Chesapeake Energy Corporation produces natural gas, oil and natural gas liquids (NGL) in the United States. It operates in two segments: Exploration and Production, and Marketing, Gathering and Compression. Exploration and production is engaged in finding and producing oil, natural gas and NGL. Marketing, gathering and compression is engaged in marketing, gathering and compression of oil, natural gas and NGL. As of December 31, 2016, it owned interests in approximately 22,700 oil and natural gas wells. It has a diverse resource base of onshore the United States unconventional natural gas and liquids assets. It has positions in resource plays of the Eagle Ford Shale in South Texas, the Utica Shale in Ohio, the Anadarko Basin in northwestern Oklahoma and the stacked pay in the Powder River Basin in Wyoming. Its natural gas resource plays are the Haynesville/Bossier Shales in northwestern Louisiana and East Texas and the Marcellus Shale in the northern Appalachian Basin in Pennsylvania.