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Texas oil lease

Producing

MCS FOUNDATION UNIT

MCS Foundation Unit is an oil lease in Atascosa County, Texas, operated by Marathon Oil Ef LLC in the Eagleville (Eagle Ford-1) field.

3 wells

384,325bbl oil, last 12 months
Operator
Marathon Oil Ef LLC
County
Atascosa County
Field
Eagleville (Eagle Ford-1)
RRC lease
01-21791

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Where it sits

This county

Atascosa CountyAtascosaWilsonMedinaKarnesFrioBexarAtascosa County
Atascosa County
Gas, last 12 months
437,213 mcf
Oil in Jul 2026
13,411 bbl

Production by month

Oil output fell 73% since Jul 2025

  • Oil (bars)
  • Gas (line)
Oil output fell 73% since Jul 2025Monthly oil production and gas for MCS FOUNDATION UNIT, Jul 2025 to Jul 2026. Oil output fell 73% since Jul 2025. Monthly average of 16,343 bbl in the latest 3 months, against 61,663 bbl in the first 3.bbl per monthmcf per month0025k20k50k40k75k60k100k80kJul 25OctJan 26AprJul
Oil output fell 73% since Jul 2025Monthly oil production and gas for MCS FOUNDATION UNIT, Jul 2025 to Jul 2026. Oil output fell 73% since Jul 2025. Monthly average of 16,343 bbl in the latest 3 months, against 61,663 bbl in the first 3.bbl per monthmcf per month0025k20k50k40k75k60k100k80kJul 25Jan 26Jul

SourceTexas Railroad Commission Production Data Query, through Jul 2026.

Where the gas went

86% of the gas went to a processing plant in the last 12 months

Flaring peaked at 3.8% of the gas in Jul 2025.

  • Processing plant (3)
  • Lease fuel (1)
  • Flared (4)
86% of the gas went to a processing plant in the last 12 monthsShare of MCS FOUNDATION UNIT gas by disposition code each month, Jul 2025 to Jul 2026. 86% of the gas went to a processing plant in the last 12 months. Flaring peaked at 3.8% of the gas in Jul 2025.Share of the lease’s gas by disposition code, per month0%50%100%Flared 3.8%Jul 25OctJan 26AprJul
86% of the gas went to a processing plant in the last 12 monthsShare of MCS FOUNDATION UNIT gas by disposition code each month, Jul 2025 to Jul 2026. 86% of the gas went to a processing plant in the last 12 months. Flaring peaked at 3.8% of the gas in Jul 2025.Share of gas by disposition code0%50%100%Flared 3.8%Jul 25Jan 26Jul

SourceTexas Railroad Commission Production Data Query, through Jul 2026.

  • Processing plant (3)

    86% · 375,639 mcf

  • Lease fuel (1)

    13% · 55,291 mcf

  • Flared (4)

    1.4% · 6,283 mcf

1.4% of the gas flared in the last 12 months. 2 months above 3%.

3 wells on this lease

Wells on MCS FOUNDATION UNIT
API numberWell no.Status
42-013-362207HActive
42-013-362218HActive
42-013-362229HActive

SourceTexas Railroad Commission Wellbore Query.

Buyers and gatherers

Companies named on the Form P-4, by product
CompanyProductRoleShare%From
Statewide Crude Inc.OilGathers90Jul 19, 2025
Gulfmark Energy, Inc.OilGathers10Jul 19, 2025
Marathon Oil Ef LLCCasinghead gasBuys100Jul 19, 2025
Marathon Oil Ef LLCCasinghead gasGathers100Jul 19, 2025

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

Who buys my oilOil price check

2,141.85 acres on the newest permit

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Permits for MCS Foundation Unit
API numberWell no.Acreson the permit
42-013-362207H2,141.85
42-013-362218H2,141.85
42-013-362229H2,141.85

SourceRailroad Commission drilling permits, Sep 26, 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

13 months, newest first

Ledger for MCS FOUNDATION UNIT
MonthOil producedbblOil soldbblGas producedmcfGas soldmcf, codes 2+3FlaredmcfWTI$/bblHenry Hub$/MMBtu
Jul 202613,41113,75819,77817,034159$80.46$2.89
Jun 202615,42315,50114,40512,411151$84.81$3.15
May 202620,19420,19827,09523,710218$102.13$2.94
Apr 202618,89718,87924,62921,138247$100.32$2.77
Mar 202622,18322,07532,49128,498241$91.38$3.04
Feb 202621,50421,42931,55227,321239$64.51$3.62
Jan 202625,94226,13134,04229,864221$60.04$7.72
Dec 202530,60630,56236,37531,092230$57.97$4.26
Nov 202535,46335,54845,76539,906251$60.06$3.79
Oct 202544,43244,28848,51741,625635$60.89$3.19
Sep 202552,69053,07751,50843,2761,146$63.96$2.97
Aug 202583,58083,38371,05659,7642,545$64.86$2.91
Jul 202548,71847,97737,18529,3651,396$68.39$3.20

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

OperatorMarathon Oil Ef LLCFieldEagleville (Eagle Ford-1)CountyAtascosa County

Marathon Oil Ef LLC in Atascosa County

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