Focusing on US onshore properties, Whiting Petroleum is attracted to the lure of oil and gas plays. The company engages in oil and natural gas exploration and production activities, mainly in the US Permian Basin and Rocky Mountains regions. In 2015 Whiting reported estimated proved reserves of 820.6 million barrels of oil equivalent (of which 83% was oil). That year Whiting produced 163.2 million barrels of oil equivalent per day. The oil and gas company sells oil and gas production to end users, marketers, and other purchasers that have access to nearby pipeline facilities.