Rex Energy Corporation is an independent oil and gas company operating in the Appalachian Basin and Illinois Basin. In the Appalachian Basin, the Company is focused on its Marcellus Shale drilling projects and Utica Shale and Upper Devonian Shale exploration activities. In the Illinois Basin, it is focused on the implementation of enhanced oil recovery on its properties, as well as conventional oil production. As of December 31, 2011, it operated approximately 2,117 wells, which include approximately 517 disposal and injection wells. During the year ended December 31, 2011, it produced an average of 49.2 net million cubic feet equivalent per day, composed of approximately 69.5% natural gas and 30.5% oil and natural gas liquids (NGLs). During 2011, it drilled 64.0 gross (34.2 net) wells, which includes one gross (one net) well drilled in connection with its Lawrence Field ASP Flood Project. In September 2014, Rex Energy Corp completes Butler Operated Area Acquisition.