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Texas gas well

Producing

MATEJEK 01

Matejek 01 is a gas well in De Witt County, Texas, operated by Marathon Oil Ef LLC in the De Witt (Eagle Ford Shale) field.

1 well

73,341mcf gas, last 12 months+63% vs prior year
Operator
Marathon Oil Ef LLC
County
De Witt County
Field
De Witt (Eagle Ford Shale)
RRC lease
02-263988

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Where it sits

This county

De Witt CountyDe WittGoliadWilsonLavacaGonzalesKarnesVictoriaGuadalupeDe Witt County
De Witt County
Oil, last 12 months
402 bbl
Gas in Jul 2026
1,827 mcf

Production by month

Gas output rose 63% over the last 12 months

  • Gas (bars)
  • Oil (line)
  • Last 12 months
Gas output rose 63% over the last 12 monthsMonthly gas production and oil for MATEJEK 01, Aug 2023 to Jul 2026. Gas output rose 63% over the last 12 months. 73,341 mcf in the 12 months through Jul 2026, against 45,103 mcf in the 12 months before.Last 12 months: 73,341 mcfmcf per monthbbl per month002,500505,0001007,50015010k20012.5k250Oct 23Jan 24AprJulOctJan 25AprJulOctJan 26AprJul
Gas output rose 63% over the last 12 monthsMonthly gas production and oil for MATEJEK 01, Aug 2023 to Jul 2026. Gas output rose 63% over the last 12 months. 73,341 mcf in the 12 months through Jul 2026, against 45,103 mcf in the 12 months before.Last 12 monthsmcf per monthbbl per month002,500505,0001007,50015010k20012.5k250Jan 24JulJan 25JulJan 26Jul

SourceTexas Railroad Commission Production Data Query, through Jul 2026.

Where the gas went

97% of the gas went to a processing plant in the last 12 months

  • Processing plant (3)
  • Lease fuel (1)
97% of the gas went to a processing plant in the last 12 monthsShare of MATEJEK 01 gas by disposition code each month, Aug 2023 to Jul 2026. 97% of the gas went to a processing plant in the last 12 months.Share of the lease’s gas by disposition code, per month0%50%100%Oct 23Jan 24AprJulOctJan 25AprJulOctJan 26AprJul
97% of the gas went to a processing plant in the last 12 monthsShare of MATEJEK 01 gas by disposition code each month, Aug 2023 to Jul 2026. 97% of the gas went to a processing plant in the last 12 months.Share of gas by disposition code0%50%100%Jan 24JulJan 25JulJan 26Jul

SourceTexas Railroad Commission Production Data Query, through Jul 2026.

  • Processing plant (3)

    97% · 71,491 mcf

  • Lease fuel (1)

    2.5% · 1,850 mcf

Who has run this lease

The operator changed once, most recently in Mar 2023

Operators of this lease over timeEnsign Operating LLC, Jan 2020 to Feb 2023; Marathon Oil Ef LLC, Mar 2023 to Jul 20262020202120222023202420252026Changed Mar 2023Ensign Operating LLCJan 2020 to Feb 2023Marathon Oil Ef LLCMar 2023 to now
Operators of this lease over timeEnsign Operating LLC, Jan 2020 to Feb 2023; Marathon Oil Ef LLC, Mar 2023 to Jul 20262020202120222023202420252026Changed Mar 2023Ensign Operating LLCJan 2020 to Feb 2023Marathon Oil Ef LLCMar 2023 to now

SourceTexas Railroad Commission Production Data Query, through Jul 2026.

1 well on this lease

Wells on MATEJEK 01
API numberWell no.Status
42-123-3245501HActive

SourceTexas Railroad Commission Wellbore Query.

Buyers and gatherers

Companies named on the Form P-4, by product
CompanyProductRoleShare%FromUntil
Enterprise Crude Oil LLCCondensateGathers50Mar 1, 2023–
Enterprise Crude Pipeline LLCCondensateGathers50Mar 1, 2023–
Marathon Oil Ef LLCGas-well gasBuys100Mar 1, 2023–
Marathon Oil Ef LLCGas-well gasGathers100Mar 1, 2023–
Gulfmark Energy, Inc.CondensateGathers100Oct 2, 2019Mar 1, 2023
Ensign Operating LLCGas-well gasGathers100Oct 2, 2019Mar 1, 2023
Ensign Operating LLCGas-well gasBuys100Oct 2, 2019Mar 1, 2023
Ensign Operating LLCCondensateGathers50Oct 1, 2019Oct 2, 2019
Enterprise Crude Oil LLCCondensateGathers25Oct 1, 2019Oct 2, 2019
Enterprise Crude Pipeline LLCCondensateGathers25Oct 1, 2019Oct 2, 2019

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

Who buys my oilOil price check

670.02 acres on the newest permit

Check your decimal on this lease
Permits for Matejek 01
API numberWell no.Acreson the permit
42-123-3245501H670.02

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 MATEJEK 01
MonthOil producedbblOil soldbblGas producedmcfGas soldmcf, codes 2+3FlaredmcfWTI$/bblHenry Hub$/MMBtu
Jul 2026Marathon Oil62621,8271,7740$80.46$2.89
Jun 2026Marathon Oil47476,8486,6570$84.81$3.15
May 2026Marathon Oil1110,68810,4300$102.13$2.94
Apr 2026Marathon Oil21214,3064,1680$100.32$2.77
Mar 2026Marathon Oil0011,99311,6870$91.38$3.04
Feb 2026Marathon Oil17174,9484,8320$64.51$3.62
Jan 2026Marathon Oil10109,2149,0260$60.04$7.72
Dec 2025Marathon Oil35357,9357,7410$57.97$4.26
Nov 2025Marathon Oil34347,1056,9260$60.06$3.79
Oct 2025Marathon Oil41414,1304,0130$60.89$3.19
Sep 2025Marathon Oil38381,9741,9240$63.96$2.97
Aug 2025Marathon Oil96962,3732,3130$64.86$2.91
Jul 2025Marathon Oil79793,3003,2220$68.39$3.20
Jun 2025Marathon Oil99992,8212,7520$68.17$3.02
May 2025Marathon Oil99993,3593,2860$62.17$3.12
Apr 2025Marathon Oil54543,7943,7210$63.54$3.42
Mar 2025Marathon Oil48484,2494,1780$68.24$4.12
Feb 2025Marathon Oil51516,4146,3330$71.53$4.19
Jan 2025Marathon Oil65658,3318,2050$75.74$4.13
Dec 2024Marathon Oil38383,6213,5480$70.12$3.01
Nov 2024Marathon Oil55552,3852,3380$69.95$2.12
Oct 2024Marathon Oil70702,7332,6810$71.99$2.20
Sep 2024Marathon Oil56561,4641,4420$70.24$2.28
Aug 2024Marathon Oil74742,6322,1950$76.68$1.99
Jul 2024Marathon Oil95953,1132,6240$81.80$2.07
Jun 2024Marathon Oil1561563,8563,1630$79.77$2.54
May 2024Marathon Oil49493,0862,5820$80.02$2.12
Apr 2024Marathon Oil23231,8441,5650$85.35$1.60
Mar 2024Marathon Oil17174994190$81.28$1.49
Feb 2024Marathon Oil45451,3091,0930$77.25$1.72
Jan 2024Marathon Oil1141142,8922,4410$74.15$3.18
Dec 2023Marathon Oil73731,6051,3700$71.90$2.52
Nov 2023Marathon Oil60601,2091,0300$77.69$2.71
Oct 2023Marathon Oil86868086950$85.64$2.98
Sep 2023Marathon Oil79796635610$89.43$2.64
Aug 2023Marathon Oil85856865850$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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This lease belongs to

OperatorMarathon Oil Ef LLCFieldDe Witt (Eagle Ford Shale)CountyDe Witt County

Marathon Oil Ef LLC in De Witt County

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De Witt (Eagle Ford Shale) field

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