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Producing

BARNHART (EF)-J.M. PRESTON SA5

Barnhart (Ef)-J.m. Preston Sa5 is an oil lease in Gonzales County, Texas, operated by Marathon Oil Ef LLC in the Eagleville (Eagle Ford-1) field.

1 well

90,754bbl oil, last 12 months−37% vs prior year
Operator
Marathon Oil Ef LLC
County
Gonzales County
Field
Eagleville (Eagle Ford-1)
RRC lease
01-21225

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Where it sits

This county

Gonzales CountyGonzalesWilsonLavacaFayetteCaldwellBastropDe WittHaysGuadalupeGonzales County
Gonzales County
Gas, last 12 months
59,462 mcf
Oil in Jul 2026
6,507 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.

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Production by month

Oil output fell 37% over the last 12 months

  • Oil (bars)
  • Gas (line)
  • Last 12 months
Oil output fell 37% over the last 12 monthsMonthly oil production and gas for BARNHART (EF)-J.M. PRESTON SA5, Oct 2023 to Jul 2026. Oil output fell 37% over the last 12 months. 90,754 bbl in the 12 months through Jul 2026, against 144,138 bbl in the 12 months before.Last 12 months: 90,754 bblbbl per monthmcf per month0010k10k20k20k30k30k40k40k50k50kOct 23Jan 24AprJulOctJan 25AprJulOctJan 26AprJul
Oil output fell 37% over the last 12 monthsMonthly oil production and gas for BARNHART (EF)-J.M. PRESTON SA5, Oct 2023 to Jul 2026. Oil output fell 37% over the last 12 months. 90,754 bbl in the 12 months through Jul 2026, against 144,138 bbl in the 12 months before.Last 12 monthsbbl per monthmcf per month0010k10k20k20k30k30k40k40k50k50kJan 24JulJan 25JulJan 26Jul

SourceTexas Railroad Commission Production Data Query, through Jul 2026.

Where the gas went

84% 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)
84% of the gas went to a processing plant in the last 12 monthsShare of BARNHART (EF)-J.M. PRESTON SA5 gas by disposition code each month, Oct 2023 to Jul 2026. 84% 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
84% of the gas went to a processing plant in the last 12 monthsShare of BARNHART (EF)-J.M. PRESTON SA5 gas by disposition code each month, Oct 2023 to Jul 2026. 84% 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)

    84% · 50,236 mcf

  • Lease fuel (1)

    13% · 7,508 mcf

  • Flared (4)

    2.9% · 1,718 mcf

2.9% of the gas flared in the last 12 months. 5 months above 3%.

1 well on this lease

Wells on BARNHART (EF)-J.M. PRESTON SA5
API numberWell no.Status
42-177-34613121HActive

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 gasGathers100Oct 31, 2023Sep 1, 2026
Marathon Oil Ef LLCCasinghead gasBuys100Oct 31, 2023Sep 1, 2026
Endeavor Crude, LLCOilGathers33Oct 31, 2023Sep 1, 2026
Enterprise Crude Oil LLCOilGathers34Oct 31, 2023Sep 1, 2026
Trafigura Trading LLCOilGathers33Oct 31, 2023Sep 1, 2026

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

Who buys my oilOil price check

7,381.51 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)-J.m. Preston Sa5
API numberWell no.Acreson the permit
42-177-34613121H7,381.51

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

34 months, newest first

Ledger for BARNHART (EF)-J.M. PRESTON SA5
MonthOil producedbblOil soldbblGas producedmcfGas soldmcf, codes 2+3FlaredmcfWTI$/bblHenry Hub$/MMBtu
Jul 20266,5076,5343,7943,18472$80.46$2.89
Jun 20267,1657,1724,3173,602165$84.81$3.15
May 20269,1529,1905,1064,197216$102.13$2.94
Apr 202610,57910,5606,4015,363246$100.32$2.77
Mar 20269,1909,1135,5724,58098$91.38$3.04
Feb 20267,5457,5535,3064,492145$64.51$3.62
Jan 20267,0336,9984,9554,165155$60.04$7.72
Dec 20256,3406,3514,7383,991108$57.97$4.26
Nov 20256,0066,0114,3633,736120$60.06$3.79
Oct 20256,1296,1294,7644,20478$60.89$3.19
Sep 20259,2539,2306,0945,278163$63.96$2.97
Aug 20255,8555,7794,0523,444152$64.86$2.91
Jul 20257779524994513$68.39$3.20
Jun 202511,39511,3357,5906,83563$68.17$3.02
May 202512,40512,3918,1427,33861$62.17$3.12
Apr 202512,94212,9438,6397,830110$63.54$3.42
Mar 202513,17413,1128,8618,132150$68.24$4.12
Feb 20256,5306,5074,3154,00058$71.53$4.19
Jan 20251,4851,6461,06898013$75.74$4.13
Dec 202415,56215,53213,06312,021220$70.12$3.01
Nov 202415,75415,74611,76710,836216$69.95$2.12
Oct 202416,41516,46811,82510,874201$71.99$2.20
Sep 202417,43917,53312,63911,523337$70.24$2.28
Aug 202420,26020,23614,12212,982142$76.68$1.99
Jul 202423,62623,59315,26414,090189$81.80$2.07
Jun 202421,56621,51114,20713,073189$79.77$2.54
May 202419,41419,44912,80911,795114$80.02$2.12
Apr 202422,72022,73415,11314,068124$85.35$1.60
Mar 202426,20026,19218,01316,863114$81.28$1.49
Feb 202428,84729,05518,04716,96973$77.25$1.72
Jan 202434,24334,01321,68720,311196$74.15$3.18
Dec 202342,80442,85624,28722,824141$71.90$2.52
Nov 202349,22948,97925,93725,85285$77.69$2.71
Oct 20235835763002982$85.64$2.98

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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