Exhibit 10.2 AMENDMENT TO REGISTRATION RIGHTS AGREEMENT This Amendment to Registration Rights Agreement (the "Amendment") dated as of October 19, 1999, is entered into by and among MIDDLE BAY OIL COMPANY, INC., an Alabama corporation ("Corporation"), 3TEC Energy Company L.L.C., a Delaware limited liability company f/k/a 3TEC Energy Corporation, Shoemaker Family Partners, L.P., Shoeinvest II, LP, and The Prudential Insurance Company of America, a New Jersey corporation ("Prudential"). RECITALS WHEREAS, on August 27, 1999, the Corporation, 3TEC Energy Company L.L.C. f/k/a 3TEC Energy Corporation; Kaiser-Francis Oil Company; C.J. Lett, III; Weskids, L.P.; Alvin V. Shoemaker; Shoemaker Family Partners, L.P.; and Shoeinvest II, LP entered into a certain Registration Rights Agreement (the "Agreement"); and. WHEREAS, the parties hereto wish to amend the Agreement to add Prudential as a party to the Agreement and as a Shareholder as defined in the Agreement. NOW, THEREFORE, in consideration of the mutual promises contained herein and other good and valuable consideration, the receipt and sufficiency of which are hereby acknowledged, the parties hereto agree as follows: 1. ADDITION OF PRUDENTIAL AS A SHAREHOLDER. Prudential is hereby added as a party to the Agreement and shall be considered a Shareholder as defined in the Agreement. 2. SCHEDULE 1. Schedule 1 of the Agreement is hereby deleted in its entirety and replaced with Schedule 1 attached hereto. 3. TERMS DEFINED IN AGREEMENT. As used herein, each term defined in the Agreement shall have the meaning assigned thereto in the Agreement, unless expressly provided herein to the contrary. 4. FULL FORCE AND EFFECT. Except with respect to the changes made in this Amendment, the terms and provisions of the Agreement are in full force and effect. 5. NOTICES. Any notice to be given by any party hereunder to any other shall be in writing, mailed by certified or registered mail, return receipt requested, and shall be addressed to the other parties at the addresses listed on the signature pages hereof. All such notices shall be deemed to be given three (3) days after the date of mailing thereof. 6. BINDING EFFECT. This Amendment shall be binding upon the parties hereto and their respective successors, personal representatives and permitted assigns. 7. COUNTERPARTS. This Amendment may be executed in one or more counterparts, each of which shall constitute an original and all of which together shall constitute but one and the same instrument. (REMAINDER OF PAGE INTENTIONALLY LEFT BLANK) IN WITNESS WHEREOF, the parties have executed this Amendment as of the date first above written. "CORPORATION" MIDDLE BAY OIL COMPANY, INC. By: /s/ Floyd C. Wilson Name: Floyd C. Wilson Title: President and Chief Executive Officer Address for Notice: Middle Bay Oil Company, Inc. 1221 Lamar Street, Suite 1020 Houston, TX 77010 Fax: (713) 650-0352 "SHAREHOLDERS" 3TEC ENERGY COMPANY L.L.C By: /s/ Floyd C. Wilson Name: Floyd C. Wilson -------------------------------- Title: Managing Director -------------------------------- Address for Notice: 3TEC Energy Company L.L.C. 5910 N. Central Expressway Suite 1150 Dallas, TX 75206 Fax: (214) 373-9731 SHOEMAKER FAMILY PARTNERS, LP By: Alvin V. Shoemaker Its General Partner By: /s/ Alvin V. Shoemaker Name: Alvin V. Shoemaker Title: General Partner Address for Notice: Shoemaker Family Partners, LP 60 Brushhill Road Kinnelon, NJ 07405 Fax: (310) 444-3833 SHOEINVEST II, LP By: Alvin Shoemaker Investments, Inc. Its General Partner By: /s/ Alvin V. Shoemaker Name: Alvin V. Shoemaker Title: General Partner Address for Notice: Shoeinvest II, LP 60 Brushhill Road Kinnelon, NJ 07405 Fax: (310) 444-3833 THE PRUDENTIAL INSURANCE COMPANY OF AMERICA By: /s/ Ric E. Abel Name: Ric E. Abel Title: Vice President Address for Notice: The Prudential Insurance Company of America c/o Prudential Capital Group 2200 Ross Avenue, Suite 4200E Dallas, Texas 75201 Fax: (214) 720-6299 Attn.: Managing Director SCHEDULE 1 3TEC Energy Company L.L.C., f/k/a 3TEC Energy Corporation Securities Purchase Agreement by and between 3TEC Energy Corporation and Middle Bay OilCompany, Inc., dated July 1, 1999 4,755,556 shares of Common Stock Warrants exercisable for 3,600,000 shares of Common Stock $10,700,000 Note (which is convertible to Conversion Shares) Shoemaker Family Partners, LP Securities Purchase Agreement by and between Shoemaker Family Partners, LP and Middle Bay Oil Company, Inc., dated August 27, 1999 22,222 shares of Common Stock Warrants exercisable for 16,822 shares of Common Stock $50,000 Note (which is convertible to Conversion Shares) Shoeinvest II, LP Securities Purchase Agreement by and between Shoeinvest II, LP and Middle Bay Oil Company, Inc., dated August 27, 1999 44,444 shares of Common Stock Warrants exercisable for 33,644 shares of Common Stock $100,000 Note (which is convertible to Conversion Shares) The Prudential Insurance Company of America Securities Purchase Agreement by and between The Prudential Insurance Company of America and Middle Bay Oil Company, Inc., dated October 19, 1999 1,055,042 shares of Common Stock Warrants exercisable for 798,677 shares of Common Stock $2,373,844 Note (which is convertible to Conversion Shares)