Occidental Petroleum Corp. operates as an international oil and gas exploration company. It operates through the following segments: Oil and Gas, Chemical, and Midstream and Marketing. The Oil and Gas segment explores for, develops and produces oil and condensate, natural gas liquids and natural gas. The Chemical segment manufactures and markets basic chemicals and vinyls. The Midstream and Marketing segment gathers processes, transports, stores, purchases and markets oil, condensate, NGLs, natural gas, carbon dioxide and power. It also trades around its assets, including transportation and storage capacity. The company was founded in 1920 and is headquartered in Houston, TX.