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HIERHOLZER RETZLOFF UNIT

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

1 well

3bbl oil, last 12 months−100% vs prior year
Operator
Marathon Oil Ef LLC
County
Atascosa County
Field
Eagleville (Eagle Ford-1)
RRC lease
01-15621

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Where it sits

This county

Atascosa CountyAtascosaWilsonMedinaKarnesFrioBexarAtascosa County
Atascosa County
Oil in Jul 2026
0 bbl
Reporting since
Jan 2020

Checks stopped on this lease?

  • Sales

    No sales reported for the last 7 months of state data (through Jul 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 100% over the last 12 months

  • Oil (bars)
  • Gas (line)
  • Last 12 months
Oil output fell 100% over the last 12 monthsMonthly oil production and gas for HIERHOLZER RETZLOFF UNIT, Aug 2023 to Jul 2026. Oil output fell 100% over the last 12 months. 3 bbl in the 12 months through Jul 2026, against 4,742 bbl in the 12 months before.Last 12 months: 3 bblbbl per monthmcf per month005002501,0005001,5007502,0001,0002,5001,250Oct 23Jan 24AprJulOctJan 25AprJulOctJan 26AprJul
Oil output fell 100% over the last 12 monthsMonthly oil production and gas for HIERHOLZER RETZLOFF UNIT, Aug 2023 to Jul 2026. Oil output fell 100% over the last 12 months. 3 bbl in the 12 months through Jul 2026, against 4,742 bbl in the 12 months before.Last 12 monthsbbl per monthmcf per month005002501,0005001,5007502,0001,0002,5001,250Jan 24JulJan 25JulJan 26Jul

SourceTexas Railroad Commission Production Data Query, through Jul 2026.

Where the gas went

Since Mar 2024 the lease's gas goes to a processing plant instead of lease fuel

Flaring peaked at 16.9% of the gas in Aug 2023.

  • Processing plant (3)
  • Lease fuel (1)
  • Flared (4)
Since Mar 2024 the lease's gas goes to a processing plant instead of lease fuelShare of HIERHOLZER RETZLOFF UNIT gas by disposition code each month, Aug 2023 to Jul 2026. Since Mar 2024 the lease's gas goes to a processing plant instead of lease fuel. Flaring peaked at 16.9% of the gas in Aug 2023.Share of the lease’s gas by disposition code, per month0%50%100%Mar 2024: fuel to plantFlared 16.9%Oct 23Jan 24AprJulOctJan 25AprJulOctJan 26AprJul
Since Mar 2024 the lease's gas goes to a processing plant instead of lease fuelShare of HIERHOLZER RETZLOFF UNIT gas by disposition code each month, Aug 2023 to Jul 2026. Since Mar 2024 the lease's gas goes to a processing plant instead of lease fuel. Flaring peaked at 16.9% of the gas in Aug 2023.Share of gas by disposition code0%50%100%Mar 24: fuel to plantFlared 16.9%Jan 24JulJan 25JulJan 26Jul

SourceTexas Railroad Commission Production Data Query, through Jul 2026.

  • Processing plant (3)

    85% · 2,254 mcf

  • Lease fuel (1)

    14% · 371 mcf

  • Flared (4)

    1.4% · 38 mcf

1.4% of the gas flared in the last 12 months. 7 months above 3%.

1 well on this lease

Wells on HIERHOLZER RETZLOFF UNIT
API numberWell no.Status
42-013-343421HActive

SourceTexas Railroad Commission Wellbore Query.

Buyers and gatherers

Companies named on the Form P-4, by product
CompanyProductRoleShare%FromUntil
Enterprise Crude Oil LLCOilGathers25Jul 1, 2022–
Genesis Crude Oil, L.p.OilGathers25Jul 1, 2022–
Reynolds Energy Transport LLCOilGathers25Jul 1, 2022–
Statewide Crude Inc.OilGathers25Jul 1, 2022–
Marathon Oil Ef LLCCasinghead gasBuys100Jul 1, 2022–
Marathon Oil Ef LLCCasinghead gasGathers100Jul 1, 2022–
Enterprise Crude Oil LLCOilGathers20Nov 1, 2011Jul 1, 2022
Genesis Crude Oil, L.p.OilGathers10Nov 1, 2011Jul 1, 2022
Gulfmark Energy, Inc.OilGathers35Nov 1, 2011Jul 1, 2022
Permian Crude Transport, LPOilGathers5Dec 1, 2016Jul 1, 2022
Shell Trading (Us) CompanyOilGathers20Nov 1, 2011Jul 1, 2022
Statewide Crude Inc.OilGathers10Nov 1, 2011Jul 1, 2022

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

Who buys my oilOil price check

320 acres on the newest permit

Check your decimal on this lease
Permits for Hierholzer Retzloff Unit
API numberWell no.Acreson the permit
42-013-343421H320

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 HIERHOLZER RETZLOFF UNIT
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 202533000$57.97$4.26
Nov 202500000$60.06$3.79
Oct 202500000$60.89$3.19
Sep 202500000$63.96$2.97
Aug 202500000$64.86$2.91
Jul 202500000$68.39$3.20
Jun 202500000$68.17$3.02
May 202504000$62.17$3.12
Apr 20251,0101,0071371173$63.54$3.42
Mar 202512612582702$68.24$4.12
Feb 202507000$71.53$4.19
Jan 20254814972982476$75.74$4.13
Dec 20241,7061,6891,1861,0118$70.12$3.01
Nov 20245245214063544$69.95$2.12
Oct 202432532448411$71.99$2.20
Sep 202418318526221$70.24$2.28
Aug 2024387383102891$76.68$1.99
Jul 202400000$81.80$2.07
Jun 202402000$79.77$2.54
May 202433233079673$80.02$2.12
Apr 20244441361$85.35$1.60
Mar 202410102262004$81.28$1.49
Feb 202400000$77.25$1.72
Jan 202400000$74.15$3.18
Dec 2023173204$71.90$2.52
Nov 20233023023571640$77.69$2.71
Oct 2023333336454030$85.64$2.98
Sep 2023342338367037$89.43$2.64
Aug 2023264265391066$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)CountyAtascosa County

Marathon Oil Ef LLC in Atascosa County

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Eagleville (Eagle Ford-1) field

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