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San Joaquin County, CA oil and gas wells

1,249 wells: 100 active, 1,007 plugged, run by 239 operators.

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

Top operators in San Joaquin

OperatorActiveWells here
Pacific Gas and Electric Company73123
Lodi Gas Storage, L.L.C.2230
California Resources Production Corporation4160
Fisk Family Farms , LLC12
Chevron U.S.A. Inc.098
Great Basins Petroleum Co.052
Arcady Oil Company043
Union Oil Company of California032
Phillips Petroleum Company022
Amerada Hess Corp.021
Occidental Petroleum Corporation018
Atlantic Oil Company016
UMC Petroleum Corp.016
ABA Energy Corporation014
Towne Exploration Company, LP014
Arco Western Energy Co.013
Capitol Oil Corporation013
Shell Western E&P Inc.013
TXO Production Corp.013
Exxon Mobil Corporation012
John M. Young012
EOG Resources, Inc.011
Petrogulf Corporation011
Porter Sesnon et al011
Venoco, LLC011

Wells

Not plugged · All wells · Plugged · Orphaned

WellAPI / IDStatusTypeOperator
No wells match.