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MAMMOTH CAVE 21-4 A

Mammoth Cave 21-4 A is an oil lease in Dawson County, Texas, operated by Ike Operating, LLC in the Spraberry (Trend Area) field.

1 well

74,818bbl oil, last 12 months
Operator
Ike Operating, LLC
County
Dawson County
Field
Spraberry (Trend Area)
RRC lease
08-63297

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Where it sits

This county

Dawson CountyDawsonGainesLynnGarzaAndrewsTerryBordenDawson County
Dawson County
Gas, last 12 months
21,371 mcf
Oil in Jul 2026
5,725 bbl

Production by month

Oil output fell 73% since Sep 2024

  • Oil (bars)
  • Gas (line)
  • Last 12 months
Oil output fell 73% since Sep 2024Monthly oil production and gas for MAMMOTH CAVE 21-4 A, Sep 2024 to Jul 2026. Oil output fell 73% since Sep 2024. Monthly average of 5,574 bbl in the latest 3 months, against 20,373 bbl in the first 3.Last 12 months: 74,818 bblbbl per monthmcf per month005,0002,00010k4,00015k6,00020k8,00025k10kOct 24Jan 25AprJulOctJan 26AprJul
Oil output fell 73% since Sep 2024Monthly oil production and gas for MAMMOTH CAVE 21-4 A, Sep 2024 to Jul 2026. Oil output fell 73% since Sep 2024. Monthly average of 5,574 bbl in the latest 3 months, against 20,373 bbl in the first 3.Last 12 monthsbbl per monthmcf per month005,0002,00010k4,00015k6,00020k8,00025k10kJan 25JulJan 26Jul

SourceTexas Railroad Commission Production Data Query, through Jul 2026.

Where the gas went

Since Mar 2025 the lease's gas goes to a transmission line instead of lease fuel

Flaring peaked at 22.2% of the gas in Apr 2026.

  • Transmission line (2)
  • Lease fuel (1)
  • Flared (4)
Since Mar 2025 the lease's gas goes to a transmission line instead of lease fuelShare of MAMMOTH CAVE 21-4 A gas by disposition code each month, Sep 2024 to Jul 2026. Since Mar 2025 the lease's gas goes to a transmission line instead of lease fuel. Flaring peaked at 22.2% of the gas in Apr 2026.Share of the lease’s gas by disposition code, per month0%50%100%Mar 2025: fuel to lineFlared 22.2%Oct 24Jan 25AprJulOctJan 26AprJul
Since Mar 2025 the lease's gas goes to a transmission line instead of lease fuelShare of MAMMOTH CAVE 21-4 A gas by disposition code each month, Sep 2024 to Jul 2026. Since Mar 2025 the lease's gas goes to a transmission line instead of lease fuel. Flaring peaked at 22.2% of the gas in Apr 2026.Share of gas by disposition code0%50%100%Mar 25: fuel to lineFlared 22.2%Jan 25JulJan 26Jul

SourceTexas Railroad Commission Production Data Query, through Jul 2026.

  • Transmission line (2)

    62% · 13,169 mcf

  • Lease fuel (1)

    29% · 6,141 mcf

  • Flared (4)

    9.6% · 2,061 mcf

9.6% of the gas flared in the last 12 months. 9 months above 3%.

1 well on this lease

Wells on MAMMOTH CAVE 21-4 A
API numberWell no.Status
42-115-339792DNActive

SourceTexas Railroad Commission Wellbore Query.

Buyers and gatherers

Companies named on the Form P-4, by product
CompanyProductRoleShare%From
Energy Transfer CompanyOilGathers100Sep 10, 2024
Targa Pl Mid-Cont Westtex LLCCasinghead gasBuys100Sep 10, 2024
Targa Pl Mid-Cont Westtex LLCCasinghead gasGathers100Sep 10, 2024

SourceRailroad Commission Form P-4 file, Sep 24, 2026 (source).

Who buys my oilOil price check

1,080 acres on the newest permit

  • Worth asking

    An allocation well is on this lease

    A well drilled across several tracts shares its production by an allocation formula, so the decimal is not always your acres over the unit acres. Ask the operator for the allocation formula and the tract factor for your land.

  • Worth asking

    A Rule 37 case is listed

    The RRC permit records list a Rule 37 case. This does not establish your royalty share. Ask for the permit and unit plat for your well.

Check your decimal on this lease
Permits for Mammoth Cave 21-4 A
API numberWell no.Acreson the permit
42-115-339792DN1,080

SourceRailroad Commission drilling permits, Oct 3, 2026 (source 1, source 2).

Unit decimal checker

Estimate your royalty

23 months, newest first

Ledger for MAMMOTH CAVE 21-4 A
MonthOil producedbblOil soldbblGas producedmcfGas soldmcf, codes 2+3FlaredmcfWTI$/bblHenry Hub$/MMBtu
Jul 20265,7255,7431,2327875$80.46$2.89
Jun 20265,3575,3341,269541265$84.81$3.15
May 20265,6405,6381,6691,07772$102.13$2.94
Apr 20266,1256,1282,2791,138505$100.32$2.77
Mar 20266,8606,8671,9501,263175$91.38$3.04
Feb 20266,5626,5722,1171,186446$64.51$3.62
Jan 20268,5818,5662,8931,633481$60.04$7.72
Dec 20256,4746,4751,9281,28749$57.97$4.26
Nov 20257,9257,9262,0221,3913$60.06$3.79
Oct 20256,2606,2611,5251,08112$60.89$3.19
Sep 20256,2086,1921,8211,34628$63.96$2.97
Aug 20253,1013,12266643920$64.86$2.91
Jul 20259,4129,4103,3122,38236$68.39$3.20
Jun 20259,6199,6183,4242,49334$68.17$3.02
May 202511,08111,1023,9162,785119$62.17$3.12
Apr 202511,49111,4983,9472,91913$63.54$3.42
Mar 202510,43710,4831,6521,21914$68.24$4.12
Feb 202513,81913,8684,1332,01558$71.53$4.19
Jan 202519,11219,1327,0042,867142$75.74$4.13
Dec 202420,66820,6235,0151,85285$70.12$3.01
Nov 202421,85521,8404,6732,09653$69.95$2.12
Oct 202423,61023,7044,9012,57114$71.99$2.20
Sep 202415,65515,4523,2451,854114$70.24$2.28

Flared above 3%

SourceTexas Railroad Commission Production Data Query, through Jul 2026. Prices: EIA, through Aug 2026. Updated Oct 2, 2026.

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Nearby

This lease belongs to

OperatorIke Operating, LLCFieldSpraberry (Trend Area)CountyDawson County

Ike Operating, LLC in Dawson County

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Spraberry (Trend Area) field

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