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Texas oil lease

Producing

R. MAY B

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

28 wells

74,472bbl oil, last 12 months−45% vs prior year
Operator
Marathon Oil Ef LLC
County
Atascosa County
Field
Eagleville (Eagle Ford-1)
RRC lease
01-16361

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Where it sits

This county

Atascosa CountyAtascosaWilsonMedinaKarnesFrioBexarAtascosa County
Atascosa County
Gas, last 12 months
58,514 mcf
Oil in Jul 2026
3,378 bbl

Production by month

Oil output fell 45% over the last 12 months

  • Oil (bars)
  • Gas (line)
  • Last 12 months
Oil output fell 45% over the last 12 monthsMonthly oil production and gas for R. MAY B, Aug 2023 to Jul 2026. Oil output fell 45% over the last 12 months. 74,472 bbl in the 12 months through Jul 2026, against 134,412 bbl in the 12 months before.Last 12 months: 74,472 bblbbl per monthmcf per month005,0005,00010k10k15k15k20k20kOct 23Jan 24AprJulOctJan 25AprJulOctJan 26AprJul
Oil output fell 45% over the last 12 monthsMonthly oil production and gas for R. MAY B, Aug 2023 to Jul 2026. Oil output fell 45% over the last 12 months. 74,472 bbl in the 12 months through Jul 2026, against 134,412 bbl in the 12 months before.Last 12 monthsbbl per monthmcf per month005,0005,00010k10k15k15k20k20kJan 24JulJan 25JulJan 26Jul

SourceTexas Railroad Commission Production Data Query, through Jul 2026.

Where the gas went

Since Dec 2023 the lease's gas goes to a processing plant instead of lease fuel

Flaring peaked at 9.0% of the gas in Aug 2023.

  • Processing plant (3)
  • Lease fuel (1)
  • Flared (4)
Since Dec 2023 the lease's gas goes to a processing plant instead of lease fuelShare of R. MAY B gas by disposition code each month, Aug 2023 to Jul 2026. Since Dec 2023 the lease's gas goes to a processing plant instead of lease fuel. Flaring peaked at 9.0% of the gas in Aug 2023.Share of the lease’s gas by disposition code, per month0%50%100%Dec 2023: fuel to plantFlared 9.0%Oct 23Jan 24AprJulOctJan 25AprJulOctJan 26AprJul
Since Dec 2023 the lease's gas goes to a processing plant instead of lease fuelShare of R. MAY B gas by disposition code each month, Aug 2023 to Jul 2026. Since Dec 2023 the lease's gas goes to a processing plant instead of lease fuel. Flaring peaked at 9.0% of the gas in Aug 2023.Share of gas by disposition code0%50%100%Dec 23: fuel to plantFlared 9.0%Jan 24JulJan 25JulJan 26Jul

SourceTexas Railroad Commission Production Data Query, through Jul 2026.

  • Processing plant (3)

    74% · 43,401 mcf

  • Lease fuel (1)

    24% · 13,916 mcf

  • Flared (4)

    2.0% · 1,197 mcf

2.0% of the gas flared in the last 12 months. 19 months above 3%.

28 wells on this lease

Wells on R. MAY B
API numberWell no.Status
42-013-345431HActive
42-013-345442HActive
42-013-345453HActive
42-013-345544HActive
42-013-345555HActive
42-013-346836HActive
42-013-346847HActive
42-013-346859HShut-in
42-013-3468610HActive
42-013-3468711HActive
42-013-346898HActive
42-013-3485324HShut-in
42-013-3485425HActive
42-013-3485523HActive
42-013-3486016HActive
42-013-3486117HActive
42-013-3486218HActive
42-013-3490912HShut-in
42-013-3491013HActive
42-013-3491114HActive
42-013-3491215HActive
42-013-3514533HActive
42-013-3514632HActive
42-013-3519826HShut-in
42-013-3519927HActive
42-013-3540819HActive
42-013-3540920HActive
42-013-3541021HActive

SourceTexas Railroad Commission Wellbore Query.

Buyers and gatherers

Companies named on the Form P-4, by product
CompanyProductRoleShare%From
Statewide Crude Inc.OilGathers100Nov 3, 2012
Marathon Oil Ef LLCCasinghead gasBuys100Nov 3, 2012
Marathon Oil Ef LLCCasinghead gasGathers100Nov 3, 2012

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

Who buys my oilOil price check

1,469.71 acres on the newest permit

  • Good to know

    The wells on this lease state different acreage

    The permits state between 1,469.71 and 1,501.7 acres. Use the acres from your own division order for the well you are paid on.

  • Good to know

    28 wells are listed on this lease

    Each well can have its own unit. The decimal for one well does not have to equal the decimal for another.

  • 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 R. May B
API numberWell no.Acreson the permit
42-013-3540819H1,469.71
42-013-3540920H1,469.71
42-013-3541021H1,469.71
42-013-3519826H1,469.71
42-013-3519927H1,469.71
42-013-3514533H1,469.71
42-013-3514632H1,469.71
42-013-3491114H1,469.71
42-013-3491215H1,469.71
42-013-345431H1,469.71
42-013-3490912H1,469.71
42-013-3491013H1,469.71

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 R. MAY B
MonthOil producedbblOil soldbblGas producedmcfGas soldmcf, codes 2+3FlaredmcfWTI$/bblHenry Hub$/MMBtu
Jul 20263,3783,4203,0622,25139$80.46$2.89
Jun 20268,4898,4588,5445,974133$84.81$3.15
May 20266,2256,3066,3974,758126$102.13$2.94
Apr 20264,5154,4863,7302,72192$100.32$2.77
Mar 20268,6538,6813,8272,93860$91.38$3.04
Feb 20264,2864,2191,5241,15532$64.51$3.62
Jan 20264,9944,9692,0901,66234$60.04$7.72
Dec 20256,2506,2543,5192,84475$57.97$4.26
Nov 20256,3176,4034,6373,425112$60.06$3.79
Oct 20258,0918,0178,3365,929264$60.89$3.19
Sep 20256,2446,2274,6963,47991$63.96$2.97
Aug 20257,0307,1098,1526,265139$64.86$2.91
Jul 20259,5889,46616,34712,164415$68.39$3.20
Jun 20259,80210,0049,6026,621578$68.17$3.02
May 202512,18212,25815,4618,249451$62.17$3.12
Apr 202513,17913,17212,8757,881710$63.54$3.42
Mar 202512,13612,03111,1035,908959$68.24$4.12
Feb 202513,23313,17812,4296,807638$71.53$4.19
Jan 202513,21313,20410,4895,792574$75.74$4.13
Dec 202410,68110,5859,5455,755237$70.12$3.01
Nov 20248,5518,55010,1166,150322$69.95$2.12
Oct 202410,61610,61911,7567,395674$71.99$2.20
Sep 20249,0899,16912,0078,434379$70.24$2.28
Aug 202412,14212,10013,7328,138775$76.68$1.99
Jul 202410,43910,4709,9746,906506$81.80$2.07
Jun 202412,75812,78514,17510,093589$79.77$2.54
May 202411,81411,87814,9969,670580$80.02$2.12
Apr 202410,53510,61114,8559,661434$85.35$1.60
Mar 202412,24612,15313,6188,718421$81.28$1.49
Feb 202411,03510,98114,6409,559382$77.25$1.72
Jan 202413,07113,17417,76311,311799$74.15$3.18
Dec 202313,07613,04613,9258,430369$71.90$2.52
Nov 202311,56111,50411,6425,135755$77.69$2.71
Oct 202312,11212,14913,6046,247432$85.64$2.98
Sep 202310,42410,46613,0725,824983$89.43$2.64
Aug 202311,26411,21015,1206,5101,359$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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