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San Mateo County, CA oil and gas wells

245 wells: 2 active, 188 plugged, run by 85 operators.

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

Top operators in San Mateo

OperatorActiveWells here
John Tedesco23
Neaves Petro. Developments040
Costa Loma Ltd.022
Union Oil Company of California018
Chevron U.S.A. Inc.011
The Eric and Susan Dunn Living Trust dated July 27, 2006011
Botto And Miller, Trustees07
Peninsula Open Space Trust07
John M. Young05
Zia-Verde05
Arco Western Energy Co.04
Brayton-La Honda, Ltd.04
Cann & Wallis04
E. T. Willard04
J. Berger04
KPR Corp.04
Exxon Mobil Corporation03
Fountain Oil Co.03
M. J. & O.03
Mobil Oil Exploration & Production North America, Inc.03
The 2020 Macmillan and Peterson Family Revocable Trust03
W. A. Sage03
Wilshire Oil Company, Inc.03
C. C. Julian and Co.02
Deuel Petroleum Company, Inc.02

Wells

Not plugged · All wells · Plugged · Orphaned

WellAPI / IDStatusTypeOperator
Allen Buiberson-Pereira 1 04-081-00094Plugged Dry holeG E Kadane & Sons
Alsford 1 04-081-00026Plugged Dry holeC & V Expl. Co.
Americo Cabral 1 04-081-00160Plugged Dry holeAmerico Oil Expl. & Drill. Co.
Bacciocco 1 04-081-20002Plugged Dry holeP. L. J. Co.
Beffa 1 04-081-00084Plugged Dry holeMonterey Resources, Inc.
Bell 5 04-081-00074Plugged Dry holeRa-Lite Petro., Inc.
Bernado 1 04-081-00170Plugged Dry holeDoc Oil Co. of Nevada
Bianchi 1 04-081-00087Plugged Dry holeConoco Inc.
Blomquist 1 04-081-00154Plugged Dry holeChevron U.S.A. Inc.
Burns 3 04-081-00046Plugged Dry holeBrayton-La Honda, Ltd.
Burns 11 04-081-00047Plugged DisposalThe Eric and Susan Dunn Living Trust dated July 27, 2006
Burns 15 04-081-00050Plugged Dry holeBrayton-La Honda, Ltd.
Burns 1 04-081-00055Plugged Oil & gasThe Eric and Susan Dunn Living Trust dated July 27, 2006
Burns 2 04-081-00056Plugged Oil & gasBrayton-La Honda, Ltd.
Burns 4 04-081-00057Plugged Oil & gasBrayton-La Honda, Ltd.
Burns 5 04-081-00058Plugged Oil & gasThe Eric and Susan Dunn Living Trust dated July 27, 2006
Burns 6 04-081-00059Plugged Oil & gasThe Eric and Susan Dunn Living Trust dated July 27, 2006
Burns 7 04-081-00060Plugged Oil & gasThe Eric and Susan Dunn Living Trust dated July 27, 2006
Burns 8 04-081-00061Plugged Oil & gasThe Eric and Susan Dunn Living Trust dated July 27, 2006
Burns 9 04-081-00062Plugged Oil & gasThe Eric and Susan Dunn Living Trust dated July 27, 2006
Burns 10 04-081-00063Plugged Oil & gasThe Eric and Susan Dunn Living Trust dated July 27, 2006
Burns 14 04-081-00064Plugged Oil & gasThe Eric and Susan Dunn Living Trust dated July 27, 2006
Burns 16 04-081-00065Plugged Oil & gasThe Eric and Susan Dunn Living Trust dated July 27, 2006
Burns 17V 04-081-20008Cancelled / expired Oil & gasNeaves Petro. Developments
Burns-Texaco 1 04-081-00066Plugged Oil & gasPeninsula Humane Society & SPCA
Burns-Throckmorton 19V 04-081-20010Cancelled / expired Oil & gasNeaves Petro. Developments
Butts 1 04-081-00017Plugged Dry holeShell Oil Company
Butts 2 04-081-20066Plugged Oil & gasThompson & McNickels
Carter Lane 1-A 04-081-00054Plugged OtherLa Honda Fields Limited Partnership
Carter Lane 1 04-081-00067Plugged Oil & gasBotto And Miller, Trustees
Carter Lane 2 04-081-00068Plugged Oil & gasBotto And Miller, Trustees
Carter Lane 3 04-081-00069Plugged Oil & gasBotto And Miller, Trustees
Carter Lane 4 04-081-00070Plugged Oil & gasBotto And Miller, Trustees
Carter Lane 6 04-081-00071Plugged Oil & gasBotto And Miller, Trustees
Carter Lane 7 04-081-00072Plugged Oil & gasBotto And Miller, Trustees
Cassinelli 1 04-081-00168Plugged Dry holeWilliam Y. Lee
Chi Chi 2 04-081-00158Plugged Dry holeOperators No. 1
Chi Chi 1 04-081-00161Plugged Dry holeOperators No. 1
Consolidated Farms 1 04-081-00131Plugged Dry holeChevron U.S.A. Inc.
Core Hole 2 04-081-00023Plugged ServiceJohn M. Young
Core Hole 1 04-081-00024Plugged ServiceJohn M. Young
Core Hole 8 04-081-00133Plugged ServiceMobil Oil Exploration & Production North America, Inc.
Core Hole 9 04-081-00134Plugged ServiceMobil Oil Exploration & Production North America, Inc.
Core Hole 10 04-081-00135Plugged ServiceMobil Oil Exploration & Production North America, Inc.
Costa 3-A 04-081-00079Plugged Oil & gasCosta Loma Ltd.
Costa 5-A 04-081-00080Plugged Oil & gasCosta Loma Ltd.
Costa 1 04-081-00081Plugged Oil & gasCosta Loma Ltd.
Costa 2 04-081-00082Plugged Oil & gasCosta Loma Ltd.
Costa 3-B 04-081-20006Cancelled / expired Oil & gasJ. O. Musgrave & Asso. Oil Vent.
Costa 5 04-081-20007Plugged DisposalCosta Loma Ltd.
Costa 4-A 04-081-20015Plugged Oil & gasCosta Loma Ltd.
Costa 3-A 04-081-20016Cancelled / expired Oil & gasIvan J. Vojvoda
Costa 6-A 04-081-20017Plugged Oil & gasCosta Loma Ltd.
Costa 7-A 04-081-20020Plugged Oil & gasCosta Loma Ltd.
Costa 8-A 04-081-20036Cancelled / expired Oil & gasCosta Loma Ltd.
Costa 9-A 04-081-20037Cancelled / expired Oil & gasCosta Loma Ltd.
Costa 10-A 04-081-20038Cancelled / expired Oil & gasCosta Loma Ltd.
Costa 8 04-081-20064Cancelled / expired Oil & gasCosta Loma Ltd.
Costa 8 04-081-20065Plugged Oil & gasCosta Loma Ltd.
Costa N.F.B. 1 04-081-20019Cancelled / expired Oil & gasCosta Loma Ltd.
Cowell 1 04-081-00008Plugged Oil & gasWilshire Oil Company, Inc.
Cowell 2 04-081-00009Plugged Oil & gasWilshire Oil Company, Inc.
Cowell 1 04-081-00090Plugged Dry holeMidstate Consolidated Oil Co.
Cowell 2 04-081-00091Plugged Dry holeMidstate Consolidated Oil Co.
Cowell 3 04-081-00107Plugged Dry holeWilshire Oil Company, Inc.
Cowell 8 04-081-20051Cancelled / expired Oil & gasKPR Corp.
Cowell 9 04-081-20052Cancelled / expired Oil & gasKPR Corp.
Cowell 12 04-081-20053Cancelled / expired Oil & gasKPR Corp.
Cowell 10 04-081-20055Cancelled / expired Oil & gasKPR Corp.
Cowell Estate 1 04-081-20022Plugged Oil & gasPeninsula Open Space Trust
Cowell Estate 2 04-081-20023Cancelled / expired Oil & gasNeaves Petro. Developments
Cowell Estate 3 04-081-20024Cancelled / expired Oil & gasNeaves Petro. Developments
Cowell Estate 4 04-081-20025Cancelled / expired Oil & gasNeaves Petro. Developments
Cowell Estate 5 04-081-20026Cancelled / expired Oil & gasNeaves Petro. Developments
Cowell Estate 6 04-081-20027Cancelled / expired Oil & gasNeaves Petro. Developments
Cowell Estate 2 04-081-20042Plugged Oil & gasPeninsula Open Space Trust
Cowell Estate 3 04-081-20043Plugged Oil & gasPeninsula Open Space Trust
Cowell Estate 4 04-081-20044Cancelled / expired Oil & gasZia Corp.
Cowell Estate 13 04-081-20054Plugged Oil & gasPeninsula Open Space Trust
Cowell Estate 10 04-081-20060Plugged Oil & gasPeninsula Open Space Trust
DeBenedetti 1 04-081-00162Plugged Oil & gasPeninsula Open Space Trust
DeBenedetti 73-21 04-081-00166Plugged Dry holeJohn M. Young
Dehoff 1 04-081-00095Plugged Dry holeE. R. Bardwell
E.L. Moore 2 04-081-00144Plugged Dry holeUnion Oil Company of California
E.L. Moore 3 04-081-00648Cancelled / expired Oil & gasUnion Oil Company of California
Elkus 1 04-081-00025Plugged Dry holeJohn M. Young
Elkus 2-A 04-081-00163Plugged Dry holeCann & Wallis
Elkus 1 04-081-00164Plugged Dry holeCann & Wallis
Elkus 3 04-081-00165Plugged Dry holeCann & Wallis
Elkus 2 04-081-00171Plugged Dry holeCann & Wallis
Elkus 1 04-081-00174Plugged Oil & gasDeuel Petroleum Company, Inc.
Elkus 2 04-081-00176Plugged Oil & gasDeuel Petroleum Company, Inc.
Elkus 1-15 04-081-20003Plugged Dry holeUnion Petrochemical
F.B. Hitchcock, Jr. 1 04-081-20005Plugged Dry holePhoenix West Oil and Gas Corporation
F.P. Guerra 1 04-081-00116Plugged Dry holeUnion Oil Company of California
F.P. Guerra 2 04-081-00638Cancelled / expired Oil & gasUnion Oil Company of California
Farrington 1 04-081-00001Plugged Oil & gasThe 2020 Macmillan and Peterson Family Revocable Trust
Farrington 2 04-081-00002Plugged Oil & gasThe 2020 Macmillan and Peterson Family Revocable Trust
Farrington 3 04-081-00159Plugged Dry holeThe 2020 Macmillan and Peterson Family Revocable Trust
Fatjo Tucker 1 04-081-00112Plugged Dry holeArco Western Energy Co.

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