PURCHASEAND SALE AGREEMENT BETWEEN CAVALLO ENERGY LP ASSELLER AND LINN ENERGY, LLC ASPURCHASER Executedon December 13, 2006

Section 5.16         Equipment.

The Equipment has been maintained in operable repair, working order and operating condition and is adequate for normal operation of the Assets consistent with current practices.

Section 5.17         Payout Balances.

Schedule 5.17 contains a complete and accurate list of the status of any “payout” balance, as of the Effective Time, for the Wells and Units subject to a reversion or other adjustment at some level of cost recovery or payout (or passage of time or other event other than termination of a Lease by its terms).

Section 5.18         Condemnation.

To Seller’s knowledge, there is no actual or threatened taking (whether permanent, temporary, whole or partial) of any part of the Properties by reason of condemnation or the threat of condemnation.

Section 5.19         Bankruptcy.

There are no bankruptcy, reorganization, or similar arrangement proceedings pending, being contemplated by or, to Seller’s knowledge, threatened against Seller or any Affiliate.

Section 5.20         Benefit Plans.

Seller does not have any obligations or liabilities under Benefits Plans that after Closing could reasonably result in the imposition of a lien upon any of the Assets. “Benefit Plans”  means any employee pension benefit plan (whether or not insured), as defined in Section 3(2) of ERISA, any employee welfare benefit plan (whether or not insured) as defined in Section 3(1) of ERISA, any stock bonus, stock ownership, stock option, stock purchase, stock appreciation rights, phantom stock, or other stock plan (whether qualified or nonqualified), and any bonus or incentive compensation plan sponsored, maintained, or contributed to by Seller or any of its Affiliates for the benefit of any of the present or former directors, officers, employees, agents, consultants, or other similar representatives providing services to or for the Seller or any of its affiliates in connection with the Assets or any such plans which have been so sponsored, maintained, or contributed to within six years prior to the date of this Agreement; provided, however, that such term shall not include (a) routine employment policies and procedures developed and applied in the ordinary course of business and consistent with past practice, including wage, vacation, holiday, and sick or other leave policies, (b) workers compensation insurance, and (c) directors and officers liability insurance”.

Section 5.21         Investment Company.

Seller is not (a) an investment company or a company controlled by an investment company within the meaning of the Investment Company Act of 1940, as amended or (b) subject in any respect to the provisions of said act.

Section 5.22         Wells.

During any period operated by Seller and, to the knowledge of Seller, during other periods all Wells have been produced in compliance with allowables allocated thereto by the

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applicable Governmental Body, except such violations that would not or could not reasonably be expected to have a Material Adverse Effect on the Assets.

Section 5.23         Ownership of Certain Property.

Except as listed or described on Schedule 5.23 and for assets since sold in the ordinary course of business and for the Properties, which is the subject of Article 3, Seller owns all tangible assets purported to be included in the Assets, free and clear of all liens and encumbrances.

Section 5.24         Leases.

Except as set forth on Schedule 5.24, with respect to Leases (but only to Seller’s knowledge with respect to Leases not operated by Seller):

(a)           the Leases have been maintained by Seller according to their terms, in compliance with all material agreements to which the Leases are subject;

(b)           to the knowledge of Seller, no other party to any Lease is in breach or default with respect to any of its material obligations thereunder;

(c)           while owned by Seller, there has not occurred any event, fact or circumstance which with the lapse of time or the giving of notice, or both, would constitute such a breach or default on behalf of Seller or, to the knowledge of Seller, with respect to any other parties; and

(d)           there are no provisions in the Leases or under any Contract or Law applicable to the Leases that increase the royalty share of the lessor thereunder.

Except as set forth in Schedule 5.24, (a) there are no Leases that are subject to a fixed term of duration, and (b) there are no unfulfilled drilling obligations affecting the Leases, other than (i) obligations implied in Law and (ii) provisions requiring optional drilling as a condition of maintaining or earning all or a portion of the Lease.

Section 5.25         Well Status.

Except as set forth in Schedule 5.25, there are no Wells located on the Leases that:

(a)           Seller is currently obligated by Law or Contract to plug and abandon; or

(b)           are subject to exceptions to a requirement to plug and abandon issued by a regulatory authority having jurisdic¬tion over the Properties.

Section 5.26         Suspense.

Schedule 5.26 sets forth a list of all funds held in suspense by Seller on the date hereof that are attributable to the Properties, a description of the source of such funds and the reason they are being held in suspense, the agreement or agreements under which such funds are being held and the name or names of the parties claiming such funds or to whom such funds are owed.

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Section 5.27         NGA

No consent is required in connection with the transaction contemplated hereby under the Natural Gas Policy Act of 1978, as amended. Seller is not an interstate pipeline company within the meaning of the Natural Gas Act of 1938.

ARTICLE 6

REPRESENTATIONS AND WARRANTIES OF PURCHASER

Purchaser represents and warrants to Seller the following:

Section 6.1            Existence and Qualification.

Purchaser is a limited liability company organized, validly existing and in good standing under the laws of the state of Delaware; and Purchaser is duly qualified to do business as a foreign corporation in every jurisdiction in which it is required to qualify in order to conduct its business except where the failure to so qualify would not have a material adverse effect on Purchaser or its properties; and Purchaser is or will be duly qualified to do business as a foreign corporation in the respective jurisdictions where the Assets to be transferred to it are located.

Section 6.2            Power.

Purchaser has the requisite power to enter into and perform this Agreement and consummate the transactions contemplated by this Agreement.

Section 6.3            Authorization and Enforceability.

The execution, delivery and performance of this Agreement, and the performance of the transaction contemplated hereby, have been duly and validly authorized by all necessary action on the part of Purchaser. This Agreement has been duly executed and delivered by Purchaser (and all documents required hereunder to be executed and delivered by Purchaser at Closing will be duly executed and delivered by Purchaser) and this Agreement constitutes, and at the Closing such documents will constitute, the valid and binding obligations of Purchaser, enforceable in accordance with their terms except as such enforceability may be limited by applicable bankruptcy or other similar laws affecting the rights and remedies of creditors generally as well as to general principles of equity (regardless of whether such enforceability is considered in a proceeding in equity or at law).

Section 6.4            No Conflicts.

The execution, delivery and performance of this Agreement by Purchaser, and the transactions contemplated by this Agreement will not (i) violate any provision of the limited liability company agreement of Purchaser, (ii) result in a material default (with due notice or lapse of time or both) or the creation of any lien or 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 agreement to which Purchaser is a party, (iii) violate any judgment, order, ruling, or regulation applicable to Purchaser as a party in interest, or (iv) violate any law, rule or decree applicable to Purchaser or any of its assets, or (v) require any

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filing with, notification of or consent, approval or authorization of any Governmental Body or authority, except any matters described in clauses (ii), (iii), (iv) or (v) above which would not have a material adverse affect on Purchaser.

Section 6.5            Liability for Brokers’ Fees.

Seller shall not directly or indirectly have any responsibility, liability or expense, as a result of undertakings or agreements of Purchaser, for brokerage fees, finder’s fees, agent’s commissions or other similar forms of compensation in connection with this Agreement or any agreement or transaction contemplated hereby, except to Simmons & Company International and Griffis & Associates.

Section 6.6            Litigation.

As of the date of the execution of this Agreement, there are no actions, suits or proceedings pending, or to Purchaser’s knowledge, threatened in writing before any Governmental Body against Purchaser or any subsidiary of Purchaser which are reasonably likely to impair materially Purchaser’s ability to perform its obligations under this Agreement.

Section 6.7            Financing.

Purchaser has sufficient cash, available lines of credit or other sources of immediately available funds (in United States dollars) to enable it to pay the Closing Payment to Seller at the Closing.

Section 6.8            Limitation.

Except for the representations and warranties expressly made by Seller in Article 5 of this Agreement, or in any certificate furnished or to be furnished to Purchaser pursuant to this Agreement, Purchaser acknowledges that (i) there are no representations or warranties, express or implied, as to the Assets or prospects thereof, and (ii) Purchaser has not relied upon any oral information provided by Seller.

ARTICLE 7

COVENANTS OF THE PARTIES

Section 7.1            Access.

(a)  Between the date of execution of this Agreement and continuing until ten (10) days prior to the Closing Date, Seller will give Purchaser and its representatives access to the Assets and access to and the right to copy, at Purchaser’s expense, the Records in Seller’s possession, for the purpose of conducting an investigation of the Assets, but only to the extent that Seller may do so without violating any obligations to any third party and to the extent that Seller has authority to grant such access without breaching any restriction binding on Seller. Such access by Purchaser shall be limited to Seller’s normal business hours, and any weekends and after hours requested by Purchaser that can be reasonably accommodated by Seller, and Purchaser’s investigation shall be conducted in a manner that minimizes interference with the operation of the Assets. All information obtained by Purchaser and its representatives under this Section shall be subject to the terms of Section 7.7 and the terms of

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that certain confidentiality agreement between Seller and Purchaser dated August 1, 2006 (the “Confidentiality Agreement”).

(b)  PURCHASER ACKNOWLEDGES THAT EXCEPT TO THE EXTENT CONTAINED IN AN EXPRESS REPRESENTATION, WARRANTY OR COVENANT IN ARTICLES 3 AND 5 OF THIS AGREEMENT, THE CERTIFICATE OF SELLER TO BE DELIVERED PURSUANT TO SECTION 9.2(d) OR THE CONVEYANCE, SELLER HAS MADE NO COVENANTS, REPRESENTATIONS OR WARRANTIES, WHETHER ORAL OR WRITTEN, AND SELLER DISCLAIMS ALL COVENANTS, REPRESENTATIONS AND WARRANTIES, STATUTORY, EXPRESS OR IMPLIED, AS TO THE ACCURACY OR COMPLETENESS OF INFORMATION OBTAINED BY PURCHASER UNDER THIS SECTION, OR AS TO SELLER’S TITLE TO THE ASSETS, AND IN ENTERING INTO AND PERFORMING THIS AGREEMENT, PURCHASER HAS RELIED AND WILL RELY SOLELY UPON ITS INDEPENDENT INVESTIGATION OF, AND JUDGMENT WITH RESPECT TO, THE ASSETS, THEIR VALUE AND SELLER’S TITLE THERETO AND UPON THOSE COVENANTS, REPRESENTATIONS AND WARRANTIES EXPRESSLY SET FORTH IN ARTICLES 3, 5 AND 7 OF THIS AGREEMENT, THE CERTIFICATE OF SELLER TO BE DELIVERED PURSUANT TO SECTION 9.2(d) OR THE CONVEYANCE-.  PURCHASER UNDERSTANDS THAT SELLER MAKES NO COVENANT, REPRESENTATION OR WARRANTY OTHER THAN AS SPECIFICALLY CONTAINED HEREIN WITH REGARD TO THE ASSETS AND THAT IT IS PURCHASING THE ASSETS “WHERE IS” AND “AS IS.”  FURTHER, SELLER SPECIFICALLY DISCLAIMS ANY REPRESENTATION OR WARRANTY CONCERNING THE ACCURACY OR COMPLETENESS OF ANY DOCUMENTS, RECORDS OR OTHER INFORMATION PROVIDED WITH REGARD TO THE ASSETS.

Section 7.2            Government Reviews.

Seller and Purchaser shall in a timely manner (a) make all required filings, if any, with and prepare applications to and conduct negotiations with, each governmental agency as to which such filings, applications or negotiations are necessary or appropriate in the consummation of the transactions contemplated hereby specifically including but not limited to the HSR Act, (b) provide such information as each may reasonably request to make such filings, prepare such applications and conduct such negotiations, (c) request early termination or waiver of any applicable waiting period under the HSR Act. Each party shall cooperate with and use all reasonable efforts to assist the other with respect to such filings, applications and negotiations.

Section 7.3            Notification of Breaches.

Until the Closing,

(a)  Purchaser shall notify Seller promptly after Purchaser obtains actual knowledge that any representation or warranty of Seller contained in this Agreement is untrue in any material respect or will be untrue in any material respect as of the Closing Date or that any covenant or agreement to be performed or observed by Seller prior to or on the Closing Date has not been so performed or observed in any material respect.

(b)  Seller shall notify Purchaser promptly after Seller obtains actual knowledge that any representation or warranty of Purchaser contained in this Agreement is untrue in any material respect or will be untrue in any material respect as of the Closing Date or that any covenant or agreement to be performed or observed by Purchaser prior to or on the Closing Date has not been so performed or observed in a material respect.

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If any of Purchaser’s or Seller’s representations or warranties is untrue or shall become untrue in any material respect between the date of execution of this Agreement and the Closing Date, or if any of Purchaser’s or Seller’s covenants or agreements to be performed or observed prior to or on the Closing Date (other than on a specified date) shall not have been so performed or observed in any material respect, but if such breach of representation, warranty, covenant or agreement shall (if curable) be cured by the Closing (or, if the Closing does not occur, by the date set forth in Section 10.1), then such breach shall be considered not to have occurred for all purposes of this Agreement.

Section 7.4            Letters-in-Lieu; Assignments; Operatorship.

(a)  Seller will execute on the Closing Date letters in lieu of division and transfer orders relating to the Assets on forms prepared by Purchaser and reasonably satisfactory to Seller to reflect the transaction contemplated hereby.

(b)  Seller will prepare and Seller and Purchaser will execute on the Closing Date all assignments necessary to convey to Purchaser all federal or state leases in the form as prescribed by the applicable governmental body and otherwise acceptable to Purchaser and Seller.

(c)  Seller will assist Purchaser in its efforts to succeed Seller as operator of any Wells included in the Assets.    Seller makes no representation and does not warrant or guarantee that Purchaser will succeed in being appointed successor operator.  Purchaser shall promptly, following Closing, file all appropriate forms, pit permit transfers and declarations or bonds with federal and state agencies relative to its assumption of operatorship.  For all Seller Operated Assets, Seller shall execute and deliver to Purchaser and Purchaser shall promptly file the forms transferring operatorship of such Assets to Purchaser.

Section 7.5            Public Announcements.

Until the Closing, neither party shall make any press release or other public announcement regarding the existence of this Agreement, the contents hereof or the transactions contemplated hereby without the prior written consent of the other; provided, however, the foregoing shall not restrict disclosures by Purchaser or Seller which are required by applicable securities or other laws or regulations or the applicable rules of any stock exchange having jurisdiction over the disclosing party or its Affiliates; and provided, further, that Purchaser may disclose the existence and contents of this Agreement and the transactions contemplated hereby to the Standard & Poor’s and Moody’s rating agencies (provided that such agencies are obligated to keep such information confidential.

Section 7.6            Operation of Business.

Except as set forth on Schedule 7.6, until the Closing, Seller (i) will operate its business in the ordinary course, (ii) will not, without the prior written consent of Purchaser, which consent shall not be unreasonably withheld or delayed, commit to any operation, or series of related operations, reasonably anticipated by Seller to require future capital expenditures by the owner of the Assets in excess of $50,000, or make any capital expenditures in excess of $50,000.00 except for matters set forth on Schedule 5.9, or terminate, materially amend, execute or extend any material agreements affecting the Assets, (iii) will maintain insurance coverage on the Assets presently furnished by nonaffiliated third parties in the amounts and of the types presently in force, (iv) will use commercially reasonable efforts to maintain in full force and effect

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all Leases, (v) will maintain all material governmental permits and approvals affecting the Assets, (vi) will not transfer, farmout, sell, hypothecate, encumber or otherwise dispose of any material Assets except for sales and dispositions of oil and gas production and Equipment made in the ordinary course of business consistent with past practices and (vii) will not commit to do any of the foregoing. Notwithstanding anything contained in this Agreement to the contrary, all proceeds received by Seller prior to Closing from the sale of surplus and inventoried Equipment shall be the property of Seller, and there shall be no adjustment to the Purchase Price for same. Purchaser’s approval of any action restricted by this Section 7.6 shall be considered granted within 10 days (unless a shorter time is reasonably required by the circumstances and such shorter time is specified in Seller’s written notice) of Seller’s notice to Purchaser requesting such consent unless Purchaser notifies Seller to the contrary during that period. In the event of an emergency, Seller may take such action as a prudent operator would take and shall notify Purchaser of such action promptly thereafter.

Notwithstanding anything to the contrary in this Agreement, Seller shall have no liability to Purchaser for the incorrect payment of delay rentals, royalties, shut-in payment payments or similar payments made during the period from the Effective Time to the Closing Date or for failure to make such payments through mistake or oversight (including Seller’s negligence), except with respect to the right of Purchaser to assert Title Defects as provided in Article 3.

Purchaser acknowledges that Seller may own an undivided interest in certain of the Assets and Purchaser agrees that the acts or omissions of the other working interest owners who are not affiliated with Seller shall not constitute a violation of the provisions of this Article 7 nor shall any action required by a vote of working interest owners constitute such a violation so long as Seller has voted its interest in a manner consistent with the provisions of this Article 7.

Section 7.7            Indemnity Regarding Access.

Purchaser, on behalf of itself and the Purchaser Indemnitees, agrees to indemnify, defend and hold harmless Seller, Seller Indemnitees, the other owners of interests in the Assets, and all such Persons’ directors, officers, employees, agents and representatives from and against any and all claims, liabilities, losses, costs and expenses (including court costs and reasonable attorneys’ fees), including claims, liabilities, losses, costs and expenses attributable to personal injuries, death, or property damage, arising out of or relating to access to the Assets by the Purchaser Indemnitees, the Records and other related activities or information prior to the Closing by Purchaser, its Affiliates, or its or their directors, officers, employees, agents or representatives, 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 EXCLUDING, HOWEVER, ANY CLAIMS, LIABILITIES, LOSSES, COSTS OR EXPENSES CAUSED BY THE GROSS NEGLIGENCE OR WILLFUL MISCONDUCT OF ANY INDEMNIFIED PERSON.

Section 7.8            Intentionally deleted.

Section 7.9            Consents and Preferential Rights.

Should a third party fail to exercise its preferential right to purchase as to any portion of the Assets prior to Closing and the time for exercise or waiver has not yet expired, subject to the

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remaining provisions of this Section 7.9, such Assets shall be included in the transaction at Closing and the following procedures shall be applicable:

(a)  The Conveyance from Seller to Purchaser of the Assets affected by such preferential rights shall be delivered into a mutually agreeable escrow together with the Allocated Value of the affected Assets.  Purchaser shall take beneficial possession of the affected Assets and be entitled to all production, income, proceeds, receipts and credits to which Purchaser would be entitled under Section 11.1, and shall indemnify Seller against any matters for which Purchaser would be liable under the terms of Section 11.3 with respect to the affected Assets. Title to the affected Assets shall not transfer, and the Conveyance shall not be released from escrow, until such preferential right to purchase has been waived or has expired.

(b)  Seller shall, at its sole expense, continue to use commercially reasonable efforts to obtain the waiver of the preferential rights and shall continue to be responsible for the compliance therewith.

(c)  Should the holder of the preferential right exercise same, Purchaser and Seller agree to cause the affected Assets to be transferred to such holder on the terms and provisions set out herein and in the applicable preferential right provision, and the Allocated Value will be released from escrow to Purchaser.  In the event that the Allocated Value is placed in an interest bearing escrow account, any accrued interest will be paid to Purchaser.  It is further agreed that the cost, expense or any other charge of the escrow agent, if any, will be paid from the Allocated Value prior to release. In such event, Seller shall be entitled to retain the consideration paid by the third party.

(d)  If the restriction is waived or removed or if the time limit otherwise set forth relating to the preferential right expires, Seller and Purchaser shall take all action necessary to (i) ensure that the affected Assets are promptly conveyed out of escrow to Purchaser, and (ii) the Allocated Value will be released from escrow to Seller.  In the event that the Allocated Value is placed in an interest bearing escrow account, any accrued interest will be paid to Purchaser.  It is further agreed that the cost, expense or any other charge of the escrow agent, if any, will be paid from the Allocated Value prior to release.

(e)  Once the provisions of subparagraph (d) above are satisfied and all obligations in connection therewith have been fulfilled, the Closing shall be deemed to have occurred for all purposes hereunder with respect to the affected Assets.

Should any third party bring any suit, action or other proceeding seeking to restrain, enjoin or otherwise prohibit the consummation of the transactions contemplated hereby in connection with a claim to enforce preferential rights, the Assets affected by such suit, action or other proceeding shall be excluded from the Assets transferred at Closing and the Purchase Price shall be reduced by the Allocated Value of such excluded Assets.  Promptly after the suit, action or other proceeding is dismissed or settled or a judgment is rendered, Seller shall sell to Purchaser and Purchaser shall purchase from Seller all such Assets not being sold to the third party for a purchase price equal to the Allocated Value of such Assets, adjusted as provided in Section 2.2.

Section 7.10         Tax Matters.

 (a)  Subject to the provisions of Section 12.3, Seller shall be responsible for all Taxes (other than ad valorem, property, severance, production and similar Taxes based upon or

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measured by the ownership or operation of the Assets or the production of Hydrocarbons therefrom, which are addressed in Section 1.4) attributable to any period of time at or prior to Effective Time, including without limitation income Taxes arising as a result of the gain recognized on the transfer of the Assets. Purchaser shall be responsible for all such Taxes attributable to any period of time after the Effective Time. Regardless of which party is responsible, Seller shall handle payment to the appropriate Governmental Body of all Taxes with respect to the Assets which are required to be paid prior to Closing (and shall file all Tax Returns with respect to such Taxes). If requested by Purchaser, Seller will assist Purchaser with preparation of all ad valorem and property Tax Returns due on or before December 31, 2006 (including any extensions requested). Seller shall deliver to Purchaser within (30) days of filing copies of all Tax Returns filed by Seller after the Closing Date relating to the Assets and any supporting documentation provided by Seller to taxing authorities.

(b)  Purchaser agrees to cooperate (at no cost or liability to Purchaser) with Seller so that Seller’s transfer of the Assets to Purchaser shall, at Seller’s election, be accomplished in a manner enabling the transfer of all or part of the Assets to qualify as a part of a like-kind exchange of property by Seller within the meaning of Section 1031 of the Code.  If Seller so elects, Purchaser shall reasonably cooperate with Seller to effect such like-kind exchange, which cooperation shall include, without limitation, taking such actions as Seller reasonably requests in order to pay the Purchase Price in a manner which enables such transfer to qualify as part of a like-kind exchange of property within the meaning of Section 1031 of the Code, and Purchaser agrees that Seller may assign its rights (but not its obligations) under this Agreement to an escrow agent acting as a qualified intermediary under United States Treasury Regulations, to qualify the transfer of the Purchase Price as a part of a like-kind exchange of property within the meaning of Section 1031 of the Code.

Section 7.11         Further Assurances.

After Closing, Seller and Purchaser each agrees to take such further actions and to execute, acknowledge and deliver all such further documents as are reasonably requested by the other party for carrying out the purposes of this Agreement or of any document delivered pursuant to this Agreement.

Section 7.12         Historical Revenue and Expense Information of Seller related to the Assets.

(a) Seller has provided to Purchaser a draft of “Statement of Direct Revenues and Direct Expenses for the Panhandle Properties” for the calendar years 2003 and 2004, and for the period January 1, 2005 to October 5, 2005 being the periods prior to Seller’s purchase of the Properties, and the Seller 2005 Audited Financial Statements. On or prior to Closing, Seller shall cause to be delivered to Seller (i) the Seller 2005 Audited Financial Statements to be updated to include unaudited reserves for such period and (ii) an Audited Statement of Direct Revenues and Direct Expenses for the Panhandle Properties (the “Historical Revenue and Expense Statements”).

(b) At Closing, Seller will provide to Purchaser the Seller 2006 Unaudited Financial Statements.  Seller shall cause such financial statements to present fairly in all material respects, in accordance with GAAP consistently applied, the financial condition and results of operation of Seller as of and for the periods set forth therein, provided that the Seller 2006

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Unaudited Financial Statements do not contain footnotes and are subject to normal recurring year end adjustments.

(c) Seller shall use commercially reasonable efforts to cause the Seller Financial Statements to be modified so that the Seller Financial Statements comply in all material respects with the requirements of Regulation S-X, as adopted by the SEC (including a footnote satisfying the requirements of FAS 69, provided that with respect to 2006 such footnote shall be provided only if necessary and, if so, only upon completion of Seller’s 2006 audit). Seller consents to the inclusion or incorporation by reference of the Seller S-X Financial Statements in any registration statement, report or other document of Purchaser or any of its Affiliates to be filed with the SEC in which Purchaser or such Affiliates reasonably determines that the Seller S-X Financial Statements are required to be included or incorporated by reference to satisfy any rule or regulation of the SEC or to satisfy relevant disclosure obligations under the Securities Act or the Exchange Act.  Seller shall use commercially reasonable efforts to cause Hein & Associates LLP to consent to the inclusion or incorporation by reference of its audit opinion with respect to the Seller 2005 Audited Financial Statements and to perform a review of the Seller 2006 Unaudited Financial Statements pursuant to Statement on Auditing Standards No. 100, to be included in any such registration statement, report or other document.  Seller shall execute and deliver to Hein & Associates LLP such representation letters, in form and substance customary for representation letters provided to external audit firms by management of the company whose financial statements are the subject of an audit or are subject of a review pursuant to Statement of Accounting Standards 100 (Interim Financial Information) (or any successor statement related to the topic of accountants’ comfort letters), as may be reasonably requested by Hein & Associates LLP, with respect to the Seller S-X Financial Statements.  Seller shall use commercially reasonable efforts to cause Hein & Associates LLP to deliver a comfort letter in form and substance customary with respect to offerings of securities registered under the Securities Act with respect to the Seller S-X Financial Statements and financial information related to Seller that is included in a prospectus or offering memorandum related to an offering of securities of the type for which comfort letters are customarily provided to the underwriters or initial purchasers in connection therewith.  Any costs related to any of the foregoing described in Sections 7.11(b) and (c), including the preparation of such S-X financial statements, SAS 100 reviews, obtaining any consent of, or comfort letters from, Hein & Associates, shall be borne by Purchaser or reimbursed by Purchaser to Seller.

(d)           Seller shall afford to Purchaser and any of its Affiliates, and their respective accountants, counsel and representatives, at Purchaser’s cost and expense full reasonable access during normal business hours for three years following the Closing Date to all financial and accounting records, and contracts and other documentation reasonably related thereto, of Seller to the extent (i) such records and other information are not part of the books and records of Seller delivered to Purchaser pursuant to this Agreement and (ii) such records and other information is reasonably necessary for Purchaser and any of its Affiliates in connection with (A) the preparation of pro forma financial statements related to the transactions contemplated by this Agreement, (B) the preparation of any report or other filing required for compliance with federal or state securities laws, including prospectuses or offering memoranda relating to securities offerings, by Purchaser or any of its Affiliates, (C) a subsequent audit of the financial statements of Seller in connection with a change in external audit firms, (D) a subsequent restatement of the financial statements of the financial statements of Seller or (E) any inquiry, investigation or legal proceeding by any Governmental Authority related to the financial statements of Seller; provided that Purchaser and its Affiliates may not wanive any legal or other privilege in connection with any such inquiry, investigation, or legal proceeding.

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(e)           Seller and the officers of Seller or Seller’s Affiliates do not make any representations or warranties with respect to the Seller Financial Statements. Purchaser hereby releases and shall cause all Purchaser Indemnified Parties to release Seller Indemnified Parties from any Damages relating to the Seller Financial Statements.

ARTICLE 8

CONDITIONS TO CLOSING

Section 8.1            Conditions of Seller to Closing.

The obligations of Seller to consummate the transactions contemplated by this Agreement are subject, at the option of Seller, to the satisfaction on or prior to Closing of each of the following conditions:

(a)  Representations. The representations and warranties of Purchaser set forth in Article 6 shall be true and correct in all respects (including representations and warranties that are qualified by materiality or Material Adverse Effect, which shall be true and correct in all respects) as of the date of this Agreement and as of the Closing Date as though made on and as of the Closing Date (except that representations and warranties that are made as of or refer to a specified date need only be true and correct on and as of such specified date), except in all cases for such breaches, if any, as would not have a Material Adverse Effect;

(b)  Performance. Purchaser shall have performed and observed, in all material respects, all covenants and agreements to be performed or observed by it under this Agreement prior to or on the Closing Date;

(c)  Pending Litigation. No suit, action or other proceeding by a third party (including any Governmental Body) seeking to restrain, enjoin or otherwise prohibit the consummation of the transactions contemplated by this Agreement shall be pending before any Governmental Body; provided, however, Closing shall proceed notwithstanding any suits, actions or other proceedings seeking to restrain, enjoin or otherwise prohibit the consummation of the transactions contemplated hereby brought by holders of preferential purchase rights seeking to enforce such rights with respect to Assets with aggregate Allocated Values of less than Five Million and No/100 Dollars ($5,000,000.00), and the Assets subject to such suits, actions or other proceedings shall be treated in accordance with Section 7.9;

(d)  Deliveries. Purchaser shall have delivered to Seller duly executed counterparts of the Conveyances and the other documents and certificates to be delivered by Purchaser under Section 9.3;

(e)  Title Defects, Casualty or Condemnation and Environmental Liabilities. The aggregate amount of (i) the aggregate amount of all Title Defect Amounts for Title Defects covered by Section 3.4(d)(i), less the aggregate amount of all Title Benefit Amounts for Title Benefits, as determined under Article 3, (ii) the aggregate amount of losses from casualties to the Assets and takings of Assets as determined under Section 3.6 (excluding any such losses covered by clauses (i), (ii) of section 3.6 and the Allocated Value of any Property covered by clause (iii) of Section 3.6) and (iii) the aggregate amount of adjustments to the Purchase Price for

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Environmental Liabilities covered by Section 4.4(a), shall not exceed Twenty Five Million and No/100 Dollars ($25,000,000.00);

(f)  Payment. Purchaser shall be ready and able to pay the Closing Payment.

Section 8.2            Conditions of Purchaser to Closing.

The obligations of Purchaser to consummate the transactions contemplated by this Agreement are subject, at the option of Purchaser, to the satisfaction on or prior to Closing of each of the following conditions:

(a)  Representations. The representations and warranties of Seller set forth in Article 5 shall be true and correct in all respects (including representations and warranties that are qualified by materiality or Material Adverse Effect, which shall be true and correct in all respects) as of the date of this Agreement and as of the Closing Date as though made on and as of the Closing Date (except that representations and warranties that are made as of or refer to a specified date need only be true and correct on and as of such specified date), except in all cases for such breaches, if any, as would not have a Material Adverse Effect;

(b)  Performance. Seller shall have performed and observed, in all material respects, all covenants and agreements to be performed or observed by it under this Agreement prior to or on the Closing Date;

(c)  Pending Litigation. No suit, action or other proceeding by a third party (including any Governmental Body) seeking to restrain, enjoin or otherwise prohibit the consummation of the transactions contemplated by this Agreement shall be pending before any Governmental Body; provided, however, Closing shall proceed notwithstanding any suits, actions or other proceedings seeking to restrain, enjoin or otherwise prohibit the consummation of the transactions contemplated hereby brought by holders of preferential purchase rights seeking to enforce such rights with respect to Assets with aggregate Allocated Values of less than Five Million and No/100 Dollars ($5,000,000.00), and the Assets subject to such suits, actions or other proceedings shall be treated in accordance with Section 7.9;

(d)  Deliveries. Seller shall be ready and able to deliver to Purchaser duly executed counterparts of the Conveyances and the other documents and certificates to be delivered by Seller under Section 9.2;

(e)  Title Defects, Casualty or Condemnation and Environmental Liabilities. The aggregate amount of (i) the aggregate amount of all Title Defect Amounts for Title Defects covered by Section 3.4(d)(i), less the aggregate amount of all Title Benefit Amounts for Title Benefits, as determined under Article 3, (ii) the aggregate amount of losses from casualties to the Assets and takings of Assets as determined under Section 3.6 (excluding any such losses covered by clauses (i), (ii) of section 3.6 and the Allocated Value of any Property covered by clause (iii) of Section 3.6) and (iii) the aggregate amount of adjustments to the Purchase Price for Environmental Liabilities covered by Section 4.4(a), shall not exceed Twenty Five Million and No/100 Dollars ($25,000,000.00).

]

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ARTICLE 9

CLOSING

Section 9.1            Time and Place of Closing.

(a) Consummation of the purchase and sale transaction as contemplated by this Agreement (the “Closing”), shall, unless otherwise agreed to in writing by Purchaser and Seller, take place at the offices of Akin, Gump, Strauss, Hauer & Feld LLP, 1111 Louisiana, 44th Floor, Houston, Texas, at 10:00 a.m., local time, on (i) February 1, 2007if the Environmental Consultant completes the Assessment on or prior to January 3, 2007 (ii) on March 1, 2007 if the Environmental Consultant fails to complete the Assessment on or prior to January 3, 2007 or (iii) if all conditions in Article 8 to be satisfied prior to Closing have not yet been satisfied or waived, as soon thereafter as such conditions have been satisfied or waived, subject to the rights of the parties under Article 10.  If Closing occurs mid-month, Operatorship of the Properties shall be transferred to Purchaser at the end of the month in which Closing occurs.

(b)  The date on which the Closing occurs is herein referred to as the “Closing Date.”

Section 9.2            Obligations of Seller at Closing.

At the Closing, upon the terms and subject to the conditions of this Agreement, Seller shall deliver or cause to be delivered to Purchaser, among other things, the following:

(a)  Conveyances of the Assets, in sufficient duplicate originals to allow recording in all appropriate jurisdictions and offices, duly executed by Seller;

(b)  assignments, on appropriate forms, of state and of federal leases comprising portions of the Assets, duly executed by Seller;

(c)  letters-in-lieu of transfer orders covering the Assets that are provided by Purchaser pursuant to Section 7.4, duly executed by Seller;

(d)  a certificate duly executed by an authorized corporate officer of Seller, dated as of Closing, certifying on behalf of Seller that to the best of its knowledge the conditions set forth in Sections 8.2(a), 8.2(b) and 8.2(c) have been fulfilled; and

(e)  an executed statement described in Treasury Regulation §1.1445-2(b)(2) certifying that Seller is not a foreign person within the meaning of the Code.

Section 9.3            Obligations of Purchaser at Closing.

At the Closing, upon the terms and subject to the conditions of this Agreement, Purchaser shall deliver or cause to be delivered to Seller, among other things, the following:

(a)           a wire transfer of the Closing Payment in same-day funds;

(b)           Conveyance of the Assets, duly executed by Purchaser;

(c)           letters-in-lieu of transfer orders covering the Assets, duly executed by Purchaser; and

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(d)           a certificate by an authorized corporate officer of Purchaser, dated as of Closing, certifying on behalf of Purchaser that the conditions set forth in Sections 8.1(a), 8.1(b) and 8.1(c) have been fulfilled.

Section 9.4            Closing Payment and Post-Closing Purchase Price Adjustments.

(a)  Not later than five (5) Business Days prior to the Closing Date, Seller shall prepare and deliver to Purchaser, based upon the best information available to Seller, a preliminary settlement statement estimating the Adjusted Purchase Price after giving effect to all Purchase Price adjustments set forth in Section 2.2 and the Deposit. The estimate delivered in accordance with this Section 9.4(a) shall constitute the dollar amount to be paid by Purchaser to Seller at the Closing (the “Closing Payment”).

(b)  As soon as reasonably practicable after the Closing but not later than ninety (90) days following the Closing Date, Seller shall prepare and deliver to Purchaser a statement setting forth the final calculation of the Adjusted Purchase Price and showing the calculation of each adjustment, based, to the extent possible on actual credits, charges, receipts and other items before and after the Effective Time and taking into account all adjustments provided for in this Agreement. Seller shall at Purchaser’s request supply reasonable documentation available to support any credit, charge, receipt or other item. As soon as reasonably practicable but not later than the 30th day following receipt of Seller’s statement hereunder, Purchaser shall deliver to Seller a written report containing any changes that Purchaser proposes be made to such Statement. The parties shall undertake to agree on the final statement of the Adjusted Purchase Price no later than one hundred fifty (150) days after the Closing Date. In the event that the parties cannot agree on the Adjusted Purchase Price within one hundred fifty (150) days after closing, such determination will be automatically referred to an Independent Expert of the parties choosing with at least ten (10) years of oil and gas accounting experience for arbitration.  If the parties are unable to agree upon an Independent Expert, then such Independent Expert shall be selected by any Federal District Court Judge or State District Court Judge in Harris County.  The burden of proof in the determination of the Adjusted Purchase Price shall be upon Purchaser.  The Independent Expert shall conduct the arbitration proceedings in Houston, Texas in accordance with the Commercial Arbitration Rules of the American Arbitration Association, to the extent such rules do not conflict with the terms of this Section. The Independent Expert’s determination shall be made within 30 days after submission of the matters in dispute and shall be final and binding on both parties, without right of appeal. In determining the proper amount of any adjustment to the Purchase Price, the Independent Expert shall not increase the Purchase Price more than the increase proposed by Seller nor decrease the Purchase Price more than the decrease proposed by Purchaser, as applicable. The Independent Expert shall act as an expert for the limited purpose of determining the specific disputed matters submitted by either party and may not award damages or penalties to either party with respect to any matter. Seller and Purchaser shall each bear its own legal fees and other costs of presenting its case. Each party shall bear one-half of the costs and expenses of the Independent Expert. Within 10 days after the date on which the parties or the Independent Expert, as applicable, finally determines the disputed matters, (i) Purchaser shall pay to Seller the amount by which the Adjusted Purchase Price exceeds the Closing Payment or (ii) Seller shall pay to Purchaser the amount by which the Closing Payment exceeds the Adjusted Purchase Price, as applicable. Any post-closing payment pursuant to this Section 9.4 shall bear interest from the Closing Date to the date of payment at the Agreed Interest Rate.

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(c)  All payments made or to be made hereunder to Seller shall be by electronic transfer of immediately available funds to the account of Seller pursuant to the wiring instructions reflected in Schedule 9.4 (c). All payments made or to be made hereunder to Purchaser shall be by electronic transfer of immediately available funds to a bank and account specified by Purchaser in writing to Seller.

ARTICLE 10

TERMINATION

Section 10.1         Termination.

This Agreement shall be terminated: (i) at any time prior to Closing by the mutual prior written consent of Seller and Purchaser; (ii) if Closing has not occurred on or before (a) February 8, 2007 if the Environmental Consultant completes the Assessment on or prior to January 3, 2007 or (b) March 1, 2007, if Environmental Consultant fails to complete the Assessment on or prior to January 3, 2007; (iii) by Purchaser if any condition set forth in Section 8.2 has not been satisfied at Closing or (iv) by Seller if any condition set forth in Section 8.1 has not been satisfied at Closing.

Section 10.2         Effect of Termination.

If this Agreement is terminated pursuant to Section 10.1, except as set forth in this Section 10.2 and in Section 10.3, this Agreement shall become void and of no further force or effect (except for the provisions of Sections 5.6, 6.5, 7.1, 7.7 and 12.4 and of the Confidentiality Agreement which shall continue in full force and effect) and Seller 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 party without any restriction under this Agreement.  Notwithstanding anything to the contrary in this Agreement, the termination of this Agreement under Section 10.1 (ii) shall not relieve any party from liability for any willful or negligent failure to perform or observe in any material respect any of its agreements or covenants contained herein which are to be performed or observed at or prior to Closing.

Section 10.3         Distribution of Deposit Upon Termination

(a)           If Seller terminates this Agreement (i) because Purchaser has failed to comply with Section 8.1(a), (b), (d), or (f); or (ii) as the result of a material default or breach by Purchaser of Purchaser’s obligations hereunder, then Seller shall be entitled to, at its election (A) any remedies available at Law, including the recovery of all Damages or (B) retain the Deposit, as liquidated damages, free of any claims by Purchaser or any other person with respect thereto, and Purchaser shall have no further liability whatsoever to Seller, except such as may arise under the provisions of Sections, 6.5, 7.1, 7.7, 12.4 or the Confidentiality Agreement. Purchaser expressly agrees that if Purchaser has failed to comply with Section 8.1(a), (b), (d), or (f); or (ii) is in material default or breach of Purchaser’s obligations hereunder, then Seller in lieu of termination of this Agreement, shall be entitled to specific performance of this Agreement, it being specifically agreed that monetary damages may not be sufficient to compensate Seller. If Seller elects to terminate this Agreement and proceed pursuant to the provisions of Section 10.3(i)(A) above and elects to not retain the Deposit as liquidated damages, then Seller shall cause the Deposit to be deposited and held in escrow with Bank of America, N.A. Upon rendition of a non-appealable final judgment or award on the claims related to such termination, the Deposit and any interest earned thereon shall be distributed to Seller in an amount equal to the judgment or award obtained by Seller, and the

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balance, if any, to Purchaser.  If Seller elects to seek specific performance of this Agreement pursuant to this Section 10.3, the Deposit shall be held by Seller, not as liquidated damages, until a non-appealable final judgment or award on Seller’s claim for specific performance is rendered at which time the Deposit shall be distributed as provided in the judgment or award resolving the specific performance claim or shall be applied as provided in Section 2.4 of this Agreement. Seller may seek specific performance or Damages in the alternative.

(b)           If this Agreement terminates for reasons other than those set forth in Section 10.3 (a), Seller shall deliver the Deposit to Purchaser, free of any claims by Seller or any other person with respect thereto, and Purchaser shall have no further liability hereunder of any nature whatsoever to Seller, including any liability for Damages (except for the provisions of Sections 6.5, 7.7 and 12.4 and of the Confidentiality Agreement which shall continue in full force and effect).

(c)           Notwithstanding anything to the contrary in this Agreement, Purchaser shall not be entitled to receive interest on the Deposit, whether the Deposit is applied against the Purchase Price or returned to Purchaser pursuant to this Section 10.3.

ARTICLE 11

POST-CLOSING OBLIGATIONS; INDEMNIFICATION;

LIMITATIONS; DISCLAIMERS AND WAIVERS

Section 11.1         Receipts.

Except as otherwise provided in this Agreement, any production from or attributable to the Assets (and all products and proceeds attributable thereto) and any other income, proceeds, receipts and credits attributable to the Assets which are not reflected in the adjustments to the Purchase Price following the final adjustment pursuant to Section 9.4(b) shall be treated as follows: (a) all production from or attributable to the Assets (and all products and proceeds attributable thereto) and all other income, proceeds, receipts and credits earned with respect to the Assets to which Purchaser is entitled under Section 1.4 shall be the sole property and entitlement of Purchaser, and, to the extent received by Seller, Seller shall fully disclose, account for and remit the same to Purchaser within ten (10) days, and (b) all production from or attributable to the Assets (and all products and proceeds attributable thereto) and all other income, proceeds, receipts and credits earned with respect to the Assets to which Seller is entitled under Section 1.4 shall be the sole property and entitlement of Seller and, to the extent received by Purchaser, Purchaser shall fully disclose, account for and remit the same to Seller within ten (10) days.

Section 11.2         INTENTIONALLY DELETED

Section 11.3         Assumption and Indemnification.

(a)   Without limiting Purchaser’s rights to indemnity under this Article 11, on the Closing Date Purchaser shall assume and hereby agrees to fulfill, perform, pay and discharge (or cause to be fulfilled, performed, paid or discharged) all of the obligations and liabilities of Seller, 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 to furnish makeup gas according to the terms of applicable gas sales, gathering or transportation

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contracts, gas balancing obligations, obligations to pay working interests, royalties, overriding royalties and other interests held in suspense and obligations to plug wells and dismantle structures, and to restore and/or remediate the Assets in accordance with applicable agreements and Laws (all of said obligations and liabilities, subject to the exclusions below, herein being referred to as the “Assumed Seller Obligations”); provided, however, that Assumed Seller Obligations do not include and Purchaser does not assume any obligations or liabilities of Seller to the extent that they are:

(i)            attributable to or arise out of the Excluded Assets;

(ii)           attributable to or arise out of the actions, suits or proceedings, if any, set forth on part (a) of Schedule 5.7;

(iii)          the continuing responsibility of the Seller for which Seller is required to indemnify Purchaser under this Article 11;

(iv)          caused by or arising out of or resulting from Seller’s breach of any of Seller’s covenants or agreements that survive the Closing; or

(v)           caused by or arising out of or resulting from any breach of any representation or warranty made by Seller contained in Article 5 of this Agreement or in the certificate delivered by Purchaser at the Closing pursuant to Section 9.2 (d), but excepting in each case Damages against which Purchaser would be required to indemnify Seller under Section 11.3 (b) at the time the claim notice is presented by Seller.

(b)   Purchaser shall indemnify, defend and hold harmless Seller Indemnitees from and against all Damages incurred or suffered by Seller Indemnitees:

(i)            caused by or arising out of or resulting from the Assumed Seller Obligations;

(ii)           caused by or arising out of or resulting from the ownership, use or operation of the Assets after the Effective Time;

(iii)          caused by or arising out of or resulting from Purchaser’s breach of any of Purchaser’s covenants or agreements that survive the Closing;

(iv)          caused by or arising out of or resulting from any breach of any representation or warranty made by Purchaser contained in Article 6 of this Agreement or in the certificate delivered by Purchaser at Closing pursuant to Section 9.3(d), but excepting in each case Damages against which Seller would be required to indemnify Purchaser under Section 11.3(c) at the time the claim notice is presented by Purchaser; or

(v)           caused by or arising out of or resulting from any claims or actions asserted by Persons (including without limitation Governmental Bodies) with respect to any violation by any Asset or the operations conducted on such Asset of any Environmental Law or any remediation required for such Asset under any Environmental Law regardless whether known, unknown, whether attributable to periods of time before or after the Effective Time EVEN IF SUCH DAMAGES

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ARE CAUSED IN WHOLE OR IN PART BY THE NEGLIGENCE (WHETHER SOLE, JOINT OR CONCURRENT), STRICT LIABILITY OR OTHER LEGAL FAULT OF SELLER INDEMNITEES OR ANY INDEMNIFIED PERSON.

(c)  Seller shall indemnify, defend and hold harmless Purchaser against and from all Damages incurred or suffered by Purchaser caused by or arising out of or resulting from those obligations and liabilities described in Sections 11.3(a)(i) through 11.3(a)(iv).

 (d)  Notwithstanding anything to the contrary contained in this Agreement, this Section 11.3 contains the parties’ exclusive remedy against each other with respect to breaches of the representations and warranties contained in Articles 5, 6, the covenants and agreements that survive the Closing pursuant to the terms of this Agreement and the affirmations of such representations, warranties, covenants and agreements contained in the certificate delivered by each party at Closing pursuant to Sections 9.2(d) or 9.3(d), as applicable. Except for the remedies contained in this Section 11.3, and any other remedies available to the parties at law or in equity for breaches of provisions of this Agreement other than representations and warranties contained in Articles 5, 6, the covenants and agreements that survive the Closing pursuant to the terms of this Agreement and the affirmations of such representations, warranties, covenants and agreements contained in the certificate delivered by each party at Closing pursuant to Sections 9.2(d) or 9.3(d), as applicable, Seller and Purchaser each release, remise and forever discharge the other and its Affiliates and all such parties’ stockholders, unitholders, members, officers, directors, employees, agents, advisors and representatives from any and all suits, legal or administrative proceedings, claims, demands, damages, losses, costs, liabilities, interest, or causes of action whatsoever, 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 this Agreement, Seller’s ownership, use or operation of the Assets, or the condition, quality, status or nature of the Assets, including, without limitation, rights to contribution under the Comprehensive Environmental Response, Compensation, and Liability Act of 1980, as amended, breaches of statutory or implied warranties, nuisance or other tort actions, rights to punitive damages and common law rights of contribution, rights under agreements between Seller and any Persons who are Affiliates of Seller, and rights under insurance maintained by Seller or any Person who is an Affiliate of Seller, EVEN IF CAUSED IN WHOLE OR IN PART BY THE NEGLIGENCE (WHETHER SOLE, JOINT OR CONCURRENT, BUT EXCLUDING GROSS NEGLIGENCE OR WILLFUL MISCONDUCT), STRICT LIABILITY OR OTHER LEGAL FAULT OF ANY RELEASED PERSON, excluding, however, any existing contractual rights between (i) Purchaser or any of Purchaser’s Affiliates and (ii) Seller or any of Seller’s Affiliates under contracts between them relating to the Assets.

(e)  Claims for Property Costs shall be exclusively handled pursuant to the Purchase Price adjustments in Section 2.2, and shall not be subject to indemnification under this Section 11.3.

(f)  “Damages”, for purposes of this Article 11, shall mean the amount of any actual liability, loss, cost, diminution in value, expense, claim, demand, notice of violation, investigation by any Governmental Body, administrative proceeding, payment, charge, obligation, fine, penalty, deficiency, award or judgment incurred or suffered by any Indemnified Party arising out of or resulting from the indemnified matter, including reasonable fees and expenses of attorneys, consultants, accountants or other agents and experts reasonably incident to matters indemnified against, and the costs of investigation and/or monitoring of such matters, and the costs of enforcement of the indemnity; provided, however, that Purchaser and Seller shall not be entitled to indemnification under this Section 11.3 for, and “Damages” shall not include, (i)

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loss of profits or other consequential damages suffered by the party claiming indemnification, or any punitive damages, (ii) any liability, loss, cost, expense, claim, award or judgment that does not individually exceed $100,000, and (iii) any liability, loss, cost, expense, claim, award or judgment to the extent resulting from or increased by the actions or omissions of any Indemnified Party after the Effective Time.

(g)  The indemnity of each party provided in this Section 11.3 shall extend to each party’s present and former Affiliates, successors and permitted assigns, and its and their stockholders, unitholders, members, directors, officers, employees, agents and representatives; provided however any claim for indemnity can only be asserted by Purchaser or Seller.

Section 11.4         Indemnification Actions.

All claims for indemnification under Section 11.3 shall be asserted and resolved as follows:

(a)           For purposes of this Article 11, the term “Indemnifying Party” when used in connection with particular Damages shall mean the party or parties having an obligation to indemnify another party or parties with respect to such Damages pursuant to this Article 11, and the term “Indemnified Party” when used in connection with particular Damages shall mean the party or parties having the right to be indemnified with respect to such Damages by another party or parties pursuant to this Article 11.

(b)           To make claim for indemnification under Article 11, an Indemnified Party shall notify the Indemnifying Party of its claim under this Section 11.4, 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 “Claim”), the Indemnified Party shall provide its Claim Notice promptly after the Indemnified Party has actual knowledge of the Claim and shall enclose a copy of all papers (if any) served with respect to the Claim; provided that the failure of any Indemnified Party to give notice of a Claim as provided in this Section 11.4 shall not relieve the Indemnifying Party of its obligations under Section 11.3 except to the extent such failure results in insufficient time being available to permit the Indemnifying Party to effectively defend against the Claim or otherwise 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 which was inaccurate or breached.

(c)           In the case of a claim for indemnification based upon a Claim, the Indemnifying Party shall have fourteen (14) 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 Claim at the sole cost and expense of the Indemnifying Party. The Indemnified Party is authorized, prior to and during such fourteen (14)-day period, 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.  The failure to provide notice to the Indemnified Party shall be deemed to be acceptance of liability.

(d)           If the Indemnifying Party admits its liability, it shall have the right and obligation to diligently defend, at its sole cost and expense, the Claim. 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

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any Claim which the Indemnifying Party elects to contest. The Indemnified Party may participate in, but not control, any defense or settlement of any Claim controlled by the Indemnifying Party pursuant to this Section 11.4(d). An Indemnifying Party shall not, without the written consent of the Indemnified Party, (i) settle any Claim or consent to the entry of any judgment with respect thereto which does not include an unconditional written release of the Indemnified Party from all liability in respect of such Claim or (ii) settle any Claim or consent to the entry of any judgment with respect thereto in any manner that may materially and adversely affect the Indemnified Party (other than as a result of money damages covered by the indemnity).

(e)           If the Indemnifying Party does not admit its liability or admits its liability but fails to diligently prosecute or settle the Claim, then the Indemnified Party shall have the right to defend against the 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 liability and assume the defense of the Claim at any time prior to settlement or final determination thereof. If the Indemnifying Party has not yet admitted its liability for a 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 days following receipt of such notice to (i) admit in writing its liability for the Claim and (ii) if liability is so admitted, reject, in its reasonable judgment, the proposed settlement.

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

Section 11.5         Limitation on Actions.

(a)   Except as provided herein, the representations and warranties of the parties in Articles 5 and 6 terminate on the 180th day after the Closing Date (including both the Closing Date and such 180th day in the calculation of the 180 days).  The representations and warranties of Seller in Sections 5.22, 5.23, 5.24, 5.25 and 5.26 terminate on the Closing Date.  The representations of Purchaser in Section 6.8 shall survive the Closing indefinitely.

The following covenants and agreements of Seller shall survive the Closing for a period of ninety (90) days: Sections 1.5(a), 7.4(c), and 7.9.  The following covenants and agreements of Seller shall survive the Closing for a period of two (2) years: Sections 1.4(b) (penultimate sentence), 2.3 (penultimate sentence), 3.5(a) (third and last sentences), 7.10, 7.11, 9.4(b), 11.1, and 12.4.  The covenants and agreements of Seller in Section 7.12(c) and (d) shall survive the Closing for period of three (3) years.  The covenants and agreements of Seller in Section 1.6(b) shall survive the Closing until performed as provided in Exhibit D. The following covenants and agreements of Seller shall survive the Closing until expiration of the applicable statute of limitations: Section 12.10.

The following covenants and agreements of Purchaser shall survive the Closing for a period of ninety (90) days: Sections 7.4(c) and 7.9.  The following covenants and agreements of Purchaser shall survive the Closing for a period of two (2) years: Sections 1.4(b) (penultimate sentence), 2.3 (penultimate sentence), 3.4(i), 3.5(a) (last sentence), 7.1, 7.7, 7.10, 7.11, 9.4(b), 11.1, and 12.4.  The covenants and agreements of Purchaser under Section 1.5(b) shall survive the Closing for a period of seven (7) years.  The covenants and agreements of Purchaser in

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Section 1.6(b) shall survive the Closing until performed as provided in Exhibit D. The following covenants and agreements of Purchaser shall survive the Closing until expiration of the applicable statute of limitations: Sections 4.5, 7.12(d), 11.6, 11.7, 11.8, 11.9 and 12.10.

The affirmations of representations, warranties, covenants and agreements contained in the certificate delivered by each party at Closing pursuant to Sections 9.2(d) or 9.3(d), as applicable, shall survive the Closing as to each representation, warranty covenant and agreement so affirmed for the same period of time that the specific representation, warranty, covenant or agreement survives the Closing pursuant to this Section 10.5.

The remainder of the representations, warranties, covenants and agreements provided for in this Agreement shall terminate upon Closing except as may otherwise be expressly provided herein. 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 or termination date.

(b)   The indemnities in Sections 11.3(b)(iii) and 11.3(b)(iv) shall terminate as of the termination date of each respective representation, warranty, covenant or agreement that is subject to indemnification, except in each case as to matters for which a specific written claim for indemnity has been delivered to the Indemnifying Party on or before such termination date.  Purchaser’s indemnities in Sections 11.3(b)(i), 11.3(b)(ii) and 11.3(b)(v) shall continue without time limit.  The indemnities in Sections 11.3(a)(iv) and 11.3(a)(v) shall terminate as of the termination date of each respective representation, warranty, covenant or agreement that is subject to indemnification, except in each case as to matters for which a specific written claim for indemnity has been delivered to the Indemnifying Party on or before such termination date.  Seller’s indemnities in Sections 11.3(a)(i), 11.3(a)(ii) and 11.3(a)(iii) shall continue without time limit.

(c)  Seller shall not have any liability for any indemnification under Section 11.3 (except under Section 11.3(c)) until and unless the aggregate amount of the liability for all Damages for which claim notices are delivered by Purchaser exceeds Eighteen Million and No/100 Dollars ($18,000,000.00).  The adjustments to the Purchase Price under Section 2.2 and any payments in respect thereof shall not be limited by this Section.

(d)  Notwithstanding anything to the contrary contained elsewhere in this Agreement, Seller shall not be required to indemnify Purchaser for aggregate Damages in excess of ten percent (10%) of the Adjusted Purchase Price.

Section 11.6         Recording.

As soon as practicable after Closing, Purchaser shall record the Conveyances in the appropriate counties as well as the appropriate governmental agencies and provide Seller with copies of all recorded or approved instruments.

Section 11.7         Independent Investigation.

Purchaser represents and acknowledges that it is knowledgeable of the oil and gas business and of the usual and customary practices of producers such as Seller and that it has had access to the Assets, the officers and employees of Seller, and the books, records and files of

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Seller relating to the Assets and in making the decision to enter into this Agreement and consummate the transactions contemplated hereby, Purchaser has relied solely on the basis of its own independent due diligence investigation of the Assets.  Accordingly, Purchaser acknowledges that Seller has not made, and Seller hereby expressly disclaims and negates any representation or warranty (other than those express representations and warranties made in Article 5), express, implied, at common law, by statute or otherwise, relating to the Assets.

Section 11.8         Disclaimer Regarding Information.

Seller hereby expressly negates and disclaims, and Purchaser hereby waives and acknowledges that Seller has not made, any covenant, representation or warranty, statutory, express or implied, relating to (a) the accuracy, completeness or materiality of any information, data or other materials (written or oral) now, heretofore, or hereafter furnished to Purchaser by or on behalf of Seller or (b) production rates, recompletion opportunities, decline rates, geological or geophysical data or interpretations, the quality, quantity, recoverability or cost of recovery of any Hydrocarbon reserves, any product pricing assumptions, or the ability to sell or market any Hydrocarbons after Closing.

Section 11.9         Waiver of Trade Practices Acts.

(a)           It is the intention of the parties that Purchaser’s rights and remedies with respect to this transaction and with respect to all acts or practices of Seller, past, present or future, in connection with this transaction shall be governed by legal principles other than the Texas Deceptive Trade Practices—Consumer Protection Act, Tex. Bus. & Com. Code Ann. § 17.41 et seq. (the “DTPA”).  As such, Purchaser hereby waives the applicability of the DTPA to this transaction and any and all duties, rights or remedies that might be imposed by the DTPA, whether such duties, rights and remedies are applied directly by the DTPA itself or indirectly in connection with other statutes; provided, however, Purchaser does not waive § 17.555 of the DTPA.  Purchaser acknowledges, represents and warrants that it is purchasing the goods and/or services covered by this Agreement for commercial or business use; that it has assets of $5 million or more according to its most recent financial statement prepared in accordance with generally accepted accounting principles; that it has knowledge and experience in financial and business matters that enable it to evaluate the merits and risks of a transaction such as this; and that it is not in a significantly disparate bargaining position with Seller.

(b)         Purchaser expressly recognizes that the price for which Seller has agreed to perform its obligations under this Agreement has been predicated upon the inapplicability of the DTPA and this waiver of the DTPA.  Purchaser further recognizes that Seller, in determining to proceed with the entering into of this Agreement, has expressly relied on this waiver and the inapplicability of the DTPA.

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ARTICLE 12

MISCELLANEOUS

Section 12.1         Counterparts.

This Agreement may be executed in counterparts, each of which shall be deemed an original instrument, but all such counterparts together shall constitute but one agreement.

Section 12.2         Notice.

All notices which are required or may be given pursuant to this Agreement shall be sufficient in all respects if given in writing and delivered personally, by telecopy or by registered or certified mail, postage prepaid, as follows:

Either Party may change its address for notice by notice to the other in the manner set forth above.  All notices shall be deemed to have been duly given at the time of receipt by the party to which such notice is addressed.

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Section 12.3         Sales or Use Tax Recording Fees and Similar Taxes and Fees.

Purchaser shall bear any sales, use, excise, real property transfer or gain, gross receipts, goods and services, registration, capital, documentary, stamp or transfer Taxes, recording fees and similar Taxes and fees incurred and imposed upon, or with respect to, the property transfers or other transactions contemplated hereby. Seller will determine, and Purchaser agrees to cooperate with Seller in determining, sales tax, if any, that is due in connection with the sale of Assets and Purchaser agrees to pay any such tax to Seller at Closing. If such transfers or transactions are exempt from any such taxes or fees upon the filing of an appropriate certificate or other evidence of exemption, Purchaser will timely furnish to Seller such certificate or evidence.

Section 12.4         Expenses.

Except as provided in Section 12.3, all expenses incurred by Seller in connection with or related to the authorization, preparation or execution of this Agreement, the conveyances delivered hereunder and the Exhibits and Schedules hereto and thereto, and all other matters related to the Closing, including without limitation, all fees and expenses of counsel, accountants and financial advisers employed by Seller, shall be borne solely and entirely by Seller, and all such expenses incurred by Purchaser shall be borne solely and entirely by Purchaser.

Section 12.5         Change of Name.

Unless otherwise authorized by Seller in writing, as promptly as practicable, but in any case within thirty (30) days after the Closing Date, Purchaser shall eliminate the names “Cavallo Energy LP”, “Stallion Energy LLC”, “Cavallo Gathering Company LLC” and any variants thereof from the Assets acquired pursuant to this Agreement and, except with respect to such grace period for eliminating existing usage, shall have no right to use any logos, trademarks or trade names belonging to Seller or any of its Affiliates.

Section 12.6         Replacement of Bonds, Letters of Credit and Guarantees

The parties understand that none of the bonds, letters of credit and guarantees, if any, posted by Seller with Governmental Bodies and relating to the Assets may be transferable to Purchaser.  Promptly following Closing, Purchaser shall obtain, or cause to be obtained in the name of Purchaser, replacements for such bonds, letters of credit and guarantees, to the extent such replacements are necessary to permit the cancellation of the bonds, letters of credit and guarantees posted by Seller or to consummate the transactions contemplated by this Agreement.

Section 12.7         Governing Law.

This Agreement and the legal relations between the parties shall be governed by and construed in accordance with the laws of the State of Texas without regard to principles of conflicts of laws otherwise applicable to such determinations.  The venue for any action brought under this Agreement shall be Harris County, Texas.

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Section 12.8         Captions.

The captions in this Agreement are for convenience only and shall not be considered a part of or affect the construction or interpretation of any provision of this Agreement. 

Section 12.9         Waivers.

Any failure by any party or parties to comply with any of its or their obligations, agreements or conditions herein contained may be waived in writing, but not in any other manner, by the party or parties to whom such compliance is owed. No waiver of, or consent to a change in, any of the provisions of this Agreement shall be deemed or shall constitute a waiver of, or consent to a change in, other provisions hereof (whether or not similar), nor shall such waiver constitute a continuing waiver unless otherwise expressly provided.

Section 12.10       Assignment.

No party shall assign all or any part of this Agreement, nor shall any party assign or delegate any of its rights or duties hereunder, without the prior written consent of the other party and any assignment or delegation made without such consent shall be void; provided, however, at Closing, Purchaser may designate Linn Energy Mid-Continent Holdings, LLC to acquire title to the Assets, provided further that such designation shall not discharge or relieve Purchaser of any of its obligations under this Agreement.  This Agreement shall be binding upon and inure to the benefit of the parties hereto and their respective permitted successors and assigns.

Section 12.11       Entire Agreement.

The Confidentiality Agreement, this Agreement and the documents to be executed hereunder and the Exhibits and Schedules attached hereto constitute the entire agreement between 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 hereof.  In the event of a conflict between the Confidentiality Agreement and this Agreement, the terms and provisions of this Agreement shall prevail.

Section 12.12       Amendment.

(a)  This Agreement may be amended or modified only by an agreement in writing executed by both parties.

(b)  No waiver of any right under this Agreement shall be binding unless executed in writing by the party to be bound thereby.

Section 12.13       No Third-Party Beneficiaries.

Nothing in this Agreement shall entitle any Person other than Purchaser and Seller to any claims, cause of action, remedy or right of any kind, except the rights expressly provided to the Persons described in Section 11.3(g).

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Section 12.14       References.

In this Agreement:

(a)           References to any gender includes a reference to all other genders;

(b)           References to the singular includes the plural, and vice versa;

(c)           Reference to any Article or Section means an Article or Section of this Agreement;

(d)           Reference to any Exhibit or Schedule means an Exhibit or Schedule to this Agreement, all of which are incorporated into and made a part of this Agreement;

(e)  Unless expressly provided to the contrary, “hereunder”, “hereof’, “herein” and words of similar import are references to this Agreement as a whole and not any particular Section or other provision of this Agreement; and

(f)            “Include” and “including” shall mean include or including without limiting the generality of the description preceding such term.

Section 12.15       Construction.

Purchaser is a party capable of making such investigation, inspection, review and evaluation of the Assets as a prudent purchaser would deem appropriate under the circumstances including with respect to all matters relating to the Assets, their value, operation and suitability. Each of Seller and Purchaser has had substantial input into the drafting and preparation of this Agreement and has had the opportunity to exercise business discretion in relation to the negotiation of the details of the transaction contemplated hereby. This Agreement is the result of arm’s-length negotiations from equal bargaining positions.

Section 12.16       Limitation on Damages.

Notwithstanding anything to the contrary contained herein, none of Purchaser, Seller or any of their respective Affiliates shall be entitled to either punitive or consequential damages in connection with this Agreement and the transactions contemplated hereby and each of Purchaser and Seller, for itself and on behalf of its Affiliates, hereby expressly waives any right to punitive or consequential damages in connection with this Agreement and the transactions contemplated hereby, except to the extent an Indemnified Party is required to pay punitive or consequential damages to a third party that is not an Indemnified Party.

ARTICLE 13

DEFINITIONS

 “Adjusted Purchase Price” shall mean the Purchase Price after calculating and applying the adjustments set forth in Section 2.2.

“Adjustment Period” has the meaning set forth in Section 2.2(a).

“AFE” means authority for expenditure.

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“Affiliates” with respect to any Person, means any person that directly or indirectly controls, is controlled by or is under common control with such Person.

“Agreed Interest Rate” shall mean simple interest computed at the rate of the prime interest rate as published in the Wall Street Journal.

 “Agreement” has the meaning set forth in the first paragraph of this Agreement.

“Allocated Value” has the meaning set forth in Section 2.3.

“Assessment” has the meaning set forth in Section 4.1.

“Assets” has the meaning set forth in Section 1.2.

“Assumed Seller Obligations” has the meaning set forth in Section 11.3(a).

“Benefit Plans” has the meaning set forth in Section 5.20.

“Business Day” means each calendar day except Saturdays, Sundays, and Federal holidays.

“Claim” has the meaning set forth in Section 11.4.

“Claim Notice” has the meaning set forth in Section 11.4.

“Closing” has the meaning set forth in Section 9.1(a).

“Closing Date” has the meaning set forth in Section 9.1(b).

“Closing Payment” has the meaning set forth in Section 9.4(a).

“Code” has the meaning set forth in Section 2.3.

“Confidentiality Agreement” has the meaning set forth in Section 7.1(a).

“Contracts” has the meaning set forth in Section 1.2(d).

“Conveyance” has the meaning set forth in Section 3.1(b).

“Cure Period” has the meaning set forth in Section 3.4(c).

“Damages” has the meaning set forth in Section 11.3(f).

“Defensible Title” has the meaning set forth in Section 3.2.

“DTPA” has the meaning set forth in Section 11.9.

“Effective Time” has the meaning set forth in Section 1.4.

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“Environmental Claim” shall mean, as of the Effective Time, any action or proceeding before any Governmental Body, or written notice to Seller by any Person, alleging potential liability arising out of or resulting from any actual or alleged violation of, or any remedial obligation under, any Environmental Law with respect to the Properties.

“Environmental Claim Date” has the meaning set forth in Section 4.2.

“Environmental Deductible” has the meaning set forth in Section 4.3.

“Environmental Consultant” has the meaning set forth in Section 4.1.

“Environmental Defect Notice” has the meaning set forth in Section 4.2

“Environmental Laws” means, as the same have been amended as of the Effective Time, the Comprehensive Environmental Response, Compensation and Liability Act, 42 U.S.C. § 9601 et seq. (“CERCLA”); the Resource Conservation and Recovery Act, 42 U.S.C. § 6901 et seq. (“RCRA”); the Federal Water Pollution Control Act, 33 U.S.C. § 1251 et seq. (the “Clean Water Act”); the Clean Air Act, 42 U.S.C. § 7401 et seq. the Hazardous Materials Transportation Act, 49 U.S.C. § 1471 et seq.; the Toxic Substances Control Act, 15 U.S.C. §§ 2601 through 2629 (“TSCA”); the Oil Pollution Act, 33 U.S.C. § 2701 et seq.; the Emergency Planning and Community Right-to-Know Act, 42 U.S.C. § 11001 et seq.; and the Safe Drinking Water Act, 42 U.S.C. §§ 300f through 300j; and all similar Laws as of the Effective Time of any Governmental Body having jurisdiction over the property in question addressing pollution or protection of the environment and all regulations implementing the foregoing, including but not limited to the Texas Railroad Commission and all other Texas governmental subdivisions with authority over environmental matters.

“Environmental Liabilities” shall mean any and all environmental response costs (including costs of remediation), damages, natural resource damages, settlements, consulting fees, expenses, penalties, fines, orphan share, prejudgment and post-judgment interest, court costs, attorneys’ fees, and other liabilities incurred or imposed (i) pursuant to any order, notice of responsibility, directive (including requirements embodied in Environmental Laws), injunction, judgment or similar act (including settlements) by any Governmental Body to the extent arising out of any violation of, or remedial obligation under, any Environmental Law which is attributable to the ownership or operation of the Properties prior to the Effective Time or (ii) pursuant to any claim or cause of action by a Governmental Body or other Person for personal injury, property damage, damage to natural resources, remediation or response costs to the extent arising out of any violation of, or any remediation obligation under, any Environmental Law which is attributable to the ownership or operation of the Properties prior to the Effective Time .

“Equipment” has the meaning set forth in Section 1.2(f).

“ERISA”means the Employee Retirement Income Security Act of 1974, as amended.