Brigham Exploration Company engages in the exploration, development, and production of oil and natural gas in the United States. The company owns property interests in the Onshore Gulf Coast consisting of the Vicksburg trend in Brooks County, Texas; the Frio trend in and around Matagorda County, Texas; and joint venture interests in southern Louisiana. Brigham Exploration also holds interests in Hunton Trend and Granite Wash Trend in the Anadarko Basin; Powder River Basin and Williston Basin in the Rocky Mountains; and west Texas. As of December 31, 2006, it had 146.5 billion cubic feet of natural gas equivalent of total estimated, proved reserves. The company sells its oil and natural...