LOS ANGELES, Aug. 23, 2004 (PRIMEZONE) -- Occidental Petroleum Corporation (NYSE:OXY) today received information that the Government of Ecuador is considering the initiation of proceedings to terminate Occidental's Participation Contract for Block 15, based on an assertion that the company has breached the agreement. Occidental believes that it has complied with all material obligations under the Participation Contract and intends to present its position to the appropriate Ecuadorian officials at forthcoming meetings.

Occidental began oil producing operations in Ecuador's Block 15 in 1985. Occidental's Ecuadorian operations represent approximately 8 percent of the company's current worldwide production, approximately 4 percent of its proved reserves and approximately 2 percent of the company's total property, plant and equipment, net of accumulated depreciation, depletion and amortization.

Occidental Petroleum Corporation
 Lawrence P. Meriage (media)
   310-443-6562
 Kenneth J. Huffman (investors)
   212-603-8183