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Producing

MUMME-CEARLEY B UNIT

Mumme-Cearley B Unit is an oil lease in La Salle County, Texas, operated by Verdun Oil Ef II LLC in the Eagleville (Eagle Ford-1) field.

1 well

2,751bbl oil, last 12 months−23% vs prior year
Operator
Verdun Oil Ef II LLC
County
La Salle County
Field
Eagleville (Eagle Ford-1)
RRC lease
01-15991

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Where it sits

This county

La Salle CountyLa SalleZavalaAtascosaMcMullenDimmitFrioLa Salle County
La Salle County
Gas, last 12 months
2,312 mcf
Oil in Jul 2026
285 bbl

Checks stopped on this lease?

  • Operator

    Operator changed: Verdun Oil Ef II LLC took over from Ep Energy E&P Company, LLC in Mar 2025.

  • P-5

    The previous operator's P-5 registration is listed as inactive since Nov 17, 2025 (last P-5 filed Mar 20, 2025).

SourceRailroad Commission production, P-5 and P-4 records, data through Jul 2026.

See why checks stop on this lease

Production by month

Oil output fell 23% over the last 12 months

  • Oil (bars)
  • Gas (line)
  • Last 12 months
Oil output fell 23% over the last 12 monthsMonthly oil production and gas for MUMME-CEARLEY B UNIT, Aug 2023 to Jul 2026. Oil output fell 23% over the last 12 months. 2,751 bbl in the 12 months through Jul 2026, against 3,556 bbl in the 12 months before.Last 12 months: 2,751 bblbbl per monthmcf per month001002002004003006004008005001,000Oct 23Jan 24AprJulOctJan 25AprJulOctJan 26AprJul
Oil output fell 23% over the last 12 monthsMonthly oil production and gas for MUMME-CEARLEY B UNIT, Aug 2023 to Jul 2026. Oil output fell 23% over the last 12 months. 2,751 bbl in the 12 months through Jul 2026, against 3,556 bbl in the 12 months before.Last 12 monthsbbl per monthmcf per month001002002004003006004008005001,000Jan 24JulJan 25JulJan 26Jul

SourceTexas Railroad Commission Production Data Query, through Jul 2026.

Where the gas went

59% of the gas went to a transmission line in the last 12 months

Flaring peaked at 13.8% of the gas in Mar 2026.

  • Transmission line (2)
  • Lease fuel (1)
  • Flared (4)
59% of the gas went to a transmission line in the last 12 monthsShare of MUMME-CEARLEY B UNIT gas by disposition code each month, Aug 2023 to Jul 2026. 59% of the gas went to a transmission line in the last 12 months. Flaring peaked at 13.8% of the gas in Mar 2026.Share of the lease’s gas by disposition code, per month0%50%100%Flared 13.8%Oct 23Jan 24AprJulOctJan 25AprJulOctJan 26AprJul
59% of the gas went to a transmission line in the last 12 monthsShare of MUMME-CEARLEY B UNIT gas by disposition code each month, Aug 2023 to Jul 2026. 59% of the gas went to a transmission line in the last 12 months. Flaring peaked at 13.8% of the gas in Mar 2026.Share of gas by disposition code0%50%100%Flared 13.8%Jan 24JulJan 25JulJan 26Jul

SourceTexas Railroad Commission Production Data Query, through Jul 2026.

  • Transmission line (2)

    59% · 1,360 mcf

  • Lease fuel (1)

    38% · 881 mcf

  • Flared (4)

    3.1% · 71 mcf

3.1% of the gas flared in the last 12 months. 10 months above 3%.

Who has run this lease

The operator changed 2 times, most recently in Mar 2025

Operators of this lease over timeEp Energy E&P Company, L.P., Jan 2020 to Apr 2022; Ep Energy E&P Company, LLC, May 2022 to Feb 2025; Verdun Oil Ef II LLC, Mar 2025 to Jul 20262020202120222023202420252026Changed May 2022Changed Mar 2025Ep Energy E&P Company, L.P.Jan 2020 to Apr 2022Ep Energy E&P Company, LLCMay 2022 to Feb 2025Verdun Oil Ef II LLCMar 2025 to now
Operators of this lease over timeEp Energy E&P Company, L.P., Jan 2020 to Apr 2022; Ep Energy E&P Company, LLC, May 2022 to Feb 2025; Verdun Oil Ef II LLC, Mar 2025 to Jul 20262020202120222023202420252026Changed May 2022Changed Mar 2025Ep Energy E&P Company, L.P.Jan 2020 to Apr 2022Ep Energy E&P Company, LLCMay 2022 to Feb 2025Verdun Oil Ef II LLCMar 2025 to now

SourceTexas Railroad Commission Production Data Query, through Jul 2026.

1 well on this lease

Wells on MUMME-CEARLEY B UNIT
API numberWell no.Status
42-283-3321836HActive

SourceTexas Railroad Commission Wellbore Query.

Buyers and gatherers

Companies named on the Form P-4, by product
CompanyProductRoleShare%FromUntil
Eastex Crude CompanyOilGathers17May 1, 2021–
Gulfmark Energy, Inc.OilGathers17May 1, 2021–
Mission Petroleum Carriers, Inc.OilGathers17May 1, 2021–
Tartan Oil LLCOilGathers17May 1, 2021–
Camino Real Gathering Co. L.l.c.OilGathers16May 1, 2021–
Firebird Bulk Carriers, Inc.OilGathers16May 1, 2021–
Bp Energy Co.Casinghead gasBuys15May 1, 2021–
Enterprise Products Operating LLCCasinghead gasBuys15May 1, 2021–
Marathon Petroleum Company LPCasinghead gasBuys15May 1, 2021–
Tenaska Marketing VenturesCasinghead gasBuys15May 1, 2021–
Conocophillips CompanyCasinghead gasBuys10May 1, 2021–
Dcp Operating Company, LPCasinghead gasBuys10May 1, 2021–
Enerfin Field Services LLCCasinghead gasBuys10May 1, 2021–
Kinder Morgan Texas Pipeline LLCCasinghead gasBuys10May 1, 2021–
Eagle Ford Gathering LLCCasinghead gasGathers34May 1, 2021–
Camino Real Gathering Co. L.l.c.Casinghead gasGathers33May 1, 2021–
Southcross Gathering Ltd.Casinghead gasGathers33May 1, 2021–
Dcp Operating Company, LPCasinghead gasGathers100Feb 1, 2018May 1, 2021
Dcp Operating Company, LPCasinghead gasBuys100Feb 1, 2018May 1, 2021
Eastex Crude CompanyOilGathers50Feb 1, 2018May 1, 2021
Shell Trading (Us) CompanyOilGathers50Feb 1, 2018May 1, 2021

SourceRailroad Commission Form P-4 file, Sep 24, 2026 (source).

Who buys my oilOil price check

134 acres on the newest permit

Check your decimal on this lease
Permits for Mumme-Cearley B Unit
API numberWell no.Acreson the permit
42-283-3321836H134

SourceRailroad Commission drilling permits, Oct 3, 2026 (source 1, source 2).

Unit decimal checker

Estimate your royalty

36 months, newest first

Ledger for MUMME-CEARLEY B UNIT
MonthOil producedbblOil soldbblGas producedmcfGas soldmcf, codes 2+3FlaredmcfWTI$/bblHenry Hub$/MMBtu
Jul 2026Verdun Oil2852842521524$80.46$2.89
Jun 2026Verdun Oil3723841881047$84.81$3.15
May 2026Verdun Oil3012085713395$102.13$2.94
Apr 2026Verdun Oil8313736223$100.32$2.77
Mar 2026Verdun Oil19422958278$91.38$3.04
Feb 2026Verdun Oil24924220610410$64.51$3.62
Jan 2026Verdun Oil28931785432$60.04$7.72
Dec 2025Verdun Oil2581952001112$57.97$4.26
Nov 2025Verdun Oil274220157981$60.06$3.79
Oct 2025Verdun Oil641052471674$60.89$3.19
Sep 2025Verdun Oil23526525015519$63.96$2.97
Aug 2025Verdun Oil14714762386$64.86$2.91
Jul 2025Verdun Oil16521524416512$68.39$3.20
Jun 2025Verdun Oil2962931811272$68.17$3.02
May 2025Verdun Oil324268142984$62.17$3.12
Apr 2025Verdun Oil2983202371623$63.54$3.42
Mar 2025Verdun Oil3853282741708$68.24$4.12
Feb 2025Ep Energy22526687584$71.53$4.19
Jan 2025Ep Energy315339143992$75.74$4.13
Dec 2024Ep Energy3503741801194$70.12$3.01
Nov 2024Ep Energy3042432982182$69.95$2.12
Oct 2024Ep Energy33837872550710$71.99$2.20
Sep 2024Ep Energy33736480758923$70.24$2.28
Aug 2024Ep Energy21915383858937$76.68$1.99
Jul 2024Ep Energy32531277753925$81.80$2.07
Jun 2024Ep Energy2753167485487$79.77$2.54
May 2024Ep Energy3282908856364$80.02$2.12
Apr 2024Ep Energy3123589056658$85.35$1.60
Mar 2024Ep Energy351285000$81.28$1.49
Feb 2024Ep Energy2382663852732$77.25$1.72
Jan 2024Ep Energy260286102780$74.15$3.18
Dec 2023Ep Energy3363242271730$71.90$2.52
Nov 2023Ep Energy3283761881432$77.69$2.71
Oct 2023Ep Energy379411000$85.64$2.98
Sep 2023Ep Energy461413000$89.43$2.64
Aug 2023Ep Energy318310000$81.39$2.58

Flared above 3%

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

OperatorVerdun Oil Ef II LLCFieldEagleville (Eagle Ford-1)CountyLa Salle County

Verdun Oil Ef II LLC in La Salle County

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Eagleville (Eagle Ford-1) field

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