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MEDINA-JONAS UNIT A & B (SA)

Medina-Jonas Unit A & B (Sa) is an oil lease in Karnes County, Texas, operated by Marathon Oil Ef LLC in the Eagleville (Eagle Ford-2) field.

1 well

13,622bbl oil, last 12 months+6% vs prior year
Operator
Marathon Oil Ef LLC
County
Karnes County
Field
Eagleville (Eagle Ford-2)
RRC lease
02-10914

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Where it sits

This county

Karnes CountyKarnesAtascosaGoliadWilsonGonzalesDe WittBexarKarnes County
Karnes County
Gas, last 12 months
16,418 mcf
Oil in Jul 2026
1,154 bbl

Production by month

Oil output rose 6% over the last 12 months

  • Oil (bars)
  • Gas (line)
  • Last 12 months
Oil output rose 6% over the last 12 monthsMonthly oil production and gas for MEDINA-JONAS UNIT A & B (SA), Aug 2023 to Jul 2026. Oil output rose 6% over the last 12 months. 13,622 bbl in the 12 months through Jul 2026, against 12,870 bbl in the 12 months before.Last 12 months: 13,622 bblbbl per monthmcf per month005001,0001,0002,0001,5003,0002,0004,0002,5005,000Oct 23Jan 24AprJulOctJan 25AprJulOctJan 26AprJul
Oil output rose 6% over the last 12 monthsMonthly oil production and gas for MEDINA-JONAS UNIT A & B (SA), Aug 2023 to Jul 2026. Oil output rose 6% over the last 12 months. 13,622 bbl in the 12 months through Jul 2026, against 12,870 bbl in the 12 months before.Last 12 monthsbbl per monthmcf per month005001,0001,0002,0001,5003,0002,0004,0002,5005,000Jan 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 16.8% of the gas in Feb 2024.

  • 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 MEDINA-JONAS UNIT A & B (SA) 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 16.8% of the gas in Feb 2024.Share of the lease’s gas by disposition code, per month0%50%100%Mar 2024: fuel to plantFlared 16.8%Oct 23Jan 24AprJulOctJan 25AprJulOctJan 26AprJul
Since Mar 2024 the lease's gas goes to a processing plant instead of lease fuelShare of MEDINA-JONAS UNIT A & B (SA) 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 16.8% of the gas in Feb 2024.Share of gas by disposition code0%50%100%Mar 24: fuel to plantFlared 16.8%Jan 24JulJan 25JulJan 26Jul

SourceTexas Railroad Commission Production Data Query, through Jul 2026.

  • Processing plant (3)

    81% · 13,341 mcf

  • Lease fuel (1)

    18% · 2,940 mcf

  • Flared (4)

    0.8% · 137 mcf

0.8% of the gas flared in the last 12 months. 11 months above 3%.

1 well on this lease

Wells on MEDINA-JONAS UNIT A & B (SA)
API numberWell no.Status
42-255-337191HActive

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–
Harvest Midstream CompanyOilGathers25Jul 1, 2022–
Reynolds Energy Transport LLCOilGathers25Jul 1, 2022–
Trafigura Trading LLCOilGathers25Jul 1, 2022–
Marathon Oil Ef LLCCasinghead gasBuys100Jul 20, 2014–
Marathon Oil Ef LLCCasinghead gasGathers100Jul 20, 2014–
Enterprise Crude Oil LLCOilGathers1Sep 1, 2018Jul 1, 2022
Gulfmark Energy, Inc.OilGathers1Sep 1, 2018Jul 1, 2022
Harvest Midstream CompanyOilGathers97Sep 1, 2018Jul 1, 2022
Trafigura Trading LLCOilGathers1Sep 1, 2018Jul 1, 2022

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

Who buys my oilOil price check

382.16 acres on the newest permit

  • 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 Medina-Jonas Unit A & B (Sa)
API numberWell no.Acreson the permit
42-255-337191H382.16

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 MEDINA-JONAS UNIT A & B (SA)
MonthOil producedbblOil soldbblGas producedmcfGas soldmcf, codes 2+3FlaredmcfWTI$/bblHenry Hub$/MMBtu
Jul 20261,1541,1511,2681,0235$80.46$2.89
Jun 20261,1051,1054,1493,36723$84.81$3.15
May 20261,1951,2043,7262,98070$102.13$2.94
Apr 20261,0069921631274$100.32$2.77
Mar 2026720721108851$91.38$3.04
Feb 20261,0641,0651631312$64.51$3.62
Jan 20261,1101,1071801442$60.04$7.72
Dec 20257127152982393$57.97$4.26
Nov 20251,6341,6291,1249204$60.06$3.79
Oct 20251,1071,1151,7911,49211$60.89$3.19
Sep 20251,4591,4602,7692,2888$63.96$2.97
Aug 20251,3561,3506795454$64.86$2.91
Jul 20251,0321,0302111661$68.39$3.20
Jun 20251,0741,0732421941$68.17$3.02
May 20251,0241,0241991610$62.17$3.12
Apr 20251,2331,2292652151$63.54$3.42
Mar 202540441686710$68.24$4.12
Feb 20251,4761,4634553772$71.53$4.19
Jan 20252632702432001$75.74$4.13
Dec 20241,4041,4021,1269213$70.12$3.01
Nov 20241,3801,3801,1609683$69.95$2.12
Oct 20241,3421,3429778173$71.99$2.20
Sep 20241,0261,0287065961$70.24$2.28
Aug 20241,2121,2271,3181,0984$76.68$1.99
Jul 20242,2832,2692,4201,759106$81.80$2.07
Jun 202490389696971668$79.77$2.54
May 202418017866524$80.02$2.12
Apr 20242727540$85.35$1.60
Mar 202421338302$81.28$1.49
Feb 2024789794796265134$77.25$1.72
Jan 20241,2161,2151,389733228$74.15$3.18
Dec 20231,1481,1451,071420109$71.90$2.52
Nov 20231,1631,1601,184576149$77.69$2.71
Oct 20231,0181,020968310111$85.64$2.98
Sep 20231,1141,1171,450779146$89.43$2.64
Aug 20231,2341,2391,8501,144125$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-2)CountyKarnes County

Marathon Oil Ef LLC in Karnes County

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