Coalinga Oil Field
The Coalinga Oil Field is a large oil field in western Fresno County, California, in the United States. It surrounds the town of Coalinga, about halfway between Los Angeles and San Francisco, to the west of Interstate 5, at the foot of the Diablo Range. Discovered in the late 19th century, it became active around 1890, and is now the eighth-largest oil field in California, with reserves totaling approximately 58 million barrels (9,200,000 m3), over 1,600 active oil wells, and having a cumulative production of 1,014 million barrels (161,200,000 m3). It is one of California's six billion barrel fields, the others being Midway-Sunset Oil Field, Wilmington Oil Field, Kern River Oil Field, South Belridge Oil Field, and Elk Hills Oil Field. The principal operators on the field, as of 2008, were Chevron Corp. (formerly Standard Oil of California or SoCal) and Aera Energy LLC.