Exhibit 99.1

                                Certification of
                             Chief Executive Officer
                        of Mission Resources Corporation

This certification is provided pursuant to Section 906 of the Sarbanes-Oxley Act
of 2002, 18 U.S.C. ss. 1350, and accompanies the quarterly report on Form 10-Q
(the "Form 10-Q") for the quarter ended September 30, 2002 of Mission Resources
Corporation (the "Issuer").

I, Robert L. Cavnar, the Chief Executive Officer of the Issuer, certify that:

     (i)  the Form 10-Q fully complies with the requirements of section 13(a) or
          section 15(d) of the Securities Exchange Act of 1934 (15 U.S.C. 78m(a)
          or 78o(d)); and

     (ii) the information contained in the Form 10-Q fairly presents, in all
          material respects, the financial condition and results of operations
          of the Issuer.

Dated:  November 13, 2002

                              /s/ Robert L. Cavnar


Subscribed and sworn to before me
this 13th day of November, 2002


/s/    Carmen M. Garcia

Notary Public in and for the
State of Texas

My commission expires: