Abraxas Petroleum Corporation, an independent energy company, engages in the acquisition, development, and production of crude oil and natural gas. It primarily operates in the Texas Gulf Coast, the Permian Basin of western Texas, and Wyoming. The company operates in the Portilla field in San Patricio County, the Wilcox in Goliad County; and the Edwards trend in DeWitt and Live Oak Counties in south Texas; and the Delaware Basin in Ward, Reeves, and Pecos Counties, the Eastern Shelf in Scurry, Mitchell, and Coke Counties; and the Midland Basin in Howard, Martin, and Dawson Counties in the Permian Basin of west Texas. Abraxas has interests in the Powder River Basin in Converse and Niobrara Counties in Wyoming. As of January 1, 2005, it had 3,101 thousand barrels of total proved crude oil reserves and 75,118 million cubic feet of natural gas proved reserves. The company was established in 1977 and is based in San Antonio, Texas.