EXHIBIT 23.15


                           CONSENT OF UBS WARBURG LLC



     We hereby consent to the use of our opinion letter dated August 13, 2001 to
the Board of Directors of Devon Energy Corporation ("Devon") included as Annex F
to the Joint Proxy Statement/Prospectus which forms a part of the Registration
Statement on Form S-4 dated October 29, 2001 relating to the proposed merger of
Devon and Mitchell Energy & Development Corp. and references to such opinion in
such Joint Proxy Statement/Prospectus. In giving such consent, we do not admit
that we come within the category of persons whose consent is required under
Section 7 of the Securities Act of 1933, as amended, or the rules and
regulations of the Securities and Exchange Commission thereunder, nor do we
thereby admit that we are experts with respect to any part of such Registration
Statement within the meaning of the term "Experts" as used in the Securities Act
of 1933, as amended, or the rules and regulations of the Securities and Exchange
Commission thereunder.


UBS WARBURG LLC


By: /s/ JAMES BRENNAN
    ---------------------
        James Brennan
        Managing Director



New York, New York
October 29, 2001