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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

36,106mcf gas, last 12 months+17% vs prior year
Operator
Marathon Oil Ef LLC
County
De Witt County
Field
De Witt (Eagle Ford Shale)
RRC lease
02-271615

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Where it sits

This county

De Witt CountyDe WittGoliadWilsonLavacaGonzalesKarnesVictoriaGuadalupeDe Witt County
De Witt County
Oil, last 12 months
4,008 bbl
Gas in Jul 2026
2,899 mcf

Production by month

Gas output rose 17% over the last 12 months

  • Gas (bars)
  • Oil (line)
  • Last 12 months
Gas output rose 17% over the last 12 monthsMonthly gas production and oil for MATEJEK 01, Aug 2023 to Jul 2026. Gas output rose 17% over the last 12 months. 36,106 mcf in the 12 months through Jul 2026, against 30,866 mcf in the 12 months before.Last 12 months: 36,106 mcfmcf per monthbbl per month001,0002002,0004003,0006004,0008005,0001,000Oct 23Jan 24AprJulOctJan 25AprJulOctJan 26AprJul
Gas output rose 17% over the last 12 monthsMonthly gas production and oil for MATEJEK 01, Aug 2023 to Jul 2026. Gas output rose 17% over the last 12 months. 36,106 mcf in the 12 months through Jul 2026, against 30,866 mcf in the 12 months before.Last 12 monthsmcf per monthbbl per month001,0002002,0004003,0006004,0008005,0001,000Jan 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% · 35,173 mcf

  • Lease fuel (1)

    2.6% · 933 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
42-123-3305605HActive

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
42-123-3305605H683.36

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 Oil42422,8992,8140$80.46$2.89
Jun 2026Marathon Oil1481482,6962,6210$84.81$3.15
May 2026Marathon Oil4784783,0923,0170$102.13$2.94
Apr 2026Marathon Oil3483482,8692,7770$100.32$2.77
Mar 2026Marathon Oil3993993,0943,0150$91.38$3.04
Feb 2026Marathon Oil3463462,7722,7070$64.51$3.62
Jan 2026Marathon Oil3363363,1593,0950$60.04$7.72
Dec 2025Marathon Oil4344343,6123,5240$57.97$4.26
Nov 2025Marathon Oil2912912,6232,5570$60.06$3.79
Oct 2025Marathon Oil4404403,3723,2770$60.89$3.19
Sep 2025Marathon Oil4834834,1023,9990$63.96$2.97
Aug 2025Marathon Oil2632631,8161,7700$64.86$2.91
Jul 2025Marathon Oil00220$68.39$3.20
Jun 2025Marathon Oil2612611,9201,8730$68.17$3.02
May 2025Marathon Oil3703702,8302,7690$62.17$3.12
Apr 2025Marathon Oil3943942,9842,9270$63.54$3.42
Mar 2025Marathon Oil3713712,9362,8870$68.24$4.12
Feb 2025Marathon Oil4264263,4713,4270$71.53$4.19
Jan 2025Marathon Oil1391391,6761,6510$75.74$4.13
Dec 2024Marathon Oil2672672,0652,0240$70.12$3.01
Nov 2024Marathon Oil3823823,1773,1140$69.95$2.12
Oct 2024Marathon Oil4264263,2263,1650$71.99$2.20
Sep 2024Marathon Oil4314313,2623,2130$70.24$2.28
Aug 2024Marathon Oil4424423,3172,7770$76.68$1.99
Jul 2024Marathon Oil4514513,7813,2000$81.80$2.07
Jun 2024Marathon Oil88881,9141,5720$79.77$2.54
May 2024Marathon Oil00000$80.02$2.12
Apr 2024Marathon Oil00000$85.35$1.60
Mar 2024Marathon Oil1361367586330$81.28$1.49
Feb 2024Marathon Oil4964963,0272,5270$77.25$1.72
Jan 2024Marathon Oil4924923,3822,8810$74.15$3.18
Dec 2023Marathon Oil5075073,3352,8300$71.90$2.52
Nov 2023Marathon Oil5265263,5363,0190$77.69$2.71
Oct 2023Marathon Oil5865863,8913,3400$85.64$2.98
Sep 2023Marathon Oil3633632,4382,0570$89.43$2.64
Aug 2023Marathon Oil4314313,2072,7250$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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