{
  "name": "Colorado Oil & Gas Formations and Plays, Ranked by Well Count",
  "publisher": "Buckhead Energy",
  "url": "https://www.buckheadenergy.com/formations-colorado",
  "license": "https://creativecommons.org/licenses/by/4.0/",
  "doi": "https://doi.org/10.5281/zenodo.21442884",
  "dataAsOf": "2026-08-23",
  "count": 24,
  "formations": [
    {
      "state": "CO",
      "formationSlug": "muddy-j-sand",
      "formationName": "Muddy J Sand",
      "wellCount": 52469,
      "activeOperators": 1352,
      "totalLateralFt": "114020292",
      "recentPermits24Mo": 223,
      "primaryCounties": "WELD, ADAMS, MORGAN, ARAPAHOE, LARIMER",
      "topOperators": [
        {
          "name": "NOBLE ENERGY",
          "slug": "noble-energy-inc",
          "wells": 9898
        },
        {
          "name": "KERRMCGEE",
          "slug": "kerrmcgee",
          "wells": 9073
        },
        {
          "name": "PDC ENERGY",
          "slug": "pdc-energy",
          "wells": 7689
        },
        {
          "name": "CRESTONE PEAK RESOURCES OPERATING",
          "slug": null,
          "wells": 2191
        },
        {
          "name": "EXTRACTION OIL & GAS",
          "slug": null,
          "wells": 1531
        },
        {
          "name": "K P KAUFFMAN COMPANY",
          "slug": null,
          "wells": 1419
        },
        {
          "name": "BONANZA CREEK ENERGY OPERATING COMPANY",
          "slug": null,
          "wells": 1103
        },
        {
          "name": "BISON IV OPERATING LLC",
          "slug": null,
          "wells": 998
        },
        {
          "name": "HIGHPOINT OPERATING",
          "slug": "highpoint-production",
          "wells": 951
        },
        {
          "name": "PRAIRIE OPERATING CO LLC",
          "slug": "prairie-resources",
          "wells": 615
        }
      ],
      "dataAsOf": "2026-08-23"
    },
    {
      "state": "CO",
      "formationSlug": "d-sand",
      "formationName": "D Sand",
      "wellCount": 14078,
      "activeOperators": 1344,
      "totalLateralFt": "384206",
      "recentPermits24Mo": 0,
      "primaryCounties": "WASHINGTON, LOGAN, MORGAN, ADAMS, ARAPAHOE",
      "topOperators": [
        {
          "name": "PADCO",
          "slug": null,
          "wells": 446
        },
        {
          "name": "BRITISH AMERICAN OIL PRODUCTION COMPANY",
          "slug": "british-american-oil-production-company",
          "wells": 315
        },
        {
          "name": "ALLISON DRILLING COMPANY",
          "slug": null,
          "wells": 261
        },
        {
          "name": "TIGER OIL COMPANY",
          "slug": "tiger-oil-company",
          "wells": 236
        },
        {
          "name": "EXETER DRILLING COMPANY",
          "slug": null,
          "wells": 205
        },
        {
          "name": "PLAINS EXPLORATION & PRODUCTION COMPANY",
          "slug": "plains-exploration-production-company",
          "wells": 205
        },
        {
          "name": "IMPETRO RESOURCES",
          "slug": "impetro-operating-llc",
          "wells": 196
        },
        {
          "name": "KIMBARK OIL & GAS COMPANY",
          "slug": "kimbark-oil-gas-company",
          "wells": 193
        },
        {
          "name": "PCR OPERATING",
          "slug": null,
          "wells": 182
        },
        {
          "name": "PETROLEUM",
          "slug": "petroleum",
          "wells": 172
        }
      ],
      "dataAsOf": "2026-08-23"
    },
    {
      "state": "CO",
      "formationSlug": "niobrara-east",
      "formationName": "Niobrara East",
      "wellCount": 6709,
      "activeOperators": 229,
      "totalLateralFt": "126996",
      "recentPermits24Mo": 0,
      "primaryCounties": "YUMA, PHILLIPS, KIT CARSON, SEDGWICK",
      "topOperators": [
        {
          "name": "OWN RESOURCES OPERATING",
          "slug": "own-resources-operating",
          "wells": 3440
        },
        {
          "name": "OMIMEX PETROLEUM",
          "slug": "omimex-petroleum",
          "wells": 477
        },
        {
          "name": "J W OPERATING COMPANY",
          "slug": "j-w-operating-company",
          "wells": 270
        },
        {
          "name": "ROSEWOOD RESOURCES",
          "slug": "rosewood-resources-inc",
          "wells": 235
        },
        {
          "name": "WME YATES LLC",
          "slug": null,
          "wells": 212
        },
        {
          "name": "PDC ENERGY",
          "slug": "pdc-energy",
          "wells": 141
        },
        {
          "name": "NOBLE ENERGY",
          "slug": "noble-energy-inc",
          "wells": 128
        },
        {
          "name": "BERRY PETROLEUM COMPANY",
          "slug": "berry-petroleum-company",
          "wells": 128
        },
        {
          "name": "SAMEDAN OIL",
          "slug": "samedan-oil",
          "wells": 113
        },
        {
          "name": "ROSETTA RESOURCES OPERATING",
          "slug": "rosetta-resources-operating-lp",
          "wells": 79
        }
      ],
      "dataAsOf": "2026-08-23"
    },
    {
      "state": "CO",
      "formationSlug": "piceance-basin",
      "formationName": "Piceance Basin",
      "wellCount": 4432,
      "activeOperators": 394,
      "totalLateralFt": "1174223",
      "recentPermits24Mo": 138,
      "primaryCounties": "RIO BLANCO, MESA, GARFIELD, GUNNISON, DELTA",
      "topOperators": [
        {
          "name": "SCOUT ENERGY MANAGEMENT",
          "slug": "scout-energy-management-llc",
          "wells": 1162
        },
        {
          "name": "TEP ROCKY MOUNTAIN",
          "slug": null,
          "wells": 212
        },
        {
          "name": "QB ENERGY OPERATING LLC",
          "slug": null,
          "wells": 191
        },
        {
          "name": "LARAMIE ENERGY",
          "slug": null,
          "wells": 160
        },
        {
          "name": "TWIN ARROW",
          "slug": null,
          "wells": 158
        },
        {
          "name": "VISION ENERGY GROUP",
          "slug": null,
          "wells": 119
        },
        {
          "name": "SG INTERESTS I",
          "slug": null,
          "wells": 116
        },
        {
          "name": "FRAM OPERATING",
          "slug": "fram-operating",
          "wells": 90
        },
        {
          "name": "CHEVRON",
          "slug": "chevron",
          "wells": 73
        },
        {
          "name": "DIAMOND BACK DRILLING & SUPPLY",
          "slug": null,
          "wells": 72
        }
      ],
      "dataAsOf": "2026-08-23"
    },
    {
      "state": "CO",
      "formationSlug": "pierre-niobrara",
      "formationName": "Pierre -Niobrara",
      "wellCount": 4208,
      "activeOperators": 125,
      "totalLateralFt": "276140",
      "recentPermits24Mo": 0,
      "primaryCounties": "LAS ANIMAS, HUERFANO",
      "topOperators": [
        {
          "name": "EVERGREEN NATURAL RESOURCES LLC",
          "slug": null,
          "wells": 2504
        },
        {
          "name": "OGRIS OPERATING LLC",
          "slug": "ogris-operating-llc",
          "wells": 536
        },
        {
          "name": "PIONEER NATURAL RESOURCES",
          "slug": null,
          "wells": 233
        },
        {
          "name": "HIGH RIVER RESOURCES OPERATING LLC",
          "slug": null,
          "wells": 149
        },
        {
          "name": "EVERGREEN OPERATING",
          "slug": "evergreen-operating",
          "wells": 107
        },
        {
          "name": "PETROGLYPH OPERATING COMPANY",
          "slug": "petroglyph-operating-company",
          "wells": 80
        },
        {
          "name": "TEP ROCKY MOUNTAIN",
          "slug": null,
          "wells": 65
        },
        {
          "name": "XTO ENERGY",
          "slug": "xto-energy-inc",
          "wells": 56
        },
        {
          "name": "RED RIVER RANCH HOLDINGS",
          "slug": null,
          "wells": 51
        },
        {
          "name": "CEDAR RIDGE",
          "slug": "cedar-ridge-energy-inc",
          "wells": 44
        }
      ],
      "dataAsOf": "2026-08-23"
    },
    {
      "state": "CO",
      "formationSlug": "denver-basin",
      "formationName": "Denver Basin",
      "wellCount": 3721,
      "activeOperators": 335,
      "totalLateralFt": "29384305",
      "recentPermits24Mo": 1027,
      "primaryCounties": "WELD, FREMONT, LINCOLN, ADAMS, ARAPAHOE",
      "topOperators": [
        {
          "name": "KERRMCGEE",
          "slug": "kerrmcgee",
          "wells": 699
        },
        {
          "name": "PDC ENERGY",
          "slug": "pdc-energy",
          "wells": 518
        },
        {
          "name": "NOBLE ENERGY",
          "slug": "noble-energy-inc",
          "wells": 315
        },
        {
          "name": "CRESTONE PEAK RESOURCES OPERATING",
          "slug": null,
          "wells": 224
        },
        {
          "name": "BISON IV OPERATING LLC",
          "slug": null,
          "wells": 208
        },
        {
          "name": "VERDAD RESOURCES",
          "slug": "verdad-oil-gas-corporation",
          "wells": 170
        },
        {
          "name": "EXTRACTION OIL & GAS",
          "slug": null,
          "wells": 105
        },
        {
          "name": "PRAIRIE OPERATING CO LLC",
          "slug": "prairie-resources",
          "wells": 82
        },
        {
          "name": "BONANZA CREEK ENERGY OPERATING COMPANY",
          "slug": null,
          "wells": 65
        },
        {
          "name": "JAVERNICK OIL",
          "slug": null,
          "wells": 58
        }
      ],
      "dataAsOf": "2026-08-23"
    },
    {
      "state": "CO",
      "formationSlug": "las-animas-arch",
      "formationName": "Las Animas Arch",
      "wellCount": 3452,
      "activeOperators": 435,
      "totalLateralFt": "94212",
      "recentPermits24Mo": 11,
      "primaryCounties": "CHEYENNE, KIOWA, KIT CARSON, BENT, OTERO",
      "topOperators": [
        {
          "name": "MULL DRILLING COMPANY",
          "slug": "mull-drilling-company",
          "wells": 487
        },
        {
          "name": "ANADARKO PETROLEUM",
          "slug": "anadarko-petroleum",
          "wells": 435
        },
        {
          "name": "CITATION OIL & GAS",
          "slug": "citation-oil-gas-corp",
          "wells": 220
        },
        {
          "name": "MURFIN DRILLING",
          "slug": "murfin-drilling-company-inc",
          "wells": 121
        },
        {
          "name": "TXO PRODUCTION",
          "slug": "txo-production",
          "wells": 104
        },
        {
          "name": "STRACHAN EXPLORATION",
          "slug": null,
          "wells": 69
        },
        {
          "name": "WIEPKINGFULLERTON ENERGY",
          "slug": null,
          "wells": 64
        },
        {
          "name": "POANDG OPERATING",
          "slug": "poandg-operating",
          "wells": 58
        },
        {
          "name": "TEXAS OIL & GAS",
          "slug": "texas-oil-gas",
          "wells": 57
        },
        {
          "name": "CHAMPLIN PETROLEUM COMPANY",
          "slug": "champlin-petroleum-company",
          "wells": 55
        }
      ],
      "dataAsOf": "2026-08-23"
    },
    {
      "state": "CO",
      "formationSlug": "dakota",
      "formationName": "Dakota",
      "wellCount": 2350,
      "activeOperators": 92,
      "totalLateralFt": "495446",
      "recentPermits24Mo": 0,
      "primaryCounties": "LA PLATA",
      "topOperators": [
        {
          "name": "SIMCOE LLC",
          "slug": "simcoe-oil-company",
          "wells": 917
        },
        {
          "name": "RED WILLOW PRODUCTION COMPANY",
          "slug": null,
          "wells": 358
        },
        {
          "name": "HILCORP ENERGY COMPANY",
          "slug": "hilcorp-energy-company",
          "wells": 266
        },
        {
          "name": "ENDURING RESOURCES",
          "slug": "enduring-resources-llc",
          "wells": 113
        },
        {
          "name": "LOGOS OPERATING",
          "slug": "logos-oil",
          "wells": 83
        },
        {
          "name": "BPX OPERATING COMPANY",
          "slug": "bpx-operating-company",
          "wells": 71
        },
        {
          "name": "PINELAND OPERATING COMPANY LLC",
          "slug": null,
          "wells": 61
        },
        {
          "name": "ARCO OIL & GAS COMPANY",
          "slug": "arco-oil-gas-company",
          "wells": 45
        },
        {
          "name": "MARALEX RESOURCES",
          "slug": null,
          "wells": 39
        },
        {
          "name": "ABUNDANCE ENERGY SERVICES LLC",
          "slug": "abundance-energy-services-llc",
          "wells": 39
        }
      ],
      "dataAsOf": "2026-08-23"
    },
    {
      "state": "CO",
      "formationSlug": "mancos-dakota",
      "formationName": "Mancos-Dakota",
      "wellCount": 2118,
      "activeOperators": 155,
      "totalLateralFt": "113570",
      "recentPermits24Mo": 0,
      "primaryCounties": "RIO BLANCO, GARFIELD, MESA",
      "topOperators": [
        {
          "name": "UTAH GAS OP LTD DBA UTAH GAS",
          "slug": null,
          "wells": 693
        },
        {
          "name": "LOCIN OIL",
          "slug": "locin-oil-corporation",
          "wells": 373
        },
        {
          "name": "CONOCOPHILLIPS COMPANY",
          "slug": "conocophillips-company",
          "wells": 83
        },
        {
          "name": "COSEKA RESOURCES",
          "slug": null,
          "wells": 82
        },
        {
          "name": "CHANDLER & ASSOCIATES",
          "slug": "chandler-associates",
          "wells": 81
        },
        {
          "name": "ENCANA OIL & GAS",
          "slug": "encana-oil-gas",
          "wells": 78
        },
        {
          "name": "KGH OPERATING COMPANY",
          "slug": null,
          "wells": 47
        },
        {
          "name": "MITCHELL ENERGY",
          "slug": "mitchell-energy",
          "wells": 37
        },
        {
          "name": "FUEL RESOURCES DEVELOPMENT COMPANY",
          "slug": null,
          "wells": 32
        },
        {
          "name": "ROBERT L BAYLESS PRODUCER",
          "slug": null,
          "wells": 27
        }
      ],
      "dataAsOf": "2026-08-23"
    },
    {
      "state": "CO",
      "formationSlug": "san-juan-basin",
      "formationName": "San Juan Basin",
      "wellCount": 1827,
      "activeOperators": 248,
      "totalLateralFt": "2935774",
      "recentPermits24Mo": 33,
      "primaryCounties": "LA PLATA, ARCHULETA, MONTEZUMA",
      "topOperators": [
        {
          "name": "SIMCOE LLC",
          "slug": "simcoe-oil-company",
          "wells": 332
        },
        {
          "name": "RED WILLOW PRODUCTION COMPANY",
          "slug": null,
          "wells": 208
        },
        {
          "name": "CATAMOUNT ENERGY PARTNERS",
          "slug": "catamount-resources",
          "wells": 163
        },
        {
          "name": "RED MESA HOLDINGS/O&G",
          "slug": null,
          "wells": 76
        },
        {
          "name": "HUGHES WILLIAM E",
          "slug": null,
          "wells": 76
        },
        {
          "name": "HILCORP ENERGY COMPANY",
          "slug": "hilcorp-energy-company",
          "wells": 68
        },
        {
          "name": "WILLIFORD RESOURCES",
          "slug": "williford-resources",
          "wells": 58
        },
        {
          "name": "ENDURING RESOURCES",
          "slug": "enduring-resources-llc",
          "wells": 55
        },
        {
          "name": "PETROX RESOURCES",
          "slug": "petrox",
          "wells": 45
        },
        {
          "name": "MORNING STAR OIL COMPANY",
          "slug": "morning-star-oil-company",
          "wells": 32
        }
      ],
      "dataAsOf": "2026-08-23"
    },
    {
      "state": "CO",
      "formationSlug": "mesaverde",
      "formationName": "Mesaverde_",
      "wellCount": 1812,
      "activeOperators": 73,
      "totalLateralFt": "1105424",
      "recentPermits24Mo": 0,
      "primaryCounties": "LA PLATA, ARCHULETA",
      "topOperators": [
        {
          "name": "SIMCOE LLC",
          "slug": "simcoe-oil-company",
          "wells": 452
        },
        {
          "name": "RED WILLOW PRODUCTION COMPANY",
          "slug": null,
          "wells": 442
        },
        {
          "name": "HILCORP ENERGY COMPANY",
          "slug": "hilcorp-energy-company",
          "wells": 197
        },
        {
          "name": "ABUNDANCE ENERGY SERVICES LLC",
          "slug": "abundance-energy-services-llc",
          "wells": 123
        },
        {
          "name": "LOGOS OPERATING",
          "slug": "logos-oil",
          "wells": 115
        },
        {
          "name": "BPX OPERATING COMPANY",
          "slug": "bpx-operating-company",
          "wells": 74
        },
        {
          "name": "MORNING STAR OIL COMPANY",
          "slug": "morning-star-oil-company",
          "wells": 43
        },
        {
          "name": "HIGH RIVER RESOURCES OPERATING LLC",
          "slug": null,
          "wells": 33
        },
        {
          "name": "AMOCO PRODUCTION COMPANY",
          "slug": "amoco-production-company",
          "wells": 28
        },
        {
          "name": "PAN AMERICAN PETROLEUM",
          "slug": "pan-american-petroleum",
          "wells": 25
        }
      ],
      "dataAsOf": "2026-08-23"
    },
    {
      "state": "CO",
      "formationSlug": "paradox-basin",
      "formationName": "Paradox Basin",
      "wellCount": 1789,
      "activeOperators": 322,
      "totalLateralFt": "382032",
      "recentPermits24Mo": 0,
      "primaryCounties": "MONTEZUMA, SAN MIGUEL, DOLORES, MONTROSE, LA PLATA",
      "topOperators": [
        {
          "name": "KINDER MORGAN CO2 CO LLC",
          "slug": "kinder-morgan-co2-company-llc",
          "wells": 241
        },
        {
          "name": "AMERICAN HELIUM LLC",
          "slug": null,
          "wells": 161
        },
        {
          "name": "HIGHPOINT OPERATING",
          "slug": "highpoint-production",
          "wells": 67
        },
        {
          "name": "MESA VERDE DRILLING",
          "slug": null,
          "wells": 60
        },
        {
          "name": "BUSH DRLG COMPANY",
          "slug": null,
          "wells": 47
        },
        {
          "name": "SEELEY OIL COMPANY",
          "slug": null,
          "wells": 34
        },
        {
          "name": "SHELL OIL COMPANY",
          "slug": "shell-oil-company",
          "wells": 31
        },
        {
          "name": "WRIGHT ROBERTLLC",
          "slug": null,
          "wells": 30
        },
        {
          "name": "PATARA OIL & GAS",
          "slug": null,
          "wells": 29
        },
        {
          "name": "CABOT OIL & GAS",
          "slug": null,
          "wells": 27
        }
      ],
      "dataAsOf": "2026-08-23"
    },
    {
      "state": "CO",
      "formationSlug": "anadarko-basin",
      "formationName": "Anadarko Basin",
      "wellCount": 1412,
      "activeOperators": 311,
      "totalLateralFt": "68072",
      "recentPermits24Mo": 0,
      "primaryCounties": "BACA, PROWERS, CHEYENNE, KIOWA",
      "topOperators": [
        {
          "name": "COLORADO INTERSTATE GAS COMPANY",
          "slug": "colorado-interstate-gas-company",
          "wells": 80
        },
        {
          "name": "HORIZON OIL & GAS COMPANY",
          "slug": "horizon-oil-gas-company",
          "wells": 65
        },
        {
          "name": "DOVER ATWOOD",
          "slug": "dover-atwood",
          "wells": 58
        },
        {
          "name": "MURFIN DRILLING",
          "slug": "murfin-drilling-company-inc",
          "wells": 57
        },
        {
          "name": "BERRY WALTER V DBA BERRY ENERGY",
          "slug": null,
          "wells": 51
        },
        {
          "name": "TXO PRODUCTION",
          "slug": "txo-production",
          "wells": 42
        },
        {
          "name": "SAMSON RESOURCES COMPANY",
          "slug": "samson-resources-company",
          "wells": 38
        },
        {
          "name": "ENERGY ALLIANCE COMPANY",
          "slug": "alliance-energy-partners-llc",
          "wells": 35
        },
        {
          "name": "SOVEREIGN OPERATING COMPANY",
          "slug": null,
          "wells": 32
        },
        {
          "name": "THE MARLIN OIL",
          "slug": null,
          "wells": 32
        }
      ],
      "dataAsOf": "2026-08-23"
    },
    {
      "state": "CO",
      "formationSlug": "mesaverde-lance-lewis",
      "formationName": "Mesaverde-Lance-Lewis",
      "wellCount": 1223,
      "activeOperators": 170,
      "totalLateralFt": "136617",
      "recentPermits24Mo": 0,
      "primaryCounties": "MOFFAT",
      "topOperators": [
        {
          "name": "WEXPRO COMPANY",
          "slug": null,
          "wells": 291
        },
        {
          "name": "HILCORP ENERGY COMPANY",
          "slug": "hilcorp-energy-company",
          "wells": 90
        },
        {
          "name": "SOUTHWESTERN ENERGY PRODUCTION COMPANY",
          "slug": "southwestern-energy-production-company",
          "wells": 54
        },
        {
          "name": "EOG RESOURCES",
          "slug": "eog-resources-inc",
          "wells": 40
        },
        {
          "name": "ARGALI EXPLORATION COMPANY",
          "slug": null,
          "wells": 40
        },
        {
          "name": "QUESTAR EXPLORATION & PRODUCTION COMPANY",
          "slug": "questar-exploration-production-company",
          "wells": 38
        },
        {
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          "name": "WESTERN GAS RESOURCES",
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          "name": "NORTH SHORE EXPLORATION & PRODUCTION",
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        {
          "name": "WOLVERINE RESOURCES LLC",
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          "name": "PIONEER NATURAL RESOURCES",
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        {
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}