The Lompoc Oil Field is a large oil field in the Purisima Hills north of Lompoc, California, in Santa Barbara County. Discovered in 1903, two years after the discovery of the Orcutt Oil Field in the Solomon Hills, it is one of the oldest oil fields in northern Santa Barbara County, and one of the closest to exhaustion, reporting only 1.7 million barrels (270,000 m³) of recoverable oil remaining out of its original 50 million barrels (7,900,000 m³) as of the end of 2008. Its sole operator as of 2009 was Houston, Texas-based Plains Exploration & Production.