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 Operations Overview | Executive Summary California: Beta Unit - Offshore | Wilmington | Long Beach | Rosecrans | San Joaquin Basin Wyoming: Pacific Creek Prospect WILMINGTON OIL FIELDThe Wilmington Oil Field ("Wilmington"), discovered in 1935, is located on a large west/northwest to east/southeast-trending, doubly plunging anticline along the western margin of the Los Angeles basin in Southern California. The structural feature is approximately 15 miles long and 5 miles wide. The productive interval of the field is a thick sequence of approximately 5,000 feet of late Miocene to early Pliocene-age submarine fan deposits of the Puent and Lower Pico (Repetto) Formations. This sand-rich section varies from unconsolidated in the shallower reservoirs to semi-consolidated in the deeper reservoirs. The sand-stones are immature, attesting to their rapid deposition from the bordering penisular ranges and San Gabriel Mountains into the subsiding Los Angeles basin, which by late Miocene time had reached lower bathyal depths of nearly 6,000 feet. The productive section is comprised of conglomerate, sand, silt, and clay layers. The structure is divided into a series of large fault blocks by several major north/south-trending normal faults.
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