Wilmington Field

California Resources Corporation (CRC) has oil and gas operations in Long Beach, California, where it has interests in the Wilmington Field, the fourth-largest oilfield in the United States based on cumulative production. CRC has a stake in over 80 percent of the properties that overlie the Wilmington Field, where we operate in collaboration with the State of California and the City of Long Beach. CRC's Long Beach operations include THUMS Long Beach Company, which operates the offshore portion of the Wilmington Field; Tidelands Oil Production Company, which operates the onshore portion of the Wilmington Field; and two additional smaller leases in the Long Beach area. In addition to the world-class Wilmington Field, CRC operates several smaller fields in Los Angeles County and the Huntington Beach Field in Orange County.

THUMS Long Beach Company

THUMS comprises four oil production islands in Long Beach Harbor that are owned by the City of Long Beach, as well as onshore facilities. The THUMS islands, which are about 10 acres in size, were named after four astronauts who died in the line of duty in the early years of the U.S. space program. The THUMS islands were designed to blend in with the surrounding coastal environment and are a popular feature of the City’s skyline. Drilling rigs and other above-ground equipment are camouflaged and sound-proofed, and wellheads and pipelines are located below ground.

THUMS' unique combination of production functionality, visual appeal and environmental and safety features has garnered the facility numerous awards and recognition from local, state and national organizations while the islands are a popular feature of the City’s skyline. All four THUMS islands have award-winning habitat conservation programs and have been certified by the Wildlife Habitat Council (WHC). Since 2004, the environmental team at THUMS has worked with WHC and community groups to establish and maintain California plant habitats on the islands.


Tidelands is the contractor that operates the West Wilmington Field for the City of Long Beach and the State of California. Tidelands' onshore production facilities and drilling operations are located in and around the Port of Long Beach. Advanced exploration technologies such as reservoir characterization have been employed in the field. Since 2003, CRC’s THUMS and Tidelands operations have generated over $4.7 billion in revenues, taxes and fees for the City of Long Beach and the State.