Aliso Canyon Oil Field

Location of Aliso Canyon Oil Field in southern California
Country	United States
Location	Los Angeles County, California
Offshore/onshore	onshore
Operators	Southern California Gas Company, The Termo Company, Crimson Resource Management Corp.
Field history
Discovery	1938
Start of development	1938
Start of production	1938
Peak year	1955
Production
Current production of oil	566 barrels per day (~28,200 t/a)
Year of current production of oil	2014
Estimated oil in place	1.724 million barrels (~2.352×10^5 t)
Producing formations	Pico Formation, Modelo Formation, Llajas Formation

The Aliso Canyon Oil Field (also Aliso Canyon Natural Gas Storage Field, Aliso Canyon Underground Storage Facility) is an oil field and natural gas storage facility in the Santa Susana Mountains in Los Angeles County, California, north of the Porter Ranch neighborhood of the City of Los Angeles. Discovered in 1938 and quickly developed afterward, the field peaked as an oil producer in the 1950s, but has remained active since its discovery. One of its depleted oil and gas producing formations, the Sesnon-Frew zone, was converted into a gas storage reservoir in 1973 by the Southern California Gas Company, the gas utility servicing the southern half of California. This reservoir is the second-largest natural gas storage site in the western United States, with a capacity of over 86 billion cubic feet of natural gas. Currently it is one of four gas storage facilities owned by Southern California Gas, the others being the La Goleta Gas Field west of Santa Barbara, Honor Rancho near Newhall, and Playa del Rey.

Oil production on the field continues from 32 active wells as of 2016. The gas storage reservoir is accessed through 115 gas injection wells, along with approximately 38 miles of pipeline internal to the field. Three operators were active on the field: Southern California Gas Company, The Termo Company, and Crimson Resource Management Corp.

The field is on the southern slope of the Santa Susana Mountains, an east-west trending range dividing the San Fernando Valley on the south from the Santa Clarita Valley on the north-northeast. With some of its productive wells set at an elevation over 3,000 feet, it is one of the highest and most rugged oil fields in California. The main entrance to the oil field is on Limekiln Canyon Trail where it intersects Sesnon Boulevard. Vehicles must pass a guard station and locked gate to enter.

Land uses in the vicinity of the field include industrial (for the oil and gas field itself), open space, parkland, and residential to the south. Areas to the west, north, and east in the Santa Susana Mountains have been identified as Significant Ecological Areas. The Michael D. Antonovich Open Space Preserve abuts the field on the northeast, and numerous parks in Porter Ranch are adjacent on the south.