There's more than only a patch of oil for Apache. The oil and gas exploration and production company has onshore and offshore operations in major oil patches around the world, including in North America as well as in Australia, Egypt, and the UK North Sea. In North America it is active in the Gulf of Mexico, the Gulf Coast of Texas and Louisiana, the Permian Basin in West Texas, the Anadarko Basin in Oklahoma, and Canada's Western Sedimentary Basin. In 2015 the company reported worldwide estimated proved reserves of 1.6 billion barrels of oil equivalent. That year, Anadarko Petroleum made a bid to acquire the financially embattled Apache, which the company rebuffed.