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Contra Costa County, CA oil and gas wells

Name: Contra Costa County, CA oil and gas wells
Creator: California Geologic Energy Management Division (CalGEM)

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

Operator	Active	Wells here
Pacific Gas and Electric Company	17	29
Reabold California, LLC	2	5
Chevron U.S.A. Inc.	0	50
Occidental Petroleum Corporation	0	48
Shell Western E&P Inc.	0	38
Western Continental Operating Company	0	34
California Resources Production Corporation	0	31
The Termo Company	0	22
Trico Industries Inc	0	14
Sunset Exploration, Inc.	0	12
UMC Petroleum Corp.	0	12
Venturini Associates Inc.	0	11
Natural Gas Corp. of Calif.	0	10
Tonka Energy, Inc.	0	10
Atlantic Oil Company	0	9
Nahama & Weagant Energy Company	0	9
PEOCO, LLC	0	9
Sinco Oil Corp.	0	9
Arkoma Production Company of California	0	8
Conoco Inc.	0	8
Dekalb Energy Co.	0	8
Great Yellowstone Corp.	0	8
Phillips Petroleum Co.	0	8
Phillips Petroleum Company	0	8
Production Specialties Company	0	8

Well	API / ID	Status	Type	Operator
No wells match.