Chesapeake Energy Corp is a US-based exploration and production company. It is engaged in the acquisition, exploration, and development of properties for the production of oil, natural gas and natural gas liquids from underground reservoirs. Geographically, the company focuses its exploration, development, acquisition and production efforts in the operating areas of Marcellus, Northern Appalachian Basin in Pennsylvania; Haynesville, Northwestern Louisiana and East Texas (Gulf Coast); Eagle Ford, South Texas; Utica, Southern Appalachian Basin in Ohio; Mid-Continent, Anadarko Basin in northwestern Oklahoma; and Powder River Basin, Stacked pay in Wyoming.Chesapeake Energy Corp is a natural gas and oil exploration, development, acquisition and production company. It also owns an oil and natural gas marketing business. Its portfolio includes unconventional oil and natural gas assets in U.S. onshore plays.