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Texas oil lease

Producing

DEMING-HERBERN SA1

Deming-Herbern Sa1 is an oil lease in Karnes County, Texas, operated by Marathon Oil Ef LLC in the Sugarkane (Eagle Ford) field.

1 well

43,300bbl oil, last 12 months
Operator
Marathon Oil Ef LLC
County
Karnes County
Field
Sugarkane (Eagle Ford)
RRC lease
02-12918

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Where it sits

This county

Karnes CountyKarnesAtascosaGoliadWilsonGonzalesDe WittBexarKarnes County
Karnes County
Gas, last 12 months
562,737 mcf
Oil in Jul 2026
2,222 bbl

Production by month

Oil output fell 87% since Sep 2024

  • Oil (bars)
  • Gas (line)
  • Last 12 months
Oil output fell 87% since Sep 2024Monthly oil production and gas for DEMING-HERBERN SA1, Sep 2024 to Jul 2026. Oil output fell 87% since Sep 2024. Monthly average of 2,179 bbl in the latest 3 months, against 16,684 bbl in the first 3.Last 12 months: 43,300 bblbbl per monthmcf per month0010k50k20k100k30k150k40k200k50k250kOct 24Jan 25AprJulOctJan 26AprJul
Oil output fell 87% since Sep 2024Monthly oil production and gas for DEMING-HERBERN SA1, Sep 2024 to Jul 2026. Oil output fell 87% since Sep 2024. Monthly average of 2,179 bbl in the latest 3 months, against 16,684 bbl in the first 3.Last 12 monthsbbl per monthmcf per month0010k50k20k100k30k150k40k200k50k250kJan 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 DEMING-HERBERN SA1 gas by disposition code each month, Sep 2024 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 24Jan 25AprJulOctJan 26AprJul
All of the gas went to a processing plant in the last 12 monthsShare of DEMING-HERBERN SA1 gas by disposition code each month, Sep 2024 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 25JulJan 26Jul

SourceTexas Railroad Commission Production Data Query, through Jul 2026.

1 well on this lease

Wells on DEMING-HERBERN SA1
API numberWell no.Status
42-255-380531HActive

SourceTexas Railroad Commission Wellbore Query.

Buyers and gatherers

Companies named on the Form P-4, by product
CompanyProductRoleShare%From
Enterprise Crude Oil LLCOilGathers50Sep 30, 2024
Enterprise Crude Pipeline LLCOilGathers50Sep 30, 2024
Marathon Oil Ef LLCCasinghead gasBuys100Sep 30, 2024
Marathon Oil Ef LLCCasinghead gasGathers100Sep 30, 2024

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

Who buys my oilOil price check

1,458.10 acres on the newest permit

  • Worth asking

    An allocation well is on this lease

    A well drilled across several tracts shares its production by an allocation formula, so the decimal is not always your acres over the unit acres. Ask the operator for the allocation formula and the tract factor for your land.

  • Worth asking

    A Rule 37 case is listed

    The RRC permit records list a Rule 37 case. This does not establish your royalty share. Ask for the permit and unit plat for your well.

Check your decimal on this lease
Permits for Deming-Herbern Sa1
API numberWell no.Acreson the permit
42-255-380531H1,458.10

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

23 months, newest first

Ledger for DEMING-HERBERN SA1
MonthOil producedbblOil soldbblGas producedmcfGas soldmcf, codes 2+3FlaredmcfWTI$/bblHenry Hub$/MMBtu
Jul 20262,2222,22230,85530,8550$80.46$2.89
Jun 20261,5401,54023,68423,6840$84.81$3.15
May 20262,7762,77639,40539,4050$102.13$2.94
Apr 20262,7692,76942,56542,5650$100.32$2.77
Mar 20262,9422,94243,50243,5020$91.38$3.04
Feb 20263,1183,11844,17444,1740$64.51$3.62
Jan 20263,9963,99649,56149,5610$60.04$7.72
Dec 20254,3024,30254,13154,1310$57.97$4.26
Nov 20254,6294,62953,05753,0570$60.06$3.79
Oct 20254,7754,77559,88359,8830$60.89$3.19
Sep 20253,8773,87749,98249,9820$63.96$2.97
Aug 20256,3546,35471,93871,9380$64.86$2.91
Jul 20256,5176,51781,28581,2850$68.39$3.20
Jun 20256,3006,30088,59788,5970$68.17$3.02
May 20258,0608,060103,866103,8660$62.17$3.12
Apr 202511,94411,944117,123117,1230$63.54$3.42
Mar 202512,58212,582142,951142,9510$68.24$4.12
Feb 202514,33614,336149,673149,6730$71.53$4.19
Jan 202517,10317,103164,248164,2480$75.74$4.13
Dec 202419,92919,929204,700204,7000$70.12$3.01
Nov 202425,04325,043226,414226,4140$69.95$2.12
Oct 202424,91524,915228,374228,3740$71.99$2.20
Sep 202494941,0321,0320$70.24$2.28

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 LLCFieldSugarkane (Eagle Ford)CountyKarnes County

Marathon Oil Ef LLC in Karnes County

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Sugarkane (Eagle Ford) field

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