Quicksilver Resources Inc. is an independent oil and gas company engaged primarily in the acquisition, exploration, development and production of onshore oil and gas in North America and are based in Fort Worth, Texas. The Company is focused primarily on unconventional reservoirs where hydrocarbons may be found in geological conditions, such as fractured shales and coalbeds. Its producing oil and gas properties in the United States are principally located in Texas, Colorado, Wyoming and Montana, and in Canada in Alberta and British Columbia. The Company�s three core areas include Barnett Shale, Horn River and Horseshoe Canyon. It also has exploration opportunities in North America in Midland and Delaware basins in West Texas and Sand Wash Basin in northwest Colorado regions. In May 2014, the Company closed the sale to Southwestern Energy Production Company of its jointly owned holdings with SWEPI LP (Shell) in the Sand Wash Basin.