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Texas gas well

Producing

MAD KING UNIT

Mad King Unit is a gas well in Lavaca County, Texas, operated by Marathon Oil Ef LLC in the Eagleville (Eagle Ford-2) field.

Gas well dossier

37,239mcf gas, last 12 months−26% vs prior year
Operator
Marathon Oil Ef LLC
County
Lavaca County
Field
Eagleville (Eagle Ford-2)
RRC lease
02-289918

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Where it sits

This county

Lavaca CountyLavacaGonzalesFayetteCaldwellDe WittAustinWhartonColoradoJacksonLavaca County
Lavaca County
Oil, last 12 months
4,705 bbl
Gas in Jul 2026
0 mcf

Checks stopped on this lease?

  • Buyer

    Buyer changed: ENERGY TRANSFER COMPANY replaced MARATHON OIL EF LLC as the buyer of this lease's gas from gas wells on Sep 1, 2026.

SourceRailroad Commission production, P-5 and P-4 records, data through Jul 2026.

See why checks stop on this lease

Production by month

Gas output fell 26% over the last 12 months

  • Gas (bars)
  • Oil (line)
  • Last 12 months
Gas output fell 26% over the last 12 monthsMonthly gas production and oil for MAD KING UNIT, Aug 2023 to Jul 2026. Gas output fell 26% over the last 12 months. 37,239 mcf in the 12 months through Jul 2026, against 50,219 mcf in the 12 months before.Last 12 months: 37,239 mcfmcf per monthbbl per month002,5002505,0005007,50075010k1,00012.5k1,250Oct 23Jan 24AprJulOctJan 25AprJulOctJan 26AprJul
Gas output fell 26% over the last 12 monthsMonthly gas production and oil for MAD KING UNIT, Aug 2023 to Jul 2026. Gas output fell 26% over the last 12 months. 37,239 mcf in the 12 months through Jul 2026, against 50,219 mcf in the 12 months before.Last 12 monthsmcf per monthbbl per month002,5002505,0005007,50075010k1,00012.5k1,250Jan 24JulJan 25JulJan 26Jul

SourceTexas Railroad Commission Production Data Query, through Jul 2026.

Where the gas went

Since Feb 2026 the lease's gas goes to a processing plant instead of lease fuel

  • Processing plant (3)
  • Lease fuel (1)
  • Flared (4)
Since Feb 2026 the lease's gas goes to a processing plant instead of lease fuelShare of MAD KING UNIT gas by disposition code each month, Aug 2023 to Jul 2026. Since Feb 2026 the lease's gas goes to a processing plant instead of lease fuel.Share of the lease’s gas by disposition code, per month0%50%100%Feb 2026: fuel to plantOct 23Jan 24AprJulOctJan 25AprJulOctJan 26AprJul
Since Feb 2026 the lease's gas goes to a processing plant instead of lease fuelShare of MAD KING UNIT gas by disposition code each month, Aug 2023 to Jul 2026. Since Feb 2026 the lease's gas goes to a processing plant instead of lease fuel.Share of gas by disposition code0%50%100%Feb 26: fuel to plantJan 24JulJan 25JulJan 26Jul

SourceTexas Railroad Commission Production Data Query, through Jul 2026.

  • Processing plant (3)

    80% · 35,699 mcf

  • Lease fuel (1)

    20% · 8,889 mcf

Wells on this lease

No wells are linked to this lease in our data

Production is still reported at lease level.

Buyers and gatherers

Companies named on the Form P-4, by product
CompanyProductRoleShare%FromUntil
Mv Purchasing, LLCCondensateGathers34Sep 1, 2026–
Plains Marketing, L.p.CondensateGathers33Sep 1, 2026–
Shell Trading (Us) CompanyCondensateGathers33Sep 1, 2026–
Energy Transfer CompanyGas-well gasBuys100Sep 1, 2026–
Ensign Natural Resources II LLCGas-well gasGathers100Sep 1, 2026–
Dupre Logistics LLCCondensateGathers50Jul 22, 2020Sep 1, 2026
Pilot Travel Centers LLCCondensateGathers50Jul 22, 2020Sep 1, 2026
Marathon Oil Ef LLCGas-well gasGathers100Jul 22, 2020Sep 1, 2026
Marathon Oil Ef LLCGas-well gasBuys100Jul 22, 2020Sep 1, 2026

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

Who buys my oilOil price check

896.59 acres on the newest permit

  • 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 Mad King Unit
API numberWell no.Acreson the permit
42-285-341351H896.59

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

Unit decimal checker

What ConocoPhillips told investors it received

Marathon Oil Ef LLC is linked to ConocoPhillips (MRO).
Realized prices reported by ConocoPhillips
QuarterOil$ per bblFiling
Q2 2026$99.40SEC filing
Q1 2026$73.47SEC filing
Q3 2025$66.13SEC filing
Q2 2025$64.23SEC filing
Q1 2025$71.65SEC filing

SourceConocoPhillips quarterly reports, SEC EDGAR, company-wide averages before hedging.

Estimate your royalty

36 months, newest first

Ledger for MAD KING UNIT
MonthOil producedbblOil soldbblGas producedmcfGas soldmcf, codes 2+3FlaredmcfWTI$/bblHenry Hub$/MMBtu
Jul 202600000$80.46$2.89
Jun 20262422362,8202,4640$84.81$3.15
May 20261603442,0171,7330$102.13$2.94
Apr 20265093473,8803,2400$100.32$2.77
Mar 20263303832,3401,6780$91.38$3.04
Feb 20264734543,5512,6430$64.51$3.62
Jan 20263212891,2556020$60.04$7.72
Dec 20253874483,3792,4430$57.97$4.26
Nov 20255024832,9912,2350$60.06$3.79
Oct 20255605244,5373,6640$60.89$3.19
Sep 20254186374,2743,5080$63.96$2.97
Aug 20258037466,1955,3200$64.86$2.91
Jul 20257296237,3496,1690$68.39$3.20
Jun 20256516285,7284,6120$68.17$3.02
May 20256727374,0593,4520$62.17$3.12
Apr 20253722193,7242,89634$63.54$3.42
Mar 20252965133,8673,1890$68.24$4.12
Feb 20258765926,4375,0410$71.53$4.19
Jan 2025973706943550$75.74$4.13
Dec 20249716656,1624,8740$70.12$3.01
Nov 20243297000$69.95$2.12
Oct 20245633714,0983,1890$71.99$2.20
Sep 20242132502,4561,92663$70.24$2.28
Aug 20243635535,6454,346119$76.68$1.99
Jul 20244732375,4553,97788$81.80$2.07
Jun 20243723895,1213,74756$79.77$2.54
May 20242903453,0522,01544$80.02$2.12
Apr 20243544383,6182,45741$85.35$1.60
Mar 20245846334,9043,56253$81.28$1.49
Feb 20249891,0476,4445,3360$77.25$1.72
Jan 20248848018,3847,5680$74.15$3.18
Dec 20238568197,4586,1120$71.90$2.52
Nov 20231,2031,23111,82610,3230$77.69$2.71
Oct 20239068885,8854,7160$85.64$2.98
Sep 202388083510,6198,8000$89.43$2.64
Aug 20231,1451,13311,0339,0690$81.39$2.58

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

OperatorMarathon Oil Ef LLCFieldEagleville (Eagle Ford-2)CountyLavaca County

Marathon Oil Ef LLC in Lavaca County

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Eagleville (Eagle Ford-2) field

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