POWER OF ATTORNEY
                               -----------------

Know all by those present, that the undersigned hereby constitutes and appoints
each of Donald P. de Brier, Christel H. Pauli and Linda S. Peterson, 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 an officer and/or director of
          Occidental Petroleum Corporation (the "Company"), Forms 3, 4 and
          5 in accordance with Section 16(a) of the Securities Exchange Act
          of 1934 and the rules thereunder;

     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, 4 and 5 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 to each 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 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, or such
attorney-in-fact's substitute or substitutes, 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 ATTORNEYS-IN-FACT, IN
SERVING IN SUCH CAPACITY AT THE REQUEST OF THE UNDERSIGNED, ARE NOT ASSUMING,
NOR IS THE COMPANY ASSUMING, ANY OF THE UNDERSIGNED'S RESPONSIBILITIES TO COMPLY
WITH SECTION 16 OF THE SECURITIES EXCHANGE ACT OF 1934.

This Power of Attorney shall remain in full force and effect until the
undersigned is no longer required to file Forms 3, 4 and 5 with respect to the
undersigned's holdings of and transactions in securities issued by the Company,
unless earlier revoked by the undersigned in a signed writing delivered to the
foregoing attorneys-in-fact.

IN WITNESS WHEREOF, the undersigned has caused this Power of Attorney to be
executed as of this 23rd day of April, 2012.


                                        /s/ JOHN C. ALE
                                        ---------------------------
                                        John C. Ale