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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

20,893mcf gas, last 12 months−55% vs prior year
Operator
Marathon Oil Ef LLC
County
De Witt County
Field
De Witt (Eagle Ford Shale)
RRC lease
02-278596

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Where it sits

This county

De Witt CountyDe WittGoliadWilsonLavacaGonzalesKarnesVictoriaGuadalupeDe Witt County
De Witt County
Oil, last 12 months
4,255 bbl
Gas in Jul 2026
953 mcf

Checks stopped on this lease?

  • Sales

    Sales over the last 3 months fell to 17% of the 9 months before.

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 55% over the last 12 months

  • Gas (bars)
  • Oil (line)
  • Last 12 months
Gas output fell 55% over the last 12 monthsMonthly gas production and oil for MATEJEK 01, Aug 2023 to Jul 2026. Gas output fell 55% over the last 12 months. 20,893 mcf in the 12 months through Jul 2026, against 46,726 mcf in the 12 months before.Last 12 months: 20,893 mcfmcf per monthbbl per month002,0002504,0005006,0007508,0001,00010k1,250Oct 23Jan 24AprJulOctJan 25AprJulOctJan 26AprJul
Gas output fell 55% over the last 12 monthsMonthly gas production and oil for MATEJEK 01, Aug 2023 to Jul 2026. Gas output fell 55% over the last 12 months. 20,893 mcf in the 12 months through Jul 2026, against 46,726 mcf in the 12 months before.Last 12 monthsmcf per monthbbl per month002,0002504,0005006,0007508,0001,00010k1,250Jan 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% · 23,862 mcf

  • Lease fuel (1)

    2.5% · 622 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
42-123-3369210HActive

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

683.36 acres on the newest permit

Check your decimal on this lease
Permits for Matejek 01
API numberWell no.Acreson the permit
42-123-3369210H683.36

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 Oil31319539250$80.46$2.89
Jun 2026Marathon Oil2285830$84.81$3.15
May 2026Marathon Oil151569670$102.13$2.94
Apr 2026Marathon Oil11000$100.32$2.77
Mar 2026Marathon Oil33220$91.38$3.04
Feb 2026Marathon Oil77440$64.51$3.62
Jan 2026Marathon Oil1,1711,1717237090$60.04$7.72
Dec 2025Marathon Oil5095093,1283,0520$57.97$4.26
Nov 2025Marathon Oil9419415,3415,2060$60.06$3.79
Oct 2025Marathon Oil6836834,2804,1590$60.89$3.19
Sep 2025Marathon Oil5965964,3874,2760$63.96$2.97
Aug 2025Marathon Oil2962961,9211,8730$64.86$2.91
Jul 2025Marathon Oil4544543,5913,5060$68.39$3.20
Jun 2025Marathon Oil7707704,2754,1710$68.17$3.02
May 2025Marathon Oil6536534,1424,0520$62.17$3.12
Apr 2025Marathon Oil6416412,8412,7860$63.54$3.42
Mar 2025Marathon Oil6626621,7601,7310$68.24$4.12
Feb 2025Marathon Oil5205202,2932,2640$71.53$4.19
Jan 2025Marathon Oil7807803,4963,4430$75.74$4.13
Dec 2024Marathon Oil6316312,6382,5850$70.12$3.01
Nov 2024Marathon Oil5915914,1524,0700$69.95$2.12
Oct 2024Marathon Oil7697695,3495,2470$71.99$2.20
Sep 2024Marathon Oil7887885,4785,3960$70.24$2.28
Aug 2024Marathon Oil7747746,7115,6080$76.68$1.99
Jul 2024Marathon Oil8878875,7994,9150$81.80$2.07
Jun 2024Marathon Oil7977975,1324,2520$79.77$2.54
May 2024Marathon Oil8928926,6715,6150$80.02$2.12
Apr 2024Marathon Oil1381381,4381,2240$85.35$1.60
Mar 2024Marathon Oil2692691,8221,5380$81.28$1.49
Feb 2024Marathon Oil8338335,3084,4320$77.25$1.72
Jan 2024Marathon Oil6926924,5433,8340$74.15$3.18
Dec 2023Marathon Oil7417415,2434,4490$71.90$2.52
Nov 2023Marathon Oil8868866,1255,2280$77.69$2.71
Oct 2023Marathon Oil7837835,7234,9100$85.64$2.98
Sep 2023Marathon Oil4804804,3253,6450$89.43$2.64
Aug 2023Marathon Oil8068066,1445,2200$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 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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