PURCHASE AND SALE AGREEMENT

Oklahoma Properties

PURCHASE AND SALE AGREEMENT

BY AND BETWEEN

SOUTHWESTERN ENERGY PRODUCTION COMPANY

AS SELLER

AND

DUTCH PETROLEUM, LLC

AS BUYER

INDEX

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EXHIBITS AND SCHEDULES

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PURCHASE AND SALE AGREEMENT

     THIS PURCHASE AND SALE AGREEMENT (this “Agreement”) is dated November 5, 2002, by and between SOUTHWESTERN ENERGY PRODUCTION COMPANY, an Arkansas corporation, with an office at 2350 N. Sam Houston Parkway East, Suite 300, Houston, Texas 77032 (hereinafter referred to as “Seller”) and DUTCH PETROLEUM, LLC, an Oklahoma limited liability company, with an office at 2110 Bank One Center, 100 North Broadway, Oklahoma City, Oklahoma 73102 (hereinafter referred to as “Buyer”), and is based on the following premises:

     WHEREAS, Seller desires to sell, assign and convey to Buyer and Buyer desires to purchase and accept certain oil and gas properties and related interests; and

     WHEREAS, the parties have reached agreement regarding such sale and purchase.

     NOW, THEREFORE, for valuable consideration and the mutual covenants and agreements herein contained, Seller and Buyer agree as follows:

ARTICLE 1. DEFINITIONS

     1.     Definitions: In this Agreement, capitalized terms have the meanings provided in this Article 1, unless expressly provided otherwise in other Articles. All defined terms include both the singular and the plural. All references to Articles or Sections refer to Articles or Sections in this Agreement, and all references to Exhibits and Schedules refer to the Exhibits and Schedules attached to this Agreement. The Exhibits and Schedules which are attached hereto are incorporated in and made a part of this Agreement.

     “Accounting Referee” has the meaning set forth in Section 6.8.

     “Affiliate” means and includes any entity that, directly or indirectly, through one or more intermediaries, controls or is controlled by or is under common control with the entity specified.

     “Alleged Title Defect” means a Title Defect (as hereinafter defined) which is asserted by Buyer in accordance with Section 4.2.

     “Assignment and Bill of Sale” means a document in the form of Exhibit B.

     “Assumed Contracts” means all operating agreements, unit agreements, unit operating agreements, exploration agreements, farmout agreements, farm-in agreements, Hydrocarbon sales, purchase, gathering, transportation, treating, marketing, exchange, processing and fractionating agreements, surface leases, and other contracts and agreements respecting the

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Properties that are either of record in the counties/parishes where the Properties are located or are reflected or referenced in Seller’s files.

     “Business Day” means a Day (as hereinafter defined) excluding Saturdays, Sundays and U.S. legal holidays.

     “Casualty Loss” means any loss, damage or reduction in value resulting from mechanical failure or defects, catastrophic occurrences, acts of God and any other losses which are not the result of normal wear and tear or of natural reservoir changes.

     “Certificate” means a document in the form of Exhibit C.

     “Claim” means any and all claims, demands, suits, causes of action, investigations, administrative proceedings, or other legal proceedings, losses, damages, liabilities, judgments, assessments, settlements, fines, notices of violation, penalties, interest, obligations and costs (including attorneys’ fees and costs of litigation) of any kind or character (whether or not asserted prior to the date hereof, and whether known or unknown, fixed or unfixed, conditional or unconditional, based on negligence, strict liability or otherwise, choate or inchoate, liquidated or unliquidated, secured or unsecured, accrued, absolute, contingent or otherwise) which are brought by or owed to a Third Party (as hereinafter defined).

     “Close” or “Closing” means the consummation of the transfer of title to the Properties to Buyer, including execution and delivery of all documents provided herein.

     “Closing Date” means November 15, 2002, or such other date as may be mutually agreed upon by the parties on which Closing occurs in accordance with the terms of this Agreement; provided, however, Buyer shall have the right, at its option, to extend the date of Closing from November 15, 2002 to November 22, 2002 upon the delivery of written notice thereof to Seller no later than November 11, 2002.

     “Day” means a calendar day consisting of twenty-four (24) hours from midnight to midnight.

     “Defensible Title” means, as to the Leases, such title held by Seller that, subject to and except for the Permitted Encumbrances (as hereinafter defined):

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     “Earnest Money Deposit” has the meaning set forth in Section 3.2.

     “Effective Time” means October 1, 2002, at 7:00 a.m., local time where the Properties are located.

     “Environmental Claims” means all Claims for pollution or environmental damages of any kind, including without limitation, those relating to: (a) remediation and/or clean-up thereof, (b) damage to and/or loss of any property or resource, and/or (c) injury or death of any person(s) whomsoever, including without limitation Claims relating to breach of Environmental Laws, common law causes of action such as negligence, gross negligence, strict liability, nuisance or trespass, or fault imposed by statute, rule, regulation or otherwise (but specifically excluding any Claims relating to asbestos or NORM (as hereinafter defined), which are covered by Section 8.4 hereof), and including all costs associated with remediation and clean up, and fines and penalties associated with any of the foregoing.

     “Environmental Defect” has the meaning set forth in Section 5.2.2.

     “Environmental Inspection Period” has the meaning set forth in Section 5.2.2.

     “Environmental Laws” means all laws, statutes, ordinances, permits, orders, judgments, rules or regulations which are promulgated, issued or enacted by a governmental entity having appropriate jurisdiction that, (a) relate to the prevention of pollution or environmental damage, (b) the remediation of pollution or environmental damage, or (c) the protection of the environment generally; including without limitation, the Clean Air Act, as amended, the Clean Water Act, as amended, the Comprehensive Environmental Response, Compensation and Liability Act of 1980, as amended, the Federal Water Pollution Control Act, as amended, the Resource Conservation and Recovery Act of 1976, as amended, the Safe Drinking Water Act, as amended, the Toxic Substance and Control Act, as amended, the Superfund Amendments and Reauthorization Act of 1986, as amended, the Hazardous and the Solid Waste Amendments Act of 1984, as amended, and the Oil Pollution Act of 1990, as amended.

     “Final Accounting Settlement” has the meaning set forth in Section 6.6.

     “Final Settlement Date” has the meaning set forth in Section 6.6.

     “Hydrocarbons” has the meaning given to such term in the definition of Properties.

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     “Interest Adjustment” has the meaning set forth in Section 4.2.

     “Laws” means any and all applicable laws, statutes, ordinances, permits, decrees, orders, judgments, rules or regulations (including, without limitation, Environmental Laws) which are promulgated, issued or enacted by a governmental entity having appropriate jurisdiction.

     “Leases” has the meaning given to such term in the definition of Properties.

     “Material Contracts” shall mean those Assumed Contracts identified on Exhibit K.

     “Non-Foreign Affidavit” means a document in the form of Exhibit D.

     “NORM” means naturally occurring radioactive materials.

     “Permitted Encumbrances” means:

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     “Properties” means the following properties (real, personal or mixed) and rights (contractual or otherwise):

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Seller EXCEPTS, RESERVES AND RETAINS unto itself, its successors and assigns, and specifically excludes from the Properties, those properties (real, personal or mixed) and rights (contractual or otherwise) more particularly described on Exhibit J attached hereto.

     “Purchase Price” has the meaning set forth in Section 3.1.

     “Records” means all of Seller’s books, records and files related to the Properties, including all (i) abstracts, title opinions, title reports, environmental site assessments, environmental compliance reports, lease and land files, surveys, analyses, compilations, correspondence, filings with and reports to regulatory agencies and other documents, contracts, agreements and instruments that in any manner relate to the Properties, (ii) computer databases that are owned by or licensed to Seller that relate to the Properties, (iii) geophysical, geological, engineering, exploration, production and other technical data, magnetic field recordings, digital processing tapes, field prints, summaries, reports and maps, whether written or in electronically reproducible form, that are in the possession of Seller and relate to the Properties and (iv) all other books, records, files and magnetic tapes containing title or other information that are in the possession of Seller and relate to the Properties (the “Data”), but specifically excluding (i) previous offers and economic analyses associated with the acquisition, sale or exchange of the Properties, (ii) interpretive information, (iii) personnel information, (iv) corporate, legal, financial and tax information, (v) information covered by a non-disclosure obligation, (vi) information covered by a legal privilege and (vii) any other Data or information that Seller does not have the right to assign to Buyer.

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     “Title Defect” means any lien, encumbrance, encroachment or defect associated with Seller’s title to the Properties that would cause Seller not to have Defensible Title.

     “Third Party” means any person or entity, governmental or otherwise, other than Seller and Buyer.

ARTICLE 2. SALE AND PURCHASE

     On the Closing Date, effective as of the Effective Time, and upon the terms and conditions herein set forth, Seller agrees to sell and assign the Properties to Buyer and Buyer agrees to buy and accept the Properties.

ARTICLE 3. PURCHASE PRICE

     3.1       Purchase Price. Subject to adjustments as set forth herein, the total purchase price for the Properties shall be Twenty-Six Million Eight Hundred Fifty Thousand Dollars (US $26,850,000) (the “Purchase Price”), payable in full at Closing in immediately available funds.

     3.2       Earnest Money Deposit. Upon the execution of this Agreement, Buyer shall pay to Seller a deposit in the amount of One Million Five Hundred Thousand Dollars (US $1,500,000) (the “Earnest Money Deposit”). If Closing occurs, the Purchase Price shall be credited by the amount of the Earnest Money Deposit. If Closing does not occur, the Earnest Money Deposit shall be refunded to Buyer, unless (a) Closing does not occur because of Buyer’s failure or refusal to Close in breach of this Agreement or (b) because the conditions precedent to Seller’s obligation to Close provided in Section 14.1 are unmet at the time set for Closing, in which case Seller shall retain the Earnest Money Deposit as liquidated damages and not as a penalty. If, however, in the case of either (a) or (b) above, any conditions precedent to Buyer’s obligation to Close provided in Section 14.2 are unmet at the time set for Closing, Seller shall not be entitled to retain the Earnest Money Deposit as hereinabove provided. In the event that Closing occurs after November 22, 2002, through the fault of Buyer, interest shall be payable on the Purchase Price from November 22, 2002 through and including the Closing Date at the rate of ten percent (10%) per annum.

     3.3       Allocation. Attached hereto as Exhibit F is Buyer’s good faith allocation of the Purchase Price which shall be used in providing any required preferential purchase right notifications and in determining any Purchase Price adjustments pursuant to this Agreement.

     3.4       Preferential Rights. If any of the Properties are burdened with preferential purchase rights, the assignment of the Properties subject to such preferential rights shall be conditioned upon Seller obtaining the necessary waiver or expiration of such right, and this Agreement shall not constitute an assignment or attempted assignment thereof without such

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waiver or expiration. If, prior to Closing, (i) a holder of a preferential purchase right notifies Seller that it intends to exercise its rights with respect to any of the Properties to which its preferential purchase right applies, or (ii) the time for exercising any preferential purchase right has not expired and the holder thereof has not waived the same prior to the Closing Date, the Properties covered by said preferential purchase right shall be excluded from the Properties to be conveyed to Buyer at Closing, and the Purchase Price shall be reduced by the value allocated to said Properties by Buyer in accordance with Section 3.3. If (i) the holder of the preferential purchase right fails to consummate the purchase of the Properties that are the subject of any notice of an intent to exercise such right received before or after Closing, (ii) the preferential purchase right expires or (iii) notice of a waiver of the preferential purchase right is received by Seller, Seller shall promptly notify Buyer in writing. Within five (5) Business Days after Buyer’s receipt of such notice or the Closing Date, whichever is later, Seller shall sell to Buyer, and Buyer shall purchase from Seller, such Properties under the terms of this Agreement for a price equal to the aforesaid value allocated to such Properties. Notwithstanding the foregoing, Buyer shall have no obligation to purchase such Properties if Buyer does not receive such notice within sixty (60) Days following Closing.

     3.5       Consents. If any of the Leases require the consent of a Third Party to assign Seller’s interest therein, the assignment of such lease(s) subject to consent requirements shall be conditioned upon Seller obtaining such consent prior to Closing (except for consents from governmental bodies customarily obtained after assignment which shall not be required to be obtained prior to Closing). Seller shall use all reasonable efforts to obtain all such consents. With respect to any leasehold interest for which consent is not obtained prior to Closing, such interest shall not be conveyed to Buyer at Closing and the Purchase Price shall be reduced to account for exclusion of the affected Property. If Seller obtains the required consent(s) within sixty (60) days following Closing, Seller shall sell and Buyer shall purchase the interest(s) affected thereby under the terms of this Agreement for a price equal to the Purchase Price adjustment made therefor at Closing. There shall be no obligations of sale or purchase of the affected interest(s) in the Properties following sixty (60) days after the Closing Date.

ARTICLE 4. REVIEW BY BUYER

     4.1       Review of Records. Seller shall make available to Buyer after execution of this Agreement Records in Seller’s possession relating to the Properties including, without limitation all environmental site assessments and environmental compliance reports in Seller’s possession relating to the Properties which are listed on Exhibit L. Buyer shall be entitled to review said Records during normal business hours or other mutually agreeable time and shall have a right to request a reasonable number of copies of such Records, at Buyer’s expense.

     4.2       Adjustment of Purchase Price for Title Defects. As soon as reasonably practicable after Buyer’s review of the Records in accordance with Section 4.1, but in no event later than five (5) Business Days prior to the Closing Date, Buyer shall notify Seller in writing of any Properties which are subject to Alleged Title Defects and/or whose net revenue interest and/or

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working interest is/are less than or greater than that amount specified on Exhibit A (collectively, the “Interest Adjustments”). Notice of Title Defects or Interest Adjustments shall include a description and full explanation of each Title Defect and Interest Adjustment being claimed and a value which Buyer in good faith attributes to each. With respect to Alleged Title Defects, Seller may undertake to satisfy some, all or none of those raised by Buyer, at Seller’s sole cost and expense. Buyer and Seller shall meet at least three (3) Business Days prior to the Closing Date in an attempt to mutually agree on a resolution with respect to any Alleged Title Defects or Interest Adjustments which by such time have not been agreed between the parties in writing. It is recognized that good faith differences of opinion may exist between Buyer and Seller in connection with Alleged Title Defects or Interest Adjustments, including without limitation, disputes as to (i) whether or not the alleged defect constitutes a Title Defect within the meaning of this Agreement, (ii) whether or not the magnitude of such defect is great enough that Buyer is contractually entitled to assert such Title Defect, (iii) whether or not the Title Defect was properly and timely asserted by Buyer pursuant to this Article, and (iv) the appropriate upward or downward adjustment, if any, to be made to the Purchase Price on account of such Title Defect. In determining whether a portion of a Property contains a Title Defect, it is the intent of the parties to include, when possible, only that portion of the Property adversely affected. If the value properly allocated to a Title Defect cannot be determined directly from Exhibit F because the Title Defect is included within, but does not totally comprise, the Property to which the allocated value relates, Seller and Buyer shall attempt to proportionately reduce the allocated value on Exhibit F. Closing shall not be delayed, postponed or canceled because a resolution of a Title Defect or Interest Adjustment is not agreed prior to the Closing Date, except to the extent that the Alleged Title Defect being asserted is failure of Seller’s title in whole or in part to any portion(s) of the Properties (a “Material Defect”). To the extent that any portion(s) of the Properties are alleged to be affected by a Material Defect which remains on the scheduled Closing Date uncured or otherwise unresolved by the parties, such affected portion(s) of the Properties shall be excluded from the Properties conveyed to Buyer at Closing and the Purchase Price shall be reduced accordingly. If the parties cannot mutually agree on a Purchase Price adjustment for a Material Defect, Buyer shall have the right to (i) proceed to Closing and accept the Property with the Material Defect with no Purchase Price adjustment or (ii) terminate this Agreement as to the Property affected by the Material Defect and receive a Purchase Price adjustment for such Property as set forth on Exhibit F or, where applicable, the proportionate allocated value. If any difference of opinion regarding an Alleged Title Defect (excluding any Material Defect) or Interest Adjustment or value of the Title Defect (excluding any Material Defect) or Interest Adjustment (collectively, the “Title Defect Dispute”) is not resolved by mutual agreement of Buyer and Seller prior to the Closing Date, then either party has the right, exercisable within sixty (60) days after the Closing Date, to refer the same to arbitration in accordance with Article 13, but using one (1) mutually agreeable arbitrator who is an attorney licensed in the state in which the Properties are located and who has at least fifteen (15) years oil and gas title experience in such state. Subject to the terms of Article 13, the decision of the arbitrator regarding Title Defect Dispute(s) shall be final as between the parties.

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     Notwithstanding anything herein to the contrary, in no event shall either party have any obligations hereunder with respect to any Title Defects or Interest Adjustments except to the extent that (i) each such Title Defect or Interest Adjustment exceeds One Thousand Dollars ($1,000) and (ii) all such Title Defects and Interest Adjustments exceed in the aggregate One Hundred Twenty-Five Thousand Dollars (US $125,000), and each party hereby waives all upward or downward adjustments to the Purchase Price for Title Defects and/or Interest Adjustments the individual value of which is $1,000 or less and the cumulative value of which is $125,000 or less.

     4.3       Waiver. Except for claims Buyer asserts under Seller’s special warranty of title described in Section 9.1, all Alleged Title Defects and Interest Adjustments which are not raised by Buyer within the time period provided in Section 4.2 or which are raised and not thereafter submitted to arbitration in accordance with such Section shall be deemed waived by Buyer for all purposes, and Buyer shall have no right to seek an adjustment to the Purchase Price, make a claim against Seller or seek indemnification from Seller on account of the same. All upward Interest Adjustments which are not raised by Seller within the time period provided in Section 4.2 or which are raised and not thereafter submitted to arbitration in accordance with such Section shall be deemed waived by Seller for all purposes, and Seller shall have no right to seek an adjustment to the Purchase Price, make a claim against Buyer or seek indemnification from Buyer on account of the same.

ARTICLE 5. INSPECTION OF PROPERTIES

     5.1       Physical and Environmental Inspection. After execution of this Agreement, Seller shall permit Buyer and its authorized representatives reasonable physical access to the Properties, at times approved by Seller and at Buyer’s sole cost, risk and expense, for the purposes of inspecting the same and conducting such tests, examinations, investigations and assessments as may be reasonable and necessary to evaluate the physical and environmental condition of the Properties. Buyer shall repair any damage to the Properties resulting from its inspection and shall defend and indemnify the “Seller Group” (hereinafter defined) from any and all losses, liabilities, damages, expenses, costs, obligations and claims of whatsoever nature arising from Buyer inspecting the Properties, including, without limitation, (i) all claims for personal injury to or death of employees of Buyer, its agents, contractors, subcontractors or invitees and/or damage to the property of Buyer or others acting on behalf of Buyer, except to the extent caused by the negligence of Seller and regardless of the condition of the Properties, and (ii) all claims for personal injury to or death of employees of Seller or third parties and damage to the property of Seller or third parties, to the extent caused by the negligence, gross negligence or willful misconduct of Buyer.

     5.2      Environmental Defects.

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ARTICLE 6. ACCOUNTING

          6.1   Revenues, Expenses and Capital Expenditures. All Hydrocarbons produced prior to the Effective Time (irrespective of whether payment for the same has been made or received) which are attributable to the Properties shall belong to Seller, and all such Hydrocarbons produced from and after the Effective Time shall belong to Buyer. Seller shall be entitled to all

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revenues and related accounts receivable attributable to the ownership or operation of the Properties, and shall be responsible for all costs and expenses and related accounts payable attributable to the ownership or operation of the Properties, to the extent they relate to the time prior to the Effective Time. Buyer shall be entitled to all revenues and related accounts receivable attributable to the ownership or operation of the Properties, and shall be responsible for all costs and expenses and related accounts payable attributable to the ownership or operation of the Properties, to the extent they relate to the time from and after the Effective Time. The actual amounts or values associated with the above shall be accounted for in the Final Accounting Settlement. At Closing Seller shall transfer to Buyer, and Buyer shall assume, Seller’s suspense funds associated with the acquired Properties as of the Effective Time, and these funds shall be accounted for in the Final Accounting Settlement.

           6.2       Taxes. All taxes and assessments, including without limitation, excise, ad valorem, property, production and severance taxes and any other federal, state and local taxes and assessments attributable to the ownership or operation of the Properties prior to the Effective Time shall remain Seller’s responsibility, and all deductions, credits and refunds pertaining to the aforementioned taxes and assessments, no matter when received, shall belong to Seller. All taxes and assessments, including without limitation, excise, ad valorem, property, production and severance taxes and any other federal, state and local taxes and assessments attributable to the ownership or operation of the Properties after the Effective Time shall be Buyer’s responsibility, and all deductions, credits and refunds pertaining to the aforementioned taxes and assessments, no matter when received, shall belong to Buyer. The actual amounts or values associated with the above, if any, shall be accounted for in the Final Accounting Settlement. The parties agree that the transaction contemplated herein is an occasional sale of assets by Seller in which Seller does not trade in the ordinary course of its business. Accordingly, the parties will take commercially reasonable actions to establish the occasional sale exemption from any sales tax associated with the transaction contemplated herein. Notwithstanding the foregoing, Buyer shall be solely responsible for all transfer, sales, use or similar taxes resulting from or associated with the transaction contemplated under this Agreement.

           6.3      Obligations and Credits. Any and all prepaid insurance premiums, utility charges, taxes, rentals and any other prepays, to the extent applicable to periods of time after the Effective Time and to the extent attributable to the Properties shall be reimbursed to Seller by Buyer; and accrued payables applicable to periods of time prior to the Effective Time, if any, and attributable to the Properties shall be the responsibility of Seller. The actual amounts or values associated with the above shall be accounted for in the Final Accounting Settlement.

           6.4      Gas Imbalances. Seller’s estimate of the aggregate gas imbalance as of the Effective Time for all the Properties is 33,826 mcf under produced (cumulative working interests), as more particularly set forth for each of the Properties on Exhibit G. In the event such gas imbalance estimate is revised by Seller prior to Closing, Seller shall provide Buyer with a revised gas imbalance schedule for all the Properties as of the Effective Time. There shall be a Purchase Price adjustment at Closing for the volumetric difference in the estimated and revised

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imbalance calculated on Seller’s net revenue interest at a price of $1.00 per mcf. To the extent that there is any difference between Seller’s actual aggregate gas imbalance as of the Effective Time and the imbalance position settled at Closing, then an adjustment shall be made at the $1.00 per net mcf rate in the Final Accounting Settlement. There shall be no further gas imbalance adjustments after the Final Settlement Date. In the event of a Title Defect affecting all or a portion of the Properties, the aggregate gas imbalance shown above shall be adjusted to take into account the affected Property. Any Purchase Price adjustments for gas imbalances shall be made only on those Properties purchased by Buyer.

           6.5     Miscellaneous Accounting.

           6.6     Final Accounting Settlement. As soon as reasonably practicable, but in no event later than one hundred twenty (120) Days after Closing, Seller shall deliver to Buyer a post-Closing statement setting forth a detailed final calculation of all post-Closing adjustments applicable to the period between the Effective Time and the Closing Date (“Final Accounting Settlement”). As soon as reasonably practicable, but in no event later than thirty (30) Days after Buyer receives the post-Closing statement, Buyer shall deliver to Seller a written report containing any changes Buyer proposes to be made to such statement. As soon as reasonably practicable, but in no event later than thirty (30) Days after Seller receives Buyer’s proposed changes to the post-Closing statement, the parties shall meet and undertake to agree on the post-Closing adjustments. If the parties fail to agree on the post-Closing adjustments, resolution shall be handled in accordance with Section 6.8. The date upon which all amounts associated with the Final Accounting Settlement are agreed to by the parties, whether by decision of the Accounting Referee or otherwise, shall be herein called the “Final Settlement Date”. Any amounts owed by either party to the other as a result of such post-Closing adjustments shall be paid within five (5) Business Days after the Final Settlement Date.

           6.7     Post-Final Accounting Settlement. Any revenues received or costs and expenses paid by Buyer after the Final Accounting Settlement which are attributable to the ownership or operation of the Properties prior to the Effective Time shall be billed to or reimbursed to Seller, as appropriate. Any revenues received or costs and expenses paid by Seller after the Final Accounting Settlement which are attributable to the ownership or operation of the Properties after the Effective Time shall be billed to or reimbursed by Buyer, as appropriate.

           6.8     AuditRights. In order to verify the information provided by the parties under this Article 6, Buyer and Seller shall each have the right to conduct, at such party’s sole expense, an

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audit of the other party’s records relating thereto for a period of one (1) year after the Closing Date. Objections or exceptions which are not raised within such one-year audit period shall be conclusively deemed to be waived by the parties for all purposes, and neither party shall have the right to make a claim against the other party or seek indemnification or reimbursement from the other party associated with the same.If within such fifteen (15) Days after receiving the results of a party’s audit conducted in accordance with this Article, the parties still cannot reach agreement, the disputed items shall be resolved by submitting the same to KPMG LLP, or if such firm declines to act in such capacity, by such other firm of independent nationally recognized accountants mutually acceptable to the parties (the “Accounting Referee”). The Accounting Referee shall be instructed to resolve the accounting dispute(s) within thirty (30) Days after having the relevant materials submitted to it for review. The decision of the Accounting Referee shall be binding and non-appealable by the parties. The fees and expenses associated with the Accounting Referee shall be borne equally by Buyer and Seller.

ARTICLE 7. CASUALTY AND CONDEMNATION

     If a substantial part of the Properties shall be (a) destroyed prior to Closing by a Casualty Loss, or (b) taken in condemnation or if proceedings for such purposes shall be pending (collectively referred to as a “Taking”); then either Buyer or Seller may terminate this Agreement prior to the Closing. For the purpose of this Article 7, the term “substantial” shall be defined as twenty percent (20%) of the unadjusted Purchase Price. If either party terminates this Agreement in accordance with this Section, neither party shall have any further obligations, except as provided in this Article and in Section 15.2.1.

     If neither party terminates this Agreement, this Agreement shall remain in full force and effect, and Seller and Buyer shall attempt to agree on a reduction in the Purchase Price, reflecting the reduction in the value of the Properties affected by the Casualty Loss and/or Taking. If the parties cannot agree on a reduction, the Seller’s good faith calculation shall be used for purposes of Closing. Notwithstanding anything herein to the contrary, in no event shall either party have any obligations hereunder with respect to any Casualty Loss and/or Taking except to the extent that the value of all such Casualty Losses and/or Takings exceed in the aggregate Fifty Thousand Dollars (US $50,000), and Buyer hereby waives all downward adjustments to the Purchase Price for all Casualty Losses and/or Takings the cumulative value of which is $50,000 or less. Unless otherwise agreed by the parties, Seller shall retain any and all sums paid to Seller, unpaid awards, insurance proceeds and other payments associated with or attributable to Casualty Losses and/or Takings.

     If there is a dispute over the value of any Casualty Loss and/or Taking, Buyer may submit the matter to arbitration in accordance with Article 13 within sixty (60) Days after Closing, or if a party terminates this Agreement under this provision and the other party disputes the party’s right to terminate hereunder, the disputing party may submit the matter to arbitration in accordance with Article 13 within sixty (60) Days after the date which had been scheduled for Closing.If Buyer disputes the Purchase Price adjustment for any Casualty Loss and/or Taking or a

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party disputes termination, and Buyer or the disputing party, as applicable, does not initiate an arbitration proceeding to resolve the matter within the applicable time periods specified in the foregoing sentence, such party in either case shall be deemed to have waived its rights with respect to such dispute.

ARTICLE 8. INDEMNITIES

           8.1     Seller’s Indemnity Obligations (excluding Environmental Claims). EXCEPT FOR ENVIRONMENTAL CLAIMS WHICH SHALL BE HANDLED IN ACCORDANCE WITH SECTION 8.3, SELLER SHALL RELEASE BUYER AND BUYER’S AFFILIATES AND THEIR RESPECTIVE OFFICERS, DIRECTORS AND EMPLOYEES (COLLECTIVELY, THE “BUYER GROUP”) FROM AND SHALL FULLY PROTECT, INDEMNIFY, AND DEFEND BUYER GROUP FROM AND AGAINST ANY AND ALL CLAIMS AND ANY AND ALL OCCURRENCES AND CONDITIONS WHICH WOULD CONSTITUTE CLAIMS BUT WHICH ARE ASSERTED BY SELLER, RELATING TO, ARISING OUT OF, OR CONNECTED WITH SELLER’S OWNERSHIP OR OPERATION OF THE PROPERTIES PRIOR TO THE EFFECTIVE TIME, REGARDLESS OF ANY NEGLIGENCE OF ACT OR OMISSION BY BUYER GROUP; PROVIDED, HOWEVER, THAT PROPER NOTICE UNDER SECTION 8.5 SHALL HAVE BEEN SUBMITTED TO SELLER WITHIN SIX (6) MONTHS AFTER THE CLOSING DATE, AND FURTHER PROVIDED THAT BUYER SHALL BEAR SOLE RESPONSIBILITY FOR THE COSTS ASSOCIATED WITH ALL SUCH CLAIMS (IN AGGREGATE) UP TO ONE HUNDRED TWENTY-FIVE THOUSAND DOLLARS (US $125,000).

           8.2     Buyer’s Indemnity Obligations (excluding Environmental Claims). EXCEPT FOR ENVIRONMENTAL CLAIMS WHICH SHALL BE HANDLED IN ACCORDANCE WITH SECTION 8.3 AND EXCEPT AS EXPRESSLY SET FORTH IN THIS AGREEMENT, BUYER SHALL RELEASE SELLER AND SELLER’S AFFILIATES AND THEIR RESPECTIVE OFFICERS, DIRECTORS AND EMPLOYEES (COLLECTIVELY, THE “SELLER GROUP”) FROM AND SHALL FULLY PROTECT, INDEMNIFY, AND DEFEND THE SELLER GROUP FROM AND AGAINST ANY AND ALL CLAIMS AND ANY AND ALL OCCURRENCES AND CONDITIONS WHICH WOULD CONSTITUTE CLAIMS BUT WHICH ARE ASSERTED BY BUYER RELATING TO, ARISING OUT OF, OR CONNECTED WITH THE OWNERSHIP OR OPERATION OF THE PROPERTIES (i) PERTAINING TO THE PERIOD AFTER THE EFFECTIVE TIME, AND (ii) PERTAINING TO THE PERIOD PRIOR TO THE EFFECTIVE TIME, UNLESS SUCH CLAIMS OR OCCURRENCES AND CONDITIONS SHALL HAVE BEEN SUBMITTED TO SELLER IN ACCORDANCE WITH THE NOTICE PROVISIONS HEREOF WITHIN SIX (6) MONTHS AFTER THE CLOSING DATE AND ARE IN THE AGGREGATE GREATER THAN ONE HUNDRED TWENTY-FIVE THOUSAND DOLLARS (US $125,000). THIS INDEMNITY SHALL

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APPLY REGARDLESS OF ANY NEGLIGENCE OF ACT OR OMISSION BY SELLER GROUP.

           8.3     Environmental Claims. BUYER SHALL RELEASE SELLER GROUP AND SHALL FULLY PROTECT, INDEMNIFY, AND DEFEND SELLER GROUP FROM AND AGAINST ANY AND ALL ENVIRONMENTAL CLAIMS AND ANY AND ALL OCCURRENCES AND CONDITIONS WHICH WOULD CONSTITUTE ENVIRONMENTAL CLAIMS BUT WHICH ARE ASSERTED BY BUYER PERTAINING TO THE PROPERTIES AND RELATING TO THE PERIOD FROM AND AFTER THE EFFECTIVE TIME. SELLER SHALL RELEASE BUYER GROUP AND SHALL FULLY PROTECT, INDEMNIFY, AND DEFEND BUYER GROUP FROM AND AGAINST ALL ENVIRONMENTAL CLAIMS PERTAINING TO THE PROPERTIES AND RELATING TO THE PERIOD PRIOR TO THE EFFECTIVE TIME THAT ARE IN THE AGGREGATE GREATER THAN AN AMOUNT EQUAL TO THE DIFFERENCE BETWEEN (i) ONE HUNDRED TWENTY-FIVE THOUSAND DOLLARS (US $125,000) AND (ii) THE AGGREGATE VALUE OF ALL ENVIRONMENTAL DEFECTS UNDER SECTION 5.2 ABOVE, IT BEING AGREED THAT BUYER SHALL BEAR SOLE RESPONSIBILITY FOR THE COSTS ASSOCIATED WITH ALL ENVIRONMENTAL DEFECTS UNDER SECTION 5.2 ABOVE AND ALL ENVIRONMENTAL CLAIMS UNDER THIS SECTION 8.3 (IN AGGREGATE) UP TO ONE HUNDRED TWENTY-FIVE THOUSAND DOLLARS (US $125,000).

           8.4     Asbestos and NORM. The parties acknowledge that the Properties may contain asbestos and/or NORM, and that special procedures may be required for the assessment, remediation, removal, transportation or disposal of asbestos and NORM. Buyer agrees to assume any and all liability associated with or attributable to the assessment, remediation, removal, transportation and disposal of the asbestos or NORM associated with or attributable to the Properties and shall conduct said activities in accordance with all applicable Laws.

           8.5      Notice and Cooperation. If a Claim is asserted against a party for which the party would be liable under the provisions of this Agreement, it is a condition precedent to the indemnifying party’s obligations hereunder that the indemnified party gives the indemnifying party written notice of such Claim setting forth full particulars of the Claim, as known by the indemnified party, including a copy of the Claim (if it was a written Claim.) The indemnified party shall make a good faith effort to notify the indemnifying party within one (1) month of receipt of a Claim and shall in all events effect such notice within such time as will allow the indemnifying party to defend against such Claim and no later than three (3) calendar months after receipt of the Claim by the indemnified party. The notice of a Claim given hereunder is referred to as a “Claim Notice.”

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                8.6      Defense of Claims.

                8.7     Waiver of Certain Damages. Each of the parties hereby waives, and agrees not to seek, indirect, consequential, punitive, exemplary or special damages of any kind with respect to any Claim, occurrence, condition or dispute, arising out of or relating to this Agreement or breach hereof; provided, however, that this provision does not diminish or affect in any way the parties’ rights and obligations under any indemnities provided for in this Agreement.

                8.8.     Limitation on Indemnities. In no event shall an indemnifying party have any obligation of indemnification to the other party, if the Claim, occurrence, condition or dispute for which indemnity is sought was caused by the gross negligence or willful

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misconduct on the part of the indemnified party and/or its officers, directors, employees, agents, contractors, subcontractors, Affiliates or predecessors. Notwithstanding anything contained herein to the contrary, the indemnities provided for in this Agreement shall be enforceable only by the parties hereto and not by either party’s successors or assigns, it being expressly agreed that such indemnities shall be deemed a personal covenant between Seller and Buyer and not a covenant that runs with the Properties.

ARTICLE 9. WARRANTIES AND DISCLAIMERS

                9.1         Special Warranty of Title. Seller shall warrant and defend title to the Properties conveyed to Buyer against every person whomsoever lawfully claiming the Properties or any part thereof by, through or under Seller, but not otherwise, and subject to the Permitted Encumbrances.

                9.2         Disclaimer – Representations and Warranties. BUYER ACKNOWLEDGES AND AGREES THAT THE PROPERTIES ARE BEING SOLD, ASSIGNED AND CONVEYED FROM SELLER TO BUYER “AS-IS, WHERE-IS”, AND WITH ALL FAULTS IN THEIR PRESENT CONDITION AND STATE OF REPAIR, WITHOUT RECOURSE. EXCEPT AS EXPRESSLY SET FORTH IN THIS AGREEMENT, SELLER HEREBY DISCLAIMS ANY AND ALL REPRESENTATIONS AND WARRANTIES CONCERNING THE PROPERTIES, EXPRESS, STATUTORY, IMPLIED OR OTHERWISE, INCLUDING WITHOUT LIMITATION, ANY WARRANTY OF TITLE (EXCEPT AS SET FORTH IN SECTION 9.1), THE QUALITY OF HYDROCARBON RESERVES, THE QUANTITY OF HYDROCARBON RESERVES, THE AMOUNT OF REVENUES, THE AMOUNT OF OPERATING COSTS, CONDITION (PHYSICAL OR ENVIRONMENTAL), QUALITY, COMPLIANCE WITH APPLICABLE LAWS, ABSENCE OF DEFECTS (LATENT OR PATENT), SAFETY, STATE OF REPAIR, MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, AND BUYER EXPRESSLY RELEASES SELLER FROM THE SAME.

                9.3        Disclaimer – Statements and Information. EXCEPT AS EXPRESSLY SET FORTH IN THIS AGREEMENT, SELLER DISCLAIMS ANY AND ALL LIABILITY AND RESPONSIBILITY FOR AND ASSOCIATED WITH THE QUALITY, ACCURACY, COMPLETENESS OR MATERIALITY OF THE RECORDS AND ANY OTHER INFORMATION PROVIDED AT ANY TIME (WHETHER ORAL OR WRITTEN) TO BUYER, ITS OFFICERS, AGENTS, EMPLOYEES AND REPRESENTATIVES IN CONNECTION WITH THE TRANSACTION CONTEMPLATED HEREIN, INCLUDING WITHOUT LIMITATION, QUALITY OF HYDROCARBON RESERVES, QUANTITY OF HYDROCARBON RESERVES, AMOUNT OF REVENUES, AMOUNT OF OPERATING COSTS, FINANCIAL DATA, CONTRACT DATA, ENVIRONMENTAL CONDITION OF THE PROPERTIES, PHYSICAL CONDITION OF THE PROPERTIES AND CONTINUED FINANCIAL

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VIABILITY OF THE PROPERTIES, AND BUYER EXPRESSLY RELEASES SELLER FROM THE SAME.

ARTICLE 10. SELLER’S REPRESENTATIONS

     Seller represents to Buyer that on the date hereof and as of the Closing Date:

                10.1         Organization and Good Standing. Seller is a corporation duly organized, validly existing and in good standing under the Laws of the State of Arkansas, and has all requisite corporate power and authority to own and lease the Properties. Seller is duly licensed or qualified to do business as a foreign corporation and is in good standing in all jurisdictions in which the Properties are located.

                10.2         Corporate Authority; Authorization of Agreement. Seller has all requisite corporate power and authority to execute and deliver this Agreement, to consummate the transactions contemplated herein and to perform all of the terms and conditions to be performed by it as provided for in this Agreement. The execution and delivery of this Agreement by Seller, the performance by Seller of all of the terms and conditions to be performed by it and the consummation of the transactions contemplated herein have been duly authorized and approved by all necessary corporate action. This Agreement has been duly executed and delivered by Seller and constitutes the valid and binding obligation of Seller, enforceable against it in accordance with its terms, except as such enforceability may be limited by bankruptcy, insolvency or other Laws relating to or affecting the enforcement of creditors’ rights and general principles of equity (regardless of whether such enforceability is considered in a proceeding at law or in equity).

                10.3          No Violations. The execution and delivery of this Agreement by Seller does not, and the fulfillment and compliance with the terms and conditions hereof and the consummation of the transactions contemplated herein, will not:

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     10.4       Absence of Certain Changes. Between the Effective Time and the execution date hereof, there has not been:

     10.5       Operating Costs. To the best of Seller’s knowledge, all costs incurred in connection with the operation of the Properties have been fully paid and discharged by Seller, except normal expenses incurred in operating the Properties within the previous sixty (60) Days or as to which Seller has not yet been billed or as to which Seller is disputing in good faith.

     10.6       Litigation and Other Disputes. Seller shall retain liability for the matters listed on Exhibit E. Except for the matters listed on Exhibit E, there is no action, suit or proceeding pending or, to the best of Seller’s knowledge, threatened against Seller or the Properties which would reasonably be expected to have a material adverse effect on Buyer or Buyer’s interest in the Properties after Closing or to prevent the consummation of the transaction contemplated by this Agreement. For purposes of this provision, “material” means an impact of greater than Fifty Thousand Dollars (US $50,000) in the aggregate.

     10.7       Bankruptcy. There are no bankruptcy, reorganization or receivership proceedings pending, being contemplated by or, to the best of Seller’s knowledge, threatened against Seller.

     10.8       Leases. To the best of Seller’s knowledge, (i) the Leases have been maintained in material compliance with their terms, are valid, binding and in full force and effect, (ii) there are no defaults by Seller in the performance of any of the material terms and conditions of the Leases and (iii) no event has occurred that with the lapse of time or action or inaction by any party would result in a material violation of the Leases or a default thereunder. To the best of Seller’s knowledge, all royalties (including shut-in payments), rental, deposits and other amounts due on the Properties have been properly and timely paid.

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     10.9       Hydrocarbon Sales; Imbalances. Except as otherwise provided in Section 6.4, Seller has not been nor will Buyer after the Effective Time be obligated by virtue of any prepayment made under any gas transportation, production sales contract or any other contract containing a “take or pay” clause, or under any gas balancing, deferred production or similar arrangement to deliver oil, gas or other minerals produced from or allocated to any of the Properties at such future time without receiving full payment therefor at the time of delivery.

     10.10       Existing Commitments. Except as described on Exhibit H and except for any commitment for expenditures of less than $10,000, there are no existing commitments or obligations to pay costs or expenses for drilling, completing, equipping, deepening, side tracking, reworking or other similar costs or expenses arising from or relating to the ownership of the Properties. Except as otherwise provided in the Material Contracts, there are no obligations or commitments presently existing under which Seller’s interest in the Properties will be altered due to the passage of time, the collection of a specified sum of money (including, for example, non-consent operations and back-in obligations) or other reason.

     10.11       Compliance With Law . Except for those matters disclosed on Exhibit and such other matters as would not have a material adverse effect on the value of the Properties, Seller (i) is in material compliance with all Laws applicable to Seller or those Properties that are operated by Seller and (ii) has not received notice of and is not aware of any facts, conditions or circumstances relating to the ownership or operation of the Properties that could reasonably be expected to give rise to any claim or assertion that Seller, the Properties or the ownership or operation thereof is not in material compliance with any Law applicable to Seller or the Properties. For purposes of this provision, “material” means an impact of greater than One Hundred Twenty-Five Thousand Dollars (US $125,000) in the aggregate.

     10.12       Availability of Records. To the best of Seller’s knowledge, Seller has provided Buyer with access to all Records in Seller’s possession in connection with Buyer’s due diligence review of the Properties.

     10.13       Limitation on Representations. The representations contained in Sections 10.1 through 10.4 shall survive Closing indefinitely. The representations contained in Sections 10.5 through 10.12 shall survive Closing for a period of six (6) months after the Closing Date and shall thereupon terminate.

ARTICLE 11. BUYER’S REPRESENTATIONS

     Buyer represents to Seller that on the date hereof and as of the Closing Date:

     11.1       Organization and Good Standing. Buyer is a limited liability company duly organized, validly existing and in good standing under the Laws of the State of Oklahoma and has all requisite power and authority to own and lease the Properties. Buyer is duly licensed or

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qualified to do business as a foreign corporation and is in good standing in all jurisdictions in which the Properties are located.

     11.2      Corporate Authority; Authorization of Agreement. Buyer has all requisite power and authority to execute and deliver this Agreement, to consummate the transactions contemplated herein and to perform all the terms and conditions to be performed by it as provided for in this Agreement. The execution and delivery of this Agreement by Buyer, the performance by Buyer of all the terms and conditions to be performed by it and the consummation of the transactions contemplated herein have been duly authorized and approved by all necessary action. This Agreement has been duly executed and delivered by Buyer and constitutes the valid and binding obligation of Buyer, enforceable against it in accordance with its terms, except as such enforceability may be limited by bankruptcy, insolvency or other Laws relating to or affecting the enforcement of creditors’ rights and general principles of equity (regardless of whether such enforceability is considered in a proceeding at law or in equity).

     11.3      No Violations. The execution and delivery of this Agreement by Buyer does not, and the fulfillment and compliance with the terms and conditions hereof and the consummation of the transactions contemplated herein, do not:

     11.4       SEC Disclosure. Buyer is an experienced and knowledgeable investor and operator in the oil and gas business. Buyer is acquiring the Properties for its own account for use in its trade or business, and not with a view toward or for sale in connection with any distribution thereof, nor with any present intention of making a distribution thereof within the meaning of the Securities Act of 1933, as amended.

     11.5       Independent Evaluation. As of Closing, Buyer represents that it is sophisticated in the evaluation, purchase, operation and ownership of oil and gas properties and that in making its decision to enter into this Agreement and to consummate

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the transaction contemplated herein, Buyer has relied and shall rely solely on its own independent investigation and evaluation of the Properties and has satisfied itself as to the physical condition and environmental condition of the Properties.

     11.6      Buyer’s Reliance. Buyer acknowledges and agrees that it is entitled to rely only on the express representations and warranties set forth in this Agreement.

     11.7      Qualified Buyer. Buyer possesses all required governmental licenses, permits, bonds, certificates, orders and authorizations necessary to own and/or operate the Properties, except those customarily obtained after the sale or conveyance of the Properties.

     11.8      Limitation on Representations. The representations contained in Sections 11.1 through 11.4 shall survive Closing indefinitely. The representations contained in Sections 11.5 through 11.7 shall survive Closing for a period of six (6) months after the Closing Date and shall thereupon terminate.

ARTICLE 12. ADDITIONAL AGREEMENTS

     12.1      Covenants of Seller. From the date hereof until Closing, without first obtaining the consent of Buyer, Seller has not and will not:

     12.2      Notice of Loss. From the date hereof until Closing, Seller shall promptly notify Buyer of any loss or damage to the Properties, or any part thereof, known to Seller and in the aggregate exceeding Ten Thousand Dollars (US $10,000) net to Seller’s interest.

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     12.3      Operations Pending Closing. During the period from the Effective Time to the Closing Date, Seller shall continue to operate those Properties that are operated by Seller in the normal course of business in accordance with Seller’s historical operating practices and using the same standard of care as is imposed on the “Operator” under the operating agreements applicable to such Properties.

     12.4      Subsequent Operations. Seller makes no representations or warranties to Buyer as to the transferability or assignability of operatorship of the Properties. Buyer acknowledges that the rights and obligations associated with operatorship of the Properties are governed by the applicable agreement(s) and that operatorship of the Properties shall be decided in accordance with the terms of said agreement(s); provided, however, Seller agrees to provide reasonable assistance to Buyer (at no expense to Seller) in connection with Buyer’s effort to be designated as operator of the Properties.

     12.5      Buyer’s Assumption of Obligations. Except as expressly set forth in this Agreement, Buyer agrees to assume and shall timely perform and discharge all duties and obligations of Seller relating to or arising out of the ownership of the Properties from and after the Effective Time, including, without limitation, all duties and obligations of Seller under all the Assumed Contracts, and Buyer shall indemnify and hold Seller harmless from and against any and all liabilities of whatsoever nature arising out of Buyer’s failure to properly perform or discharge such duties and obligations. Buyer agrees to accept full responsibility for Seller’s proportionate share of the costs and expenses associated with or attributable to the plugging and abandonment of all wells, and the removal of all equipment, platforms and facilities conveyed to Buyer under this Agreement and the remediation, restoration and clean up of the Properties. In conducting the duties and obligations contained in this Section 12.5, Buyer shall comply with the applicable Laws of all governmental entities and tribal authorities having appropriate jurisdiction.

     12.6      Records. Within thirty (30) Days after Closing, Seller shall furnish to Buyer all Records which are maintained by Seller, provided, however, that Seller is entitled to retain copies of any or all such Records and to retain as long as needed, the originals of any Records required in connection with any litigation or other proceedings listed on Exhibit E. Buyer agrees to maintain the Records received from Seller, and any other records that Buyer may receive from the current operators of any of the Properties, in accordance herewith for a period of six (6) years after the Closing Date and to afford Seller reasonable access to as requested by Seller. If Buyer desires to dispose of any such records prior to the end of the six (6) year period, Buyer shall offer in writing to Seller to deliver such records to Seller; if Seller elects not to receive such records or fails to respond to Buyer’s notice within thirty (30) Business Days after receipt thereof, then Buyer may dispose of such records within its discretion.

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ARTICLE 13. ARBITRATION

     ANY DISPUTE ARISING UNDER THIS AGREEMENT (“ARBITRABLE DISPUTE”) SHALL BE REFERRED TO AND RESOLVED BY BINDING ARBITRATION IN HOUSTON, TEXAS BY THREE (3) ARBITRATORS, IN ACCORDANCE WITH THE COMMERCIAL ARBITRATION RULES OF THE AMERICAN ARBITRATION ASSOCIATION; AND, TO THE MAXIMUM EXTENT APPLICABLE, THE FEDERAL ARBITRATION ACT (TITLE 9 OF THE UNITED STATES CODE). IF THERE IS ANY INCONSISTENCY BETWEEN THIS ARTICLE AND ANY STATUTE OR RULES, THIS ARTICLE SHALL CONTROL. ARBITRATION SHALL BE INITIATED (a) WITHIN THE APPLICABLE TIME LIMITS SET FORTH IN THIS AGREEMENT AND NOT THEREAFTER, PROVIDED THAT IF NO TIME LIMIT IS GIVEN, WITHIN THE TIME PERIOD ALLOWED BY THE APPLICABLE STATUTE OF LIMITATIONS, (b) BY ONE PARTY (“CLAIMANT”) GIVING WRITTEN NOTICE TO THE OTHER OR ADVERSARIAL PARTY (“RESPONDENT”) AND TO THE HOUSTON REGIONAL OFFICE OF THE AMERICAN ARBITRATION ASSOCIATION (“AAA”), ATTENTION: REGIONAL VICE PRESIDENT, WITH A COPY TO THE ADMINISTRATOR OF THE AAA, THAT THE CLAIMANT ELECTS TO REFER THE ARBITRABLE DISPUTE TO ARBITRATION, AND THAT THE CLAIMANT HAS APPOINTED AN ARBITRATOR, WHO SHALL BE IDENTIFIED IN SUCH NOTICE. THE RESPONDENT SHALL NOTIFY THE CLAIMANT AND THE AAA WITHIN TEN (10) DAYS AFTER RECEIPT OF CLAIMANT’S NOTICE, IDENTIFYING THE ARBITRATOR WHO THE RESPONDENT HAS APPOINTED. THE TWO (2) ARBITRATORS SO CHOSEN SHALL SELECT A THIRD ARBITRATOR WITHIN TEN (10) DAYS AFTER THE SECOND ARBITRATOR HAS BEEN APPOINTED. UPON FAILURE OF A PARTY TO ACT WITHIN THE TIME SPECIFIED FOR NAMING AN ARBITRATOR, SUCH ARBITRATOR SHALL BE APPOINTED BY THE ADMINISTRATOR’S DESIGNEE. SELLER SHALL PAY THE COMPENSATION AND EXPENSES OF THE ARBITRATOR NAMED BY OR FOR IT, BUYER SHALL PAY THE COMPENSATION AND EXPENSES OF THE ARBITRATOR NAMED BY OR FOR IT, AND SELLER AND BUYER SHALL EACH PAY ONE-HALF OF THE COMPENSATION AND EXPENSES OF THE THIRD ARBITRATOR, PROVIDED HOWEVER THAT ALL COSTS CAN BE ASSESSED AGAINST THE LOSING PARTY, IF THE ARBITRATORS SO DECIDE. ALL ARBITRATORS MUST BE NEUTRAL PARTIES WHO HAVE NEVER BEEN OFFICERS, DIRECTORS OR EMPLOYEES OF THE PARTIES OR ANY OF THEIR AFFILIATES, MUST HAVE NOT LESS THAN FIFTEEN (15) YEARS EXPERIENCE IN THE OIL AND GAS INDUSTRY, AND MUST HAVE A FORMAL FINANCIAL/ACCOUNTING, ENGINEERING OR LEGAL EDUCATION. THE HEARING SHALL BE COMMENCED WITHIN THIRTY (30) DAYS AFTER THE SELECTION OF THE ARBITRATORS. THE PARTIES AND THE ARBITRATORS SHALL PROCEED DILIGENTLY AND IN GOOD FAITH IN ORDER THAT THE

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ARBITRAL AWARD SHALL BE MADE AS PROMPTLY AS POSSIBLE. THE INTERPRETATION, CONSTRUCTION AND EFFECT OF THIS AGREEMENT SHALL BE GOVERNED BY THE LAWS OF TEXAS, AND TO THE MAXIMUM EXTENT ALLOWED BY LAW, IN ALL ARBITRATION PROCEEDINGS THE LAWS OF TEXAS SHALL BE APPLIED, WITHOUT REGARD TO ANY CONFLICTS OF LAWS PRINCIPLES. ALL STATUTES OF LIMITATION AND OF REPOSE THAT WOULD OTHERWISE BE APPLICABLE SHALL APPLY TO ANY ARBITRATION PROCEEDING. THE TRIBUNAL SHALL NOT HAVE THE AUTHORITY TO GRANT OR AWARD INDIRECT, CONSEQUENTIAL, PUNITIVE, EXEMPLARY OR SPECIAL DAMAGES.

ARTICLE 14. CONDITIONS PRECEDENT TO CLOSING

     14.1      Conditions Precedent to Seller’s Obligation to Close. Seller shall be obligated to consummate the sale of the Properties as contemplated by this Agreement on the Closing Date, provided the following conditions precedent have been satisfied or have been waived by Seller:

     14.2      Conditions Precedent to Buyer’s Obligation to Close. Buyer shall be obligated to consummate the purchase of the Properties as contemplated by this Agreement on the Closing Date, provided that the following conditions precedent have been satisfied or have been waived by Buyer:

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ARTICLE 15. TERMINATION

     15.1      Grounds for Termination. This Agreement may be terminated at any time prior to Closing:

     15.2      Effect of Termination.

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     15.3      Dispute over Right to Terminate. If there is a dispute between the parties over either party’s right to terminate this Agreement under Section 15.1, Closing shall not occur, as scheduled. The party which disputes the other party’s right to terminate may initiate arbitration proceedings in accordance with Article 13 within thirty (30) Days after the date on which Closing was scheduled to occur and, if arbitration is so initiated, the dispute will be resolved through such arbitration proceeding. If the party which disputes the termination right does not initiate an arbitration proceeding to resolve the dispute within the time period specified hereinabove, such party shall be deemed to have waived its right to object to such termination.

     15.4      Return of Documents. If this Agreement is terminated, each party shall return to the party which owns or is otherwise entitled thereto all books, records, maps, files, papers and other property in such party’s possession (including copies of such materials and extracts therefrom) relating to the transaction contemplated by this Agreement.

     15.5      Confidentiality. Notwithstanding the termination of this Agreement or any other provision of this Agreement to the contrary, the terms of the letter agreement executed by and among Seller, Anadarko Minerals, Inc. and Exploration Associates II, LLC dated October 8, 2002, shall remain in full force and effect.

ARTICLE 16. THE CLOSING

     16.1.      Preliminary Closing Statement. At least two (2) Days prior to the Closing Date, Seller shall provide Buyer with a preliminary Closing statement setting forth the adjusted Purchase Price and wiring instructions designating the account or accounts to which the adjusted Purchase Price is to be delivered in accordance with Section 16.3.2. Prior to the Closing Date, Buyer shall furnish Seller with Buyer’s requested adjustments to such statement. Seller and Buyer shall attempt in good faith to resolve any differences between them, but if the parties are unable to agree, Seller’s preliminary Closing statement shall be used for Closing.

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     16.2      Obligations of Seller at Closing. At the Closing, Seller shall deliver to Buyer, unless waived by Buyer, the following:

     16.3      Obligations of Buyer at Closing. At the Closing, Buyer shall deliver to Seller, unless waived by Seller, the following:

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     16.4      Site of Closing. Closing shall be held in Seller’s offices in Houston, Texas or any other location mutually agreed in writing by Seller and Buyer.

ARTICLE 17. MISCELLANEOUS

     17.1      Notices. All notices and other communications required, permitted or desired to be given hereunder must be in writing and sent by U.S. mail, properly addressed as shown below, and with all postage and other charges fully prepaid or by hand delivery or by facsimile transmission. Date of service by mail and hand delivery is the date on which such notice is received by the addressee and by facsimile is the date sent (as evidenced by fax machine confirmation of receipt), or if such date is not on a Business Day, then on the next date which is a Business Day. Each party may change its address by notifying the other party in writing.

     17.2      Conveyance Costs. Buyer shall be solely responsible for filing and recording documents related to the transfer of the Properties from Seller to Buyer and for all costs and fees associated therewith, including filing the assignment of the Properties with appropriate federal, state and local authorities as required by applicable Law. Promptly following Buyer’s receipt of

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the recorded documents, Buyer shall furnish Seller with all recording data and evidence of all required filings.

     17.3      Brokers’ Fees. Neither party has retained any brokers, agents or finders in connection with this transaction that would result in any liability on the other party for any fees or commission. Each party agrees to release, protect, indemnify, defend and hold the other harmless from and against any and all Claims with respect to any commissions, finders’ fees or other remuneration due to any broker, agent or finder claiming by, through or under such party.

     17.4      Further Assurances. From and after Closing, at the request of Seller but without further consideration, Buyer will execute and deliver or use reasonable efforts to cause to be executed and delivered such other instruments of conveyance and take such other actions as Seller reasonably may request to more effectively put Seller in possession of any property which was not intended by the parties to be conveyed by Buyer. From and after Closing, at the request of Buyer but without further consideration, Seller shall execute and deliver or use reasonable efforts to cause to be executed and delivered such other instruments of conveyance and take such other actions as Buyer reasonably may request to more effectively put Buyer in possession of the Properties. If any of the Properties are incorrectly described, the description shall be corrected upon proof of the proper description.

     17.5      Survival of Representations and Warranties. Unless otherwise expressly limited herein, all representations, warranties, indemnities, covenants and agreements contained in this Agreement, to the extent not fully performed or waived prior to Closing, shall survive the Closing indefinitely. The parties have made no representations or warranties except those expressly set forth in this Agreement.

     17.6      Amendments and Severability. No amendments or other changes to this Agreement shall be effective or binding on either of the parties unless the same shall be in writing and signed by both Seller and Buyer. The invalidity of any one or more provisions of this Agreement shall not affect the validity of this Agreement as a whole, and in case of any such invalidity, this Agreement shall be construed as if the invalid provision had not been included herein.

     17.7      Successors and Assigns. This Agreement shall not be assigned, either in whole or in part, without the prior express written consent of the non-assigning party. Assignment of this Agreement by either party shall not relieve the assigning party of liability hereunder in the event of non-performance or breach of this Agreement by such party’s assignee. The terms, covenants and conditions contained in this Agreement shall be binding upon and shall inure to the benefit of Seller and Buyer and their respective successors and assigns, and such terms, covenants and conditions shall be covenants running with the land and with each subsequent transfer or assignment of the Properties.

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     17.8      Headings. The titles and headings set forth in this Agreement have been included solely for ease of reference and shall not be considered in the interpretation or construction of this Agreement.

     17.9      Governing Law. This Agreement shall be governed by and construed under the Laws of the State of Texas, excluding any choice of law rules which may direct the application of the Laws of another jurisdiction. This provision survives termination of this Agreement.

     17.10      No Partnership Created. It is not the purpose or intention of this Agreement to create (and it shall not be construed as creating) a joint venture, partnership or any type of association, and the parties are not authorized to act as agent or principal for each other with respect to any matter related hereto.

     17.11      Public Announcements. Neither the Seller Group nor the Buyer Group (as defined in Article 8) shall issue a public statement or press release with respect to the transaction contemplated herein (including the price and other terms) without the prior written consent of the other party, except as required by Law or listing agreement with a national security exchange and then only after prior consultation with the other party.

     17.12      No Third Party Beneficiaries. Nothing contained in this Agreement shall entitle anyone other than Seller or Buyer or their authorized successors and assigns to any claim, cause of action, remedy or right of any kind whatsoever.

     17.13      Deceptive Trade Practices. As partial consideration for the parties agreeing to enter into this Agreement, the parties each can and do expressly waive the provisions of all consumer protection Laws of the State of Texas, or any other state, applicable to this transaction that may be waived by the parties; it is not the intent of the parties to waive and the parties shall not waive any applicable Law or provision thereof which is prohibited by Law from being waived. Each party represents to the other that such party has had an adequate opportunity to review the preceding waiver provision, including the opportunity to submit the same to legal counsel for review and comment, and understands the rights being waived herein.

     17.14      Tax Deferred Exchange Election. Either party may elect to structure the conveyance of the Properties as part of an exchange under Article 1031 of the Internal Revenue Code of 1986, as amended. The parties agree to execute all documents, conveyances or other instruments necessary to effectuate an exchange. The party requesting that the transaction be structured as a tax free exchange shall be responsible for all additional costs associated with so structuring the transaction.

     17.15      Not to be Construed Against Drafter. The parties acknowledge that they have had an adequate opportunity to review each and every provision contained in this

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Agreement and to submit the same to legal counsel for review and comment, including expressly but without limitation the waivers and indemnities in Articles 4, 6, 8, 9, and 17. Based on said review and consultation, the parties agree with each and every term contained in this Agreement. Based on the foregoing, the parties agree that the rule of construction that a contract be construed against the drafter, if any, shall not be applied in the interpretation and construction of this Agreement.

     17.16      Entire Agreement. This Agreement supersedes all prior negotiations, understandings, letters of intent and agreements (whether oral or written) and any contemporaneous oral agreements between the parties relating to the Properties and constitutes the entire understanding and agreement between the parties with respect to the sale and purchase of the Properties.

     17.17      Conspicuousness of Provisions. The parties acknowledge that the provisions contained in this Agreement that are set out in “bold” satisfy the requirement of the express negligence rule and any other requirement at law or in equity that provisions contained in a contract be conspicuously marked or highlighted.

     17.18      Execution in Counterparts. This Agreement may be executed in counterparts, which shall when taken together constitute one valid and binding agreement. Execution of this Agreement via facsimile shall be effective, and signatures received via facsimile shall be binding upon the parties hereto and shall be effective as originals.

     The parties have executed this Agreement on the day and year first set forth above.

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