Exhibit 10.6 FIFTH AMENDMENT TO AMENDED AND RESTATED AGREEMENT OF PARTNERSHIP GEODYNE ENERGY INCOME PRODUCTION PARTNERSHIP I-D This Fifth Amendment to Amended and Restated Agreement of Partnership of Geodyne Energy Income Production Partnership I-D (the "Partnership") is entered into by and between Geodyne Resources, Inc. ("Resources"), a Delaware corporation, as successor Managing Partner, and Geodyne Energy Income Limited Partnership I-D ("Geodyne I-D"), as General Partner. WHEREAS, on December 10, 1985, Geodyne Production Company ("Production"), as Managing Partner, and Geodyne I-D, as General Partner, executed and entered into that certain Agreement of Partnership of PaineWebber/Geodyne Energy Income Production Partnership I-D (the "Preformation Agreement"); and WHEREAS, on March 4, 1986, Production and Geodyne I-D executed and entered into that certain Amended and Restated Agreement of Partnership (the "Agreement"); and WHEREAS, on February 26, 1993, but effective March 1, 1993, Production and Geodyne I-D executed and entered into that certain First Amendment to Amended and Restated Agreement of Partnership (the "Agreement"), whereby it changed (i) the name of the Partnership from "PaineWebber/Geodyne Energy Income Production Partnership I-D" to "Geodyne Energy Income Production Partnership I-D", (ii) the address of the Partnership's principal place of business, and (iii) the address for the Partnership's agent for service of process; and WHEREAS, on July 1, 1996, Production and Geodyne I-D executed and entered into that certain Second Amendment to Agreement, whereby all references in the Agreement to Geodyne Production Company as Managing Partner were amended to reflect, instead, Geodyne Resources, Inc. ("Resources") as Managing Partner; and WHEREAS, on December 30, 1999, Resources and Geodyne I-D executed and entered into that certain Third Amendment to Agreement, whereby all references in the Agreement to "Management Committee" were changed to read "Managing Partner", and whereby the term of the partnership was extended for an additional two years, until December 31, 2001, and WHEREAS, on November 14, 2001, Resources executed and entered into that certain Fourth Amendment to Agreement whereby the term of the partnership was extended for an additional two years, until December 31, 2003; and WHEREAS, Section 10.1 of the Agreement provides that the Managing Partner (as defined in the Agreement) may, without prior notice or consent of any other Partner (as defined in the Agreement), amend any provision of this Agreement if, in its opinion, such amendment does not have a material adverse effect upon the Limited Partnership (as defined in the Agreement); and -1- WHEREAS, Section 2.4 of the Agreement provides that the Partnership shall continue in full force and effect until December 31, 2003, provided that the Managing Partner may extend the term of the Partnership for up to three periods of two years each or until dissolution prior thereto pursuant to the provisions of the Agreement, and WHEREAS, Resources has elected to extend the life of the Partnership an additional two years. NOW, THEREFORE, BE IT RESOLVED that Section 2.4. is hereby amended and restated as follows: The Production Partnership shall continue in force and effect until December 31, 2005, provided that the Managing Partner may extend such term for up to two periods of two years each, or until dissolution prior thereto pursuant to the provisions hereof. IN WITNESS WHEREOF, the parties hereto have hereunto set their hands as of the 18th day of November, 2003. Geodyne Resources, Inc. as Managing Partner By: //s//Dennis R. Neill -------------------------- Dennis R. Neill President Geodyne Energy Income Limited Partnership I-D as General Partner By Geodyne Resources, Inc. General Partner By: //s//Dennis R. Neill -------------------------- Dennis R. Neill President -2-