POWER OF ATTORNEY

     Know all by these presents, that the undersigned hereby constitutes and
appoints Robert K. Reeves, Amanda M. McMillian, Anne V. Bruner and
Karen S. Augustin signing singly, the undersigned's true and lawful
attorney-in-fact to:

     1.   execute for and on behalf of the undersigned, in the undersigned's
          capacity as a director of Anadarko Petroleum Corporation (the
          "Company"), Forms ID, 3, 4 and 5, pursuant to Section 16(a) of the
          Securities Exchange Act of 1934 and the rules thereunder, and Form
          144, pursuant to Rule 144 under the Securities Act of 1933 and the
          rules thereunder, if required; and

     2.   do and perform any and all acts for and on behalf of the
          undersigned which may be necessary or desirable to complete and
          execute any such Form 3, Form 4, Form 5 or Form 144 and timely file
          such form with the United States Securities and Exchange Commission
          and any stock exchange or similar authority; and

     3.   take any other action of any type whatsoever in connection with
          the foregoing which, in the opinion of such attorney-in-fact, may be
          of benefit to, in the best interest of, or legally required by, the
          undersigned, it being understood that the documents executed by such
          attorney-in-fact on behalf of the undersigned pursuant to this Power
          of Attorney shall be in such form and shall contain such terms and
          conditions as such attorney-in-fact may approve in such attorney-in-
          fact's discretion.

     The undersigned hereby grants such attorney-in-fact full power and
authority to do and perform any and every act and thing whatsoever requisite,
necessary or proper to be done in the exercise of any of the rights and powers
herein granted, as fully to all intents and purposes as the undersigned might or
could do if personally present, with full power of substitution or revocation,
hereby ratifying and confirming all that such attorney-in-fact shall lawfully do
or cause to be done by virtue of this power of attorney and the rights and
powers herein granted. The undersigned acknowledges that the foregoing attorney-
in-fact, in serving in such capacity at the request of the undersigned, is not
assuming, nor is the Company assuming, any of the undersigned's responsibilities
to comply with Section 16(a) of the Securities Exchange Act of 1934 or Rule 144
of the Securities Act of 1933.

     This Power of Attorney shall remain in full force and effect until the
undersigned is no longer a director of the Company unless earlier revoked by the
undersigned in a signed writing delivered to the foregoing attorneys-in-fact;
provided, however, this Power of Attorney will expire immediately upon the
termination of directorship of any attorney-in- fact as to that attorney-in-fact
only, but not as to any other appointed attorney-in-fact hereunder.

     IN WITNESS WHEREOF, the undersigned has caused this Power of Attorney to be
executed as of this 2nd day of September 2015.


                                  Name: /s/ Sean William Joseph Gourley
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