EXHIBIT 99.1

                    CERTIFICATE OF THE CHAIRMAN OF THE BOARD
                           AND CHIEF EXECUTIVE OFFICER
                    OF HARKEN ENERGY CORPORATION (REGISTRANT)

         Pursuant to Section 906 of the Sarbanes-Oxley Act of 2002 (18 U.S.C.(S)
1350):

         I, Mikel D. Faulkner,  Chief Executive  Officer of the Registrant,
certify to the best of my knowledge and belief pursuant to Section 906 of
Sarbanes-Oxley Act of 2002 (18 U.S.C.(S) 1350) that:

         (1)      The Quarterly Report on Form 10-Q for the period ended
                  March 31, 2002, which this statement accompanies, fully
                  complies with the requirements of section 13(a) or 15(d) of
                  the Securities Exchange Act of 1934; and

         (2)      The information contained in the Quarterly Report on Form 10-Q
                  fairly presents, in all material respects, the financial
                  condition and result of operations of the Registrant.

Date:  December 20, 2002
                                                    /s/ Mikel D. Faulkner
                                                    ----------------------------
                                                    Chief Executive Officer