Exhibit 4.8FIRST AMENDMENT TO WARRANT AGREEMENT     This First Amendment to Warrant Agreement (this “Amendment”), dated as ofFebruary 22, 2007, is made and entered into by and between Parallel Petroleum Corporation, aDelaware corporation (the “Company”), and Computershare Shareholder Services,Inc., a Delaware corporation (the “Warrant Agent”), and its fully owned subsidiaryComputershare Trust Company, N.A., a federally chartered trust company.     WHEREAS, the Company and the Warrant Agent’s predecessor, American Stock Transfer, Inc.,entered into that certain Purchase Warrant Agreement, dated as of October 1, 1980 (the “WarrantAgreement”);     WHEREAS, under and in accordance with the terms of the Company’s final prospectus, datedOctober 1, 1980 (the “Prospectus”), the Company completed its initial public offering (the“Offering”) of shares of common stock and warrants to purchase common stock;     WHEREAS, in connection with the closing of the transactions contemplated by the Offering, theCompany issued and sold a total of 3,000,000 warrants at an exercise price of $.60 per share which,after giving effect to the Company’s one-for-ten reverse stock split effective on August 6, 1982,are now 300,030 warrants having an exercise price of $6.00 per share (the “Warrants”);     WHEREAS, the Prospectus provides that each outstanding Warrant could be exercised to purchaseone share of the Company’s common stock commencing nine months after the Offering was closed, or onsuch later date as a registration statement covering such exercise is declared effective by theSecurities and Exchange Commission, but for a period of 30 days only;     WHEREAS, the Warrant Agreement provides that each Warrant could be exercised at any time on orafter August 21, 1981, but not after September 30, 1981, upon the terms and subject to theconditions set forth in the Warrant Agreement and in such Warrant;     WHEREAS, the Company and the Warrant Agent desire to amend the Warrant Agreement, pursuant tothe provisions of Section 10 thereof, to more accurately reflect the intent of the original partiesthereto and to cure and correct the ambiguity and inconsistency between (a) the terms of exerciseof the Warrants as contained and described in the Prospectus, and (b) the terms of exercise of theWarrants as contained and described in the Warrant Agreement.     NOW, THEREFORE, in consideration of the foregoing and the mutual covenants and agreementscontained herein and other good and valuable consideration, the receipt and adequacy of which arehereby acknowledged, the parties hereto agree as follows:     Section 1. Definitions. Except as otherwise expressly provided herein, allcapitalized terms used but not defined herein shall have the same meanings as given them in theWarrant Agreement.     Section 2. Amendment of Section 4. The first sentence of Section 4 of theWarrant Agreement is hereby amended to read in its entirety as follows:     Section 4. Exercise. Each Warrant represented by a WarrantCertificate may be exercised at any time or from time to time at or after such dateas a registration statement covering exercise thereof is declared effective by theSecurities and Exchange Commission, but only for a thirty-day period after suchdate, upon the terms and subject to the conditions set forth herein and in suchWarrant Certificate.
 

 
     Section 3. Miscellaneous.     3.1 Ratification. Except as expressly amended hereby, the Warrant Agreement is andshall be unchanged and all of the terms, provisions, covenants, conditions, schedules and exhibitsthereof shall remain and continue in full force and effect and are hereby ratified and confirmed bythe Company and the Warrant Agent.     3.2 Legal Expenses. The Company hereby agrees to pay on demand all reasonable feesand expenses of counsel to the Warrant Agent incurred by the Warrant Agent in connection with thepreparation and execution of this Amendment and all related documents.     3.3 Multiple Counterparts. Multiple counterparts of this Amendment may be signed bythe parties hereto (including by facsimile transmission), each of which shall be an original butall of which together shall constitute one and the same instrument.     3.4 Governing Law. This Amendment shall be governed by and construed in accordancewith the laws of Delaware.     IN WITNESS WHEREOF, the Borrower and the Lender have caused this instrument to be effective asof the date first above written.COMPANY:                       PARALLEL PETROLEUM CORPORATION