Wilmington Field

California Resources Corporation (CRC) has oil and natural gas operations in Long Beach, California, where it has interests in the Wilmington Field. Our subsidiaries, THUMS Long Beach Company and Tidelands Oil Production Company, serve as field contractors for the City of Long Beach and the State of California. Since 2003, CRC’s THUMS and Tidelands operations have generated approximately $5.6 billion in revenues, taxes and fees for the City of Long Beach and the State.

In addition, CRC operates smaller leases 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 facilities in the Port of Long Beach. 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. 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' wells and production facilities are located in and around the Port of Long Beach. Tidelands has the distinction of being the only field in California that is operated entirely by union members, all with Local 675 of the United Steelworkers. Advanced exploration technologies such as reservoir characterization have been employed in the field, and oil production revenues from both Tidelands and THUMS support many key public services in the City of Long Beach.