EX-99 2 mm9-1206_sc13de991.txt JOINT FILIONG AGREEMENT Exhibit 1 JOINT FILING AGREEMENT This will confirm the agreement by and among all the undersigned that the Schedule 13D filed on or about this date and any amendments thereto with respect to beneficial ownership by the undersigned of shares of Common Stock, par value $.01 per share, of Geokinetics Inc. is being filed on behalf of each of the undersigned in accordance with Rule 13d-1(k)(1) under the Securities Exchange Act of 1934. This agreement may be executed in counterparts, each of which shall be deemed an original, but all of which together shall constitute one and the same instrument. September 12, 2006 AVISTA CAPITAL PARTNERS, L.P. By: AVISTA CAPITAL PARTNERS GP, LLC, its general partner By: /s/ Ben Silbert --------------------------------- Ben Silbert General Counsel AVISTA CAPITAL PARTNERS (OFFSHORE), L.P. By: AVISTA CAPITAL PARTNERS GP, LLC, its general partner By: /s/ Ben Silbert --------------------------------- Ben Silbert General Counsel AVISTA CAPITAL PARTNERS GP, LLC By: /s/ Ben Silbert --------------------------------- Ben Silbert General Counsel