Quicksilver Resources Inc. (Quicksilver) is an independent oil and gas company engaged primarily in the acquisition, exploration, development and production of onshore oil and gas in North America. The Company focuses primarily on unconventional reservoirs. It operates in two geographic segments: the U.S. and Canada. 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. As of December 31, 2011, the Company had total proved reserves of approximately 2.8 trillion cubic feet equivalent (Tcfe). Its production and development operations are concentrated in its three core areas: the Barnett Shale, Horn River and Horseshoe Canyon. During the year ended December 31, 2011, the Company had total production of 150.5 billions of cubic feet equivalent.