Devon Energy Corporation, a U.S.-based oil and gas exploration, development and production company, sold its producing Panyu field located offshore China to China National Offshore Oil Corporation. China National Offshore is a state-owned oil and gas producer in China. In April, Devon Energy said it had agreed to sell its producing Panyu field located offshore China to China National Offshore for $515m. During 2009, Devon's production from the Panyu field was approximately 12 thousand barrels of oil per day.