{
  "name": "Top California Oil & Gas Operators by Wells Operated",
  "publisher": "Buckhead Energy",
  "url": "https://www.buckheadenergy.com/top-operators-california",
  "license": "https://creativecommons.org/licenses/by/4.0/",
  "doi": "https://doi.org/10.5281/zenodo.21442884",
  "dataAsOf": "2026-08-16",
  "count": 100,
  "operators": [
    {
      "rank": 1,
      "operatorSlug": "chevron",
      "operatorName": "CHEVRON",
      "wellCount": 59416,
      "recentPermitCount": 2475,
      "ducCount": 7358,
      "producingWellCount": 36605,
      "topFormation": "San Joaquin Basin",
      "topCounty": "KERN",
      "dataAsOf": "2026-08-16"
    },
    {
      "rank": 2,
      "operatorSlug": "aera-energy",
      "operatorName": "AERA ENERGY",
      "wellCount": 57831,
      "recentPermitCount": 2273,
      "ducCount": 7401,
      "producingWellCount": 39120,
      "topFormation": "Monterey-Temblor",
      "topCounty": "KERN",
      "dataAsOf": "2026-08-16"
    },
    {
      "rank": 3,
      "operatorSlug": "california-resources-production",
      "operatorName": "CALIFORNIA RESOURCES PRODUCTION",
      "wellCount": 15279,
      "recentPermitCount": 767,
      "ducCount": 1327,
      "producingWellCount": 8935,
      "topFormation": "San Joaquin Basin",
      "topCounty": "KERN",
      "dataAsOf": "2026-08-16"
    },
    {
      "rank": 4,
      "operatorSlug": "sentinel-peak-resources-ca",
      "operatorName": "SENTINEL PEAK RESOURCES CA",
      "wellCount": 10943,
      "recentPermitCount": 769,
      "ducCount": 1293,
      "producingWellCount": 7766,
      "topFormation": "Monterey-Temblor",
      "topCounty": "KERN",
      "dataAsOf": "2026-08-16"
    },
    {
      "rank": 5,
      "operatorSlug": "berry-petroleum-company",
      "operatorName": "BERRY PETROLEUM COMPANY",
      "wellCount": 8439,
      "recentPermitCount": 803,
      "ducCount": 793,
      "producingWellCount": 6331,
      "topFormation": "Monterey-Temblor",
      "topCounty": "KERN",
      "dataAsOf": "2026-08-16"
    },
    {
      "rank": 6,
      "operatorSlug": "california-resources-elk-hills-llc",
      "operatorName": "CALIFORNIA RESOURCES ELK HILLS LLC",
      "wellCount": 7570,
      "recentPermitCount": 913,
      "ducCount": 352,
      "producingWellCount": 6770,
      "topFormation": "Monterey-Temblor",
      "topCounty": "KERN",
      "dataAsOf": "2026-08-16"
    },
    {
      "rank": 7,
      "operatorSlug": "tidelands-oil-production-company",
      "operatorName": "TIDELANDS OIL PRODUCTION COMPANY",
      "wellCount": 4172,
      "recentPermitCount": 74,
      "ducCount": 286,
      "producingWellCount": 1652,
      "topFormation": "Monterey",
      "topCounty": "LOS ANGELES",
      "dataAsOf": "2026-08-16"
    },
    {
      "rank": 8,
      "operatorSlug": "e-b-natural-resources-management",
      "operatorName": "E & B NATURAL RESOURCES MANAGEMENT",
      "wellCount": 4071,
      "recentPermitCount": 165,
      "ducCount": 467,
      "producingWellCount": 2711,
      "topFormation": "San Joaquin Basin",
      "topCounty": "KERN",
      "dataAsOf": "2026-08-16"
    },
    {
      "rank": 9,
      "operatorSlug": "union-oil-company-of-california",
      "operatorName": "UNION OIL COMPANY OF CALIFORNIA",
      "wellCount": 2561,
      "recentPermitCount": 0,
      "ducCount": 143,
      "producingWellCount": 761,
      "topFormation": "Monterey",
      "topCounty": "SANTA BARBARA",
      "dataAsOf": "2026-08-16"
    },
    {
      "rank": 10,
      "operatorSlug": "shell-oil-company",
      "operatorName": "SHELL OIL COMPANY",
      "wellCount": 2503,
      "recentPermitCount": 4,
      "ducCount": 295,
      "producingWellCount": 315,
      "topFormation": "Monterey",
      "topCounty": "KERN",
      "dataAsOf": "2026-08-16"
    },
    {
      "rank": 11,
      "operatorSlug": "crimson-resource-management",
      "operatorName": "CRIMSON RESOURCE MANAGEMENT",
      "wellCount": 2273,
      "recentPermitCount": 124,
      "ducCount": 368,
      "producingWellCount": 1497,
      "topFormation": "Monterey-Temblor",
      "topCounty": "KERN",
      "dataAsOf": "2026-08-16"
    },
    {
      "rank": 12,
      "operatorSlug": "calnrg-operating-llc",
      "operatorName": "CALNRG OPERATING LLC",
      "wellCount": 2223,
      "recentPermitCount": 88,
      "ducCount": 136,
      "producingWellCount": 1634,
      "topFormation": "Monterey",
      "topCounty": "VENTURA",
      "dataAsOf": "2026-08-16"
    },
    {
      "rank": 13,
      "operatorSlug": "thums-long-beach-company",
      "operatorName": "THUMS LONG BEACH COMPANY",
      "wellCount": 2124,
      "recentPermitCount": 99,
      "ducCount": 144,
      "producingWellCount": 1607,
      "topFormation": "Monterey",
      "topCounty": "LOS ANGELES OFFSHORE",
      "dataAsOf": "2026-08-16"
    },
    {
      "rank": 14,
      "operatorSlug": "mobil-oil",
      "operatorName": "MOBIL OIL",
      "wellCount": 1926,
      "recentPermitCount": 0,
      "ducCount": 272,
      "producingWellCount": 199,
      "topFormation": "Monterey",
      "topCounty": "LOS ANGELES",
      "dataAsOf": "2026-08-16"
    },
    {
      "rank": 15,
      "operatorSlug": "exxon-mobil-corporation",
      "operatorName": "EXXON MOBIL",
      "wellCount": 1728,
      "recentPermitCount": 0,
      "ducCount": 343,
      "producingWellCount": 631,
      "topFormation": "Monterey",
      "topCounty": "LOS ANGELES",
      "dataAsOf": "2026-08-16"
    },
    {
      "rank": 16,
      "operatorSlug": "holmes-western-oil",
      "operatorName": "HOLMES WESTERN OIL",
      "wellCount": 1410,
      "recentPermitCount": 63,
      "ducCount": 86,
      "producingWellCount": 979,
      "topFormation": "Monterey-Temblor",
      "topCounty": "KERN",
      "dataAsOf": "2026-08-16"
    },
    {
      "rank": 17,
      "operatorSlug": "macpherson-oil-company",
      "operatorName": "MACPHERSON OIL COMPANY",
      "wellCount": 1244,
      "recentPermitCount": 91,
      "ducCount": 125,
      "producingWellCount": 873,
      "topFormation": "San Joaquin Basin",
      "topCounty": "KERN",
      "dataAsOf": "2026-08-16"
    },
    {
      "rank": 18,
      "operatorSlug": "midwaysunset-investors",
      "operatorName": "MIDWAYSUNSET INVESTORS",
      "wellCount": 1041,
      "recentPermitCount": 1,
      "ducCount": 0,
      "producingWellCount": 29,
      "topFormation": "Monterey-Temblor",
      "topCounty": "OG",
      "dataAsOf": "2026-08-16"
    },
    {
      "rank": 19,
      "operatorSlug": "union-pacific-resources-company",
      "operatorName": "UNION PACIFIC RESOURCES COMPANY",
      "wellCount": 966,
      "recentPermitCount": 0,
      "ducCount": 13,
      "producingWellCount": 262,
      "topFormation": "Monterey",
      "topCounty": "LOS ANGELES",
      "dataAsOf": "2026-08-16"
    },
    {
      "rank": 20,
      "operatorSlug": "cat-canyon-resources-llc",
      "operatorName": "CAT CANYON RESOURCES LLC",
      "wellCount": 887,
      "recentPermitCount": 0,
      "ducCount": 9,
      "producingWellCount": 692,
      "topFormation": "Monterey",
      "topCounty": "SANTA BARBARA",
      "dataAsOf": "2026-08-16"
    },
    {
      "rank": 21,
      "operatorSlug": "bridge-energy-llc",
      "operatorName": "BRIDGE ENERGY LLC",
      "wellCount": 814,
      "recentPermitCount": 15,
      "ducCount": 21,
      "producingWellCount": 533,
      "topFormation": "Monterey",
      "topCounty": "ORANGE",
      "dataAsOf": "2026-08-16"
    },
    {
      "rank": 22,
      "operatorSlug": "phillips-petroleum-company",
      "operatorName": "PHILLIPS PETROLEUM COMPANY",
      "wellCount": 740,
      "recentPermitCount": 0,
      "ducCount": 201,
      "producingWellCount": 47,
      "topFormation": "Monterey",
      "topCounty": "KERN",
      "dataAsOf": "2026-08-16"
    },
    {
      "rank": 23,
      "operatorSlug": "signal-hill-petroleum",
      "operatorName": "SIGNAL HILL PETROLEUM",
      "wellCount": 740,
      "recentPermitCount": 9,
      "ducCount": 14,
      "producingWellCount": 592,
      "topFormation": "Monterey",
      "topCounty": "LOS ANGELES",
      "dataAsOf": "2026-08-16"
    },
    {
      "rank": 24,
      "operatorSlug": null,
      "operatorName": "LOST HILLS",
      "wellCount": 734,
      "recentPermitCount": 0,
      "ducCount": 0,
      "producingWellCount": 0,
      "topFormation": null,
      "topCounty": "OG",
      "dataAsOf": "2026-08-16"
    },
    {
      "rank": 25,
      "operatorSlug": "arco-western-energy",
      "operatorName": "ARCO WESTERN ENERGY",
      "wellCount": 700,
      "recentPermitCount": 0,
      "ducCount": 107,
      "producingWellCount": 73,
      "topFormation": "San Joaquin Basin",
      "topCounty": "KERN",
      "dataAsOf": "2026-08-16"
    },
    {
      "rank": 26,
      "operatorSlug": "bridgeland-resources-llc",
      "operatorName": "BRIDGELAND RESOURCES LLC",
      "wellCount": 678,
      "recentPermitCount": 52,
      "ducCount": 28,
      "producingWellCount": 533,
      "topFormation": "Monterey",
      "topCounty": "LOS ANGELES",
      "dataAsOf": "2026-08-16"
    },
    {
      "rank": 27,
      "operatorSlug": "carbon-california-operating-company-llc",
      "operatorName": "CARBON CALIFORNIA OPERATING COMPANY LLC",
      "wellCount": 667,
      "recentPermitCount": 7,
      "ducCount": 80,
      "producingWellCount": 553,
      "topFormation": "Ventura Basin",
      "topCounty": "VENTURA",
      "dataAsOf": "2026-08-16"
    },
    {
      "rank": 28,
      "operatorSlug": "pacific-coast-energy-company",
      "operatorName": "PACIFIC COAST ENERGY COMPANY",
      "wellCount": 666,
      "recentPermitCount": 36,
      "ducCount": 42,
      "producingWellCount": 457,
      "topFormation": "Monterey",
      "topCounty": "SANTA BARBARA",
      "dataAsOf": "2026-08-16"
    },
    {
      "rank": 29,
      "operatorSlug": "southern-community",
      "operatorName": "Southern Community",
      "wellCount": 630,
      "recentPermitCount": 40,
      "ducCount": 40,
      "producingWellCount": 374,
      "topFormation": "Monterey",
      "topCounty": "LOS ANGELES",
      "dataAsOf": "2026-08-16"
    },
    {
      "rank": 30,
      "operatorSlug": "dcor",
      "operatorName": "DCOR",
      "wellCount": 626,
      "recentPermitCount": 33,
      "ducCount": 200,
      "producingWellCount": 400,
      "topFormation": "Monterey",
      "topCounty": "SANTA CRUZ AREA",
      "dataAsOf": "2026-08-16"
    },
    {
      "rank": 31,
      "operatorSlug": "san-joaquin-facilities-management",
      "operatorName": "SAN JOAQUIN FACILITIES MANAGEMENT",
      "wellCount": 587,
      "recentPermitCount": 9,
      "ducCount": 8,
      "producingWellCount": 445,
      "topFormation": "San Joaquin Basin",
      "topCounty": "KERN",
      "dataAsOf": "2026-08-16"
    },
    {
      "rank": 32,
      "operatorSlug": "atlantic-oil-company",
      "operatorName": "ATLANTIC OIL COMPANY",
      "wellCount": 568,
      "recentPermitCount": 0,
      "ducCount": 260,
      "producingWellCount": 111,
      "topFormation": "Sacramento Basin",
      "topCounty": "YOLO",
      "dataAsOf": "2026-08-16"
    },
    {
      "rank": 33,
      "operatorSlug": "bellaire-oil-company",
      "operatorName": "BELLAIRE OIL COMPANY",
      "wellCount": 536,
      "recentPermitCount": 9,
      "ducCount": 1,
      "producingWellCount": 474,
      "topFormation": "San Joaquin Basin",
      "topCounty": "KERN",
      "dataAsOf": "2026-08-16"
    },
    {
      "rank": 34,
      "operatorSlug": "shadow-wolf-energy-llc",
      "operatorName": "SHADOW WOLF ENERGY LLC",
      "wellCount": 535,
      "recentPermitCount": 9,
      "ducCount": 49,
      "producingWellCount": 424,
      "topFormation": "Los Angeles Basin",
      "topCounty": "LOS ANGELES",
      "dataAsOf": "2026-08-16"
    },
    {
      "rank": 35,
      "operatorSlug": "city-of-whittier",
      "operatorName": "CITY OF WHITTIER",
      "wellCount": 525,
      "recentPermitCount": 0,
      "ducCount": 3,
      "producingWellCount": 211,
      "topFormation": "Monterey",
      "topCounty": "LOS ANGELES",
      "dataAsOf": "2026-08-16"
    },
    {
      "rank": 36,
      "operatorSlug": "hunter-edison-oil-development-ltd",
      "operatorName": "HUNTER EDISON OIL DEVELOPMENT LTD",
      "wellCount": 525,
      "recentPermitCount": 4,
      "ducCount": 10,
      "producingWellCount": 509,
      "topFormation": "San Joaquin Basin",
      "topCounty": "KERN",
      "dataAsOf": "2026-08-16"
    },
    {
      "rank": 37,
      "operatorSlug": "newbridge-resources",
      "operatorName": "NEWBRIDGE RESOURCES",
      "wellCount": 518,
      "recentPermitCount": 8,
      "ducCount": 8,
      "producingWellCount": 458,
      "topFormation": "Monterey",
      "topCounty": "SANTA BARBARA",
      "dataAsOf": "2026-08-16"
    },
    {
      "rank": 38,
      "operatorSlug": null,
      "operatorName": "KERN RIVER",
      "wellCount": 516,
      "recentPermitCount": 0,
      "ducCount": 0,
      "producingWellCount": 0,
      "topFormation": null,
      "topCounty": "SC",
      "dataAsOf": "2026-08-16"
    },
    {
      "rank": 39,
      "operatorSlug": "warren-e-p",
      "operatorName": "WARREN E & P",
      "wellCount": 504,
      "recentPermitCount": 8,
      "ducCount": 65,
      "producingWellCount": 361,
      "topFormation": "Monterey",
      "topCounty": "LOS ANGELES",
      "dataAsOf": "2026-08-16"
    },
    {
      "rank": 40,
      "operatorSlug": "west-energy-operating-llc",
      "operatorName": "WEST ENERGY OPERATING LLC",
      "wellCount": 493,
      "recentPermitCount": 24,
      "ducCount": 35,
      "producingWellCount": 372,
      "topFormation": "Monterey",
      "topCounty": "LOS ANGELES",
      "dataAsOf": "2026-08-16"
    },
    {
      "rank": 41,
      "operatorSlug": "hathaway",
      "operatorName": "HATHAWAY",
      "wellCount": 465,
      "recentPermitCount": 10,
      "ducCount": 11,
      "producingWellCount": 340,
      "topFormation": "San Joaquin Basin",
      "topCounty": "KERN",
      "dataAsOf": "2026-08-16"
    },
    {
      "rank": 42,
      "operatorSlug": "freeport-mcmoran-oil-gas",
      "operatorName": "Freeport-McMoran OIL & GAS",
      "wellCount": 464,
      "recentPermitCount": 0,
      "ducCount": 91,
      "producingWellCount": 86,
      "topFormation": "Monterey",
      "topCounty": "VENTURA",
      "dataAsOf": "2026-08-16"
    },
    {
      "rank": 43,
      "operatorSlug": "oxy",
      "operatorName": "OXY",
      "wellCount": 464,
      "recentPermitCount": 3,
      "ducCount": 146,
      "producingWellCount": 36,
      "topFormation": "Monterey-Temblor",
      "topCounty": "KERN",
      "dataAsOf": "2026-08-16"
    },
    {
      "rank": 44,
      "operatorSlug": "naftex-operating-company",
      "operatorName": "NAFTEX OPERATING COMPANY",
      "wellCount": 440,
      "recentPermitCount": 32,
      "ducCount": 14,
      "producingWellCount": 334,
      "topFormation": "San Joaquin Basin",
      "topCounty": "KERN",
      "dataAsOf": "2026-08-16"
    },
    {
      "rank": 45,
      "operatorSlug": "arco-oil-gas-company",
      "operatorName": "ARCO OIL & GAS COMPANY",
      "wellCount": 419,
      "recentPermitCount": 0,
      "ducCount": 27,
      "producingWellCount": 23,
      "topFormation": "Monterey",
      "topCounty": "SANTA BARBARA",
      "dataAsOf": "2026-08-16"
    },
    {
      "rank": 46,
      "operatorSlug": "oryx-energy-company",
      "operatorName": "ORYX ENERGY COMPANY",
      "wellCount": 413,
      "recentPermitCount": 0,
      "ducCount": 90,
      "producingWellCount": 43,
      "topFormation": "San Joaquin Basin",
      "topCounty": "KERN",
      "dataAsOf": "2026-08-16"
    },
    {
      "rank": 47,
      "operatorSlug": "kern-river-holdings-ii-llc",
      "operatorName": "KERN RIVER HOLDINGS II LLC",
      "wellCount": 410,
      "recentPermitCount": 12,
      "ducCount": 38,
      "producingWellCount": 322,
      "topFormation": "San Joaquin Basin",
      "topCounty": "KERN",
      "dataAsOf": "2026-08-16"
    },
    {
      "rank": 48,
      "operatorSlug": "amerada-hess",
      "operatorName": "AMERADA HESS",
      "wellCount": 408,
      "recentPermitCount": 0,
      "ducCount": 279,
      "producingWellCount": 45,
      "topFormation": "Sacramento Basin",
      "topCounty": "SOLANO",
      "dataAsOf": "2026-08-16"
    },
    {
      "rank": 49,
      "operatorSlug": "atlantic-richfield-company",
      "operatorName": "ATLANTIC RICHFIELD COMPANY",
      "wellCount": 407,
      "recentPermitCount": 0,
      "ducCount": 43,
      "producingWellCount": 41,
      "topFormation": "Monterey",
      "topCounty": "LOS ANGELES",
      "dataAsOf": "2026-08-16"
    },
    {
      "rank": 50,
      "operatorSlug": null,
      "operatorName": "CYMRIC",
      "wellCount": 388,
      "recentPermitCount": 0,
      "ducCount": 0,
      "producingWellCount": 0,
      "topFormation": null,
      "topCounty": "OG",
      "dataAsOf": "2026-08-16"
    },
    {
      "rank": 51,
      "operatorSlug": "west-newport-oil-company",
      "operatorName": "WEST NEWPORT OIL COMPANY",
      "wellCount": 364,
      "recentPermitCount": 0,
      "ducCount": 0,
      "producingWellCount": 286,
      "topFormation": "Monterey",
      "topCounty": "ORANGE",
      "dataAsOf": "2026-08-16"
    },
    {
      "rank": 52,
      "operatorSlug": "brea-canon-oil-company",
      "operatorName": "BREA CANON OIL COMPANY",
      "wellCount": 355,
      "recentPermitCount": 17,
      "ducCount": 19,
      "producingWellCount": 166,
      "topFormation": "Monterey",
      "topCounty": "LOS ANGELES",
      "dataAsOf": "2026-08-16"
    },
    {
      "rank": 53,
      "operatorSlug": "the-termo-company",
      "operatorName": "THE TERMO COMPANY",
      "wellCount": 349,
      "recentPermitCount": 17,
      "ducCount": 52,
      "producingWellCount": 233,
      "topFormation": "Sacramento Basin",
      "topCounty": "LOS ANGELES",
      "dataAsOf": "2026-08-16"
    },
    {
      "rank": 54,
      "operatorSlug": "venoco",
      "operatorName": "VENOCO",
      "wellCount": 330,
      "recentPermitCount": 0,
      "ducCount": 129,
      "producingWellCount": 92,
      "topFormation": "Sacramento Basin",
      "topCounty": "SANTA CRUZ AREA",
      "dataAsOf": "2026-08-16"
    },
    {
      "rank": 55,
      "operatorSlug": "trc-operating-company-inc",
      "operatorName": "TRC OPERATING COMPANY INC",
      "wellCount": 313,
      "recentPermitCount": 18,
      "ducCount": 4,
      "producingWellCount": 296,
      "topFormation": "San Joaquin Basin",
      "topCounty": "KERN",
      "dataAsOf": "2026-08-16"
    },
    {
      "rank": 56,
      "operatorSlug": "petrolud",
      "operatorName": "PETROLUD",
      "wellCount": 291,
      "recentPermitCount": 22,
      "ducCount": 74,
      "producingWellCount": 207,
      "topFormation": "San Joaquin Basin",
      "topCounty": "KERN",
      "dataAsOf": "2026-08-16"
    },
    {
      "rank": 57,
      "operatorSlug": "texaco-producing",
      "operatorName": "TEXACO PRODUCING",
      "wellCount": 288,
      "recentPermitCount": 0,
      "ducCount": 0,
      "producingWellCount": 2,
      "topFormation": "San Joaquin Basin",
      "topCounty": "KERN",
      "dataAsOf": "2026-08-16"
    },
    {
      "rank": 58,
      "operatorSlug": "hvi-cat-canyon-inc",
      "operatorName": "HVI CAT CANYON INC",
      "wellCount": 282,
      "recentPermitCount": 5,
      "ducCount": 15,
      "producingWellCount": 208,
      "topFormation": "Monterey",
      "topCounty": "SANTA BARBARA",
      "dataAsOf": "2026-08-16"
    },
    {
      "rank": 59,
      "operatorSlug": "sequoia-exploration",
      "operatorName": "SEQUOIA EXPLORATION",
      "wellCount": 274,
      "recentPermitCount": 16,
      "ducCount": 2,
      "producingWellCount": 231,
      "topFormation": "San Joaquin Basin",
      "topCounty": "KERN",
      "dataAsOf": "2026-08-16"
    },
    {
      "rank": 60,
      "operatorSlug": "conocophillips-company",
      "operatorName": "CONOCOPHILLIPS COMPANY",
      "wellCount": 262,
      "recentPermitCount": 0,
      "ducCount": 77,
      "producingWellCount": 15,
      "topFormation": "Monterey",
      "topCounty": "LOS ANGELES",
      "dataAsOf": "2026-08-16"
    },
    {
      "rank": 61,
      "operatorSlug": "vintage-petroleum",
      "operatorName": "VINTAGE PETROLEUM",
      "wellCount": 231,
      "recentPermitCount": 0,
      "ducCount": 5,
      "producingWellCount": 8,
      "topFormation": "Monterey-Temblor",
      "topCounty": "KERN",
      "dataAsOf": "2026-08-16"
    },
    {
      "rank": 62,
      "operatorSlug": "capitol-oil",
      "operatorName": "CAPITOL OIL",
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}