EXHIBIT 23 CONSENT OF INDEPENDENT PUBLIC ACCOUNTANTS As independent public accountants, we hereby consent to the incorporation by reference of our report, dated February 8, 2002, appearing in Occidental Petroleum Corporation's Annual Report on Form 10-K for the year ended December 31, 2001, into Occidental Petroleum Corporation's previously filed Registration Statements Nos. 33-5487, 33-14662, 33-47636, 33-60492, 33-59395, 33-63991, 33-64719, 333-02901, 333-17879, 333-49207, 333-52053, 333-67385, 333-69303, 333-72719, 333-72721, 333-78031, 333-79613, 333-79541, 333-37970, 333-55404, 333-63444, 333-82246, and 333-83124. ARTHUR ANDERSEN LLP Los Angeles, California March 13, 2002