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Producing

BARNHART (EF) C-E SA 1

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

1 well

10,051bbl oil, last 12 months−57% vs prior year
Operator
Marathon Oil Ef LLC
County
Gonzales County
Field
Eagleville (Eagle Ford-1)
RRC lease
01-20395

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Where it sits

This county

Gonzales CountyGonzalesWilsonLavacaFayetteCaldwellBastropDe WittHaysGuadalupeGonzales County
Gonzales County
Gas, last 12 months
15,977 mcf
Oil in Jul 2026
884 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.

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 57% over the last 12 months

  • Oil (bars)
  • Gas (line)
  • Last 12 months
Oil output fell 57% over the last 12 monthsMonthly oil production and gas for BARNHART (EF) C-E SA 1, Aug 2023 to Jul 2026. Oil output fell 57% over the last 12 months. 10,051 bbl in the 12 months through Jul 2026, against 23,156 bbl in the 12 months before.Last 12 months: 10,051 bblbbl per monthmcf per month001,0002,0002,0004,0003,0006,0004,0008,000Oct 23Jan 24AprJulOctJan 25AprJulOctJan 26AprJul
Oil output fell 57% over the last 12 monthsMonthly oil production and gas for BARNHART (EF) C-E SA 1, Aug 2023 to Jul 2026. Oil output fell 57% over the last 12 months. 10,051 bbl in the 12 months through Jul 2026, against 23,156 bbl in the 12 months before.Last 12 monthsbbl per monthmcf per month001,0002,0002,0004,0003,0006,0004,0008,000Jan 24JulJan 25JulJan 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 4.2% of the gas in May 2026.

  • Processing plant (3)
  • Lease fuel (1)
  • Flared (4)
86% of the gas went to a processing plant in the last 12 monthsShare of BARNHART (EF) C-E SA 1 gas by disposition code each month, Aug 2023 to Jul 2026. 86% of the gas went to a processing plant in the last 12 months. Flaring peaked at 4.2% of the gas in May 2026.Share of the lease’s gas by disposition code, per month0%50%100%Flared 4.2%Oct 23Jan 24AprJulOctJan 25AprJulOctJan 26AprJul
86% of the gas went to a processing plant in the last 12 monthsShare of BARNHART (EF) C-E SA 1 gas by disposition code each month, Aug 2023 to Jul 2026. 86% of the gas went to a processing plant in the last 12 months. Flaring peaked at 4.2% of the gas in May 2026.Share of gas by disposition code0%50%100%Flared 4.2%Jan 24JulJan 25JulJan 26Jul

SourceTexas Railroad Commission Production Data Query, through Jul 2026.

  • Processing plant (3)

    86% · 23,061 mcf

  • Lease fuel (1)

    12% · 3,125 mcf

  • Flared (4)

    2.1% · 558 mcf

2.1% of the gas flared in the last 12 months. 5 months above 3%.

1 well on this lease

Wells on BARNHART (EF) C-E SA 1
API numberWell no.Status
42-177-343701HActive

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 gasGathers100Mar 30, 2021Sep 1, 2026
Marathon Oil Ef LLCCasinghead gasBuys100Mar 30, 2021Sep 1, 2026
Enterprise Crude Oil LLCOilGathers20Jul 1, 2022Sep 1, 2026
Phillips 66 CompanyOilGathers10Jan 31, 2022Sep 1, 2026
Reynolds Energy Transport LLCOilGathers10Jul 1, 2022Sep 1, 2026
Sentinel Transportation, LLCOilGathers10Jan 31, 2022Sep 1, 2026

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

Who buys my oilOil price check

7,677.97 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 Barnhart (Ef) C-E Sa 1
API numberWell no.Acreson the permit
42-177-343701H7,677.97

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) C-E SA 1
MonthOil producedbblOil soldbblGas producedmcfGas soldmcf, codes 2+3FlaredmcfWTI$/bblHenry Hub$/MMBtu
Jul 20268848921,5061,26329$80.46$2.89
Jun 20261,1551,1541,9701,64475$84.81$3.15
May 20261,3651,3561,8951,55880$102.13$2.94
Apr 20268638731,4991,25658$100.32$2.77
Mar 20261,3121,3002,1381,75738$91.38$3.04
Feb 20269719811,4901,26141$64.51$3.62
Jan 20261,4151,4122,2611,90071$60.04$7.72
Dec 20251,5761,5532,4272,04555$57.97$4.26
Nov 202500000$60.06$3.79
Oct 202500000$60.89$3.19
Sep 202508000$63.96$2.97
Aug 202551052979167230$64.86$2.91
Jul 20251,8691,8692,9442,65819$68.39$3.20
Jun 20251,6451,6363,2132,89327$68.17$3.02
May 20251,7941,7924,6104,15435$62.17$3.12
Apr 20251,8901,8913,6093,27146$63.54$3.42
Mar 20251,9691,9664,1523,81170$68.24$4.12
Feb 20251,8401,8644,1203,81955$71.53$4.19
Jan 20251,9811,9684,0823,74551$75.74$4.13
Dec 20242,0312,0263,9993,68067$70.12$3.01
Nov 20241,9871,9863,9883,67373$69.95$2.12
Oct 20242,0282,0333,8143,50765$71.99$2.20
Sep 20242,0272,0344,0533,695108$70.24$2.28
Aug 20242,0952,0894,1363,80242$76.68$1.99
Jul 20242,1292,1354,2983,96853$81.80$2.07
Jun 20242,7832,7563,8033,49951$79.77$2.54
May 20244414565585145$80.02$2.12
Apr 20241,9891,9873,3623,12928$85.35$1.60
Mar 20241,8991,8983,9793,72525$81.28$1.49
Feb 20241,9992,0113,2823,08513$77.25$1.72
Jan 20242,2312,2143,6543,42233$74.15$3.18
Dec 20232,3952,3973,9063,67023$71.90$2.52
Nov 20232,5572,5784,4904,24114$77.69$2.71
Oct 20232,7122,6883,3163,12317$85.64$2.98
Sep 20231,0601,0761,9171,80219$89.43$2.64
Aug 20233,0283,0515,4345,07652$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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