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Texas gas well

Producing

JANSSEN 01

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

1 well

3,954mcf gas, last 12 months−70% vs prior year
Operator
Marathon Oil Ef LLC
County
Karnes County
Field
Sugarkane (Eagle Ford)
RRC lease
02-268010

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Where it sits

This county

Karnes CountyKarnesAtascosaGoliadWilsonGonzalesDe WittBexarKarnes County
Karnes County
Oil, last 12 months
1,191 bbl
Gas in Jul 2026
461 mcf

Production by month

Gas output fell 70% over the last 12 months

  • Gas (bars)
  • Oil (line)
  • Last 12 months
Gas output fell 70% over the last 12 monthsMonthly gas production and oil for JANSSEN 01, Aug 2023 to Jul 2026. Gas output fell 70% over the last 12 months. 3,954 mcf in the 12 months through Jul 2026, against 13,366 mcf in the 12 months before.Last 12 months: 3,954 mcfmcf per monthbbl per month001,0002502,0005003,0007504,0001,000Oct 23Jan 24AprJulOctJan 25AprJulOctJan 26AprJul
Gas output fell 70% over the last 12 monthsMonthly gas production and oil for JANSSEN 01, Aug 2023 to Jul 2026. Gas output fell 70% over the last 12 months. 3,954 mcf in the 12 months through Jul 2026, against 13,366 mcf in the 12 months before.Last 12 monthsmcf per monthbbl per month001,0002502,0005003,0007504,0001,000Jan 24JulJan 25JulJan 26Jul

SourceTexas Railroad Commission Production Data Query, through Jul 2026.

Where the gas went

95% of the gas went to a processing plant in the last 12 months

  • Processing plant (3)
  • Lease fuel (1)
95% of the gas went to a processing plant in the last 12 monthsShare of JANSSEN 01 gas by disposition code each month, Aug 2023 to Jul 2026. 95% 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
95% of the gas went to a processing plant in the last 12 monthsShare of JANSSEN 01 gas by disposition code each month, Aug 2023 to Jul 2026. 95% 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)

    95% · 3,757 mcf

  • Lease fuel (1)

    5.0% · 197 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 JANSSEN 01
API numberWell no.Status
42-255-3243201HActive

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

324.13 acres on the newest permit

Check your decimal on this lease
Permits for Janssen 01
API numberWell no.Acreson the permit
42-255-3243201H324.13

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 JANSSEN 01
MonthOil producedbblOil soldbblGas producedmcfGas soldmcf, codes 2+3FlaredmcfWTI$/bblHenry Hub$/MMBtu
Jul 2026Marathon Oil1031034614320$80.46$2.89
Jun 2026Marathon Oil8208202572360$84.81$3.15
May 2026Marathon Oil3394870$102.13$2.94
Apr 2026Marathon Oil661321250$100.32$2.77
Mar 2026Marathon Oil38385625340$91.38$3.04
Feb 2026Marathon Oil45453493330$64.51$3.62
Jan 2026Marathon Oil661091030$60.04$7.72
Dec 2025Marathon Oil33880$57.97$4.26
Nov 2025Marathon Oil36364344150$60.06$3.79
Oct 2025Marathon Oil42424204020$60.89$3.19
Sep 2025Marathon Oil42425445220$63.96$2.97
Aug 2025Marathon Oil47475845600$64.86$2.91
Jul 2025Marathon Oil43433072960$68.39$3.20
Jun 2025Marathon Oil43434043930$68.17$3.02
May 2025Marathon Oil39391,3601,3210$62.17$3.12
Apr 2025Marathon Oil38381,1421,1080$63.54$3.42
Mar 2025Marathon Oil51511,9601,9080$68.24$4.12
Feb 2025Marathon Oil66661,0441,0210$71.53$4.19
Jan 2025Marathon Oil24245054940$75.74$4.13
Dec 2024Marathon Oil51517857670$70.12$3.01
Nov 2024Marathon Oil36362192150$69.95$2.12
Oct 2024Marathon Oil29291,6511,6260$71.99$2.20
Sep 2024Marathon Oil33332,3212,2890$70.24$2.28
Aug 2024Marathon Oil38381,6681,6490$76.68$1.99
Jul 2024Marathon Oil59591,4291,4090$81.80$2.07
Jun 2024Marathon Oil62626125950$79.77$2.54
May 2024Marathon Oil81812,8742,7340$80.02$2.12
Apr 2024Marathon Oil1001003,3193,2510$85.35$1.60
Mar 2024Marathon Oil81812,5022,4480$81.28$1.49
Feb 2024Marathon Oil51511,0701,0470$77.25$1.72
Jan 2024Marathon Oil77779088920$74.15$3.18
Dec 2023Marathon Oil49493073020$71.90$2.52
Nov 2023Marathon Oil53533433380$77.69$2.71
Oct 2023Marathon Oil71714464400$85.64$2.98
Sep 2023Marathon Oil33337917810$89.43$2.64
Aug 2023Marathon Oil49493083050$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 LLCFieldSugarkane (Eagle Ford)CountyKarnes County

Marathon Oil Ef LLC in Karnes County

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Sugarkane (Eagle Ford) field

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