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Texas oil lease

Producing

CHALLENGER UNIT A

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

11 wells

29,051bbl oil, last 12 months−46% vs prior year
Operator
Marathon Oil Ef LLC
County
Karnes County
Field
Eagleville (Eagle Ford-2)
RRC lease
02-10519

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Where it sits

This county

Karnes CountyKarnesAtascosaGoliadWilsonGonzalesDe WittBexarKarnes County
Karnes County
Gas, last 12 months
36,508 mcf
Oil in Jul 2026
2,231 bbl

Production by month

Oil output fell 46% over the last 12 months

  • Oil (bars)
  • Gas (line)
  • Last 12 months
Oil output fell 46% over the last 12 monthsMonthly oil production and gas for CHALLENGER UNIT A, Aug 2023 to Jul 2026. Oil output fell 46% over the last 12 months. 29,051 bbl in the 12 months through Jul 2026, against 53,934 bbl in the 12 months before.Last 12 months: 29,051 bblbbl per monthmcf per month002,0002,5004,0005,0006,0007,5008,00010kOct 23Jan 24AprJulOctJan 25AprJulOctJan 26AprJul
Oil output fell 46% over the last 12 monthsMonthly oil production and gas for CHALLENGER UNIT A, Aug 2023 to Jul 2026. Oil output fell 46% over the last 12 months. 29,051 bbl in the 12 months through Jul 2026, against 53,934 bbl in the 12 months before.Last 12 monthsbbl per monthmcf per month002,0002,5004,0005,0006,0007,5008,00010kJan 24JulJan 25JulJan 26Jul

SourceTexas Railroad Commission Production Data Query, through Jul 2026.

Where the gas went

77% of the gas went to a processing plant in the last 12 months

  • Processing plant (3)
  • Lease fuel (1)
  • Flared (4)
77% of the gas went to a processing plant in the last 12 monthsShare of CHALLENGER UNIT A gas by disposition code each month, Aug 2023 to Jul 2026. 77% 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
77% of the gas went to a processing plant in the last 12 monthsShare of CHALLENGER UNIT A gas by disposition code each month, Aug 2023 to Jul 2026. 77% 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)

    77% · 27,932 mcf

  • Lease fuel (1)

    22% · 8,180 mcf

  • Flared (4)

    1.1% · 396 mcf

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

11 wells on this lease

Wells on CHALLENGER UNIT A
API numberWell no.Status
42-255-329641HActive
42-255-329652HActive
42-255-334183HActive
42-255-334194HActive
42-255-334205HActive
42-255-334216HActive
42-255-336637HActive
42-255-336648HShut-in
42-255-336659HActive
42-255-3366610HActive
42-255-3366711HActive

SourceTexas Railroad Commission Wellbore Query.

Buyers and gatherers

Companies named on the Form P-4, by product
CompanyProductRoleShare%From
Shell Trading (Us) CompanyOilGathers90May 3, 2013
Statewide Crude Inc.OilGathers10May 3, 2013
Marathon Oil Ef LLCCasinghead gasBuys100May 3, 2013
Marathon Oil Ef LLCCasinghead gasGathers100May 3, 2013

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

Who buys my oilOil price check

499.85 acres on the newest permit

11 wells are listed on this lease

Permits for Challenger Unit A
API numberWell no.Acreson the permit
42-255-3366711H499.85
42-255-336637H499.85
42-255-336648H499.85
42-255-336659H499.85
42-255-3366610H499.85
42-255-334183H499.85
42-255-334194H499.85
42-255-334205H499.85
42-255-334216H499.85
42-255-329652H495.91
42-255-329641H495.91

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 A
MonthOil producedbblOil soldbblGas producedmcfGas soldmcf, codes 2+3FlaredmcfWTI$/bblHenry Hub$/MMBtu
Jul 20262,2312,2343,0622,27432$80.46$2.89
Jun 20262,8442,8112,9982,22625$84.81$3.15
May 20261,3171,3351,24793420$102.13$2.94
Apr 20261,8761,9022,1741,67330$100.32$2.77
Mar 20263,2443,2033,6442,76627$91.38$3.04
Feb 20261,2661,2551,25893210$64.51$3.62
Jan 20261,2011,2681,3641,03712$60.04$7.72
Dec 20253,1953,1673,8833,03325$57.97$4.26
Nov 20252,4352,4363,2752,60519$60.06$3.79
Oct 20253,4243,4235,0274,01636$60.89$3.19
Sep 20252,9032,9044,4243,48091$63.96$2.97
Aug 20253,1153,1004,1522,95669$64.86$2.91
Jul 20252,9622,9804,5493,10983$68.39$3.20
Jun 20253,7093,7226,1594,90635$68.17$3.02
May 20254,2604,2507,0085,69034$62.17$3.12
Apr 20254,0564,0737,2145,86857$63.54$3.42
Mar 20254,9574,9527,5306,16238$68.24$4.12
Feb 20254,3274,3146,7075,305118$71.53$4.19
Jan 20254,9084,9007,9316,37096$75.74$4.13
Dec 20244,9614,9557,6886,26119$70.12$3.01
Nov 20244,5064,5367,2465,74238$69.95$2.12
Oct 20245,3685,3336,8615,46361$71.99$2.20
Sep 20244,8084,8216,1875,06037$70.24$2.28
Aug 20245,1125,1266,7625,54652$76.68$1.99
Jul 20245,8355,8158,5026,88139$81.80$2.07
Jun 20245,3145,3187,6206,027128$79.77$2.54
May 20244,8654,9177,5095,821146$80.02$2.12
Apr 20245,6155,6488,0156,46167$85.35$1.60
Mar 20247,1197,0798,7987,31996$81.28$1.49
Feb 20245,8955,9207,5587,15915$77.25$1.72
Jan 20246,9286,8908,9768,42112$74.15$3.18
Dec 20236,6616,6678,8428,21819$71.90$2.52
Nov 20236,5766,5437,8667,34220$77.69$2.71
Oct 20236,0886,1167,9447,46725$85.64$2.98
Sep 20236,0296,0257,9647,43526$89.43$2.64
Aug 20236,6206,6288,3187,70228$81.39$2.58

SourceTexas Railroad Commission Production Data Query, through Jul 2026. Prices: EIA, through Aug 2026. Updated Sep 28, 2026.

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This lease belongs to

OperatorMarathon Oil Ef LLCFieldEagleville (Eagle Ford-2)CountyKarnes County

Marathon Oil Ef LLC in Karnes County

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