Skip to content
Royalty Clerk

Texas oil lease

Producing

RETZLOFF-MAY UNIT

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

1 well

249bbl oil, last 12 months−78% vs prior year
Operator
Marathon Oil Ef LLC
County
Atascosa County
Field
Eagleville (Eagle Ford-1)
RRC lease
01-15694

Is your check right?

Check my statement

Where it sits

This county

Atascosa CountyAtascosaWilsonMedinaKarnesFrioBexarAtascosa County
Atascosa County
Gas, last 12 months
228 mcf
Oil in Jul 2026
104 bbl

Production by month

Oil output fell 78% over the last 12 months

  • Oil (bars)
  • Gas (line)
  • Last 12 months
Oil output fell 78% over the last 12 monthsMonthly oil production and gas for RETZLOFF-MAY UNIT, Aug 2023 to Jul 2026. Oil output fell 78% over the last 12 months. 249 bbl in the 12 months through Jul 2026, against 1,155 bbl in the 12 months before.Last 12 months: 249 bblbbl per monthmcf per month00100200200400300600400800Oct 23Jan 24AprJulOctJan 25AprJulOctJan 26AprJul
Oil output fell 78% over the last 12 monthsMonthly oil production and gas for RETZLOFF-MAY UNIT, Aug 2023 to Jul 2026. Oil output fell 78% over the last 12 months. 249 bbl in the 12 months through Jul 2026, against 1,155 bbl in the 12 months before.Last 12 monthsbbl per monthmcf per month00100200200400300600400800Jan 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 29.1% 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 RETZLOFF-MAY 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 29.1% of the gas in Aug 2023.Share of the lease’s gas by disposition code, per month0%50%100%Mar 2024: fuel to plantFlared 29.1%Oct 23Jan 24AprJulOctJan 25AprJulOctJan 26AprJul
Since Mar 2024 the lease's gas goes to a processing plant instead of lease fuelShare of RETZLOFF-MAY 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 29.1% of the gas in Aug 2023.Share of gas by disposition code0%50%100%Mar 24: fuel to plantFlared 29.1%Jan 24JulJan 25JulJan 26Jul

SourceTexas Railroad Commission Production Data Query, through Jul 2026.

  • Processing plant (3)

    82% · 463 mcf

  • Lease fuel (1)

    15% · 82 mcf

  • Flared (4)

    3.2% · 18 mcf

3.2% of the gas flared in the last 12 months. 11 months above 3%.

1 well on this lease

Wells on RETZLOFF-MAY UNIT
API numberWell no.Status
42-013-344161HActive

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–
Gulfmark Energy, Inc.OilGathers25Jun 5, 2024–
Harvest Midstream CompanyOilGathers25Jun 5, 2024–
Trafigura Trading LLCOilGathers25Jun 5, 2024–
Marathon Oil Ef LLCCasinghead gasBuys100Jul 1, 2022–
Marathon Oil Ef LLCCasinghead gasGathers100Jul 1, 2022–
Genesis Crude Oil, L.p.OilGathers25Jul 1, 2022Jun 5, 2024
Reynolds Energy Transport LLCOilGathers25Jul 1, 2022Jun 5, 2024
Statewide Crude Inc.OilGathers25Jul 1, 2022Jun 5, 2024
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

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

Who buys my oilOil price check

326.44 acres on the newest permit

  • Good to know

    A pooling certificate (P-12) was filed

    Your tract may share its production with neighbors in a pooled unit. The unit acres the operator uses to divide production can differ from the acreage on one permit.

Check your decimal on this lease
Permits for Retzloff-May Unit
API numberWell no.Acreson the permit
42-013-344161H326.44

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 RETZLOFF-MAY UNIT
MonthOil producedbblOil soldbblGas producedmcfGas soldmcf, codes 2+3FlaredmcfWTI$/bblHenry Hub$/MMBtu
Jul 202610410231270$80.46$2.89
Jun 20260052441$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 20250013110$60.06$3.79
Oct 202500000$60.89$3.19
Sep 2025303117150$63.96$2.97
Aug 2025115114115974$64.86$2.91
Jul 202500000$68.39$3.20
Jun 202502000$68.17$3.02
May 2025126128118956$62.17$3.12
Apr 202521221222181$63.54$3.42
Mar 202519519448392$68.24$4.12
Feb 202513614014110$71.53$4.19
Jan 202535234737291$75.74$4.13
Dec 202413413263541$70.12$3.01
Nov 202400000$69.95$2.12
Oct 202400000$71.99$2.20
Sep 202400000$70.24$2.28
Aug 202400000$76.68$1.99
Jul 202400000$81.80$2.07
Jun 202400000$79.77$2.54
May 2024717000$80.02$2.12
Apr 202433733933232$85.35$1.60
Mar 202436835636271$81.28$1.49
Feb 202402000$77.25$1.72
Jan 20246062329049$74.15$3.18
Dec 2023159163740061$71.90$2.52
Nov 2023316316702053$77.69$2.71
Oct 2023380377664063$85.64$2.98
Sep 2023231232348064$89.43$2.64
Aug 20233843884260124$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.

How to check your stub against this lease Checks stopped on this lease? See the likely reasons

Do your checks match this lease?

Check my statement

Nearby

This lease belongs to

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

Marathon Oil Ef LLC in Atascosa County

All Marathon Oil Ef LLC leases →

Eagleville (Eagle Ford-1) field

All leases in this field →

Leases within 10 km

Drilling permits within 10 km