EOG Resources (EOG) 10-Q 2005 Q2 Quarterly report

EXHIBIT 32.1

CERTIFICATION OF PERIODIC REPORT

I, Mark G. Papa, Chairman of the Board and Chief Executive Officer of EOG Resources, Inc., a Delaware Corporation (the "Company"), certify, pursuant to Section 906 of the Sarbanes- Oxley Act of 2002, 18 U.S.C. Section 1350, that:

(1) The Quarterly Report on Form 10-Q of the Company for the quarter ended June 30, 2005 (the "Report") fully complies with the requirements of Section 13(a) or 15(d) of the Securities Exchange Act of 1934 (15 U.S.C. 78m or 78o(d)); and

(2) The information contained in the Report fairly presents, in all material respects, the financial condition and results of operations of the Company.

Date: July 29, 2005

/s/MARK G. PAPA
Mark G. Papa
Chairman of the Board and
Chief Executive Officer
(Principal Executive Officer)