Skip to content
Royalty Clerk

Texas oil lease

Producing

CHALLENGER UNIT B-A AC SA

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

1 well

14,708bbl oil, last 12 months−41% vs prior year
Operator
Marathon Oil Ef LLC
County
Karnes County
Field
Sugarkane (Austin Chalk)
RRC lease
02-12180

Is your check right?

Check my statement

Where it sits

This county

Karnes CountyKarnesAtascosaGoliadWilsonGonzalesDe WittBexarKarnes County
Karnes County
Gas, last 12 months
68,211 mcf
Oil in Jul 2026
1,447 bbl

Production by month

Oil output fell 41% over the last 12 months

  • Oil (bars)
  • Gas (line)
  • Last 12 months
Oil output fell 41% over the last 12 monthsMonthly oil production and gas for CHALLENGER UNIT B-A AC SA, Aug 2023 to Jul 2026. Oil output fell 41% over the last 12 months. 14,708 bbl in the 12 months through Jul 2026, against 24,990 bbl in the 12 months before.Last 12 months: 14,708 bblbbl per monthmcf per month001,0005,0002,00010k3,00015k4,00020kOct 23Jan 24AprJulOctJan 25AprJulOctJan 26AprJul
Oil output fell 41% over the last 12 monthsMonthly oil production and gas for CHALLENGER UNIT B-A AC SA, Aug 2023 to Jul 2026. Oil output fell 41% over the last 12 months. 14,708 bbl in the 12 months through Jul 2026, against 24,990 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-A AC SA 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-A AC SA 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% · 52,146 mcf

  • Lease fuel (1)

    22% · 15,292 mcf

  • Flared (4)

    1.1% · 773 mcf

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

1 well on this lease

Wells on CHALLENGER UNIT B-A AC SA
API numberWell no.Status
42-255-371601HActive

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 gasBuys100Jun 10, 2021–
Marathon Oil Ef LLCCasinghead gasGathers100Jun 10, 2021–
Enterprise Crude Oil LLCOilGathers1Jun 10, 2021Jul 1, 2022
Gulfmark Energy, Inc.OilGathers1Jun 10, 2021Jul 1, 2022
Harvest Midstream CompanyOilGathers97Jun 10, 2021Jul 1, 2022
Trafigura Trading LLCOilGathers1Jun 10, 2021Jul 1, 2022

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

Who buys my oilOil price check

943.49 acres on the newest permit

  • Worth asking

    An allocation well is on this lease

    A well drilled across several tracts shares its production by an allocation formula, so the decimal is not always your acres over the unit acres. Ask the operator for the allocation formula and the tract factor for your land.

  • 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 Challenger Unit B-A Ac Sa
API numberWell no.Acreson the permit
42-255-371601H943.49

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 CHALLENGER UNIT B-A AC SA
MonthOil producedbblOil soldbblGas producedmcfGas soldmcf, codes 2+3FlaredmcfWTI$/bblHenry Hub$/MMBtu
Jul 20261,4471,4355,4034,01257$80.46$2.89
Jun 20261,2311,2066,3994,75253$84.81$3.15
May 20262302234,9783,72781$102.13$2.94
Apr 2026667,1115,47198$100.32$2.77
Mar 20265331821381$91.38$3.04
Feb 20268668722,6511,96520$64.51$3.62
Jan 20261,3411,3626,3374,82054$60.04$7.72
Dec 20251,8081,8085,5934,36936$57.97$4.26
Nov 20251,9521,9367,3685,86044$60.06$3.79
Oct 20251,9311,9377,6476,10856$60.89$3.19
Sep 20251,8901,8907,6486,016158$63.96$2.97
Aug 20252,0011,9946,8944,908115$64.86$2.91
Jul 20252,0332,0407,2144,931131$68.39$3.20
Jun 20252,3062,3007,5325,99943$68.17$3.02
May 20251,9501,9466,0384,90230$62.17$3.12
Apr 20251,8631,8657,1825,84257$63.54$3.42
Mar 20251,9831,9787,7216,31939$68.24$4.12
Feb 20251,5911,5816,1214,842107$71.53$4.19
Jan 20251,4181,4255,7994,65870$75.74$4.13
Dec 20242,1272,1288,4696,89721$70.12$3.01
Nov 20242,2172,2298,3616,62544$69.95$2.12
Oct 20242,4782,4648,7506,96778$71.99$2.20
Sep 20242,4282,4358,3856,85751$70.24$2.28
Aug 20242,5962,5999,1297,48870$76.68$1.99
Jul 20242,6422,6339,3717,58543$81.80$2.07
Jun 20242,4882,4889,0817,182153$79.77$2.54
May 20242,1132,1468,9716,954175$80.02$2.12
Apr 20242,9402,9489,4687,63279$85.35$1.60
Mar 20243,2733,25910,5518,777115$81.28$1.49
Feb 20242,9652,96810,0708,94042$77.25$1.72
Jan 20242,9752,96311,95810,43532$74.15$3.18
Dec 20233,1543,16012,65510,81555$71.90$2.52
Nov 20233,3473,33812,61110,94363$77.69$2.71
Oct 20233,6893,70613,22111,70979$85.64$2.98
Sep 20233,6673,66013,76012,36468$89.43$2.64
Aug 20233,7243,73113,35911,88666$81.39$2.58

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 LLCFieldSugarkane (Austin Chalk)CountyKarnes County

Marathon Oil Ef LLC in Karnes County

All Marathon Oil Ef LLC leases →

Sugarkane (Austin Chalk) field

All leases in this field →

Leases within 10 km

Drilling permits within 10 km