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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
Lease by Fountain Oil Co. 3 04-081-00007Plugged Dry holeFountain Oil Co.
Lease by Frank W. Royer 1 04-081-00150Plugged Dry holeFrank W. Royer
Lease by Guarantee Oil Co. 4 04-081-00099Plugged Oil & gasGuarantee Oil Co.
Lease by J. Berger E-1 04-081-00172Plugged Oil & gasJ. Berger
Lease by J. Berger E-2 04-081-00173Plugged Oil & gasJ. Berger
Lease by J. Berger E-4 04-081-00175Plugged Oil & gasJ. Berger
Lease by J. Berger E-6 04-081-00177Plugged Oil & gasJ. Berger
Lease by John M. Young 73 04-081-00167Plugged Dry holeJohn M. Young
Lease by John Tedesco 3 04-081-00179Plugged Oil & gasJohn Tedesco
Lease by La Honda Oil Fields Assoc. 2 04-081-00028Plugged Oil & gasLa Honda Oil Fields Assoc.
Lease by La Honda Oil Fields Assoc. 3 04-081-00029Plugged Dry holeLa Honda Oil Fields Assoc.
Lease by Peninsula Open Space Trust 1 04-081-00181Plugged Oil & gasPeninsula Open Space Trust
Lease by Smuggler-Divide Mining Co. 1 04-081-00156Plugged Dry holeSmuggler-Divide Mining Co.
Lease by Steele Bros. 1 04-081-00120Plugged Dry holeSteele Bros.
Lease by Traders Oil Corp. 1 04-081-00110Plugged Dry holeTraders Oil Corp.
Lease by W. A. Sage 1 04-081-00097Plugged Dry holeW. A. Sage
Lease by W. A. Sage 2 04-081-00178Plugged Dry holeW. A. Sage
Lease by W. A. Sage 3 04-081-00182Plugged Dry holeW. A. Sage
Leib C.H. 1 04-081-00111Plugged Dry holeChevron U.S.A. Inc.
Lena Souza 1 04-081-00136Plugged Dry holeArco Western Energy Co.
M.V. Souza 1 04-081-20011Plugged Dry holeNeaves Petro. Developments
M.V. Souza 2 04-081-20012Plugged Dry holeNeaves Petro. Developments
Mattei 1 04-081-00140Plugged Dry holeChevron U.S.A. Inc.
Muller 1 04-081-00077Plugged Dry holeUnited Cuban Oil, Inc.
NUOL 6 04-081-00052Plugged Dry holeNeaves Petro. Developments
Neaves-Bennencourt 1 04-081-00014Plugged Dry holeNeaves Petro. Developments
Neaves-Callan 1 04-081-00035Plugged Dry holeNeaves Petro. Developments
Neaves-Callan 2 04-081-00036Plugged Dry holeNeaves Petro. Developments
Neaves-De Hoff 1 04-081-00100Plugged Dry holeNeaves Petro. Developments
Neaves-Escloses 1 04-081-00038Plugged Dry holeNeaves Petro. Developments
Neaves-Kathy 1 04-081-00037Plugged Dry holeNeaves Petro. Developments
Neaves-La Honda 5 04-081-00032Plugged Dry holeNeaves Petro. Developments
Neaves-La Honda 8 04-081-00033Plugged Dry holeNeaves Petro. Developments
Neaves-La Honda 9 04-081-00039Plugged Dry holeNeaves Petro. Developments
Neaves-La Honda 10 04-081-00040Plugged Dry holeNeaves Petro. Developments
Neaves-Leib 1 04-081-00088Plugged Dry holeNeaves Petro. Developments
Neaves-Moore 1 04-081-00142Plugged Dry holeNeaves Petro. Developments
Neaves-S C L 1 04-081-00147Plugged Dry holeNeaves Petro. Developments
Neaves-Shapero 1 04-081-00041Plugged Dry holeNeaves Petro. Developments
Neaves-Stanton 1 04-081-00042Plugged Dry holeNeaves Petro. Developments
Neaves-Texaco Burns 2 04-081-00043Plugged Dry holeNeaves Petro. Developments
Neaves-Texaco-Alsford 2 04-081-00034Plugged Dry holeNeaves Petro. Developments
Neaves-Texaco-Consolidated Far 1 04-081-00129Plugged Dry holeNeaves Petro. Developments
Neaves-Texaco-Ross 1 04-081-00114Plugged Dry holeNeaves Petro. Developments
Neaves-Transierra 1 04-081-00045Plugged Dry holeNeaves Petro. Developments
Neaves-Trichenor 1 04-081-00044Plugged Dry holeNeaves Petro. Developments
Neaves-Turnbow 1 04-081-00123Plugged Dry holeNeaves Petro. Developments
Neaves-Union Burns 12 04-081-00048Plugged Dry holeNeaves Petro. Developments
Neaves-Union Burns 13 04-081-00049Plugged Dry holeNeaves Petro. Developments
Neaves-Union Oil Co. Lane 1 04-081-00051Plugged Dry holeNeaves Petro. Developments
Neaves-Union-Preugschat 1 04-081-00015Plugged Dry holeNeaves Petro. Developments
Northern Exploration 1 04-081-00053Plugged Dry holeThe Eric and Susan Dunn Living Trust dated July 27, 2006
Pacheco 1 04-081-00012Plugged Dry holeLa Brea Oil Co.
Podesta 1 04-081-00092Plugged Dry holeJ. B. Deuel & C. G. Storie
Podesta 2 04-081-00093Plugged Dry holeJ. B. Deuel & C. G. Storie
Podesta 1 04-081-20001Plugged Dry holeD.R.K. Co.
Reed 1 04-081-20021Plugged Oil & gasCosta Loma Ltd.
Richfield-Costa 4 04-081-00078Plugged Dry holeUnion Oil Company of California
Riskin 1 04-081-00127Plugged Dry holeBell & Burden, Inc.
Ross 1 04-081-00130Plugged Dry holeChevron U.S.A. Inc.
S.M.J.C. 1 04-081-20050Plugged Oil & gasSan Mateo County Community College Dist.
S.M.J.C. 2 04-081-20062Plugged Dry holeUniquad Resource Co.
Santa Cruz Lumber Co. 12-18 04-081-20059Plugged Dry holeUnion Pacific Resources Co.
Santa Cruz Lumber Co. et al 1 04-081-00153Plugged Dry holeExxon Mobil Corporation
Sarah Wilson 4 04-081-00022Plugged Dry holeE. T. Willard
Sequoia-Souza 5 04-081-00132Plugged Dry holeNeaves Petro. Developments
Souza 1 04-081-00119Plugged Dry holeReef Oil Co.
Souza 1 04-081-20009Plugged Dry holeNeaves Petro. Developments
Souza 18-1 04-081-20057Plugged Oil & gasTrident Oil & Gas Corporation, Inc.
Std.-Richfld.,Cafferata & Pime 1 04-081-00105Plugged Dry holeChevron U.S.A. Inc.
Steele 1 04-081-00141Plugged Dry holeChevron U.S.A. Inc.
Steele Core Hole 1 04-081-00155Plugged ServiceArco Western Energy Co.
Tichenor 1 04-081-00076Plugged Dry holeChevron U.S.A. Inc.
Towne 1 04-081-00126Plugged Dry holeUnion Oil Company of California
Union Oil Co., Richfield-Eaton 1 04-081-00148Plugged Dry holeUnion Oil Company of California
Union Oil, Opr., W.G.-R.-E.L.M 1 04-081-00113Plugged Dry holeUnion Oil Company of California
Unknown Conductor 1 04-081-20072Plugged Oil & gasCosta Loma Ltd.
Unknown Conductor 2 04-081-20073Plugged Oil & gasCosta Loma Ltd.
Unknown Conductor 3 04-081-20074Plugged Oil & gasCosta Loma Ltd.
Wahoo 1 04-081-20063Plugged Dry holeWahoo Oil & Gas Company
Walker-Monyier-Caughey 1 04-081-00128Plugged Dry holeFred G. Walker & Albert Monyier
Wells-Fargo 2 04-081-00146Plugged Dry holeChevron U.S.A. Inc.
Western Shore 1 04-081-00152Plugged Dry holeChevron U.S.A. Inc.
Whisnant 1 04-081-00139Plugged Dry holeM. J. & O.
Woock 1 04-081-00138Plugged Dry holeM. J. & O.
Wool 1 04-081-20041Plugged Dry holeCarlsberg Petroleum Corp
Y.M.C.A. 1 04-081-00121Plugged Dry holeExxon Mobil Corporation
Y.M.C.A. 2 04-081-00122Plugged Dry holeExxon Mobil Corporation

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