Evolution Petroleum Corp is an independent oil and gas company operating in the United States. It is engaged predominantly in the acquisition, exploitation, and development of properties for the production of crude oil and natural gas, onshore in the United States. The company's revenues are generated from its crude oil, natural gas, and NGL production from the Jonah Field in Sublette County, Wyoming; the Williston Basin in North Dakota; the Barnett Shale located in North Texas; the Hamilton Dome Field in Wyoming; and the Delhi Field in Northeast Louisiana.