Cimarex Energy Co. is an independent oil and gas exploration and production company. The Company operates in exploration and production (E&P) segment. Its operations are located in Oklahoma, Texas and New Mexico. Its E&P activities take place primarily in two areas: the Permian Basin and the Mid-Continent region. Its Permian Basin region encompasses west Texas and southeast New Mexico. Its Mid-Continent region consists of Oklahoma and the Texas Panhandle. As of fiscal year ended December 31, 2016 (fiscal 2016), its activities in the Mid-Continent were focused in the Woodford shale and the Meramec horizon, both in Oklahoma. During fiscal 2016, production from the Mid-Continent averaged 457 millions of cubic feet equivalent (MMcfe) per day, or 47% of total company production. All of the Company's oil and gas assets are located in the United States. As of December 31, 2016, 63% of its total proved reserves were located in the Mid-Continent region and 37% were in the Permian Basin.