Exhibit 2.2

[EXECUTION COPY]

SECOND AMENDMENT TO PURCHASE AND SALE AGREEMENT

This Second Amendment to Purchase and Sale Agreement dated as of December 18, 2007 (this “Amendment”) is by and among Ambrose Energy I, Ltd., and each of the other parties which are listed as a party Seller on the signatures pages hereof and which execute a counterpart of this Amendment (all of the foregoing described parties are referred to collectively as “Seller” or “Parties Seller” and individually as a “Party Seller”), Windsor Permian LLC (“Buyer”) and Gulfport Energy Corporation (“Gulfport”).

Seller and Buyer entered into that certain Purchase and Sale Agreement dated as of November 28, 2007, and subsequently entered into that certain First Amendment to Purchase and Sale Agreement dated as of December 3, 2007, pursuant to which Seller has agreed to sell to Buyer the Assets, as defined therein, subject to the terms and conditions therein (collectively, the “Purchase Agreement”).

Buyer and Gulfport entered into that certain Assignment of Contract Rights dated December 12, 2007 pursuant to which Buyer assigned to Gulfport a 50% interest in Buyer’s right, title and interest in the Purchase Agreement (the “Buyer Assignment”).

NOW, THEREFORE, for good and valuable consideration, the receipt and sufficiency of which are hereby acknowledged, Buyer, Seller and Gulfport agree as follows:

1. Gulfport ratifies, affirms and approves the Purchase Agreement and is hereby added as a “Buyer” thereto such that Windsor Permian LLC and Gulfport Energy Corporation, for purposes of the Purchase Agreement and this Amendment, are hereinafter referred to collectively as “Buyer” or “Parties Buyer” and individually as a “Party Buyer.”

2. Seller consents to the Buyer Assignment and the addition of Gulfport as a Buyer or Party Buyer as set forth herein; provided, however, that notwithstanding anything contained in this Amendment such consent and the Buyer Assignment shall not relieve Windsor Permian LLC of any of its original obligations under the Purchase Agreement, including without limitation, its original obligations under Section 10.08 and Section 13.01 of the Purchase Agreement.

3. Section 6.01 of the Purchase Agreement is hereby amended in its entirety to read as follows:

Section 6.01 Representations and Warranties. Each Party Buyer represents and warrants to Seller, severally with respect to itself only and not with respect to any other Party Buyer, that:

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5. Section 19.11 of the Purchase Agreement is hereby amended by adding at the end thereof the following:

6. Section 19.18 of the Purchase Agreement is hereby amended in its entirety to read as follows:

Section 19.18 Several Not Joint; Obligations and Rights of Parties. The obligations of Parties Seller and the Parties Buyer with respect to the Assets are several (and not joint and several) with respect to the working interests owned by each Party Seller, or to be acquired by each Party Buyer, in the Assets (excepting Windsor Permian LLC’s obligations under Section 10.08 and Section 13.01 hereof). Without limitation of the foregoing, any representation, warranty, indemnity or covenant made by Seller or the Parties Seller or any Party Seller herein or pursuant hereto, with respect to the Assets is only made by each Party Seller as to itself only or its interest in such Assets, as applicable. Without limitation of the foregoing, any representation, warranty, indemnity or covenant made by Buyer or the Parties Buyer or any Party Buyer herein or pursuant hereto is only made by each Party Buyer as to itself only or its interest to be acquired in such Assets, as applicable (excepting Windsor Permian LLC’s obligations under Section 10.08 and Section 13.01 hereof).

7. A new Section 19.20 of the Purchase Agreement shall be added to read as follows:

Section 19.20 Buyer’s Representative. Both of the Parties Buyer hereby appoint Windsor Permian LLC to serve as their exclusive representative and agent (“Buyers’ Representative”) under this Agreement for the limited purpose of (i) prior to the Closing, exercising and performing, on their behalf, those rights and duties that are expressly designated herein as a right or duty of Buyer, (ii) prior to the Closing, giving notices and requests under this Agreement, and (iii) making of adjustments to the Purchase Price. Seller may act, and shall be fully protected in acting, in reliance upon any and all acts and things done and performed by or agreements made by the Buyers’ Representative with respect to the foregoing described matters on behalf of the Parties Buyer as fully and effectively as though each had done, performed, made or executed the same; provided, however for purposes of clarity at Closing an undivided 50% interest in the Assets shall be conveyed by the Parties Seller to each Party Buyer.

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8. Capitalized terms used herein and not otherwise defined shall have the meanings given to them in the Purchase Agreement. Except as amended herein, the terms of the Purchase Agreement shall remain unchanged and in full force and effect.

9. This Amendment may be executed in one or more separate counterparts, each of which shall be deemed an original but all of which together shall constitute one and the same instrument. All signatures of the parties to this Amendment may be transmitted by facsimile, and such facsimile will, for all purposes, be deemed to be the original signature of and be binding upon such party.

[SIGNATURE PAGES TO FOLLOW]

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This Amendment is executed as of the date first set forth above.

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