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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

4,191mcf gas, last 12 months−82% vs prior year
Operator
Marathon Oil Ef LLC
County
De Witt County
Field
De Witt (Eagle Ford Shale)
RRC lease
02-271617

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Where it sits

This county

De Witt CountyDe WittGoliadWilsonLavacaGonzalesKarnesVictoriaGuadalupeDe Witt County
De Witt County
Oil, last 12 months
157 bbl
Gas in Jul 2026
0 mcf

Checks stopped on this lease?

  • Sales

    No sales reported for the last 7 months of state data (through Jul 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 82% over the last 12 months

  • Gas (bars)
  • Oil (line)
  • Last 12 months
Gas output fell 82% over the last 12 monthsMonthly gas production and oil for MATEJEK 01, Aug 2023 to Jul 2026. Gas output fell 82% over the last 12 months. 4,191 mcf in the 12 months through Jul 2026, against 23,358 mcf in the 12 months before.Last 12 months: 4,191 mcfmcf per monthbbl per month001,0002002,0004003,0006004,000800Oct 23Jan 24AprJulOctJan 25AprJulOctJan 26AprJul
Gas output fell 82% over the last 12 monthsMonthly gas production and oil for MATEJEK 01, Aug 2023 to Jul 2026. Gas output fell 82% over the last 12 months. 4,191 mcf in the 12 months through Jul 2026, against 23,358 mcf in the 12 months before.Last 12 monthsmcf per monthbbl per month001,0002002,0004003,0006004,000800Jan 24JulJan 25JulJan 26Jul

SourceTexas Railroad Commission Production Data Query, through Jul 2026.

Where the gas went

98% of the gas went to a processing plant in the last 12 months

  • Processing plant (3)
  • Lease fuel (1)
98% 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. 98% 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
98% 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. 98% 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)

    98% · 12,958 mcf

  • Lease fuel (1)

    2.2% · 288 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
42-123-3305303HShut-in

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

  • Good to know

    A pooling certificate (P-12) was filed

    Your tract may share its production with neighbors in a pooled unit. The unit acres the operator uses to divide production can differ from the acreage on one permit.

Check your decimal on this lease
Permits for Matejek 01
API numberWell no.Acreson the permit
42-123-3305303H683.36

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 Oil00000$80.46$2.89
Jun 2026Marathon Oil00000$84.81$3.15
May 2026Marathon Oil00000$102.13$2.94
Apr 2026Marathon Oil00000$100.32$2.77
Mar 2026Marathon Oil00000$91.38$3.04
Feb 2026Marathon Oil00000$64.51$3.62
Jan 2026Marathon Oil00000$60.04$7.72
Dec 2025Marathon Oil44220$57.97$4.26
Nov 2025Marathon Oil15152642570$60.06$3.79
Oct 2025Marathon Oil70702,6142,5400$60.89$3.19
Sep 2025Marathon Oil33332262200$63.96$2.97
Aug 2025Marathon Oil35351,0851,0580$64.86$2.91
Jul 2025Marathon Oil54541,4041,3710$68.39$3.20
Jun 2025Marathon Oil1421421,6511,6110$68.17$3.02
May 2025Marathon Oil89891,2541,2270$62.17$3.12
Apr 2025Marathon Oil1341341,0009810$63.54$3.42
Mar 2025Marathon Oil2872871,0561,0380$68.24$4.12
Feb 2025Marathon Oil1981981,5251,5060$71.53$4.19
Jan 2025Marathon Oil2782781,1651,1470$75.74$4.13
Dec 2024Marathon Oil1661661,9171,8790$70.12$3.01
Nov 2024Marathon Oil1921922,9102,8520$69.95$2.12
Oct 2024Marathon Oil7387382,8162,7630$71.99$2.20
Sep 2024Marathon Oil5005002,7002,6590$70.24$2.28
Aug 2024Marathon Oil003,9603,2970$76.68$1.99
Jul 2024Marathon Oil002011690$81.80$2.07
Jun 2024Marathon Oil001,7681,4470$79.77$2.54
May 2024Marathon Oil003,0262,5300$80.02$2.12
Apr 2024Marathon Oil00000$85.35$1.60
Mar 2024Marathon Oil111134280$81.28$1.49
Feb 2024Marathon Oil00000$77.25$1.72
Jan 2024Marathon Oil1571577386290$74.15$3.18
Dec 2023Marathon Oil6376373,8513,2680$71.90$2.52
Nov 2023Marathon Oil1681681,0328790$77.69$2.71
Oct 2023Marathon Oil4834833,2722,8040$85.64$2.98
Sep 2023Marathon Oil1621629678150$89.43$2.64
Aug 2023Marathon Oil5175172,9622,5160$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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