Skip to content
Royalty Clerk

Texas gas well

Producing

NANCY STEWART 01

Nancy Stewart 01 is a gas well in Karnes County, Texas, operated by Marathon Oil Ef LLC in the Sugarkane (Eagle Ford) field.

1 well

10,378mcf gas, last 12 months−16% vs prior year
Operator
Marathon Oil Ef LLC
County
Karnes County
Field
Sugarkane (Eagle Ford)
RRC lease
02-259861

Is your check right?

Check my statement

Where it sits

This county

Karnes CountyKarnesAtascosaGoliadWilsonGonzalesDe WittBexarKarnes County
Karnes County
Oil, last 12 months
1,567 bbl
Gas in Jul 2026
1,590 mcf

Production by month

Gas output fell 16% over the last 12 months

  • Gas (bars)
  • Oil (line)
  • Last 12 months
Gas output fell 16% over the last 12 monthsMonthly gas production and oil for NANCY STEWART 01, Aug 2023 to Jul 2026. Gas output fell 16% over the last 12 months. 10,378 mcf in the 12 months through Jul 2026, against 12,335 mcf in the 12 months before.Last 12 months: 10,378 mcfmcf per monthbbl per month005001001,0002001,5003002,0004002,500500Oct 23Jan 24AprJulOctJan 25AprJulOctJan 26AprJul
Gas output fell 16% over the last 12 monthsMonthly gas production and oil for NANCY STEWART 01, Aug 2023 to Jul 2026. Gas output fell 16% over the last 12 months. 10,378 mcf in the 12 months through Jul 2026, against 12,335 mcf in the 12 months before.Last 12 monthsmcf per monthbbl per month005001001,0002001,5003002,0004002,500500Jan 24JulJan 25JulJan 26Jul

SourceTexas Railroad Commission Production Data Query, through Jul 2026.

Where the gas went

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

All of the gas went to a processing plant in the last 12 monthsShare of NANCY STEWART 01 gas by disposition code each month, Aug 2023 to Jul 2026. All 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
All of the gas went to a processing plant in the last 12 monthsShare of NANCY STEWART 01 gas by disposition code each month, Aug 2023 to Jul 2026. All 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.

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 NANCY STEWART 01
API numberWell no.Status
42-255-3171501HActive

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

703.78 acres on the newest permit

Check your decimal on this lease
Permits for Nancy Stewart 01
API numberWell no.Acreson the permit
42-255-3171501H703.78

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 NANCY STEWART 01
MonthOil producedbblOil soldbblGas producedmcfGas soldmcf, codes 2+3FlaredmcfWTI$/bblHenry Hub$/MMBtu
Jul 2026Marathon Oil1731731,5901,5900$80.46$2.89
Jun 2026Marathon Oil1761761,6121,6120$84.81$3.15
May 2026Marathon Oil2722721,9401,9400$102.13$2.94
Apr 2026Marathon Oil55553063060$100.32$2.77
Mar 2026Marathon Oil9924240$91.38$3.04
Feb 2026Marathon Oil00000$64.51$3.62
Jan 2026Marathon Oil1131131,1861,1860$60.04$7.72
Dec 2025Marathon Oil2662661,3711,3710$57.97$4.26
Nov 2025Marathon Oil1701703453450$60.06$3.79
Oct 2025Marathon Oil1871877087080$60.89$3.19
Sep 2025Marathon Oil77777137130$63.96$2.97
Aug 2025Marathon Oil69695835830$64.86$2.91
Jul 2025Marathon Oil92927247240$68.39$3.20
Jun 2025Marathon Oil75756306300$68.17$3.02
May 2025Marathon Oil1261265945940$62.17$3.12
Apr 2025Marathon Oil1991994494490$63.54$3.42
Mar 2025Marathon Oil1661667847840$68.24$4.12
Feb 2025Marathon Oil2402401,2951,2950$71.53$4.19
Jan 2025Marathon Oil1641641,1691,1690$75.74$4.13
Dec 2024Marathon Oil2122121,6991,6990$70.12$3.01
Nov 2024Marathon Oil1931931,6241,6240$69.95$2.12
Oct 2024Marathon Oil2082081,7381,7380$71.99$2.20
Sep 2024Marathon Oil2122127657650$70.24$2.28
Aug 2024Marathon Oil2142148648640$76.68$1.99
Jul 2024Marathon Oil2102108148140$81.80$2.07
Jun 2024Marathon Oil2252259009000$79.77$2.54
May 2024Marathon Oil1951958688680$80.02$2.12
Apr 2024Marathon Oil2292291,8121,8120$85.35$1.60
Mar 2024Marathon Oil2512511,9601,9600$81.28$1.49
Feb 2024Marathon Oil2832832,0422,0420$77.25$1.72
Jan 2024Marathon Oil3103102,1272,1270$74.15$3.18
Dec 2023Marathon Oil3103102,0612,0610$71.90$2.52
Nov 2023Marathon Oil00000$77.69$2.71
Oct 2023Marathon Oil00000$85.64$2.98
Sep 2023Marathon Oil1921927757750$89.43$2.64
Aug 2023Marathon Oil1821826576570$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 LLCFieldSugarkane (Eagle Ford)CountyKarnes County

Marathon Oil Ef LLC in Karnes County

All Marathon Oil Ef LLC leases →

Sugarkane (Eagle Ford) field

All leases in this field →

Leases within 10 km

Drilling permits within 10 km