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Contra Costa County, CA oil and gas wells

675 wells: 19 active, 620 plugged, run by 154 operators.

Figures from the California Geologic Energy Management Division (CalGEM), updated 2026-10-19.

Top operators in Contra Costa

OperatorActiveWells here
Pacific Gas and Electric Company1729
Reabold California, LLC25
Chevron U.S.A. Inc.050
Occidental Petroleum Corporation048
Shell Western E&P Inc.038
Western Continental Operating Company034
California Resources Production Corporation031
The Termo Company022
Trico Industries Inc014
Sunset Exploration, Inc.012
UMC Petroleum Corp.012
Venturini Associates Inc.011
Natural Gas Corp. of Calif.010
Tonka Energy, Inc.010
Atlantic Oil Company09
Nahama & Weagant Energy Company09
PEOCO, LLC09
Sinco Oil Corp.09
Arkoma Production Company of California08
Conoco Inc.08
Dekalb Energy Co.08
Great Yellowstone Corp.08
Phillips Petroleum Co.08
Phillips Petroleum Company08
Production Specialties Company08

Wells

Not plugged · All wells · Plugged · Orphaned

WellAPI / IDStatusTypeOperator
Banshee 1-7 04-013-20362Shut in GasPEOCO, LLC
Burroughs 6-2 04-013-20330Shut in GasCalifornia Resources Production Corporation
Ginochio 3-7 04-013-00135Active ServicePacific Gas and Electric Company
Jordan 9 04-013-20377Shut in GasCalifornia Resources Production Corporation
Jordan 8 04-013-20378Shut in GasCalifornia Resources Production Corporation
Lease by William Edwards 1 04-013-00310Shut in GasWilliam Edwards
Los Medanos 3-A 04-013-20115Active StoragePacific Gas and Electric Company
Los Medanos 15-C 04-013-20121Active ServicePacific Gas and Electric Company
Los Medanos 9-C 04-013-20123Active StoragePacific Gas and Electric Company
Los Medanos 11-C 04-013-20128Active StoragePacific Gas and Electric Company
Los Medanos 7-C 04-013-20130Active StoragePacific Gas and Electric Company
Los Medanos 10-C 04-013-20131Active StoragePacific Gas and Electric Company
Los Medanos 16-D 04-013-20133Active StoragePacific Gas and Electric Company
Los Medanos 17-D 04-013-20136Active StoragePacific Gas and Electric Company
Los Medanos 2-A 04-013-20138Active StoragePacific Gas and Electric Company
Los Medanos 6-B 04-013-20140Active StoragePacific Gas and Electric Company
Los Medanos 5-B 04-013-20144Shut in StoragePacific Gas and Electric Company
Los Medanos 19-D 04-013-20295Active StoragePacific Gas and Electric Company
Los Medanos 20-D 04-013-20297Active StoragePacific Gas and Electric Company
Los Medanos 14-C 04-013-20298Active StoragePacific Gas and Electric Company
Los Medanos 13-C 04-013-20299Active StoragePacific Gas and Electric Company
Los Medanos 12-C 04-013-20307Active StoragePacific Gas and Electric Company
Los Medanos 21-D 04-013-20308Active StoragePacific Gas and Electric Company
Los Medanos 23B 04-013-20387Permitted StoragePacific Gas and Electric Company
Los Medanos 22-D 04-013-20388Permitted StoragePacific Gas and Electric Company
NGC-Nunn 1 04-013-20153Shut in GasSunset Exploration, Inc.
NGC-Nunn 2 04-013-20168Shut in GasSunset Exploration, Inc.
Neely 1 04-013-20213Shut in GasPEOCO, LLC
Neely 2 04-013-20227Shut in GasPEOCO, LLC
R.D. Reedy 1 04-013-20363Shut in GasPEOCO, LLC
R.D. Reedy 2 04-013-20365Shut in GasPEOCO, LLC
R.D. Reedy 3 04-013-20367Shut in GasPEOCO, LLC
R.D. Reedy 4 04-013-20368Shut in GasPEOCO, LLC
RVGU 36 04-013-00153Shut in GasCalifornia Resources Production Corporation
RVGU 123 04-013-00154Shut in GasCalifornia Resources Production Corporation
RVGU 37 04-013-00155Shut in GasCalifornia Resources Production Corporation
RVGU 67 04-013-00161Shut in GasCalifornia Resources Production Corporation
RVGU 68 04-013-00162Shut in GasCalifornia Resources Production Corporation
RVGU 269 04-013-20376Shut in GasCalifornia Resources Production Corporation
Scopesi 3 04-013-20374Shut in GasPEOCO, LLC
Tract 1 1-4 04-013-00012Shut in GasCalifornia Resources Production Corporation
Tract 1 1-1 04-013-00121Shut in GasCalifornia Resources Production Corporation
Tract 1 1-5 04-013-00123Shut in GasCalifornia Resources Production Corporation
Tract 1 1-7 04-013-20082Shut in GasCalifornia Resources Production Corporation
Tract 2 2-1 04-013-00096Shut in GasCalifornia Resources Production Corporation
Tract 2 2-3 04-013-20371Shut in GasCalifornia Resources Production Corporation
Venturini-Ginochio 3 04-013-20384Active Oil & gasReabold California, LLC
Venturini-Ginochio 4 04-013-20385Active Oil & gasReabold California, LLC
Venturini-Ginochio 6 04-013-20386Shut in Oil & gasReabold California, LLC