Occidental Petroleum Corporation engages in the acquisition, exploration, and development of oil and gas properties in the United States and internationally. The company operates in three segments: Oil and Gas; Chemical; and Midstream, Marketing and Other. The Oil and Gas segment explores for, develops, and produces oil and condensate, natural gas liquids (NGLs), and natural gas. Its domestic oil and gas operations are located in Colorado, New Mexico, North Dakota, and Texas; and international oil and gas operations are located in Bahrain, Bolivia, Colombia, Iraq, Libya, Oman, Qatar, the United Arab Emirates, and Yemen. The Chemical segment manufactures and markets basic chemicals, including chlorine, caustic soda, chlorinated organics, potassium chemicals, ethylene dichloride, chlorinated isocyanurates, sodium silicates, and calcium chloride; vinyls comprising vinyl chloride monomer and polyvinyl chloride; and other chemicals, such as resorcinol. The Midstream, Marketing and Other segment gathers, processes, transports, stores, purchases, and markets oil, condensate, NGLs, natural gas, carbon dioxide, and power. This segment also trades around its assets consisting of transportation and storage capacity, as well as oil, NGLs, gas, and other commodities. The company was founded in 1920 and is headquartered in Houston, Texas.