Skip to content
Royalty Clerk

Texas oil lease

Producing

MAY UNIT 1

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

8 wells

11,546bbl oil, last 12 months−39% vs prior year
Operator
Marathon Oil Ef LLC
County
Karnes County
Field
Sugarkane (Eagle Ford)
RRC lease
02-10912

Is your check right?

Check my statement

Where it sits

This county

Karnes CountyKarnesAtascosaGoliadWilsonGonzalesDe WittBexarKarnes County
Karnes County
Gas, last 12 months
45,771 mcf
Oil in Jul 2026
328 bbl

Production by month

Oil output fell 39% over the last 12 months

  • Oil (bars)
  • Gas (line)
  • Last 12 months
Oil output fell 39% over the last 12 monthsMonthly oil production and gas for MAY UNIT 1, Aug 2023 to Jul 2026. Oil output fell 39% over the last 12 months. 11,546 bbl in the 12 months through Jul 2026, against 18,903 bbl in the 12 months before.Last 12 months: 11,546 bblbbl per monthmcf per month005002,5001,0005,0001,5007,5002,00010k2,50012.5kOct 23Jan 24AprJulOctJan 25AprJulOctJan 26AprJul
Oil output fell 39% over the last 12 monthsMonthly oil production and gas for MAY UNIT 1, Aug 2023 to Jul 2026. Oil output fell 39% over the last 12 months. 11,546 bbl in the 12 months through Jul 2026, against 18,903 bbl in the 12 months before.Last 12 monthsbbl per monthmcf per month005002,5001,0005,0001,5007,5002,00010k2,50012.5kJan 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 4.7% of the gas in Sep 2025.

  • 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 MAY UNIT 1 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 4.7% of the gas in Sep 2025.Share of the lease’s gas by disposition code, per month0%50%100%Mar 2024: fuel to plantFlared 4.7%Oct 23Jan 24AprJulOctJan 25AprJulOctJan 26AprJul
Since Mar 2024 the lease's gas goes to a processing plant instead of lease fuelShare of MAY UNIT 1 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 4.7% of the gas in Sep 2025.Share of gas by disposition code0%50%100%Mar 24: fuel to plantFlared 4.7%Jan 24JulJan 25JulJan 26Jul

SourceTexas Railroad Commission Production Data Query, through Jul 2026.

  • Processing plant (3)

    72% · 32,777 mcf

  • Lease fuel (1)

    27% · 12,183 mcf

  • Flared (4)

    1.8% · 811 mcf

1.8% of the gas flared in the last 12 months. One month above 3%.

8 wells on this lease

Wells on MAY UNIT 1
API numberWell no.Status
42-255-336473HShut-in
42-255-336485HActive
42-255-336496HActive
42-255-336504HActive
42-255-3429213HActive
42-255-355939HActive
42-255-3562910HActive
42-255-3563111HActive

SourceTexas Railroad Commission Wellbore Query.

Buyers and gatherers

Companies named on the Form P-4, by product
CompanyProductRoleShare%FromUntil
Enterprise Crude Oil LLCOilGathers20Jul 1, 2022–
Harvest Midstream CompanyOilGathers20Jul 1, 2022–
Plains Pipeline L.p.OilGathers20Jul 1, 2022–
Reynolds Energy Transport LLCOilGathers20Jul 1, 2022–
Trafigura Trading LLCOilGathers20Jul 1, 2022–
Marathon Oil Ef LLCCasinghead gasBuys100Aug 25, 2014–
Marathon Oil Ef LLCCasinghead gasGathers100Aug 25, 2014–
Enterprise Crude Oil LLCOilGathers5Sep 1, 2018Jul 1, 2022
Gulfmark Energy, Inc.OilGathers5Sep 1, 2018Jul 1, 2022
Harvest Midstream CompanyOilGathers15Sep 1, 2018Jul 1, 2022
Plains Pipeline L.p.OilGathers70Sep 1, 2018Jul 1, 2022
Trafigura Trading LLCOilGathers5Sep 1, 2018Jul 1, 2022

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

Who buys my oilOil price check

742.24 acres on the newest permit

8 wells are listed on this lease

Permits for May Unit 1
API numberWell no.Acreson the permit
42-255-3563111H742.24
42-255-3562910H742.24
42-255-355939H742.24
42-255-3429213H742.24
42-255-336473H742.24
42-255-336485H742.24
42-255-336496H742.24
42-255-336504H742.24

SourceRailroad Commission drilling permits, Sep 26, 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 MAY UNIT 1
MonthOil producedbblOil soldbblGas producedmcfGas soldmcf, codes 2+3FlaredmcfWTI$/bblHenry Hub$/MMBtu
Jul 20263283146934643$80.46$2.89
Jun 20262312337355153$84.81$3.15
May 20262492515904044$102.13$2.94
Apr 20263183711,4169369$100.32$2.77
Mar 20261,1841,2134,4863,12643$91.38$3.04
Feb 20261,1281,1194,0792,79377$64.51$3.62
Jan 20261,5241,5665,9094,061131$60.04$7.72
Dec 20252,0462,0127,4195,49946$57.97$4.26
Nov 20251,6481,5628,7306,54942$60.06$3.79
Oct 20251953521,4881,12240$60.89$3.19
Sep 20252,4742,3148,2565,932390$63.96$2.97
Aug 20252212161,9701,37623$64.86$2.91
Jul 20251331742,2061,4688$68.39$3.20
Jun 20251,2241,3134,2092,86419$68.17$3.02
May 20251,7161,7055,6403,74929$62.17$3.12
Apr 20252,4052,42811,1667,37543$63.54$3.42
Mar 20252,4382,3685,4473,73118$68.24$4.12
Feb 20251,2661,2822,8691,92934$71.53$4.19
Jan 20251,4871,4718,9766,084152$75.74$4.13
Dec 20241,4751,4826,3824,31122$70.12$3.01
Nov 20241,4751,4755,6303,85629$69.95$2.12
Oct 20241,5521,5556,2584,32334$71.99$2.20
Sep 20241,7291,7356,9614,73917$70.24$2.28
Aug 20242,0032,0257,4075,07625$76.68$1.99
Jul 20242,1062,0727,1335,02340$81.80$2.07
Jun 20241,5841,5605,7044,01020$79.77$2.54
May 20241,3971,4506,6624,66832$80.02$2.12
Apr 20242,2002,1657,4954,89576$85.35$1.60
Mar 20241,5771,5485,7404,07824$81.28$1.49
Feb 20241,0051,0304,5222,18826$77.25$1.72
Jan 20241,2871,2554,3032,65157$74.15$3.18
Dec 20238729165,6583,77117$71.90$2.52
Nov 20232,0282,0087,0315,08443$77.69$2.71
Oct 20231,4921,4856,3584,40118$85.64$2.98
Sep 20231,3651,34912,39710,49817$89.43$2.64
Aug 20231,0631,1153,5661,99232$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

Do your checks match this lease?

Check my statement

Nearby

This lease belongs to

OperatorMarathon Oil Ef LLCFieldSugarkane (Eagle Ford)CountyKarnes County

Marathon Oil Ef LLC in Karnes County

All Marathon Oil Ef LLC leases →

Sugarkane (Eagle Ford) field

All leases in this field →

Leases within 10 km

Drilling permits within 10 km