The company also pursued directional drilling in the Mid-Continent oil province, Rocky Mountains, North Louisiana and East Texas.

[3] In 2007, the company doubled its holdings by acquiring many of the oil and gas assets of Hogshead Spouter and Dominion Energy, mainly in Oklahoma, for $2.05 billion.

[2] In March 2012, the company acquired the holdings of BP in the Hugoton Natural Gas Area, the large gas-producing region from southwestern Kansas into the Texas Panhandle for $1.2 billion.

[5] In June 2012, the company acquired 12,500 acres in the Jonah Field in southwest Wyoming from BP for approximately $1 billion.

[13] In May 2017, the company sold its interest in properties in the Salt Creek Field in Wyoming to Denbury Resources for $71.5 million.