses attributable to the Remediation of the applicable Environmental Defect (net to the Assets) and all Liabilities (net to the Assets) with respect thereto, and Buyer’s obligations with respect to the foregoing shall be deemed to constitute part of the Assumed Obligations.

(c) Exclusive Remedy. Subject to Buyer’s remedy for a breach of SM Energy’s representation contained in Section 3.12 or for claims pursuant to Section 8.1 (solely as to matters occurring between the Execution Date and the Closing Date), Section 13.2(d) or 13.2(g), Section 7.1(b) shall be the exclusive right and remedy of Buyer with respect to any Environmental Defect.

(d) Environmental Deductibles. Notwithstanding anything to the contrary, in no event shall there be any adjustments to the Purchase Price or other remedies provided by SM Energy for (i) any individual Environmental Defect for which the Remediation Amount does not exceed the Individual Environmental Threshold, or (ii) any Environmental Defect for which the Remediation Amount exceeds the Individual Environmental Threshold, unless the sum of (A) the aggregate Remediation Amounts of all such Environmental Defects that exceed the Individual Environmental Threshold (excluding any Remediation Amounts attributable to (1) Environmental Defects cured by SM Energy or (2) Environmental Defect Properties that SM Energy elects to retain pursuant to Section 7.1(b)(ii)), exceeds the Aggregate Environmental Deductible, after which point Buyer shall only be entitled to adjustments to the Purchase Price with respect to such Environmental Defects in excess of the Aggregate Environmental Deductible. For the avoidance of doubt, if SM Energy elects to retain any Asset pursuant to Section 7.1(b)(ii), the Purchase Price shall be reduced by the Allocated Value of such retained Asset and the Remediation Amount for the Environmental Defect relating to such retained Asset will not be counted towards the Aggregate Environmental Deductible. If a single Environmental Defect or series of related Environmental Defects affects several Well Locations in the same drilling or spacing unit, then such Environmental Defect(s) shall be deemed to have exceeded the Individual Environmental Threshold if the total amount by which such Environmental Defect(s) reduce(s) the Allocated Value(s) of all the affected Well Locations exceed(s) the Individual Environment Threshold.

(e) Environmental Dispute Resolution. The Parties agree to resolve disputes concerning the existence and scope of an Environmental Defect or Remediation Amount

pursuant to this Section 7.1(e) (the “Environmental Disputed Matters”). The Parties agree to attempt to initially resolve all disputes through good faith negotiations. If the Parties cannot resolve disputes regarding Environmental Disputed Matters on or before Closing, the Closing shall be delayed as to only the Assets subject to the Environmental Disputed Matters until the Parties finally resolve the dispute pursuant to this Section 7.1(e); provided, however, if either Party asserts that the condition in Section 9.1(d) or Section 9.2(d) has not been satisfied due, in whole or in part, to Environmental Defects, then the Parties will resolve all Environmental Disputed Matters pursuant to this Section 7.1(e) prior to Closing. In the event that neither Party asserts that the condition in Section 9.1(d) or Section 9.2(d) has not been satisfied, it is understood and agreed that the Parties shall proceed to Closing as contemplated herein as to all Assets not covered by an Environmental Disputed Matter. The Environmental Disputed Matters will be finally determined pursuant to this Section 7.1(e). There will be a single arbitrator, who must be an environmental attorney with at least 10 years’ experience in environmental matters involving oil and gas properties, as selected by mutual agreement of Buyer and SM Energy within 15 days after any Party invokes the provisions of this Section 7.1(e) to resolve such Dispute, and absent such agreement, by the Houston office of the AAA (the “Environmental Arbitrator”). The arbitration proceeding will be held in Houston, Texas and conducted in accordance with the AAA Rules to the extent such rules do not conflict with the terms of this Section 7.1(e). The Environmental Arbitrator’s determination must be made within 20 days after submission of the matters in Dispute and shall be final and binding upon both Parties, without right of appeal. In making its determination, the Environmental Arbitrator shall be bound by the rules set forth in this Section 7.1 and, subject to the foregoing, may consider such other matters as in the opinion of the Environmental Arbitrator are necessary or helpful to make a proper determination. The Environmental Arbitrator, however, may not award Buyer a greater Remediation Amount than the Remediation Amount claimed by Buyer in the applicable Environmental Defect Notice (which such award shall not exceed the Allocated Value of the applicable Environmental Defect Property). The Environmental Arbitrator will act as an expert for the limited purpose of determining the specific disputed Environmental Defects and/or Remediation Amounts submitted by either Party and may not award damages, interest or penalties to either Party with respect to any matter. SM Energy and Buyer will each bear its own legal fees and other costs of presenting its case. Each Party will bear one-half of the costs and expenses of the Environmental Arbitrator. To the extent that the award of the Environmental Arbitrator with respect to any Remediation Amount is not taken into account as an adjustment to the Purchase Price at Closing pursuant to Section 2.4 and Buyer would otherwise be entitled to an adjustment under the provisions of Section 7.1(d), then, within 10 days after the Environmental Arbitrator delivers written notice to Buyer and SM Energy of such award and subject to Section 7.1(d), the Purchase Price will be adjusted pursuant to Section 2.4 by such Remediation Amount.

Buyer acknowledges that the Assets have been used for exploration, development and production of oil and gas and that there may be petroleum, produced water, wastes or other substances or materials located in, on or under or associated with the Assets. Equipment and sites included in the Assets may contain asbestos, NORM or other Hazardous Substances. NORM may affix or attach itself to the inside of wells, materials and equipment as scale, or in other forms. The wells, materials and equipment located on the Assets or included in the Assets may contain

NORM and other wastes or Hazardous Substances. NORM containing material or other wastes or Hazardous Substances may have come in contact with various environmental media, including without limitation, water, soils or sediment. Special procedures may be required for the assessment, remediation, removal, transportation or disposal of environmental media, wastes, asbestos, NORM and other Hazardous Substances from the Assets.

Except (x) as set forth in Schedule 8.1, (y) as expressly contemplated by this Agreement or (z) as expressly consented to in writing by Buyer, SM Energy agrees that from and after the Execution Date up to Closing:

(i) maintain, and if SM Energy is the Operator thereof, operate, the Assets in the usual, regular and ordinary manner consistent with its past practice;

(ii) maintain insurance coverage on the Assets presently furnished by nonaffiliated third parties in the amounts and of the types presently in force;

(iii) maintain the books of account and records relating to the Assets in the usual, regular and ordinary manner, in accordance with its usual accounting practices;

(iv) give written notice to Buyer as soon as is practicable of any written notice received or given by SM Energy with respect to any alleged material breach by SM Energy of any Lease or Material Contract; and

(v) timely pay or cause to be paid (or dispute in good faith) all bonuses and rentals, royalties, overriding royalties, shut-in royalties, minimum royalties and development and operating expenses, Taxes, Transfer Taxes, renewal and extension payments required in respect of the Assets, and all other payments or expenses incurred with respect to the Assets in the ordinary course of business and consistent with past practice, and perform all other acts that are necessary to maintain SM Energy’s rights in and to the Assets in full force and effect until the Closing.

(i) except for (A) emergency operations, (B) operations required under presently existing AFEs described on Schedule 3.11, (C) operations undertaken to avoid any penalty provision of any Applicable Contract or Governmental Authority order, and (D) operations proposed by third parties relating to drilling, sidetracking, reworking or other similar operations with respect to the Assets operated by third parties, agree to, propose or commence any operations on the Assets anticipated to cost (net to the Assets) in excess of $100,000 per operation; provided that with respect to emergency operations, SM Energy shall notify Buyer of such emergency as soon as reasonably practicable;

(ii) enter into an Applicable Contract that, if entered into prior to the Execution Date, would be required to be listed in Schedule 3.7(a),

(iii) terminate (unless such Material Contract terminates pursuant to its stated terms) or materially amend the terms of any Material Contract;

(iv) settle any Proceeding or waive any material claims or rights of material value in each case attributable to the Assets and effecting the period after the Effective Time;

(v) transfer, sell, mortgage, pledge or dispose of any material portion of the Assets other than the sale or disposal of Hydrocarbons in the ordinary course of business and sales of equipment that is no longer necessary in the operation of the Assets or for which replacement equipment of equal or greater value has been obtained; or

Buyer acknowledges that SM Energy owns undivided interests in certain of the Assets with respect to which it is not the Operator, and Buyer agrees that the acts or omissions of the other Working Interests owners (including the Third Party Operators) who are not SM Energy shall not constitute a breach of the provisions of this Section 8.1, and no action required pursuant to a vote of Working Interest owners shall constitute a breach of the provisions of this Section 8.1 so long as SM Energy voted its interest in such a manner that complies with the provisions of this Section 8.1.

Buyer acknowledges that none of the bonds, letters of credit and guarantees, if any, posted by SM Energy or its Affiliates with Governmental Authorities and relating to the Assets are transferable to Buyer. At or prior to Closing, Buyer shall deliver to SM Energy evidence of the posting of bonds or other security with all applicable Governmental Authorities meeting the requirements of such Governmental Authorities to own the Assets.

The provisions of this Agreement relating to representations, warranties, indemnities and agreements of the Parties shall not be altered or modified by Buyer’s knowledge or SM Energy’s Knowledge, as applicable, of any event or Buyer’s or SM Energy’s review of any documents or other matters except as expressly provided herein to the contrary.

(a) From and after the Execution Date, SM Energy shall cooperate with Buyer, its Affiliates and Buyer’s and its Affiliate’s auditors (“Buyer’s Auditors”) in connection with the preparation of any financial statements of Buyer or pertaining to the Assets and any

related pro forma financial statements or other financial information, and the conduct of audits or reviews of such financial statements, required under federal securities Laws or rules and regulations of the Securities and Exchange Commission (“SEC”) or under customary practice for securities offerings made pursuant to Rule 144A under the Securities Act of 1933, as amended (the “Securities Act”), in connection with (a) any filing by Buyer or any of its Affiliates with the SEC pursuant to the Securities Act or the Securities Exchange Act of 1934, as amended, or (b) any offering memorandum or similar document relating to a private offering of securities of Buyer or its Affiliates pursuant to Rule 144A under the Securities Act or otherwise. In connection with such cooperation, from and after the Execution Date, SM Energy shall: (i) provide to Buyer, its Affiliates, and Buyer’s Auditors reasonable access to the books, records, information, and documents that are related to the Assets and SM Energy that are in SM Energy’s possession or control reasonably required by Buyer, its Affiliates, and Buyer’s Auditors in order to prepare, audit, and review such financial statements and other financial information; (ii) provide to Buyer, its Affiliates, and Buyer’s Auditors reasonable access to SM Energy’s officers, managers, employees, agents, and representatives who were responsible for preparing or maintaining the financial records and work papers and other supporting documents used in the preparation of such financial statements; (iii) deliver one or more customary representation letters from SM Energy to such Buyer’s Auditors that are reasonably requested to allow such Buyer’s Auditors to complete an audit or review of any such financial statements and to issue an opinion acceptable to such Buyer’s Auditors with respect to an audit or review of such financial statements; and (iv) use its reasonable best efforts to obtain the consent of the independent auditor of SM Energy that conducted any audit of such financial statements to the use of such independent auditor’s report, and to be named as an expert or as having prepared such report, in any SEC filing or offering memorandum or similar document referred to above.

(b) All of the information provided by SM Energy pursuant to this Section 8.4 is given without any representation or warranty, express or implied, and no member of the SM Indemnified Parties or SM Energy’s auditors shall have any liability or responsibility with respect thereto. Buyer, for itself and for each member of the Buyer Indemnified Parties, hereby releases, remises, and forever discharges each member of the SM Indemnified Parties and SM Energy’s auditors from any and all Proceedings, and Losses whatsoever, in law or in equity, known or unknown, which any member of the Buyer Indemnified Parties might now or subsequently may have, based on, relating to, or arising out of SM Energy’s obligations and actions pursuant to this Section 8.4, except to the extent that such Proceedings, or Liabilities resulted from willful misconduct of any SM Indemnified Party. From and after Closing, Buyer shall indemnify, defend, and hold harmless the SM Indemnified Parties and SM Energy’s auditors from and against any and all Losses arising out of or relating to SM Energy’s obligations and actions pursuant to this Section 8.4, EVEN IF CAUSED IN WHOLE OR IN PART BY THE NEGLIGENCE (WHETHER SOLE, JOINT, OR CONCURRENT), STRICT LIABILITY, OR OTHER LEGAL FAULT OF ANY INDEMNIFIED PERSON, EXCEPT TO THE EXTENT THAT SUCH LOSSES RESULTED FROM THE WILLFUL MISCONDUCT OF ANY SM INDEMNIFIED PARTY.

The obligations of Buyer to consummate the transactions contemplated by this Agreement are subject to the fulfillment (or waiver by Buyer) on or prior to the Closing of each of the following conditions:

(a) Representations. The representations and warranties of SM Energy set forth in Article III shall be true and correct in all respects (other than those representations and warranties of SM Energy that are qualified by materiality, which shall be true and correct in all respects) as of the Closing Date as though made on and as of the Closing Date (other than representations and warranties that refer to a specified date, which need only be true and correct on and as of such specified date), except for those breaches, if any, of such representations and warranties that in the aggregate would not have a Material Adverse Effect.

(b) Performance. SM Energy shall have materially performed or complied with all obligations, agreements and covenants contained in this Agreement as to which performance or compliance by SM Energy is required prior to or at the Closing Date.

(c) No Legal Proceedings. No material Proceeding instituted by a third party shall be pending before any Governmental Authority seeking to restrain, prohibit, enjoin or declare illegal, or seeking substantial damages in connection with, the transactions contemplated by this Agreement. No order, award or judgment shall have been issued by any Governmental Authority or arbitrator to restrain, prohibit, enjoin, or declare illegal, or awarding substantial damages in connection with, the transactions contemplated by this Agreement.

(d) Title Defects; Environmental Defects; Preferential Rights; Consents; Casualty Losses. The sum of (i) all (A) Title Defect Amounts determined under Section 6.2(c)(i), plus (B) all potential adjustments to the Purchase Price pursuant to Section 6.2(c)(ii) if SM Energy were to fail to cure all of the applicable Title Defects not cured as of the Closing in accordance with such section within the Cure Period, less (C) all Title Benefit Amounts determined under Section 6.2(g), plus (ii) all (A) Remediation Amounts for Environmental Defects determined under Section 7.1(b)(i), plus (B) all adjustments to the Purchase Price pursuant to Section 7.1(b)(ii), plus (iii) all adjustments to the Purchase Price made pursuant to Section 6.4(c)(ii) as a result of un-waived or unexpired Preferential Rights and Section 6.4(d)(i) in respect of unobtained or denied Consents, plus (iv) the amount of all Casualty Losses pursuant to Section 6.3 shall, in the aggregate, be less than 15% of the unadjusted aggregate Purchase Price.

(e) Closing Deliverables. SM Energy shall have delivered (or be ready, willing and able to deliver at Closing) to Buyer the documents and other items required to be delivered by SM Energy under Section 11.3.

The obligations of SM Energy to consummate the transactions contemplated by this Agreement are subject to the fulfillment (or waiver by SM Energy) on or prior to the Closing of each of the following conditions:

(a) Representations. The representations and warranties of Buyer set forth in Article IV shall be true and correct in all material respects (other than those representations and warranties of Buyer that are qualified by materiality, which shall be true and correct in all respects) as of the Closing Date as though made on and as of the Closing Date (other than representations and warranties that refer to a specified date, which need only be true and correct on and as of such specified date).

(b) Performance. Buyer shall have materially performed or complied with all obligations, agreements and covenants contained in this Agreement as to which performance or compliance by Buyer is required prior to or at the Closing Date.

(e) Closing Deliverables. Buyer shall have delivered (or be ready, willing and able to deliver at Closing) to SM Energy the documents and other items required to be delivered by Buyer under Section 11.3.

Subject to the treatment of ad valorem Taxes provided below, all Asset Taxes shall be allocated between Buyer and SM Energy as of the Effective Time for all taxable periods that include the Effective Time. All Asset Taxes that are not ad valorem taxes shall be allocated to SM Energy to the extent they relate to production prior to the Effective Time and to Buyer to the extent they

relate to production on or after the Effective Time. No liability for Asset Taxes shall duplicate an adjustment to Purchase Price made pursuant to Section 2.4. Ad valorem Taxes for each assessment period shall be allocated to SM Energy based on the percentage of the assessment period occurring before the Effective Time and to Buyer based on the percentage of the assessment period occurring on or after the Effective Time. Each Party shall promptly furnish to the other copies of any Asset Tax assessments and statements (or invoices therefor from the operator of the Assets) received by it to the extent such assessment, statement, or invoice relates to an Asset Tax allocable to the other Party under this Section 10.1. Each Party shall timely pay all Asset Taxes subject to allocation under this Section and shall furnish to the other Party evidence of such payment. The Parties shall estimate all Asset Taxes that are attributable to the ownership or operation of the Assets through the Closing Date and all Subject Transfer Taxes and incorporate such estimates into the Preliminary Settlement Statement. The actual amounts (to the extent the actual amounts differ from the estimates included in the Preliminary Settlement Statement and are known at the time of the Final Settlement Statement) shall be accounted for in the Final Settlement Statement. If the actual amounts are not known at the time of the Final Settlement Statement, the amounts shall be re-estimated based on the best information available at the time of the Final Settlement Statement. When the actual amounts are known, Buyer or SM Energy shall make such payments to the other (if any) as are necessary to effect the allocation of Taxes described in this Section 10.1.

All sales, use or other Taxes (other than Taxes on gross income, net income or gross receipts), duties, levies, recording fees or other governmental charges incurred by or imposed with respect to the property transfers undertaken pursuant to this Agreement (“Subject Transfer Taxes”) shall be the responsibility of, and shall be paid by, Buyer. The Parties shall reasonably cooperate in taking steps that would minimize or eliminate any Subject Transfer Taxes. Buyer agrees to file all Subject Transfer Tax Returns relating to such Subject Transfer Taxes.

For Asset Tax periods in which the Effective Time occurs, SM Energy agrees to immediately forward to Buyer copies of any Asset Tax reports and Tax Returns received or filed by SM Energy after the Closing and provide Buyer with any information SM Energy has that is reasonably necessary for Buyer to file any required Tax Return related to the Assets. Buyer agrees to file all Tax Returns and reports applicable to the Assets that Buyer is required to file after the Closing and, subject to the provisions of Section 10.1, to pay all required Asset Taxes payable with respect to the Assets.

Buyer and SM Energy shall cooperate fully as and to the extent reasonably requested by the other party, in connection with the filing of any Tax Returns and any audit, litigation or other proceeding (each, a “Tax Proceeding”) with respect to Taxes relating to or in connection with the Assets. Such cooperation shall include the retention and (upon the other Party’s request) the provision of such records and information which are reasonably relevant to any such Tax Return or Tax Proceeding and making employees available on a mutually convenient basis to provide additional information and explanation of any material provided hereunder.

Buyer and SM Energy agree to treat any payment made pursuant to the indemnification provisions of this Agreement as an adjustment to the Purchase Price for Tax purposes.

Subject to the conditions stated in this Agreement, the transfer by SM Energy and the acceptance by Buyer of the Assets (the “Closing”) shall occur on December 1, 2016 or, if all conditions to Closing in Article IX (other than those conditions that are only capable of being satisfied at the Closing) have not yet been satisfied or waived by that date, five (5) Business Days after such conditions have been satisfied or waived, or such other date as Buyer and SM Energy may agree upon in writing. The date when Closing actually occurs shall be the “Closing Date.”

Closing shall be held at the offices of SM Energy, at 1775 Sherman Street, Suite 1200, Denver, CO 80203 or such other location as Buyer and SM Energy may agree upon in writing.

At Closing, the following documents shall be delivered and the following events shall occur, the execution of each document and the occurrence of each event being a condition precedent to the others and each being deemed to have occurred simultaneously with the others:

(a) SM Energy and Buyer shall execute and deliver the Assignment, in sufficient counterparts to facilitate recording in the applicable counties where the Assets are located;

(b) SM Energy and Buyer shall execute and deliver assignments, on appropriate forms, of state and of federal leases comprising portions of the Assets, if any;

(d) Buyer shall deliver to SM Energy, to the accounts designated in the Preliminary Settlement Statement, by direct bank or wire transfer in same day funds, the Closing Amount, and the Parties shall execute joint written instructions to the Escrow Agent to deliver the Deposit to SM Energy;

(e) SM Energy shall deliver on forms supplied by Buyer (and reasonably acceptable to SM Energy) transfer orders or letters in lieu thereof directing all purchasers of

production to make payment to Buyer of proceeds attributable to Hydrocarbon production from the Assets from and after the Effective Time, for delivery by Buyer to each purchaser of such Hydrocarbon production;

(f) SM Energy shall deliver an executed statement described in Treasury Regulation § 1.1445-2(b)(2) certifying that SM Energy is not a “foreign person” or a “disregarded entity”;

(g) Buyer shall execute and deliver a certificate from an authorized officer of Buyer certifying on behalf of Buyer that the conditions set forth in Section 9.2(a) and Section 9.2(b) have been fulfilled by Buyer;

(h) SM Energy shall execute and deliver a certificate from an authorized officer of SM Energy certifying on behalf of SM Energy that the conditions set forth in Section 9.1(a) and Section 9.1(b) have been fulfilled by SM Energy;

(i) SM Energy shall deliver a recordable release of any trust, mortgages, financing statements, fixture filings and security agreements made by SM Energy or its Affiliates affecting the Assets;

(k) SM Energy and Buyer shall execute and deliver the Transition Services Agreement in the form attached hereto as Exhibit G; and

(l) SM Energy and Buyer shall execute and deliver any other agreements, instruments and documents that are required by other terms of this Agreement to be executed or delivered at Closing.

In addition to the obligations set forth under Section 11.3 above, as soon as reasonably practicable following Closing but in any event within 30 days following the Closing Date, SM Energy shall make available to Buyer, during normal business hours at SM Energy’s offices, such copies of the Records to which Buyer is entitled pursuant to the terms of this Agreement.

This Agreement and the transactions contemplated herein may be terminated at any time at or prior to Closing:

(a) by SM Energy, if any of the conditions set forth in Section 9.2 (other than the conditions set forth in Section 9.2(d)) have not been satisfied by Buyer on or before December 30, 2016 (the “Outside Termination Date”);

(b) by Buyer, if any of the conditions set forth in Section 9.1 (other than the conditions set forth in Section 9.1(d)) have not been satisfied by SM Energy on or before the Outside Termination Date;

(c) by SM Energy if the condition set forth in Section 9.2(d) is not satisfied on or before the Outside Termination Date or by Buyer if the condition set forth in Section 9.1(d) has not been satisfied on or before the Outside Termination Date; or

provided, however, that no Party shall have the right to terminate this Agreement pursuant to clause (a) or (b) above if such Party or its Affiliates are at such time in material breach of any provision of this Agreement.

(a) If the obligation to close the transactions contemplated by this Agreement is terminated pursuant to any provision of Section 12.1, then, except as set forth in Section 12.2(b) and Section 12.2(c) and except for the provisions of (x) Section 2.3, Sections 5.1(c) through 5.1(g), Section 5.2, Section 5.3, this Section 12.2, Section 13.9, and Section 14.7, and (y) such terms as set forth in this Agreement in order to give context to any of the surviving Sections, this Agreement shall forthwith become void and the Parties shall have no liability or obligation hereunder, except and to the extent such termination results from the material breach by a Party of any of its covenants or agreements hereunder, in which case the non-breaching Party shall be entitled to the Deposit, damages, or specific performance as hereinafter provided.

(b) If this Agreement is terminated by SM Energy pursuant to Section 12.1(a), SM Energy has performed or is ready, willing and able to perform all of its agreements and covenants contained herein in all material respects which are to be performed or observed at Closing, and Buyer has failed to perform or observe any of its agreements or covenants contained herein which are to be performed or observed at Closing, then except for the remedies provided in Section 12.2(d), SM Energy shall receive and retain the Deposit as liquidated damages as SM Energy’s sole and exclusive remedy for any breach or failure to perform by Buyer under this Agreement, except for the indemnities provided in Section 5.1(c), and all other rights and remedies arising under this Agreement (except for the provisions that survive pursuant to Section 12.2(a), which shall remain in full force and effect) are hereby expressly waived by SM Energy. SM Energy and Buyer agree upon the Deposit as liquidated damages due to the difficulty and inconvenience of measuring actual damages and the uncertainty thereof, and SM Energy and Buyer agree that such amount would be a reasonable estimate of SM Energy’s loss in the event of any such breach or failure to perform by Buyer. In lieu of termination of this Agreement, subject to Section 13.9, SM Energy shall be entitled to specific performance of this Agreement as provided below.

(c) If this Agreement is terminated by Buyer pursuant to Section 12.1(b), Buyer has performed or is ready, willing and able to perform all of its agreements and covenants contained herein in all material respects which are to be performed or observed at Closing, and

SM Energy has failed to perform or observe any of its agreements or covenants contained herein which are to be performed or observed at Closing, SM Energy shall cause the Deposit to be returned to Buyer and Buyer shall be entitled to seek money damages from SM Energy available at Law for SM Energy’s applicable breach of this Agreement subject to Section 13.9, as Buyer’s sole and exclusive remedy for any breach or failure to perform by SM Energy under this Agreement (except for the remedies provided in Section 12.2(d)), and all other rights and remedies arising under this Agreement (except for the provisions that survive pursuant to Section 12.2(a), which shall remain in full force and effect) are hereby expressly waived by Buyer, and SM Energy shall be free immediately to enjoy all rights of ownership of the Assets and to sell, transfer, encumber or otherwise dispose of the Assets to any Person without any restriction under this Agreement. In lieu of termination of this Agreement, Buyer shall be entitled to specific performance of this Agreement as provided below.

(d) In lieu of termination of this Agreement, the Parties expressly agree that monetary damages will be insufficient to compensate them for their damages and as such each of Buyer and SM Energy agree that the Party with the right to terminate this Agreement shall in lieu thereof be entitled to exercise the remedy of specific performance under this Agreement. Prior to exercising the remedy of specific performance under this Agreement pursuant to this Section 12.2(d), the Party entitled thereto must deliver notice in writing to the other Party stating its election to exercise such remedy under this Section 12.2(d) within thirty (30) days counted from and after the Termination Date. If the Party entitled to exercise the remedy of specific performance elects to exercise such remedy pursuant to this Section 12.2(d), the Deposit shall continue to be held by the Escrow Agent, until a non-appealable final judgment or award on the claim of specific performance is rendered, or if specific performance is not granted, the Deposit shall be paid to the Party that was entitled to terminate this Agreement, or as otherwise provided in Section 2.3(b), as applicable. After such judgment is rendered, the Parties will issue a joint written instruction to the Escrow Agent to distribute the Deposit pursuant to such judgment. The Parties hereby agree not to raise, and hereby waive, any objections to the availability of the equitable remedy of specific performance to specifically enforce the terms and provisions of this Agreement or to enforce compliance with, the covenants and agreements of the Parties under this Agreement. The Party entitled to exercise specific performance as a remedy under this Agreement shall not be required to provide any bond or other security, or to prove irreparable injury or harm, in connection with seeking an injunction or injunctions to enforce specifically the terms and provisions of this Agreement. The Parties hereto further agree that (x) by seeking the specific performance provided for in this paragraph, including by the institution of a court proceeding, the Party entitled to seek such specific performance shall not in any respect waive its right to seek any other form of relief that may be available to it under this Agreement (including those related to termination of this Agreement) in the event that the specific performance provided for in this paragraph are not available or otherwise are not granted, and (y) nothing set forth in this paragraph shall require such Party to institute any proceeding for (or limit such Party’s right to institute a proceeding for) such remedies prior to or as a condition of exercising any termination right under this Section 12.2, nor shall the commencement of any proceeding pursuant to this paragraph restrict or limit such Party’s right to terminate this Agreement in accordance with this Section 12.2.

Upon termination of this Agreement, Buyer shall return to SM Energy all title, engineering, geological and geophysical data, environmental assessments or reports, maps and other information furnished by SM Energy to Buyer or, if not destroyed by Buyer, prepared by or on behalf of Buyer in connection with its due diligence investigation of the Assets, in each case, in accordance with the Confidentiality Agreement.

Without limiting Buyer’s rights to indemnity under this Article XIII and subject to any adjustments to the Purchase Price pursuant to Section 2.4, from and after the Closing, Buyer assumes and agrees to fulfill, perform, pay and discharge (or cause to be fulfilled, performed, paid or discharged) all obligations and Liabilities, known or unknown, with respect to the Assets, regardless of whether such obligations or Liabilities arose prior to, on or after the Effective Time, including, but not limited to, obligations and Liabilities relating in any manner to the use, ownership or operation of the Assets, such as obligations to: furnish makeup gas and/or settle Imbalances attributable to the Assets according to the terms of applicable gas sales, processing, gathering or transportation Contracts, pay working interests, royalties, overriding royalties and other interest owners’ revenues or proceeds attributable to sales of Hydrocarbons produced from the Assets, including those held in suspense, pay the proportionate share attributable to the Assets to properly plug and abandon any and all wells, including inactive wells or temporarily abandoned wells, located on the Assets, fulfill the Venting Obligations, pay the proportionate share attributable to the Assets to replug any well, wellbore or previously plugged well on the Assets to the extent required or necessary, pay the proportionate share attributable to the Assets to dismantle or decommission and remove any Personal Property and other property of whatever kind related to or associated with operations and activities conducted by whomever on the Assets, pay the proportionate share attributable to the Assets to clean up, restore and/or remediate the Assets in accordance with Applicable Contracts and Laws, and pay the proportionate share attributable to the Assets to perform all obligations applicable to or imposed on the lessee, owner or operator under the Leases and the Applicable Contracts, or as required by any Law, including the payment of all Taxes related to the Assets (all of said obligations and Liabilities, subject to the exclusions below, herein being referred to as the “Assumed Obligations”); provided, Buyer does not assume any obligations or Liabilities of SM Energy attributable to the Assets to the extent that such obligations or Liabilities consist of any of the following (the “Retained Obligations”):

(i) attributable to or arise out of the ownership, use or operation of the Excluded Assets;

(iv) any obligation or liability relating to any well control incident prior to the Effective Time at the Jaynes 16-12H Well.

Effective as of the Closing and thereafter, subject to the limitations set forth in Section 13.4 and otherwise contained in this Article XIII, SM Energy is responsible for, shall pay on a current basis and shall defend, indemnify and hold harmless Buyer and its Affiliates, and all of its and their respective stockholders, partners, members, directors, officers, managers, employees, agents and representatives, except for stockholders of any publicly traded entity (collectively, “Buyer Indemnified Parties”), and releases the Buyer Indemnified Parties from and against any and all Liabilities, arising from, based upon, related to or associated with:

(a) any breach by SM Energy of its representations or warranties contained in Article III;

(b) any breach by SM Energy of its covenants and agreements contained in this Agreement;

(c) the injury or death of any person, or property damage (other than property damage attributable to Environmental Conditions) to the extent arising out of or relating to the operation of the Assets by SM Energy prior to Closing;

(d) any contamination or condition that is the result of the SM Energy’s or its Affiliates’ off site transport, storage or disposal, or arrangement for transport, storage or disposal, of any hazardous substance from the Assets that occurred prior to Closing or are attributable to SM Energy’s or its Affiliates’ operations prior to Closing;

(e) any amounts due to third parties for failure to pay by SM Energy or the incorrect payment by SM Energy of any amount due to any royalty owner, overriding royalty owner, working interest owner or other interest holder under the Leases, Wells, Units or Lands and escheat obligations insofar as the same are attributable to periods and Hydrocarbons produced and marketed with respect to the Assets prior to the Closing Date, including matters related to the High Water Mark Claims or to other claims relating to the location of the ordinary high water mark;

(f) Suspended proceeds and the administration thereof to the extent such suspended proceeds (x) accrued and (y) were not accounted for pursuant to Section 2.4(c)(vii);

(g) any Proceedings set forth in Schedule 3.6 and/or any Proceeding filed by a third party against SM Energy in connection with any Asset, the operator of any Asset in connection with any such Asset or against any Asset, that is filed on or prior to the Execution Date, except in all cases the High Water Mark Suit, or as related to the High Water Mark Claims; and

Effective as of the Closing and thereafter, except for Liabilities for which SM Energy is required to indemnify Buyer Indemnified Parties under Section 13.2, Buyer and its successors and assigns shall assume, be responsible for, shall pay on a current basis and shall defend, indemnify, hold harmless and forever release SM Energy and its Affiliates, and all of their respective stockholders, partners, members, directors, officers, managers, employees, agents and representatives, except for stockholders of any publicly traded entity (collectively, “SM Indemnified Parties”), and releases the SM Indemnified Parties from and against any and all Liabilities arising from, based upon, related to or associated with:

(a) any breach by Buyer of its representations or warranties contained in Article IV;

(b) any breach by Buyer of its covenants and agreements contained in this Agreement;

(a) SM Energy shall not have any liability for any indemnification under Section 13.2(a), unless (i) the individual amount of any Liability for which a Claim Notice is delivered by Buyer to SM Energy under this Article XIII and for which SM Energy is liable exceeds $100,000 and (ii) the aggregate amount of such Liabilities for which SM Energy is liable under this Agreement after the application of the provisions of clause (i) above exceeds 1.75% of the aggregate unadjusted Purchase Price; provided, however, that the foregoing limitation shall not apply to any knowing and intentional fraud of SM Energy, or the Subject Special Warranty and/or breach of the Fundamental Representations.

(b) For purposes of this Article XIII, any breach or inaccuracy in any representations or warranties shall be determined without regard to any dollar or Material Adverse Effect, materiality or similar qualifiers.

(c) Notwithstanding anything to the contrary contained in this Agreement, SM Energy shall not be required to indemnify the Buyer Indemnified Parties for aggregate Liabilities under Section 13.2(a), 13.2(c), 13.2(d), 13.2(e), 13.2(f) and/or 13.2(g) in excess of the sum of 20% of the aggregate unadjusted Purchase Price (the “Cap”), provided that the amount of any Liability for which an indemnity claim is made by Buyer which SM Energy actually recovers from any third party insurer shall not be counted against the Cap, and provided further, that the Cap shall not apply to any knowing and intentional fraud of SM Energy, the Subject Special Warranty and/or breach of the Fundamental Representations. SM Energy shall use reasonable commercial efforts to recover from any third party insurers the amount of any Liabilities for which an indemnity claim is made by Buyer.

EXCEPT AS OTHERWISE PROVIDED IN SECTION 5.1(c), THE INDEMNIFICATION, RELEASE, ASSUMED OBLIGATIONS, WAIVER AND LIMITATION OF LIABILITY PROVISIONS PROVIDED FOR IN THIS AGREEMENT SHALL BE APPLICABLE WHETHER OR NOT THE LIABILITIES, LOSSES, COSTS, EXPENSES AND DAMAGES IN QUESTION AROSE OR RESULTED SOLELY OR IN PART FROM THE GROSS, SOLE, ACTIVE, PASSIVE, CONCURRENT OR COMPARATIVE NEGLIGENCE, STRICT LIABILITY OR OTHER FAULT OR VIOLATION OF LAW OF OR BY ANY INDEMNIFIED PERSON, EXCEPT FOR KNOWING AND INTENTIONAL FRAUD AND/OR WILLFUL MISCONDUCT. BUYER AND SM ENERGY ACKNOWLEDGE THAT THIS STATEMENT COMPLIES WITH THE EXPRESS NEGLIGENCE RULE AND IS “CONSPICUOUS”.

Notwithstanding anything to the contrary contained in this Agreement, from and after the Closing, Section 5.1(c), Section 13.2, Section 13.3 and the Subject Special Warranty contain the Parties’ exclusive remedy against each other with respect to breaches of the representations, warranties, covenants and agreements of the Parties contained in this Agreement and the affirmations of such representations, warranties, covenants and agreements contained in the certificate delivered by each Party at Closing pursuant to Section 11.3(g) or Section 11.3(h), as applicable. Except for (a) the remedies contained in this Article XIII, (b) Subject Special Warranty, (c) knowing and intentional fraud of SM Energy, and (d) other remedies available to the Parties at Law or in equity for breaches of Section 5.1(c) and Section 5.2, from and after the Closing, SM Energy and Buyer each release, remise and forever discharge the other Party and its Affiliates and all such Persons’ stockholders, officers, directors, employees, agents, advisors and representatives from any and all Liabilities in Law or in equity, known or unknown, which such Parties might now or subsequently may have, based on, relating to or arising out of (i) this Agreement or the consummation of the transactions contemplated by this Agreement, (ii) the ownership, use or operation of the Assets prior to the Closing, or the condition, quality, status or nature of the Assets prior to the Closing, including rights to contribution under the Comprehensive Environmental Response, Compensation, and Liability Act of 1980, as amended, (iii) breaches of statutory or implied warranties with respect to this Agreement, (iv) nuisance or other tort actions with respect to this Agreement, (v) rights to punitive damages with respect to this Agreement, (vi) common Law rights of contribution with respect to this Agreement, and (vii) rights under insurance maintained by SM Energy or any of its Affiliates with respect to this Agreement.

All claims for indemnification under Section 5.1(c), Section 13.2 and Section 13.3 shall be asserted and resolved as follows:

(a) For purposes of this Article XIII, the term “Indemnifying Party”, when used in connection with particular Liabilities, shall mean the Party having an obligation to indemnify another Party or Person(s) with respect to such Liabilities pursuant to this Article XIII, and the term “Indemnified Party”, when used in connection with particular Liabilities, shall mean the Party or Person(s) having the right to be indemnified with respect to such Liabilities by another Party pursuant to this Article XIII.

(b) To make claim for indemnification under Section 5.1(c), Section 13.2 or Section 13.3, an Indemnified Party shall notify the Indemnifying Party of its claim under this Section 13.7, including the specific details of and specific basis under this Agreement for its claim (the “Claim Notice”). In the event that the claim for indemnification is based upon a claim by a third party against the Indemnified Party (a “Third Party Claim”), the Indemnified Party shall provide its Claim Notice promptly after the Indemnified Party has actual knowledge of the Third Party Claim and shall enclose a copy of all papers (if any) served with respect to the Third Party Claim; provided that the failure of any Indemnified Party to give notice of a Third Party Claim as provided in this Section 13.7 shall not relieve the Indemnifying Party of its obligations under Section 5.1(c), Section 13.2 or Section 13.3 (as applicable) except to the extent such failure results in insufficient time being available to permit the Indemnifying Party to effectively defend against the Third Party Claim or otherwise materially prejudices the Indemnifying Party’s ability to defend against the claim. In the event that the claim for indemnification is based upon an inaccuracy or breach of a representation, warranty, covenant or agreement, the Claim Notice shall specify the representation, warranty, covenant or agreement that was inaccurate or breached.

(c) In the case of a claim for indemnification based upon a Third Party Claim, the Indemnifying Party shall have fifteen (15) days from its receipt of the Claim Notice to notify the Indemnified Party whether it admits or denies its liability to defend the Indemnified Party against such Third Party Claim at the sole cost and expense of the Indemnifying Party. The Indemnified Party is authorized, prior to and during such fifteen (15) day period, at the expense of the Indemnifying Party, to file any motion, answer or other pleading that it shall deem necessary or appropriate to protect its interests or those of the Indemnifying Party and that is not prejudicial to the Indemnifying Party.

(d) If the Indemnifying Party admits its obligation to indemnify a Third Party Claim, it shall have the right and obligation to diligently defend, at its sole cost and expense, the Third Party Claim provided that, where the Third Party Claim consists of (i) a civil, criminal or regulatory proceeding, action, indictment or investigation against the Indemnified Party by any Governmental Authority, (ii) a claim in which the Indemnifying Party is also a party and the Indemnified Party determines in good faith that joint representation would be inappropriate, or (iii) a claim that primarily seeks injunctive or other non-monetary or equitable relief against the Indemnified Party, the Indemnified Party shall at its option have the right to control the defense and proceedings. Except as provided in the preceding sentence, the Indemnifying Party shall have full control of such defense and proceedings, including any compromise or settlement thereof. If requested by the Indemnifying Party, the Indemnified Party agrees to cooperate in contesting any Third Party Claim that the Indemnifying Party elects to contest (provided, however, that the Indemnified Party shall not be required to bring any counterclaim or cross-complaint against any Person). The Indemnified Party may participate in, but not control, at its own expense, any defense or settlement of any Third Party Claim controlled by the Indemnifying Party pursuant to this Section 13.7(d). An Indemnifying Party shall not, without the prior written consent of the Indemnified Party, settle any Third Party Claim or consent to the entry of any judgment with respect thereto that (i) does not result in a final resolution of the Indemnified

Party’s Liability in respect of such Third Party Claim (including in the case of a settlement an unconditional written release of the Indemnified Party from all Liability in respect of such Third Party Claim), (ii) results in a finding or admission of any violation of Law or the violation of the rights of any Person or subjects the Indemnified Party to other Third Party Claims or (iii) in any manner may materially and adversely affect the Indemnified Party (other than as a result of money damages covered by the indemnification obligations hereunder).

(e) If the Indemnifying Party does not admit its obligation to indemnify and bear all expenses associated with a Third Party Claim or admits its obligation to indemnify and bear all expenses associated with a Third Party Claim but fails to diligently prosecute or settle the Third Party Claim, then the Indemnified Party shall have the right to defend against the Third Party Claim at the sole cost and expense of the Indemnifying Party, with counsel of the Indemnified Party’s choosing, subject to the right of the Indemnifying Party to admit its obligation to indemnify and bear all expenses associated with a Third Party Claim and assume the defense of the Third Party Claim at any time prior to settlement or final determination thereof. If the Indemnifying Party has not yet admitted its obligation to indemnify and bear all expenses associated with a Third Party Claim, the Indemnified Party shall send written notice to the Indemnifying Party of any proposed settlement and the Indemnifying Party shall have the option for 10 Business Days following receipt of such notice to (i) admit in writing its obligation to indemnify and bear all expenses associated with a Third Party Claim and (ii) if such obligation is so admitted, reject, in its reasonable judgment, the proposed settlement. Any failure to respond to such notice by the Indemnifying Party shall be deemed to be an election under (ii) of the preceding sentence.

(f) In the case of a claim for indemnification not based upon a Third Party Claim, the Indemnifying Party shall have 30 days from its receipt of the Claim Notice to (i) cure the Liabilities complained of, (ii) admit its obligation to indemnify for and bear all expenses associated with such Liability or (iii) dispute the claim for such Liabilities. If the Indemnifying Party does not notify the Indemnified Party within such 30 day period that it has cured the Liabilities or that it disputes the claim for such Liabilities, the amount of such Liabilities shall conclusively be deemed a liability of the Indemnifying Party hereunder.

(a) The representations and warranties of SM Energy contained in this Agreement shall survive the Closing until the date that is the first anniversary date of the Closing Date and expire thereafter; provided however, that the Fundamental Representations shall survive until sixty (60) days following the expiration of the applicable statute of limitations period. The covenants and agreements of SM Energy and of Buyer contained in this Agreement to be performed prior to the Closing Date shall, in each case, survive the Closing until the date that is the first anniversary date of the Closing Date and expire thereafter, and all other covenants and agreements of SM Energy and Buyer contained in this Agreement shall survive the Closing until fully performed, subject however to applicable statutes of limitation. The representations and warranties of Buyer contained in Article IV shall survive the Closing without time limit, subject to applicable statutes of limitations. Representations, warranties, covenants and agreements shall be of no further force and effect after the date of their expiration; provided that there shall be no termination of any bona fide claim asserted pursuant to this Agreement with respect to such a representation, warranty, covenant or agreement prior to its expiration date.

(b) The indemnities in Section 13.2(a), Section 13.2(b), Section 13.3(a) and Section 13.3(b) shall terminate as of the termination date of each respective representation, warranty, covenant or agreement that is subject to indemnification as set forth in Section 13.8(a). The indemnities contained in Section 13.2(h) shall survive the Closing without time limit, subject to applicable statutes of limitation, and Buyer’s indemnities contained in Section 13.3(c) and/or Section 13.3(d) shall survive the Closing without time limit, subject to applicable statutes of limitation. The indemnities in Section 13.2(c), Section 13.2(e), Section 13.2(f) and Section 13.2(g) shall terminate after the expiration of five hundred and forty eight (548) days after the Closing Date. The indemnities in Section 13.2(d) shall survive the Closing indefinitely, subject to expiration under applicable statues of limitations. Notwithstanding the foregoing, there shall be no termination of any bona fide claim asserted pursuant to the indemnities in Section 13.2 or Section 13.3 prior to the date of termination for such indemnity.

None of the Buyer Indemnified Parties or SM Indemnified Parties shall be entitled to recover from SM Energy or Buyer, as applicable, or their respective Affiliates, any indirect, consequential (including consequential damages for lost profits), punitive or exemplary damages of any kind arising under or in connection with this Agreement or the transactions contemplated by this Agreement, except to the extent any such Party suffers such damages (including costs of defense and reasonable attorney’s fees incurred in connection with defending of such damages) to a third party, which damages (including costs of defense and reasonable attorney’s fees incurred in connection with defending against such damages) shall not be excluded by this provision as to recovery hereunder. Subject to the preceding sentence, Buyer, on behalf of each of the Buyer Indemnified Parties, and SM Energy, on behalf of each of SM Indemnified Parties, each waive any right to recover punitive, special, exemplary and consequential damages, including consequential damages for lost profits of any kind, arising in connection with this Agreement or the transactions contemplated by this Agreement. This Section 13.9 shall not restrict Buyer’s right to obtain specific performance or other equitable remedies (other than rescission) pursuant to Section 12.2.

This Agreement may be executed in any number of counterparts, and each such counterpart hereof shall be deemed to be an original instrument, but all of such counterparts shall constitute for all purposes one agreement. Any signature hereto delivered by a Party by facsimile transmission shall be deemed an original signature hereto.

All notices and communications required or permitted to be given hereunder shall be sufficient in all respects if given in writing and delivered personally, or sent by bonded overnight courier, or

mailed by U.S. Express Mail or by certified or registered United States Mail with all postage fully prepaid, or sent by telex or facsimile transmission (provided any such telex or facsimile transmission is confirmed either orally or by written confirmation), addressed to the appropriate Party at the address for such Party shown below or at such other address as such Party shall have theretofore designated by written notice delivered to the Party giving such notice:

Any notice given in accordance herewith shall be deemed to have been given when delivered to the addressee in person or by courier, transmitted by facsimile transmission during normal business hours, or upon actual receipt by the addressee after such notice has either been delivered to an overnight courier or deposited in the United States Mail, as the case may be. The Parties may change the address and facsimile numbers to which such communications are to be addressed by giving written notice to the other Parties in the manner provided in this Section 14.2.

Except as otherwise specifically provided, all fees, costs and expenses incurred by the Parties in negotiating this Agreement shall be paid by the Party incurring the same, including legal and accounting fees, costs and expenses.

Any of the terms, covenants or conditions hereof may be waived only by a written instrument executed by or on behalf of the Party waiving compliance. No course of dealing on the part of any Party or its respective officers, employees, agents or representatives, and no failure by a Party to exercise any of its rights under this Agreement shall, in either case, operate as a waiver thereof or affect in any way the right of such Party at a later time to enforce the performance of such provision. No waiver by any Party of any condition, or any breach of any term or covenant contained in this Agreement, in any one or more instances, shall be deemed to be or construed as a further or continuing waiver of any such condition or breach or a waiver of any other condition or of any breach of any other term or covenant. The rights of the Parties under this Agreement shall be cumulative, and the exercise or partial exercise of any such right shall not preclude the exercise of any other right.

The rights, duties, obligations and liabilities of the Parties under this Agreement shall be individual, not joint or collective. It is not the intention of the Parties to create, and this Agreement shall not be deemed or construed to create, a mining or other partnership, joint venture or association or a trust. This Agreement shall not be deemed or construed to authorize any Party to act as an agent, servant or employee for any other Party for any purpose whatsoever except as explicitly set forth in this Agreement. In their relations with each other under this Agreement, the Parties shall not be considered fiduciaries.

THIS AGREEMENT, THE EXHIBITS, SCHEDULES AND APPENDICES HERETO COLLECTIVELY CONSTITUTE THE ENTIRE AGREEMENT AMONG THE PARTIES PERTAINING TO THE SUBJECT MATTER HEREOF AND SUPERSEDE ALL PRIOR AGREEMENTS, UNDERSTANDINGS, NEGOTIATIONS AND DISCUSSIONS, WHETHER ORAL OR WRITTEN, OF THE PARTIES PERTAINING TO THE SUBJECT MATTER OF THIS AGREEMENT. THERE ARE NO WARRANTIES, REPRESENTATIONS OR OTHER AGREEMENTS AMONG THE PARTIES RELATING TO THE SUBJECT MATTER OF THIS AGREEMENT EXCEPT AS SPECIFICALLY SET FORTH IN THIS AGREEMENT, AND NO PARTY SHALL BE BOUND BY OR LIABLE FOR ANY ALLEGED REPRESENTATION, PROMISE, INDUCEMENT OR STATEMENTS OF INTENTION NOT SO SET FORTH. IN THE EVENT OF A CONFLICT BETWEEN THE TERMS AND PROVISIONS OF THIS AGREEMENT AND THE TERMS AND PROVISIONS OF ANY EXHIBIT HERETO; THE TERMS AND PROVISIONS OF THIS AGREEMENT SHALL GOVERN AND CONTROL; PROVIDED, HOWEVER, THAT THE INCLUSION IN ANY OF THE EXHIBITS HERETO OF TERMS AND PROVISIONS NOT ADDRESSED IN THIS AGREEMENT SHALL NOT BE DEEMED A CONFLICT, AND ALL SUCH ADDITIONAL PROVISIONS SHALL BE GIVEN FULL FORCE AND EFFECT.

THIS AGREEMENT AND THE LEGAL RELATIONS AMONG THE PARTIES SHALL BE GOVERNED AND CONSTRUED IN ACCORDANCE WITH THE LAWS OF THE STATE OF TEXAS, EXCLUDING ANY CONFLICTS OF LAW RULE OR PRINCIPLE THAT MIGHT REFER CONSTRUCTION OF SUCH PROVISIONS TO THE LAWS OF ANOTHER JURISDICTION. ALL OF THE PARTIES CONSENT TO THE EXERCISE OF JURISDICTION IN PERSONAM BY THE FEDERAL AND STATE COURTS IN THE STATE OF TEXAS LOCATED IN HARRIS COUNTY FOR ANY DISPUTE. EACH PARTY WAIVES, TO THE FULLEST EXTENT PERMITTED BY APPLICABLE LAW, ANY RIGHT IT MAY HAVE TO A TRIAL BY JURY IN RESPECT OF ANY DISPUTE.

Promptly after the Closing, Buyer shall (a) record the Assignments and all state/federal assignments executed at Closing in all applicable real property records and/or, if applicable, all state or federal agencies. Buyer obligates itself to post any and all customary bonds or other security that may be required in excess of any existing bond required by a Governmental Authority in connection with the transfer of the Assets to Buyer.

This Agreement may be amended only by an instrument in writing executed by the Parties and expressly identified as an amendment or modification hereof.

Nothing in this Agreement shall entitle any Person other than the Parties to any claim, cause of action, remedy or right of any kind, other than with respect to the rights of the Affiliates and representatives of SM Energy and Buyer described in Section 13.2 and Section 13.3, respectively.

This Agreement shall be binding upon and inure to the benefit of the Parties and their respective successors and permitted assigns, provided, however, except as set forth in Section 2.7, neither Party shall have the right to assign its rights and/or obligations under the Agreement without the prior written consent of the other Party, and any such assignment or transfer, whether effected directly or indirectly, shall be void. Nothing herein shall prevent Buyer after the Closing from assigning any of its right, title and interest in the Assets.

(a) Without reasonable prior notice to the other Parties, no Party will issue, or permit any of its agents or Affiliates to issue, any press releases or otherwise make, or cause any

of its agents or Affiliates to make, any public statements with respect to this Agreement or the activities contemplated hereby, except where such release or statement is deemed in good faith by the releasing Party to be required by Law or under the rules and regulations of a recognized stock exchange on which shares of such Party or any of its Affiliates are listed.

(b) Notwithstanding anything to the contrary in Section 14.12(a), any Party or Affiliate of a Party may disclose information regarding the Assets in investor presentations, industry conference presentations or similar disclosures to the extent that such information has previously been publicly released.

Both SM Energy and Buyer and their respective counsel participated in the preparation of this Agreement. In the event of any ambiguity in this Agreement, no presumption shall arise based on the identity of the draftsman of this Agreement.

If any term or other provision of this Agreement is invalid, illegal or incapable of being enforced by any rule of Law or public policy, all other conditions and provisions of this Agreement shall nevertheless remain in full force and effect so long as the economic or legal substance of the transactions contemplated hereby is not affected in any adverse manner to any Party. Upon such determination that any term or other provision is invalid, illegal or incapable of being enforced, the Parties shall negotiate in good faith to modify this Agreement so as to effect the original intent of the Parties as closely as possible in an acceptable manner to the end that the transactions contemplated hereby are fulfilled to the extent possible.

The captions and headings in this Agreement are for convenience of reference only and will not control or affect the meaning or construction of any provisions of this Agreement.

IN WITNESS WHEREOF, the Parties have executed this Agreement by their duly authorized representatives on and as of the Execution Date.


SM ENERGY COMPANY

By:		/s/ Javan D. Ottoson
Name:		Javan D. Ottoson
Title:		President and Chief Executive Officer

OASIS PETROLEUM NORTH AMERICA LLC

By:		/s/ Taylor L. Reid
Name:		Taylor L. Reid
Title:		President and Chief Operating Officer

“Accounting Arbitrator” has the meaning set forth in Section 2.6(c).

“Affiliate” means, with respect to any Party, a Person that directly or indirectly, through one or more intermediaries, Controls, is Controlled by or is under common Control with, such Party.

“Aggregate Environmental Deductible” means 2.0% of the unadjusted Purchase Price.

“Aggregate Title Deductible” means 1.0% of the unadjusted Purchase Price.

“Agreement” has the meaning set forth in the preamble to this Agreement.

“Applicable Contracts” means all Contracts that will be binding on the Assets or Buyer after the Closing or to which SM Energy is a party that primarily relate to the Assets and that will be binding on the Assets or Buyer after the Closing, including, without limitation; farmin and farmout agreements; participation agreements; drag along agreements; bottomhole agreements; crude oil, condensate and natural gas purchase and sale agreements; gathering, transportation and marketing agreements; hydrocarbon storage agreements; joint venture agreements; surface use agreements; acreage contribution agreements; operating agreements (including, for the avoidance of doubt, Applicable Operating Agreements); balancing agreements; pooling declarations or agreements; unitization agreements; processing agreements; water rights agreement, disposal agreements, or similar agreement relating to sourcing, transportation, or disposal of water; crossing agreements, surface use agreements and other similar contracts and agreements, but excluding the Leases and any master service agreements.

“Applicable Operating Agreements” means, collectively, the joint operating agreements applicable to the Assets, and “Applicable Operating Agreement” means any of them.

“Asset Taxes” means ad valorem, property, excise, severance, production or similar taxes (including any interest, fine, penalty or additions to tax imposed by Governmental Authorities in connection with such taxes) based upon operation or ownership of the Assets or the production of Hydrocarbons therefrom, but excluding, for the avoidance of doubt, income, capital gains and franchise taxes.

“Assets” means SM Energy’s right, title and interest in and to the following: (a) all oil and gas leases and mineral interests described in Exhibit A and any leasehold estates, royalty interests, overriding royalty interests, net profits interests and other rights and interests to the oil and gas in place covered by such leases (the “Leases”) together with each and every kind and character of right, title, claim, and interest that SM Energy has in and to the Leases, the lands covered by the Leases and the lands pooled acreage, communitized acreage or included units

arising on account of Leases being pooled, communitized or unitized (“Units”, and the lands covered by the Leases or pooled, unitized, communitized or consolidated therewith being hereinafter referred to as the “Lands”); (b) the oil, gas, casinghead gas, coal bed methane, condensate and other gaseous and liquid hydrocarbons or any combination thereof, sulphur extracted from hydrocarbons and all other lease substances (“Hydrocarbons”) under the Leases, Units or Lands and that may be produced and saved under or otherwise be allocated or attributed to the Leases, Units or Lands (including Hydrocarbons produced from or attributable to the Assets in storage or existing in stock tanks, pipelines and/or plants (including inventory) as of the Effective Time),; (c) the oil, gas, water or injection wells located on Leases, Units or Lands, whether producing, shut-in or temporarily abandoned, including those described in Exhibit B (whether or not such Wells described in Exhibit B are located on the Lands or Units), (the “Wells”) and including all of the personal property, equipment, fixtures and improvements used in connection therewith; (d) the unitization, pooling and communitization agreements, declarations, orders and the units created thereby relating to the properties and interests described in clauses (a) through (c) or to the production, gathering, treatment, processing, storage, sale, disposal and other handling of Hydrocarbons, if any, attributable to said properties and interests; (e) all equipment, machinery, fixtures and other tangible personal property and improvements located on or used or held for use in connection with the operation of the interests described in clauses (a) through (d) or the production, gathering, treatment, processing, storage, sale, disposal, and other handling of Hydrocarbons attributable thereto, including any wells, well equipment, tanks, boilers, buildings, fixtures, injection facilities, saltwater disposal facilities, compressors and compression facilities, pumping units and engines, platforms, flow lines, pipelines, gathering systems, gas and oil treating facilities, machinery, power lines, telephone and telegraph lines, SCADA and other measurement equipment, roads, and other appurtenances, improvements and facilities (all of the foregoing, collectively, the “Equipment”); (f) all surface fee interests, leases, permits, rights-of-way, licenses, easements licenses, servitudes, and other surface rights and governmental authorizations and other surface rights agreements solely to the extent used or held for use in connection with the production, gathering, treatment, processing, storage, sale, disposal and other handling of Hydrocarbons, produced water, or water for injection from the interests described in clauses (a) through (e) (collectively, the “Surface Contracts”); (g) all existing contracts and effective sales, purchase contracts, operating agreements, exploration agreements, joint venture agreements, development agreements, balancing agreements, farmout agreements, service agreements, transportation, processing, treatment or gathering agreements, equipment leases and other contracts, agreements and instruments, insofar as they directly relate to the properties and interests described in clauses (a) through (f) (collectively, the “Contracts”); (h) all claims, refunds, and other rights to the extent such items arise from or by their terms relate to the Assumed Obligations or are items otherwise allocated to Buyer under the other provisions of this Agreement, (i) to the extent transferable without payment of additional consideration, originals, to the extent available, or copies of all the files, records and data relating to the items described in clauses (a) through (h) above and (i) below, which records shall include, without limitation: lease records, well records, division order records, well files, title records (including abstracts of title, title opinions and memoranda, and title curative documents), engineering records, geological and all technical evaluations, interpretative data and technical data and information relating to the Assets, correspondence, electronic data files (if any), maps, production records, electric logs, core data, pressure data, decline curves and graphical production curves, reserve reports, appraisals and accounting and Asset Tax records

(collectively, the “Records”); and (i) the salt water disposal systems depicted on the map attached as Exhibit H or located on the lands described on Exhibit H, and all pipelines, equipment and contracts related thereto.

“Assignment” means the Assignment and Bill of Sale from SM Energy to Buyer, pertaining to the Assets, substantially in the form attached hereto as Exhibit C.

“Burdens” means, with respect to any Asset, all royalties, overriding royalties, production payments, carried interests, net profits interests, reversionary interests and other burdens upon, measured by or payable out of, production therefrom.

“Business Day” means a day (other than a Saturday or Sunday) on which commercial banks in Texas are generally open for business.

“Buyer Indemnified Parties” has the meaning set forth in Section 13.2.

“Buyer’s Representatives” has the meaning set forth in Section 5.1(a).

“Closing Amount” means the Preliminary Purchase Price less the Deposit.

“Confidentiality Agreement” means that certain Confidentiality Agreement between SM Energy and Buyer, dated as of October 10, 2016.

“Contract” has the meaning set forth in the definition of “Assets” above.

“Control” and its derivatives mean, with respect to any Person, the possession, directly or indirectly, of the power to exercise or determine the voting of more than 50% of the voting rights in a corporation, and, in the case of any other type of entity, the right to exercise or determine the voting of more than 50% of the equity interests having voting rights, or otherwise to direct or cause the direction of the management and policies of such Person, whether by contract or otherwise.

“Customary Post-Closing Consents” means those consents and approvals from Governmental Authorities for the assignment of the Assets to the Buyer that are customarily obtained after the assignment of properties similar to the Assets.

“Defensible Title” means such title of SM Energy with respect to the Assets that is deducible of record, or by any other legally enforceable right superior to claims of other persons, and that subject to Permitted Encumbrances:

(a) with respect to each Well or Well Location shown in Exhibit B (but limited to the applicable Target Interval set forth in Exhibit B for such Well or Well Location and any other currently producing formation (for such Well)), entitles SM Energy to receive not less than the Net Revenue Interest shown in Exhibit B, for such Well or Well Location throughout the duration of the productive life of such Well or Well Location, except for (i) decreases in connection with those operations in which SM Energy may, from and after the Execution Date, be a non-consenting co-owner (to the extent permitted pursuant to Section 8.1), (ii) decreases resulting from the establishment or amendment from and after the Execution Date of pools or units, (iii) decreases required to allow other Working Interest owners to make up past underproduction or pipelines to make up past under deliveries to the extent such underproduction is set forth in Schedule 3.10, and (iv) as otherwise expressly stated in Exhibit B;

(b) with respect to each Well or Well Location shown in Exhibit B (but limited to the applicable Target Interval set forth in Exhibit B for such Well or Well Location and any other currently producing formation (for such Well)), obligates SM Energy to bear the Working Interest for such Well or Well Location not greater than the Working Interest shown in Exhibit B, for such Well or Well Location without increase throughout the productive life of such Well or Well Location, except (i) increases resulting from contribution requirements with respect to defaults after the Effective Time by co-owners from and after the Execution Date under Applicable Operating Agreements, (ii) increases to the extent that they are accompanied by a proportionate increase in the Net Revenue Interest in the Assets, and (iii) as otherwise expressly stated in Exhibit B; and

“Dispute” means any dispute, controversy or claim (of any and every kind or type, whether based on contract, tort, statute, regulation or otherwise) arising out of, relating to or connected with this Agreement or the transactions contemplated hereby, including but not limited to any dispute, controversy or claim concerning the existence, validity, interpretation, performance, breach or termination of this Agreement, the relationship of the Parties arising out of this Agreement or the transactions contemplated hereby.

“Effective Time” means 7:00 a.m. local time at the location of the Assets on October 1, 2016.

“Encumbrance” means a mortgage, lien, security interest, pledge, charge or other encumbrance, and “Encumber” and other similar derivatives shall be construed accordingly.

“Environmental Arbitrator” has the meaning set forth in Section 7.1(e).

“Environmental Condition” means (a) a condition existing on the Defect Claim Date with respect to the air, soil, subsurface, surface waters, ground waters and/or sediments that causes any Asset (or SM Energy with respect to any Asset) not to be in compliance with any Environmental Law or (b) the existence as of the Execution Date with respect to any Asset or the operation thereof of any environmental pollution, contamination, degradation, damage or injury caused by, related to such Asset for which remedial or corrective action is presently required (or if known, would be presently required) under Environmental Laws.

“Environmental Defect” means an Environmental Condition with respect to an Asset, provided, however, (a) the matters set forth in Schedule 3.12 and (b) matters related to the Venting Obligations, shall in each case, not constitute an Environmental Defect.

“Environmental Defect Notice” has the meaning set forth in Section 7.1(a).

“Environmental Defect Property” has the meaning set forth in Section 7.1(a).

“Environmental Laws” means all applicable federal, state and local Laws in effect as of the Effective Time or Execution Date, including common Law, relating to the protection of the public health, welfare and the environment, including, without limitation, those Laws relating to the generation, storage, handling, use, processing, treatment, transportation, disposal or other management of chemicals and other Hazardous Substances. The term “Environmental Laws” does not include good or desirable operating practices or standards that may be employed or adopted by other oil and gas well operators or recommended by OSHA.

“Equipment” has the meaning set forth in the definition of “Assets” above.

“Escrow Agreement” means that certain escrow agreement, among Buyer, SM Energy and the Escrow Agent.

“Excluded Assets” means (a) all of SM Energy’s corporate minute books, financial records and other business records that relate to SM Energy’s business generally (including the ownership and operation of the Assets); (b) all trade credits, all accounts, receivables and all other proceeds, income or revenues attributable to the Assets with respect to any period of time prior to the Effective Time; (c) subject to Section 6.3, all rights and interests relating to the Assets (i) under any existing policy or agreement of insurance, (ii) under any bond or (iii) to any insurance or condemnation proceeds or awards arising, in each case, from acts, omissions or events, or damage to or destruction of property occurring prior to the Effective Time; (d) all Hydrocarbons produced and sold from the Assets with respect to all periods prior to the Effective

Time, except for Hydrocarbons produced from or attributable to the Assets in storage or existing in stock tanks, pipelines and/or plants (including inventory) as of the Effective Time; (e) all claims of SM Energy or its Affiliates for refunds of or loss carry forwards with respect to (i) production or any other Taxes paid by SM Energy or its Affiliates attributable to any period prior to the Effective Time, except, in each case, to the extent such items arise from or by their terms relate to the Assumed Obligations or are items otherwise allocated to Buyer under the other provisions of this Agreement, (ii) income Taxes paid by SM Energy or its Affiliates or (iii) any Taxes attributable to the other Excluded Assets; (f) all personal computers and associated peripherals and all radio and telephone equipment, except as set forth in the definition of Assets; (g) all of SM Energy’s proprietary computer software, patents, trade secrets, copyrights, names, trademarks, logos and other intellectual property; (h) all documents and instruments of SM Energy that may be protected by an attorney-client privilege, other than title opinions; (i) all data that cannot be disclosed to Buyer as a result of confidentiality arrangements under agreements with third parties, provided that the existence of such agreements has been disclosed to Buyer in writing; (j) all audit rights arising under any of the (i) Applicable Contracts or otherwise with respect to any period prior to the Effective Time or (ii) other Excluded Assets, except for any Imbalances and except, in each case, to the extent such items arise from or by their terms relate to the Assumed Obligations or are items otherwise allocated to Purchaser under the other provisions of this Agreement; (k) all non-proprietary geophysical data and other seismic data relating to the assets; (l) documents prepared or received by SM Energy or its Affiliates with respect to (i) lists of prospective purchasers for the Assets, (ii) bids submitted by other prospective purchasers of the Assets, (iii) analyses by SM Energy or its Affiliates of any bids submitted by any prospective purchaser, (iv) correspondence between or among SM Energy, its representatives and any prospective purchaser other than Buyer, and (v) correspondence between SM Energy or any of its representatives with respect to any of the bids, the prospective purchasers or the transactions contemplated by this Agreement; (m) a copy of all Records; (n) except as specifically described in the definition of Assets, any offices, office leases and any office furniture or office supplies located in or on such offices or office leases; (o) any Applicable Contracts and Records that are related to Assets that are excluded pursuant to the provisions of Section 6.4(c)(ii), Section 6.4(d)(i) or Section 7.1(b)(ii); (p) any Contracts that constitute master services agreements or similar contracts; and (q) the assets described in Exhibit F.

“Execution Date” has the meaning set forth in the preamble to this Agreement.

“Final Settlement Statement” has the meaning set forth in Section 2.6(b).

“Franchise Tax Liability” means any Tax imposed by a state on SM Energy’s or any of its Affiliates’ gross or net income and/or capital for the privilege of engaging in business in that state that was or is attributable to SM Energy’s or any of its Affiliates’ ownership of an interest in the Assets.

“GAAP” means the generally accepted accounting principles in the United States of America.

“Governmental Authority” means any federal, state, local, municipal, tribal or other government; any governmental, regulatory or administrative agency, commission, body or other

authority exercising or entitled to exercise any administrative, executive, judicial, legislative, regulatory or taxing authority or power; and any court or governmental tribunal, including any tribal authority having or asserting jurisdiction.

“Hazardous Substances” means any pollutants, contaminants, toxics or hazardous or extremely hazardous substances, materials, wastes, constituents, compounds or chemicals that are regulated by, or may form the basis of any liability under, any Environmental Laws, including NORM and other substances referenced in Section 7.2.

“High Water Mark Claims” means all claims arising out of or relating to the delineation of the Ordinary High Water Mark (OHWM) within the bounds of Lake Sakakawea, a man made reservoir which began filling in the 1950’s, where the State of North Dakota is claiming rights to minerals up to the artificial OHWM creating by the filling of the reservoir rather than the OHWM of the natural Missouri River, including but not limited to, all claims arising out of or related to the High Water Mark Suit.

“High Water Mark Suit” means EEE Minerals, LLC et al. v. SM Energy Company et al. where SM Energy was named as one of approximately 100 defendants, including the State of North Dakota, in a Class Action Suit filed in the Northwestern Judicial District Court in McKenzie County, North Dakota. The First Amendment Class Action Complaint is dated December 22, 2015 and the Order Granting the Defendant’s Motions to Dismiss is dated October 3, 2016.

“Hydrocarbons” has the meaning set forth in the definition of “Assets” above.

“Imbalance” means any imbalance at the (a) wellhead between the amount of Hydrocarbons produced from a Well and allocable to the interests of SM Energy therein and the shares of production from the relevant Well to which SM Energy is entitled or (b) pipeline flange between the amount of Hydrocarbons nominated by or allocated to SM Energy and the Hydrocarbons actually delivered on behalf of SM Energy at that point.

“Income Tax Liability” means any Liability of SM Energy or any of its Affiliates attributable to any federal, state or local income Tax measured by or imposed on the net income of SM Energy or any of its Affiliates that was or is attributable to SM Energy’s or any of its Affiliates’ ownership of an interest in or the operation of the Assets.

“Interim Period” means that period of time from and after the Effective Time up to Closing.

“Knowledge” means with respect to SM Energy, the actual knowledge of the following Persons: Mark Mueller, Senior Vice President and Regional Manager - Rockies; Steve Lauver, Asset Manager - North Rockies; Tim Keating, Land Manager - Rockies; Mark Borla, Operation Manager – Rockies; Garth Hill, Business Development Supervisor; and David Copeland, Executive Vice President, General Counsel and Corporate Secretary.

“Laws” means any constitution, decree, arbitral award or ruling, resolution, law, statute, act, ordinance, rule, directive, order, treaty, code or regulation and any injunction or final non-appealable judgment or any interpretation of the foregoing, as enacted, issued or promulgated by any Governmental Authority.

“Leases” has the meaning set forth in the definition of “Assets” above.

“Liabilities” means any and all claims, causes of actions, payments, charges, judgments, awards, assessments, liabilities, losses, damages, penalties, fines, costs, obligations and expenses, diminution in value, including any attorneys’ fees and legal or other expenses incurred in connection therewith and including liabilities, costs, losses and damages for personal injury or death or property damage.

“Material Adverse Effect” means any change, effect, event, result, occurrence, condition or fact (for the purposes of this definition, each, an “event”) (whether foreseeable or not and whether covered by insurance or not) that has had or would be reasonably likely to have, individually or in the aggregate with any other event or events, a material adverse effect on the ownership, operation or financial condition of the Assets, taken as a whole; provided, however, that “Material Adverse Effect” shall not include such material adverse effects resulting from (a) general changes in oil and gas prices; (b) general changes in industry, economic or political conditions or markets; (c) changes in conditions or developments generally applicable to the oil and gas industry in any or all of the states where the Assets are located; (d) acts of God, including hurricanes and storms; (e) acts or failures to act of Governmental Authorities; (f) civil unrest or similar disorder, terrorist acts or changes in Laws; (g) effects or changes that are cured or no longer exist by the earlier of Closing and the termination of this Agreement pursuant to Section 12.1, without cost to Buyer; (h) changes in GAAP; and (i) changes resulting from the announcement of the transactions contemplated hereby or the performance of the covenants set forth in Article VIII; provided that, in each case, the changes and effects described in clauses (a), (b) and (c) of this definition do not disproportionately affect the Assets, taken as a whole.

“Net Revenue Interest” means, with respect to any Well or Well Location (but limited to the applicable Target Interval set forth in Exhibit B for such Well or Well Location and any other currently producing formation (for such Well)), the interest in and to all Hydrocarbons produced, saved and sold from or allocated to such Well or Well Location, including the proceeds thereof (but limited to the applicable Target Interval set forth in Exhibit B for such Well or Well Location and any other currently producing formation (for such Well)), after giving effect to all Burdens thereon.

“Operating Expenses” means all operating expenses (including Asset Taxes) and capital expenditures incurred in the ownership and operation of the Assets in the ordinary course of business and, where applicable, in accordance with the Applicable Operating Agreement, and overhead costs charged to the Assets under joint operating agreements, but excluding Liabilities attributable to (a) personal injury or death, property damage or violation of any Law, (b) obligations to plug wells and dismantle or decommission facilities, (c) the Remediation of any Environmental Condition under applicable Environmental Laws, (d) obligations with respect to Imbalances, or (e) obligations to pay Working Interests, royalties, overriding royalties or other interest owners revenues or proceeds attributable to sales of Hydrocarbons relating to the Assets, including those held in suspense.

“Operator” means the Person serving as operator under any Applicable Operating Agreement.

“Outside Termination Date” has the meaning set forth in Section 12.1(a).

“Party” and “Parties” have the meanings set forth in the preamble to this Agreement.

(a) lessor’s royalties, non-participating royalties, overriding royalties, reversionary interests and similar burdens upon, measured by or payable out of production if the net cumulative effect of such burdens does not (i) operate to reduce the Net Revenue Interest of SM Energy in any Well or Well Location to an amount less than the Net Revenue Interest set forth in Exhibit B for such Well or Well Location, or (ii) obligate SM Energy to bear a Working Interest for such Well or Well Location in any amount greater than the Working Interest set forth in Exhibit B for such Well or Well Location (unless the Net Revenue Interest for such Asset is greater than the Net Revenue Interest set forth in Exhibit B, in the same proportion as any increase in such Working Interest);

(b) Preferential Rights or similar agreements with respect to which (A) waivers are obtained from the appropriate parties for the transaction contemplated hereby prior to Closing, or (B) required notices have been given for the transaction contemplated hereby to the holders of such rights and the appropriate period for making an election has expired without an exercise of such rights;

(c) required third party consents to assignments or similar agreements with respect to which (A) consents have been obtained from the appropriate parties for the transaction contemplated hereby prior to Closing, or (B) required notices have been given for the transaction contemplated hereby to the holders of such rights and the applicable period (as specified in the contract, agreement or other instrument granting or reserving such rights) for giving notice of objection or withholding of consent has expired without an exercise of such rights or the period within which the failure to respond to such notice is considered under the relevant contract, agreement or other instrument as deemed consent has expired without SM Energy’s receipt of a notice of objection or withholding of consent;

(f) other than such rights that have already been triggered, conventional rights of reassignment;

(g) such Title Defects as Buyer may have waived or is deemed to have waived pursuant to the terms of this Agreement or Title Defects that were not properly asserted by Buyer prior to the Defect Claim Date (other than claims which may be made pursuant to the special warranty of title set forth in the Assignment);

(h) all applicable Laws, and rights reserved to or vested in any Governmental Authority (i) to control or regulate any Asset in any manner; (ii) by the terms of any right, power, franchise, grant, license or permit, or by any provision of Law, to terminate such right, power, franchise grant, license or permit or to purchase, condemn, expropriate or recapture or to designate a purchaser of any of the Assets; (iii) to use such property in a manner which does not materially impair the use of such property for the purposes for which it is currently owned and operated and (iv) to enforce any obligations or duties affecting the Assets to any Governmental Authority, with respect to any franchise, grant, license or permit;

(i) rights of a common owner of any interest in rights-of-way or easements currently held by SM Energy and such common owner as tenants in common or through common ownership to the extent that the same does not materially impair the use or operation of the Assets as currently used and operated;

(j) easements, conditions, covenants, restrictions, servitudes, permits, rights-of-way, surface leases and other rights in the Assets for the purpose of surface operations, roads, alleys, highways, railways, pipelines, transmission lines, transportation lines, distribution lines, power lines, telephone lines and removal of timber, grazing, logging operations, canals, ditches, reservoirs and other like purposes, or for the joint or common use of real estate, rights-of-way, facilities and equipment, (in each case) that do not (i) materially impair the use, ownership or operation of the Assets (as currently owned and operated), (ii) reduce the Net Revenue Interest of SM Energy in any Well or Well Location to an amount less than the Net Revenue Interest set forth in Exhibit B, for such Well or Well Location, or (iii) obligate SM Energy to bear a Working Interest for such Well or Well Location in any amount greater than the Working Interest set forth in Exhibit B, as applicable, for such Well or Well Location (unless the Net Revenue Interest for such Asset is greater than the Net Revenue Interest set forth in Exhibit B, in the same proportion as any increase in such Working Interest);

(l) vendors, carriers, warehousemen’s, repairmen’s, mechanics, workmen’s, materialmen’s, construction or other like Encumbrances arising by operation of Law in the ordinary course of business or incident to the construction or improvement of any property in respect of obligations that are not yet due;

(m) Encumbrances created under Leases and/or Applicable Operating Agreements or by operation of Law in respect of obligations that are not yet due;

(n) any Encumbrance affecting the Assets which is discharged by SM Energy at or prior to Closing;

(o) any Contracts (other than the Unreviewed Material Contracts, provided that if any such Unreviewed Material Contract is provided to Buyer at least five days prior to the Defect Claim Date, then after Closing such Unreviewed Material Contract shall constitute a Permitted Encumbrance), provided further, that such Contracts do not (i) materially impair the use, ownership or operation of the Assets (as currently owned and operated), (ii) reduce the Net Revenue Interest of SM Energy in any Well or Well Location to an amount less than the Net Revenue Interest set forth in Exhibit B, for such Well or Well Location, or (iii) obligate SM Energy to bear a Working Interest for such Well or Well Location in any amount greater than the Working Interest set forth in Exhibit B, as applicable, for such Well or Well Location (unless the Net Revenue Interest for such Asset is greater than the Net Revenue Interest set forth in Exhibit B, in the same proportion as any increase in such Working Interest);

(p) restrictions or exclusions set forth in Exhibit A or Exhibit B, as applicable, and all litigation referenced in Schedule 3.6;

(q) the Leases and all other Encumbrances, Contracts (including the Applicable Contracts), agreements, instruments, obligations, defects and irregularities affecting the Assets that (in each case) do not (i) materially impair the use, ownership, value or operation of the Assets (as currently owned and operated) and that would be acceptable to a reasonable purchaser of oil and gas properties, (ii) reduce the Net Revenue Interest of SM Energy in any Well or Well Location to an amount less than the Net Revenue Interest set forth in Exhibit B for such Well or Well Location, or (iii) obligate SM Energy to bear a Working Interest for such Well or Well Location in any amount greater than the Working Interest set forth in Exhibit B for such Well or Well Location (unless the Net Revenue Interest for such Asset is greater than the Net Revenue Interest set forth in Exhibit B, in the same proportion as any increase in such Working Interest); and

“Person” means any individual, firm, corporation, partnership, limited liability company, joint venture, association, trust, unincorporated organization, Governmental Authority or any other entity.

“Personal Property” means equipment, machinery, fixtures, and other real, immovable, personal, movable and mixed property, including saltwater disposal wells, well equipment, casing, rods, tanks, boilers, buildings, tubing, pumps, motors, fixtures, machinery, compressors, compression equipment, flow lines, and separation facilities, structures, materials, and other items used or held for use in the operation thereof and located upstream of the outlet flange of the relevant custody transfer meter (or, in the case of Hydrocarbon liquids, upstream of the outlet flange in the tanks).

“Preliminary Settlement Statement” has the meaning set forth in Section 2.6(a).

“Proceeding” means any suit, legal action, or legal, administrative, arbitration or other alternative dispute resolution proceeding, hearing or formal investigation.

“Purchase Price” has the meaning set forth in Section 2.2, as such amount may be adjusted from time to time pursuant to Section 2.4 and Section 2.6.

“Records” has the meaning set forth in the definition of “Assets” above.

“Remediation” means, with respect to an Environmental Condition, the implementation and completion of any remedial, removal, response, construction, closure, disposal or other corrective actions required under Environmental Laws to correct or remove such Environmental Condition.

“Remediation Amount” means, with respect to an Environmental Condition, the present value as of the Closing Date of the cost (net to the Asset) of the most cost effective Remediation of such Environmental Condition that is reasonably available.

“Schedules” means the schedule delivered to Buyer prior to the execution of this Agreement and attached to this Agreement, setting forth specific exceptions to SM Energy’s representations and warranties set forth in this Agreement.

“Seismic License” means the Seismic License from SM Energy, as Licensor, to Buyer, as Licensee, covering all geological and geophysical data (including seismic data) included in the Assets, substantially in the form attached hereto as Exhibit E.

“SM Energy” has the meaning set forth in the preamble to this Agreement.

“Subject Special Warranty” means the special warranty of title in the Assignment.

“Surface Contracts” has the meaning set forth in the definition of “Assets” above.

“Suspended Funds” means proceeds of production which SM Energy is holding (including funds held in suspense for unleased interests and penalties and interest) which are owing to third party owners of royalty, overriding royalty, working, or other interests in respect of past production.

“Target Intervals” means the intervals set forth in Exhibit D, as applicable.

“Taxes” means any and all federal, state, local, foreign and other taxes or other assessments, including, without limitation, all net income, gross income, gross receipts, sales, use, ad valorem, transfer, franchise, profits, profit share, license, lease, service, service use, value

added, withholding, payroll, employment, excise, estimated severance, stamp, occupation, premium, property, windfall profit or other taxes of any kind whatsoever, together with any interests, penalties, additions to tax, fines or other additional amounts imposed thereon or related thereto, and the term “Tax” means any one of the foregoing Taxes.

“Title Benefit” means any enforceable and valid right, circumstance or condition that operates to increase the Net Revenue Interest being assigned to Buyer in any Well or Well Location above that shown for such Well or Well Location in Exhibit B, to the extent the same does not cause a greater than proportionate increase in the Working Interest being assigned to Buyer therein above that shown in Exhibit B, in each case as to the Target Intervals for such Well or Well Location shown in Exhibit B.

“Title Benefit Property” has the meaning set forth in Section 6.2(b).

“Title Defect” means any Encumbrance, defect, irregularity or other matter that causes SM Energy not to have Defensible Title in and to any Asset; provided that (but subject to Section 6.2(h)) each Title Defect will be addressed as a single condition with respect to each Well or Well Location affected thereby and such Title Defects will not be aggregated on a per condition basis or otherwise across different Wells or Well Locations; and provided further that the following shall not be considered Title Defects:

(a) defects in the chain of title consisting of the failure to recite marital status in a document or omissions of successions of heirship or estate proceedings, unless Buyer provides affirmative evidence that such failure or omission could reasonably be expected to result in another Person’s superior claim of title to the relevant Asset;

(b) defects arising out of lack of survey, unless a survey is expressly required by applicable Laws;

(c) liens created under deeds of trust, mortgages and similar instruments by the lessor under a Lease covering the lessor’s surface and mineral interests in the land covered thereby that would customarily be accepted in taking oil and gas leases or purchasing undeveloped oil and gas leases and for which the lessee would not customarily seek a subordination of such lien to the oil and gas leasehold estate prior to conducting drilling activities on the Lease, or with respect to which foreclosure proceedings have not been initiated;

(d) defects arising out of lack of corporate or other entity authorization unless Buyer provides affirmative evidence that causes Buyer to reasonably believe such corporate or other entity action may not have been authorized and could reasonably be expected to result in another Person’s superior claim of title to the relevant Asset;

(e) defects based only on a gap in SM Energy’s chain of title in the state’s records as to state Leases, or in the county records as to other Leases, unless such gap is affirmatively shown to exist in such records by an abstract of title, title opinion or landman’s title chain or runsheet, which documents shall be included in a Title Defect Notice;

(f) defects that have been cured by applicable Laws of limitations or prescription; and

(g) any Encumbrance or loss of title resulting from SM Energy’s conduct of business after the Execution Date in compliance with Section 8.1.

For purposes of Section 6.2(c), (i) the inclusion in a Lease of a “most favored nations” clause, and (ii) the terms of an Unreviewed Material Contract that adversely affect the ownership, operation or value of an Asset, restrict the ability of Buyer to drill horizontal wells, or that contain an area of mutual interest clause or other restrictions on competition or require a party thereto to offer any other party thereto to participate in any infrastructure project, shall constitute Title Defects.

“Title Defect Property” has the meaning set forth in Section 6.2(a).

“Title Disputed Matters” has the meaning set forth in Section 6.2(i).

“Transition Services Agreement” means the Transition Services Agreement between SM Energy and Buyer in the form attached hereto as Exhibit G.

“Treasury Regulations” means the regulations promulgated by the United States Department of the Treasury pursuant to and in respect of provisions of the Internal Revenue Code. All references herein to sections of the Treasury Regulations shall include any corresponding provision or provisions of succeeding, similar, substitute, proposed or final Treasury Regulations.

“Unit” has the meaning set forth in the definition of “Assets” above.

“Unreviewed Material Contracts” means any Material Contracts that is listed on Schedule 3.7(a) and marked as “NO*” in the column “Reviewed by Oasis”, provided, that if such Material Contract is an operating agreement that contains terms substantially similar to that certain Joint Operating Agreement, dated as of February 1, 2011, relating to Sections 1 and 12 of Township 150 North, Range 99 West, such operating agreement shall not be deemed an Unreviewed Material Contract.

“Venting Obligations” means the obligation to install, maintain and have operational the equipment required by the Montana Department of Environmental Quality for the Wells to comply with Administrative Rules of Montana Section 17.8.1711, and all costs and expenses incurred in connection therewith.

“Well” has the meaning set forth in the definition of “Assets” above.

“Well Location” means each well location and the lands constituting the assumed spacing unit or approved governmental spacing unit associated with such well location, as set forth in Exhibit B.

“Working Interest” means, with respect to any Well or Well Location (but limited to the applicable Target Interval set forth in Exhibit B for such Well or Well Location and any currently producing formation (for such Well)), the interest in and to such Target Interval for such Well or Well Location or producing formation (for such Well) that is burdened with the obligation to bear and pay costs and expenses of maintenance, development and operations on or in connection with such Target Interval for such Well or Well Location or producing formation (for such Well), but without regard to the effect of any Burdens.


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ARTICLE I DEFINITIONS; INTERPRETATION				1
	*1.1*	*Definitions.*		1
	*1.2*	*Interpretation.*		1

ARTICLE II PURCHASE AND SALE				2
	*2.1*	*Purchase and Sale.*		2
	*2.2*	*Purchase Price.*		2
	*2.3*	*Deposit.*		2
	*2.4*	*Adjustments to Purchase Price.*		3
	*2.5*	*Allocated Value.*		5
	*2.6*	*Settlement; Disputes.*		5
	*2.7*	*Section 1031 Like-Kind Exchange.*		6

ARTICLE III REPRESENTATIONS AND WARRANTIES OF SM ENERGY				7
	*3.1*	*Organization, Existence.*		7
	*3.2*	*Authorization.*		7
	*3.3*	*No Conflicts.*		8
	*3.4*	*Bankruptcy.*		8
	*3.5*	*Foreign Person.*		8
	*3.6*	*Litigation.*		8
	*3.7*	*Material Contracts.*		8
	*3.8*	*No Violation of Laws.*		10
	*3.9*	*Royalties, Etc.*		10
	*3.10*	*Imbalances.*		10
	*3.11*	*Current Commitments.*		10
	*3.12*	*Environmental.*		10
	*3.13*	*Asset Taxes.*		10
	*3.14*	*Brokers’ Fees.*		11
	*3.15*	*Wells.*		11
	*3.16*	*Payout Schedule.*		11
	*3.17*	*Permits.*		12
	*3.18*	*Compliance with Leases and Easements.*		12
	*3.19*	*Suspended Funds.*		12
	*3.20*	*Advance Payments.*		12
	*3.21*	*Partnerships.*		13
	*3.22*	*No Other Representations or Warranties; Disclosed Materials.*		13

ARTICLE IV REPRESENTATIONS AND WARRANTIES OF BUYER				13
	*4.1*	*Organization; Existence.*		13
	*4.2*	*Authorization.*		14
	*4.3*	*No Conflicts.*		14
	*4.4*	*Consents.*		14
	*4.5*	*Bankruptcy.*		14
	*4.6*	*Litigation.*		15


			Page

	*4.7*	*Financing.*		15
	*4.8*	*Independent Evaluation.*		15
	*4.9*	*Brokers’ Fees.*		15
	*4.10*	*Accredited Investor.*		15

ARTICLE V ACCESS / DISCLAIMERS				15
	*5.1*	*Access.*		15
	*5.2*	*Confidentiality.*		17
	*5.3*	*Disclaimers.*		18

ARTICLE VI TITLE MATTERS; CASUALTIES				19
	*6.1*	*SM Energy’s Title.*		19
	*6.2*	*Notice of Title Defects; Defect Adjustments.*		19
	*6.3*	*Casualty or Condemnation Loss.*		24
	*6.4*	*Preferential Rights and Consents to Assign.*		25

ARTICLE VII ENVIRONMENTAL MATTERS				27
	*7.1*	*Environmental Defects.*		27
	*7.2*	*NORM, Wastes and Other Substances.*		29

ARTICLE VIII CERTAIN AGREEMENTS				30
	*8.1*	*Conduct of Business.*		30
	*8.2*	*Governmental Bonds.*		31
	*8.3*	*Notifications.*		31
	*8.4*	*Financial Cooperation.*		31

ARTICLE IX CONDITIONS TO CLOSING				33
	*9.1*	*Buyer’s Conditions to Closing.*		33
	*9.2*	*SM Energy’s Conditions to Closing.*		34

ARTICLE X TAX MATTERS				34
	*10.1*	*Asset Tax Liability.*		34
	*10.2*	*Transfer Taxes.*		35
	*10.3*	*Asset Tax Reports and Returns.*		35
	*10.4*	*Tax Cooperation.*		35
	*10.5*	*Indemnity Payments.*		36

ARTICLE XI CLOSING				36
	*11.1*	*Date of Closing.*		36
	*11.2*	*Place of Closing.*		36
	*11.3*	*Closing Obligations.*		36
	*11.4*	*Records.*		37

ARTICLE XII ACQUISITION TERMINATION AND REMEDIES				37
	*12.1*	*Right of Termination.*		37
	*12.2*	*Effect of Termination.*		38
	*12.3*	*Return of Documentation and Confidentiality.*		40


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ARTICLE XIII ASSUMPTION; SURVIVAL; INDEMNIFICATION				40
	*13.1*	*Assumption by Buyer.*		40
	*13.2*	*Indemnities of SM Energy.*		41
	*13.3*	*Indemnities of Buyer.*		42
	*13.4*	*Limitation on Liability.*		42
	*13.5*	*Express Negligence.*		43
	*13.6*	*Exclusive Remedy for Agreement.*		43
	*13.7*	*Indemnification Procedures.*		43
	*13.8*	*Survival.*		45
	*13.9*	*Non-Compensatory Damages.*		46

ARTICLE XIV MISCELLANEOUS				46
	*14.1*	*Counterparts.*		46
	*14.2*	*Notices.*		46
	*14.3*	*Expenses.*		48
	*14.4*	*Waivers; Rights Cumulative.*		48
	*14.5*	*Relationship of the Parties.*		48
	*14.6*	*Entire Agreement; Conflicts.*		48
	*14.7*	*Governing Law; Jurisdiction; Waiver of Jury Trial.*		49
	*14.8*	*Filings, Notices and Certain Governmental Approvals.*		49
	*14.9*	*Amendment.*		49
	*14.10*	*Parties in Interest.*		49
	*14.11*	*Successors and Permitted Assigns.*		49
	*14.12*	*Publicity.*		49
	*14.13*	*Preparation of Agreement.*		50
	*14.14*	*Severability.*		50
	*14.15*	*Captions.*		50


		If to SM Energy: SM Energy Company
		1775 Sherman Street, Suite 1200 Denver, CO 80203
		Attention:		David W. Copeland – Executive Vice President, General Counsel and Corporate Secretary
		Fax:		303.864.2598
		SM Energy Company 777 North Eldridge Parkway, Suite 1100 Houston, TX 77079
		Attention:		Kenneth J. Knott – Senior Vice President – Business Development and Land
		Fax:		281.677.2810
		If to Buyer: Oasis Petroleum North America LLC 1001 Fannin Street, Suite 1500 Houston, Texas 77002
		Attention:		Niko Lorentzatos, Esq., – Senior Vice President, General Counsel & Corporate Secretary
		Fax:		281.404.9704
		With a copy to: DLA Piper LLP (US) 1000 Louisiana Street, Suite 2800 Houston, Texas 77002
		Attention:		Jack Langlois, Esq.
		Fax:		713.300.6019


Schedules

Schedule 2.5(a)		Allocated Values
Schedule 2.5(b)		Allocation of Purchase Price
Schedule 3.3		No Conflicts
Schedule 3.6		Litigation
Schedule 3.7(a)		Material Contracts
Schedule 3.9		Royalties
Schedule 3.10		Imbalances
Schedule 3.11		AFEs
Schedule 3.12		Environmental Matters
Schedule 3.13		Taxes
Schedule 3.15		Wells
Schedule 3.16		Payout Schedule
Schedule 3.17		Permits
Schedule 3.18		Leases
Schedule 3.19		Suspended Funds
Schedule 3.21		Partnerships
Schedule 6.4		Consents and Preferential Rights
Schedule 8.1		Permitted Operations

Exhibits

Exhibit A		Leases
Exhibit B		Wells and Well Locations
Exhibit C		Form of Assignment
Exhibit D		Target Intervals
Exhibit E		Form of Seismic License Agreement
Exhibit F		Excluded Assets
Exhibit G		Transition Services Agreement
Exhibit H		Salt Water Disposal Systems