Anadarko Petroleum Corp. is an independent exploration and production company. It operates through the following segments: Oil and Gas Exploration and Production; Midstream; and Marketing. The Oil and Gas Exploration and Production segment explores and produces natural gas, crude oil, condensate, and natural gas liquids. The Midstream segment engages in gathering, processing, treating, and transportation services to the company and third-party oil and natural gas producers. The Marketing segment sells most of the company's production, as well as production purchased from third parties. It markets oil, natural gas, and natural gas liquids in the United States, Algeria, China and Ghana. The company was founded in 1959 and is headquartered in The Woodlands, TX.