news releases

Occidental to Hold Earnings Conference Call

LOS ANGELES, July 10, 2007 -- Occidental Petroleum Corporation (NYSE:OXY) will hold a conference call on Tuesday, July 24, 2007, following the release of its second quarter 2007 financial results. The conference call, which will begin at 11:30 a.m. EDT, may be accessed by calling 1-888-873-8496. The conference call also can be heard live on the company's website, www.oxy.com.

All remarks made during the conference call will be current at the time of the call and will not be updated to reflect subsequent material developments.

Second quarter financial results will be available through the Investor Relations section of the company's website concurrent with the SEC filing. An archived edition of the conference call also will be available on the website within several hours after the call is completed.

ABOUT OXY

Occidental Petroleum Corporation is an international oil and gas exploration and production company with operations in the United States, Middle East/North Africa and Latin America regions. Oxy is the fourth largest U.S. oil and gas company, based on equity market capitalization. Oxy's wholly owned subsidiary, OxyChem, manufactures and markets chlor-alkali products and vinyls. Occidental is committed to safeguarding the environment, protecting the safety and health of employees and neighboring communities and upholding high standards of social responsibility in all of the company's worldwide operations.

CONTACT:   Occidental Petroleum Corporation
           Media
           Richard S. Kline 
             richard_kline@oxy.com
             310-443-6249
           Investors
           Chris Stavros 
             chris_stavros@oxy.com
             212-603-8184
           On the web: www.oxy.com