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Producing

CHALLENGER UNIT B AC

Challenger Unit B Ac is an oil lease in Karnes County, Texas, operated by Marathon Oil Ef LLC in the Sugarkane (Austin Chalk) field.

2 wells

18,465bbl oil, last 12 months−28% vs prior year
Operator
Marathon Oil Ef LLC
County
Karnes County
Field
Sugarkane (Austin Chalk)
RRC lease
02-11630

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Where it sits

This county

Karnes CountyKarnesAtascosaGoliadWilsonGonzalesDe WittBexarKarnes County
Karnes County
Gas, last 12 months
80,843 mcf
Oil in Jul 2026
1,686 bbl

Production by month

Oil output fell 28% over the last 12 months

  • Oil (bars)
  • Gas (line)
  • Last 12 months
Oil output fell 28% over the last 12 monthsMonthly oil production and gas for CHALLENGER UNIT B AC, Aug 2023 to Jul 2026. Oil output fell 28% over the last 12 months. 18,465 bbl in the 12 months through Jul 2026, against 25,739 bbl in the 12 months before.Last 12 months: 18,465 bblbbl per monthmcf per month001,0005,0002,00010k3,00015k4,00020kOct 23Jan 24AprJulOctJan 25AprJulOctJan 26AprJul
Oil output fell 28% over the last 12 monthsMonthly oil production and gas for CHALLENGER UNIT B AC, Aug 2023 to Jul 2026. Oil output fell 28% over the last 12 months. 18,465 bbl in the 12 months through Jul 2026, against 25,739 bbl in the 12 months before.Last 12 monthsbbl per monthmcf per month001,0005,0002,00010k3,00015k4,00020kJan 24JulJan 25JulJan 26Jul

SourceTexas Railroad Commission Production Data Query, through Jul 2026.

Where the gas went

76% of the gas went to a processing plant in the last 12 months

  • Processing plant (3)
  • Lease fuel (1)
  • Flared (4)
76% of the gas went to a processing plant in the last 12 monthsShare of CHALLENGER UNIT B AC gas by disposition code each month, Aug 2023 to Jul 2026. 76% of the gas went to a processing plant in the last 12 months.Share of the lease’s gas by disposition code, per month0%50%100%Oct 23Jan 24AprJulOctJan 25AprJulOctJan 26AprJul
76% of the gas went to a processing plant in the last 12 monthsShare of CHALLENGER UNIT B AC gas by disposition code each month, Aug 2023 to Jul 2026. 76% of the gas went to a processing plant in the last 12 months.Share of gas by disposition code0%50%100%Jan 24JulJan 25JulJan 26Jul

SourceTexas Railroad Commission Production Data Query, through Jul 2026.

  • Processing plant (3)

    76% · 61,536 mcf

  • Lease fuel (1)

    23% · 18,388 mcf

  • Flared (4)

    1.1% · 919 mcf

1.1% of the gas flared in the last 12 months. No month above 3%.

2 wells on this lease

Wells on CHALLENGER UNIT B AC
API numberWell no.Status
42-255-358621HActive
42-255-358632HActive

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 gasBuys100Nov 2, 2018–
Marathon Oil Ef LLCCasinghead gasGathers100Nov 2, 2018–
Enterprise Crude Oil LLCOilGathers1Nov 2, 2018Jul 1, 2022
Gulfmark Energy, Inc.OilGathers1Nov 2, 2018Jul 1, 2022
Harvest Midstream CompanyOilGathers97Nov 2, 2018Jul 1, 2022
Trafigura Trading LLCOilGathers1Nov 2, 2018Jul 1, 2022

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

Who buys my oilOil price check

444.75 acres on the newest permit

Check your decimal on this lease
Permits for Challenger Unit B Ac
API numberWell no.Acreson the permit
42-255-358621H444.75
42-255-358632H444.75

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 CHALLENGER UNIT B AC
MonthOil producedbblOil soldbblGas producedmcfGas soldmcf, codes 2+3FlaredmcfWTI$/bblHenry Hub$/MMBtu
Jul 20261,6861,6965,6964,22960$80.46$2.89
Jun 20262,3812,3699,1396,78775$84.81$3.15
May 20261,7041,7297,1565,358116$102.13$2.94
Apr 20262,4582,43511,2078,623154$100.32$2.77
Mar 20262,0091,9808,8156,69165$91.38$3.04
Feb 20266846823,3602,49125$64.51$3.62
Jan 20267978093,7582,85832$60.04$7.72
Dec 20251,0521,0484,1123,21227$57.97$4.26
Nov 20251,0041,0054,9743,95630$60.06$3.79
Oct 20251,4231,4237,6616,11956$60.89$3.19
Sep 20251,2131,2307,4715,877154$63.96$2.97
Aug 20252,0542,0457,4945,335125$64.86$2.91
Jul 20251,9881,9878,8576,054161$68.39$3.20
Jun 20251,8231,8348,7546,97250$68.17$3.02
May 20252,3362,3238,9637,27744$62.17$3.12
Apr 20251,8431,8508,0716,56564$63.54$3.42
Mar 20252,1882,1849,6977,93550$68.24$4.12
Feb 20251,8381,8384,8423,83085$71.53$4.19
Jan 20252,4042,4028,7497,027106$75.74$4.13
Dec 20242,5822,5749,9618,11324$70.12$3.01
Nov 20241,9551,9658,5536,77745$69.95$2.12
Oct 20242,1542,1438,7826,99279$71.99$2.20
Sep 20242,2072,2148,9607,32754$70.24$2.28
Aug 20242,4212,4259,9628,17177$76.68$1.99
Jul 20242,5942,58410,5198,51448$81.80$2.07
Jun 20242,2592,2749,4587,481159$79.77$2.54
May 20243,0243,0408,2116,365160$80.02$2.12
Apr 20242,7592,7569,7607,86782$85.35$1.60
Mar 20242,5892,58510,3358,597113$81.28$1.49
Feb 20242,6842,68710,0148,21766$77.25$1.72
Jan 20242,7192,70610,7618,30452$74.15$3.18
Dec 20232,7592,77111,3988,67881$71.90$2.52
Nov 20233,3073,28612,1359,425103$77.69$2.71
Oct 20232,6732,68512,61310,026135$85.64$2.98
Sep 20232,6362,63611,1628,595125$89.43$2.64
Aug 20233,0083,01712,1419,081137$81.39$2.58

SourceTexas Railroad Commission Production Data Query, through Jul 2026. Prices: EIA, through Aug 2026. Updated Oct 2, 2026.

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This lease belongs to

OperatorMarathon Oil Ef LLCFieldSugarkane (Austin Chalk)CountyKarnes County

Marathon Oil Ef LLC in Karnes County

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Sugarkane (Austin Chalk) field

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