Skip to content
Royalty Clerk

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

37,964mcf gas, last 12 months−1% vs prior year
Operator
Marathon Oil Ef LLC
County
De Witt County
Field
De Witt (Eagle Ford Shale)
RRC lease
02-280330

Is your check right?

Check my statement

Where it sits

This county

De Witt CountyDe WittGoliadWilsonLavacaGonzalesKarnesVictoriaGuadalupeDe Witt County
De Witt County
Oil, last 12 months
2,105 bbl
Gas in Jul 2026
243 mcf

Production by month

Gas output held steady over the last 12 months

  • Gas (bars)
  • Oil (line)
  • Last 12 months
Gas output held steady over the last 12 monthsMonthly gas production and oil for MATEJEK 01, Aug 2023 to Jul 2026. Gas output held steady over the last 12 months. 37,964 mcf in the 12 months through Jul 2026, against 38,159 mcf in the 12 months before.Last 12 months: 37,964 mcfmcf per monthbbl per month002,0001004,0002006,0003008,000400Oct 23Jan 24AprJulOctJan 25AprJulOctJan 26AprJul
Gas output held steady over the last 12 monthsMonthly gas production and oil for MATEJEK 01, Aug 2023 to Jul 2026. Gas output held steady over the last 12 months. 37,964 mcf in the 12 months through Jul 2026, against 38,159 mcf in the 12 months before.Last 12 monthsmcf per monthbbl per month002,0001004,0002006,0003008,000400Jan 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% · 36,994 mcf

  • Lease fuel (1)

    2.6% · 970 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
42-123-3369307HActive

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
42-123-3369307H683.36

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 Oil10102432360$80.46$2.89
Jun 2026Marathon Oil41411,8791,8260$84.81$3.15
May 2026Marathon Oil1471473,1563,0800$102.13$2.94
Apr 2026Marathon Oil1601603,0162,9190$100.32$2.77
Mar 2026Marathon Oil1411413,3273,2420$91.38$3.04
Feb 2026Marathon Oil1731732,4902,4320$64.51$3.62
Jan 2026Marathon Oil3043042,8932,8340$60.04$7.72
Dec 2025Marathon Oil3413415,3885,2560$57.97$4.26
Nov 2025Marathon Oil2192195,2965,1620$60.06$3.79
Oct 2025Marathon Oil1281283,3693,2740$60.89$3.19
Sep 2025Marathon Oil1981983,4643,3770$63.96$2.97
Aug 2025Marathon Oil2432433,4433,3560$64.86$2.91
Jul 2025Marathon Oil1261262,0141,9670$68.39$3.20
Jun 2025Marathon Oil2722723,6613,5720$68.17$3.02
May 2025Marathon Oil2862862,6882,6300$62.17$3.12
Apr 2025Marathon Oil2962963,3723,3070$63.54$3.42
Mar 2025Marathon Oil2092093,4693,4110$68.24$4.12
Feb 2025Marathon Oil3713713,8843,8350$71.53$4.19
Jan 2025Marathon Oil2332332,9512,9070$75.74$4.13
Dec 2024Marathon Oil2892892,5802,5280$70.12$3.01
Nov 2024Marathon Oil2872872,6752,6220$69.95$2.12
Oct 2024Marathon Oil2842844,3214,2390$71.99$2.20
Sep 2024Marathon Oil2062062,9262,8820$70.24$2.28
Aug 2024Marathon Oil2132133,6183,0220$76.68$1.99
Jul 2024Marathon Oil2712713,2832,7760$81.80$2.07
Jun 2024Marathon Oil2832833,4742,8670$79.77$2.54
May 2024Marathon Oil1411413,0922,5950$80.02$2.12
Apr 2024Marathon Oil2462463,1682,7000$85.35$1.60
Mar 2024Marathon Oil74746305260$81.28$1.49
Feb 2024Marathon Oil2422423,3512,7980$77.25$1.72
Jan 2024Marathon Oil1041041,1659900$74.15$3.18
Dec 2023Marathon Oil1821823,6873,1290$71.90$2.52
Nov 2023Marathon Oil1581583,0382,5820$77.69$2.71
Oct 2023Marathon Oil1461462,8942,4770$85.64$2.98
Sep 2023Marathon Oil1351352,6452,2260$89.43$2.64
Aug 2023Marathon Oil1611613,1412,6640$81.39$2.58

SourceTexas Railroad Commission Production Data Query, through Jul 2026. Prices: EIA, through Aug 2026. Updated Oct 2, 2026.

How to check your stub against this lease Checks stopped on this lease? See the likely reasons

Do your checks match this lease?

Check my statement

Nearby

This lease belongs to

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

Marathon Oil Ef LLC in De Witt County

All Marathon Oil Ef LLC leases →

De Witt (Eagle Ford Shale) field

All leases in this field →

Leases within 10 km

Drilling permits within 10 km