ConocoPhillips Company is an American multinational corporation engaged in hydrocarbon exploration and production. It is based in the Energy Corridor district of Houston, Texas.
Occidental Petroleum Corporation is an American company engaged in hydrocarbon exploration in the United States, and the Middle East as well as petrochemical manufacturing in the United States, Canada, and Chile. It is organized in Delaware and headquartered in Houston. The company ranked 183rd on the 2021 Fortune 500 based on its 2020 revenues and 670th on the 2021 Forbes Global 2000.
Marathon Oil Corporation is an American company engaged in hydrocarbon exploration incorporated in Ohio and headquartered at 990 Town and Country Boulevard in Houston, Texas. A direct descendant of Standard Oil, it also runs international gas operations focused on Equatorial Guinea, offshore Central Africa.
Chesapeake Energy Corporation is an American exploration and production company, headquartered in Oklahoma City.
Anadarko Petroleum Corporation was a company engaged in hydrocarbon exploration. It was organized in Delaware and headquartered in two skyscrapers in The Woodlands, Texas: the Allison Tower and the Hackett Tower, both named after former CEOs of the company. In 2019, the company was acquired by Occidental Petroleum.
APA Corporation is the holding company for Apache Corporation, an American company engaged in hydrocarbon exploration. It is organized in Delaware and headquartered in Houston. The company is ranked 431st on the Fortune 500.
EOG Resources, Inc. is an American energy company engaged in hydrocarbon exploration. It is organized in Delaware and headquartered in the Heritage Plaza building in Houston, Texas.
SandRidge Energy, Inc. is a company engaged in hydrocarbon exploration in the Mid-Continent region of the United States. It is organized in Delaware and headquartered in Oklahoma City, Oklahoma.
The Midway-Sunset Oil Field is a large oil field in Kern County, San Joaquin Valley, California in the United States. It is the largest known oilfield in California and the third largest in the United States.
The Elk Hills Oil Field is a large oil field in western Kern County, in the Elk Hills of the San Joaquin Valley, California in the United States, about 20 miles (32 km) west of Bakersfield. Discovered in 1911, and having a cumulative production of close to 1.3 billion barrels (210,000 dam3) of oil at the end of 2006, it is the fifth-largest oil field in California, and the seventh-most productive field in the United States.
The Monterey Formation is an extensive Miocene oil-rich geological sedimentary formation in California, with outcrops of the formation in parts of the California Coast Ranges, Peninsular Ranges, and on some of California's off-shore islands. The type locality is near the city of Monterey, California. The Monterey Formation is the major source-rock for 37 to 38 billion barrels of oil in conventional traps such as sandstones. This is most of California's known oil resources. The Monterey has been extensively investigated and mapped for petroleum potential, and is of major importance for understanding the complex geological history of California. Its rocks are mostly highly siliceous strata that vary greatly in composition, stratigraphy, and tectono-stratigraphic history.
Plains Exploration & Production was a petroleum and natural gas exploration company based in Houston, Texas. In May 2013, it was acquired by Freeport-McMoRan.
The Rio Vista Gas Field is a large natural gas field in the Sacramento–San Joaquin River Delta in northern California, adjacent to Rio Vista, California. Discovered in 1936, and in continuous operation since, it has produced over 3.6 trillion cubic feet (100 km3) of gas in its lifetime, and retains an estimated reserve of approximately 330 billion cubic feet (9.3×109 m3). In 2008 alone, the most recent year for which data was available, it produced 18 billion cubic feet (510,000,000 m3) of gas. Spanning portions of three counties and covering over 29,000 acres (120 km2), it is the largest natural gas field in California, and one of the fifteen largest in the United States.
The Edison Oil Field is a large oil field in Kern County, California, in the United States, in the southeastern part of the San Joaquin Valley and adjacent foothills east-southeast of Bakersfield. The field has a total productive area of over 8,000 acres (32 km2), most of which is intermingled with agricultural land uses; oil pumps and storage tanks are surrounded with row crops and orchards in much of the field's extent. Discovered in 1928, and with a cumulative production of 149 million barrels (23,700,000 m3) of oil as of 2008, and having over 6 million barrels (950,000 m3) in reserve, it is ranked 38th among California's oil fields by total ultimate recovery. It is a mature field in decline, and is run entirely by small independent operators. As of 2008, there were 40 different oil companies active on the field, one of the most in the state for a single field. 914 wells remained active on the field, averaging only two barrels of oil per well per day from the dwindling reservoirs.
Venoco, Inc. was a company engaged in hydrocarbon exploration. It primarily operated in the Monterey Formation in California. In 2017, the company filed bankruptcy and was liquidated.
The California oil and gas industry has been a major industry for over a century. Oil production was a minor factor in the 19th century, with kerosene replacing whale oil and lubricants becoming essential to the machine age. Oil became a major California industry in the 20th century with the discovery on new fields around Los Angeles and the San Joaquin Valley, and the dramatic increase in demand for gasoline to fuel automobiles and trucks. In 1900 California pumped 4 million barrels (640,000 m3), nearly 5% of the national supply. Then came a series of major discoveries, and the state pumped 100 million bbl (16 million m3) in 1914, or 38% of the national supply. In 2012 California produced 197 million bbl (31 million m3) of crude oil, out of the total 2,375 million bbl (378 million m3) of oil produced in the U.S, representing 8.3% of national production. California drilling operations and oil production are concentrated primarily in Kern County, San Joaquin Valley and the Los Angeles basin.
Whiting Petroleum Corporation was a company engaged in hydrocarbon exploration primarily in the Bakken Formation and Three Forks Shale. It was organized in Delaware with its operational headquarters in Denver, Colorado.
Chord Energy Corporation is a company engaged in hydrocarbon exploration and hydraulic fracturing in the Williston Basin in North Dakota and Montana. It is organized in Delaware and headquartered in Houston, Texas, with an office in Williston, North Dakota. The company was formerly known as Oasis Petroleum.
The Dominguez Oil Field is a large oil field underneath Dominguez Hills near Carson, California and the California State University, Dominguez Hills. It was a major oil producer from 1923 through 1960. Starting in 2010, oil companies became interested in redeveloping the field using modern extraction technologies.
Vicki Hollub is an American businesswoman and mineral engineer. She has been the president and CEO of Occidental Petroleum since April 2016, when she became the first woman heading a major American oil company.
$1.889 billion (2021)
