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BARNHART (EF) A

Barnhart (Ef) A is an oil lease in Gonzales County, Texas, operated by Marathon Oil Ef LLC in the Eagleville (Eagle Ford-1) field.

2 wells

411bbl oil, last 12 months−84% vs prior year
Operator
Marathon Oil Ef LLC
County
Gonzales County
Field
Eagleville (Eagle Ford-1)
RRC lease
01-16380

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Where it sits

This county

Gonzales CountyGonzalesWilsonLavacaFayetteCaldwellBastropDe WittHaysGuadalupeGonzales County
Gonzales County
Gas, last 12 months
288 mcf
Oil in Jul 2026
0 bbl

Checks stopped on this lease?

  • Buyer

    Buyer changed: ENSIGN NATURAL RESOURCES II LLC replaced MARATHON OIL EF LLC as the buyer of this lease's gas from oil wells on Sep 1, 2026.

  • Sales

    No sales reported for the last 9 months of state data (through Jul 2026).

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

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Production by month

Oil output fell 84% over the last 12 months

  • Oil (bars)
  • Gas (line)
  • Last 12 months
Oil output fell 84% over the last 12 monthsMonthly oil production and gas for BARNHART (EF) A, Aug 2023 to Jul 2026. Oil output fell 84% over the last 12 months. 411 bbl in the 12 months through Jul 2026, against 2,633 bbl in the 12 months before.Last 12 months: 411 bblbbl per monthmcf per month002505005001,0007501,5001,0002,0001,2502,500Oct 23Jan 24AprJulOctJan 25AprJulOctJan 26AprJul
Oil output fell 84% over the last 12 monthsMonthly oil production and gas for BARNHART (EF) A, Aug 2023 to Jul 2026. Oil output fell 84% over the last 12 months. 411 bbl in the 12 months through Jul 2026, against 2,633 bbl in the 12 months before.Last 12 monthsbbl per monthmcf per month002505005001,0007501,5001,0002,0001,2502,500Jan 24JulJan 25JulJan 26Jul

SourceTexas Railroad Commission Production Data Query, through Jul 2026.

Where the gas went

90% of the gas went to a processing plant in the last 12 months

Flaring peaked at 3.6% of the gas in Aug 2025.

  • Processing plant (3)
  • Lease fuel (1)
  • Flared (4)
90% of the gas went to a processing plant in the last 12 monthsShare of BARNHART (EF) A gas by disposition code each month, Aug 2023 to Jul 2026. 90% of the gas went to a processing plant in the last 12 months. Flaring peaked at 3.6% of the gas in Aug 2025.Share of the lease’s gas by disposition code, per month0%50%100%Flared 3.6%Oct 23Jan 24AprJulOctJan 25AprJulOctJan 26AprJul
90% of the gas went to a processing plant in the last 12 monthsShare of BARNHART (EF) A gas by disposition code each month, Aug 2023 to Jul 2026. 90% of the gas went to a processing plant in the last 12 months. Flaring peaked at 3.6% of the gas in Aug 2025.Share of gas by disposition code0%50%100%Flared 3.6%Jan 24JulJan 25JulJan 26Jul

SourceTexas Railroad Commission Production Data Query, through Jul 2026.

  • Processing plant (3)

    90% · 1,691 mcf

  • Lease fuel (1)

    8.3% · 156 mcf

  • Flared (4)

    1.5% · 28 mcf

1.5% of the gas flared in the last 12 months. 2 months above 3%.

2 wells on this lease

Wells on BARNHART (EF) A
API numberWell no.Status
42-177-326381HShut-in
42-177-326402HShut-in

SourceTexas Railroad Commission Wellbore Query.

Buyers and gatherers

Companies named on the Form P-4, by product
CompanyProductRoleShare%FromUntil
Mv Purchasing, LLCOilGathers34Sep 1, 2026–
Plains Marketing, L.p.OilGathers33Sep 1, 2026–
Shell Trading (Us) CompanyOilGathers33Sep 1, 2026–
Ensign Natural Resources II LLCCasinghead gasBuys100Sep 1, 2026–
Ensign Natural Resources II LLCCasinghead gasGathers100Sep 1, 2026–
Marathon Oil Ef LLCCasinghead gasGathers100Dec 5, 2012Sep 1, 2026
Marathon Oil Ef LLCCasinghead gasBuys100Dec 5, 2012Sep 1, 2026
Enterprise Crude Oil LLCOilGathers20Sep 1, 2022Sep 1, 2026
Phillips 66 CompanyOilGathers10Sep 1, 2022Sep 1, 2026
Reynolds Energy Transport LLCOilGathers10Sep 1, 2022Sep 1, 2026
Sentinel Transportation, LLCOilGathers10Sep 1, 2022Sep 1, 2026

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

Who buys my oilOil price check

210.36 acres on the newest permit

Check your decimal on this lease
Permits for Barnhart (Ef) A
API numberWell no.Acreson the permit
42-177-326381H210.36
42-177-326402H210.36

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 BARNHART (EF) A
MonthOil producedbblOil soldbblGas producedmcfGas soldmcf, codes 2+3FlaredmcfWTI$/bblHenry Hub$/MMBtu
Jul 202600000$80.46$2.89
Jun 202600000$84.81$3.15
May 202600000$102.13$2.94
Apr 202600000$100.32$2.77
Mar 202600000$91.38$3.04
Feb 202600000$64.51$3.62
Jan 202600000$60.04$7.72
Dec 202500000$57.97$4.26
Nov 202500000$60.06$3.79
Oct 202501000$60.89$3.19
Sep 202510110564552$63.96$2.97
Aug 20253103082241918$64.86$2.91
Jul 20252142131831651$68.39$3.20
Jun 202510510676681$68.17$3.02
May 20252522513833453$62.17$3.12
Apr 20252712702562323$63.54$3.42
Mar 20251321331311202$68.24$4.12
Feb 20252192241081011$71.53$4.19
Jan 2025358355104961$75.74$4.13
Dec 20243443402352164$70.12$3.01
Nov 202445550$69.95$2.12
Oct 2024104107106972$71.99$2.20
Sep 202432132257552515$70.24$2.28
Aug 20243093085144735$76.68$1.99
Jul 20243293294133815$81.80$2.07
Jun 20243363353703405$79.77$2.54
May 20243313322932693$80.02$2.12
Apr 20244324311,4571,35612$85.35$1.60
Mar 20243633621,7191,60911$81.28$1.49
Feb 20242502521,4421,3566$77.25$1.72
Jan 20243213181,1241,05310$74.15$3.18
Dec 20232312359068525$71.90$2.52
Nov 20238868941,6031,5155$77.69$2.71
Oct 20231,0311,0261,7731,6709$85.64$2.98
Sep 20238368341,6051,50916$89.43$2.64
Aug 20236566561,2961,21112$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

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

Marathon Oil Ef LLC in Gonzales County

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Eagleville (Eagle Ford-1) field

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