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Texas gas well

Producing

JO ANN MUELLER 01

Jo Ann Mueller 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

6,869mcf gas, last 12 months−24% vs prior year
Operator
Marathon Oil Ef LLC
County
De Witt County
Field
De Witt (Eagle Ford Shale)
RRC lease
02-268658

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Where it sits

This county

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

Production by month

Gas output fell 24% over the last 12 months

  • Gas (bars)
  • Oil (line)
  • Last 12 months
Gas output fell 24% over the last 12 monthsMonthly gas production and oil for JO ANN MUELLER 01, Aug 2023 to Jul 2026. Gas output fell 24% over the last 12 months. 6,869 mcf in the 12 months through Jul 2026, against 9,005 mcf in the 12 months before.Last 12 months: 6,869 mcfmcf per monthbbl per month00500101,000201,500302,00040Oct 23Jan 24AprJulOctJan 25AprJulOctJan 26AprJul
Gas output fell 24% over the last 12 monthsMonthly gas production and oil for JO ANN MUELLER 01, Aug 2023 to Jul 2026. Gas output fell 24% over the last 12 months. 6,869 mcf in the 12 months through Jul 2026, against 9,005 mcf in the 12 months before.Last 12 monthsmcf per monthbbl per month00500101,000201,500302,00040Jan 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 JO ANN MUELLER 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 JO ANN MUELLER 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 JO ANN MUELLER 01
API numberWell no.Status
42-123-3271801HActive

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

539.67 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 Jo Ann Mueller 01
API numberWell no.Acreson the permit
42-123-3271801H539.67

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 JO ANN MUELLER 01
MonthOil producedbblOil soldbblGas producedmcfGas soldmcf, codes 2+3FlaredmcfWTI$/bblHenry Hub$/MMBtu
Jul 2026Marathon Oil006296290$80.46$2.89
Jun 2026Marathon Oil13131,2411,2410$84.81$3.15
May 2026Marathon Oil224394390$102.13$2.94
Apr 2026Marathon Oil779009000$100.32$2.77
Mar 2026Marathon Oil19197827820$91.38$3.04
Feb 2026Marathon Oil554634630$64.51$3.62
Jan 2026Marathon Oil32329359350$60.04$7.72
Dec 2025Marathon Oil001291290$57.97$4.26
Nov 2025Marathon Oil002222220$60.06$3.79
Oct 2025Marathon Oil002972970$60.89$3.19
Sep 2025Marathon Oil003713710$63.96$2.97
Aug 2025Marathon Oil114614610$64.86$2.91
Jul 2025Marathon Oil115795790$68.39$3.20
Jun 2025Marathon Oil336496490$68.17$3.02
May 2025Marathon Oil15151,3351,3350$62.17$3.12
Apr 2025Marathon Oil22228408400$63.54$3.42
Mar 2025Marathon Oil002472470$68.24$4.12
Feb 2025Marathon Oil007117110$71.53$4.19
Jan 2025Marathon Oil004734730$75.74$4.13
Dec 2024Marathon Oil005815810$70.12$3.01
Nov 2024Marathon Oil116496490$69.95$2.12
Oct 2024Marathon Oil771,2821,2820$71.99$2.20
Sep 2024Marathon Oil38381,3651,3650$70.24$2.28
Aug 2024Marathon Oil002942940$76.68$1.99
Jul 2024Marathon Oil004474470$81.80$2.07
Jun 2024Marathon Oil0062620$79.77$2.54
May 2024Marathon Oil0073730$80.02$2.12
Apr 2024Marathon Oil002672670$85.35$1.60
Mar 2024Marathon Oil555155150$81.28$1.49
Feb 2024Marathon Oil11113303300$77.25$1.72
Jan 2024Marathon Oil113893890$74.15$3.18
Dec 2023Marathon Oil111,3221,3220$71.90$2.52
Nov 2023Marathon Oil551,0901,0900$77.69$2.71
Oct 2023Marathon Oil338648640$85.64$2.98
Sep 2023Marathon Oil117607600$89.43$2.64
Aug 2023Marathon Oil338798790$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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