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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

18,482mcf gas, last 12 months−38% vs prior year
Operator
Marathon Oil Ef LLC
County
De Witt County
Field
De Witt (Eagle Ford Shale)
RRC lease
02-271618

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Where it sits

This county

De Witt CountyDe WittGoliadWilsonLavacaGonzalesKarnesVictoriaGuadalupeDe Witt County
De Witt County
Oil, last 12 months
3,475 bbl
Gas in Jul 2026
756 mcf

Checks stopped on this lease?

  • Sales

    Sales over the last 3 months fell to 16% 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 38% over the last 12 months

  • Gas (bars)
  • Oil (line)
  • Last 12 months
Gas output fell 38% over the last 12 monthsMonthly gas production and oil for MATEJEK 01, Aug 2023 to Jul 2026. Gas output fell 38% over the last 12 months. 18,482 mcf in the 12 months through Jul 2026, against 29,600 mcf in the 12 months before.Last 12 months: 18,482 mcfmcf per monthbbl per month001,0001002,0002003,0003004,0004005,000500Oct 23Jan 24AprJulOctJan 25AprJulOctJan 26AprJul
Gas output fell 38% over the last 12 monthsMonthly gas production and oil for MATEJEK 01, Aug 2023 to Jul 2026. Gas output fell 38% over the last 12 months. 18,482 mcf in the 12 months through Jul 2026, against 29,600 mcf in the 12 months before.Last 12 monthsmcf per monthbbl per month001,0001002,0002003,0003004,0004005,000500Jan 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% · 18,027 mcf

  • Lease fuel (1)

    2.5% · 455 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
42-123-3305504HActive

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
42-123-3305504H683.36

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 Oil1761767567340$80.46$2.89
Jun 2026Marathon Oil3463461141110$84.81$3.15
May 2026Marathon Oil12412493910$102.13$2.94
Apr 2026Marathon Oil90906286080$100.32$2.77
Mar 2026Marathon Oil3263262,3322,2730$91.38$3.04
Feb 2026Marathon Oil3583582,2102,1580$64.51$3.62
Jan 2026Marathon Oil4294292,5362,4840$60.04$7.72
Dec 2025Marathon Oil4404402,6642,5990$57.97$4.26
Nov 2025Marathon Oil4134132,5942,5290$60.06$3.79
Oct 2025Marathon Oil88883002920$60.89$3.19
Sep 2025Marathon Oil3013011,9481,8990$63.96$2.97
Aug 2025Marathon Oil3843842,3072,2490$64.86$2.91
Jul 2025Marathon Oil3943942,5652,5050$68.39$3.20
Jun 2025Marathon Oil3533532,3462,2890$68.17$3.02
May 2025Marathon Oil3743742,4942,4400$62.17$3.12
Apr 2025Marathon Oil3703702,4612,4140$63.54$3.42
Mar 2025Marathon Oil3823822,5462,5040$68.24$4.12
Feb 2025Marathon Oil3773772,4932,4610$71.53$4.19
Jan 2025Marathon Oil3853852,6072,5680$75.74$4.13
Dec 2024Marathon Oil4354352,7912,7350$70.12$3.01
Nov 2024Marathon Oil4334332,7132,6590$69.95$2.12
Oct 2024Marathon Oil4494492,5312,4830$71.99$2.20
Sep 2024Marathon Oil2932931,6231,5990$70.24$2.28
Aug 2024Marathon Oil002,4302,0230$76.68$1.99
Jul 2024Marathon Oil002,7302,2970$81.80$2.07
Jun 2024Marathon Oil001,7451,4280$79.77$2.54
May 2024Marathon Oil002,8032,3440$80.02$2.12
Apr 2024Marathon Oil00000$85.35$1.60
Mar 2024Marathon Oil65655584690$81.28$1.49
Feb 2024Marathon Oil4194192,8252,3760$77.25$1.72
Jan 2024Marathon Oil4124122,7202,2960$74.15$3.18
Dec 2023Marathon Oil2322323,1152,6520$71.90$2.52
Nov 2023Marathon Oil17173,2412,7470$77.69$2.71
Oct 2023Marathon Oil1191192,2951,9630$85.64$2.98
Sep 2023Marathon Oil46462,1911,8420$89.43$2.64
Aug 2023Marathon Oil2982982,2391,9010$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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