EX-23.1 3 0003.txt CONSENT OF ARTHUR ANDERSON LLP Exhibit 23.1 CONSENT OF INDEPENDENT ACOUNTANTS As independent public accountants, we hereby consent to the incorporation into this Form S-8 Registration Statement of our report dated February 24, 2000 included in Key Production Company Inc.'s From 10-K for the year ended December 31, 1999 and to all references to our Firm included in this Registration Statement. Arthur Andersen LLP Denver, Colorado January 2, 2001