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Producing

BEST-FENNER UNIT AC

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

1 well

2,821bbl oil, last 12 months−19% vs prior year
Operator
Marathon Oil Ef LLC
County
Karnes County
Field
Sugarkane (Austin Chalk)
RRC lease
02-11191

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Where it sits

This county

Karnes CountyKarnesAtascosaGoliadWilsonGonzalesDe WittBexarKarnes County
Karnes County
Gas, last 12 months
5,219 mcf
Oil in Jul 2026
346 bbl

Production by month

Oil output fell 19% over the last 12 months

  • Oil (bars)
  • Gas (line)
  • Last 12 months
Oil output fell 19% over the last 12 monthsMonthly oil production and gas for BEST-FENNER UNIT AC, Aug 2023 to Jul 2026. Oil output fell 19% over the last 12 months. 2,821 bbl in the 12 months through Jul 2026, against 3,499 bbl in the 12 months before.Last 12 months: 2,821 bblbbl per monthmcf per month002505005001,0007501,5001,0002,000Oct 23Jan 24AprJulOctJan 25AprJulOctJan 26AprJul
Oil output fell 19% over the last 12 monthsMonthly oil production and gas for BEST-FENNER UNIT AC, Aug 2023 to Jul 2026. Oil output fell 19% over the last 12 months. 2,821 bbl in the 12 months through Jul 2026, against 3,499 bbl in the 12 months before.Last 12 monthsbbl per monthmcf per month002505005001,0007501,5001,0002,000Jan 24JulJan 25JulJan 26Jul

SourceTexas Railroad Commission Production Data Query, through Jul 2026.

Where the gas went

90% of the gas went to a processing plant in the last 12 months

  • Processing plant (3)
  • Lease fuel (1)
  • Flared (4)
90% of the gas went to a processing plant in the last 12 monthsShare of BEST-FENNER UNIT AC gas by disposition code each month, Aug 2023 to Jul 2026. 90% 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
90% of the gas went to a processing plant in the last 12 monthsShare of BEST-FENNER UNIT AC gas by disposition code each month, Aug 2023 to Jul 2026. 90% 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)

    90% · 9,100 mcf

  • Lease fuel (1)

    9.6% · 975 mcf

  • Flared (4)

    0.4% · 45 mcf

0.4% of the gas flared in the last 12 months. No month above 3%.

1 well on this lease

Wells on BEST-FENNER UNIT AC
API numberWell no.Status
42-255-344221HActive

SourceTexas Railroad Commission Wellbore Query.

Buyers and gatherers

Companies named on the Form P-4, by product
CompanyProductRoleShare%FromUntil
Enterprise Crude Oil LLCOilGathers50Jun 1, 2020–
Plains Pipeline L.p.OilGathers25Jun 1, 2020–
Reynolds Energy Transport LLCOilGathers25Jul 1, 2022–
Marathon Oil Ef LLCCasinghead gasBuys100Jun 27, 2015–
Marathon Oil Ef LLCCasinghead gasGathers100Jun 27, 2015–
Gulfmark Energy, Inc.OilGathers25Jun 1, 2020Jul 1, 2022
Enterprise Crude Oil LLCOilGathers34Sep 6, 2018Jun 1, 2020
Gulfmark Energy, Inc.OilGathers33Sep 6, 2018Jun 1, 2020
Trafigura Trading LLCOilGathers33Sep 6, 2018Jun 1, 2020

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

Who buys my oilOil price check

432.26 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 Best-Fenner Unit Ac
API numberWell no.Acreson the permit
42-255-344221H432.26

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 BEST-FENNER UNIT AC
MonthOil producedbblOil soldbblGas producedmcfGas soldmcf, codes 2+3FlaredmcfWTI$/bblHenry Hub$/MMBtu
Jul 20263463466085343$80.46$2.89
Jun 20262582606135402$84.81$3.15
May 20264814858827665$102.13$2.94
Apr 20265695611,0669604$100.32$2.77
Mar 202600000$91.38$3.04
Feb 202600000$64.51$3.62
Jan 202600000$60.04$7.72
Dec 202500000$57.97$4.26
Nov 202502000$60.06$3.79
Oct 20252042094103701$60.89$3.19
Sep 20258068001,4071,2826$63.96$2.97
Aug 20251571562332103$64.86$2.91
Jul 202501000$68.39$3.20
Jun 20252022035685154$68.17$3.02
May 20254324321,0139188$62.17$3.12
Apr 20254854851,0169253$63.54$3.42
Mar 20255335341,1771,0623$68.24$4.12
Feb 20255635641,1271,0183$71.53$4.19
Jan 20254804761,2401,1304$75.74$4.13
Dec 202400000$70.12$3.01
Nov 202401000$69.95$2.12
Oct 20241851856415942$71.99$2.20
Sep 20243033051,0801,0032$70.24$2.28
Aug 20243163141,1201,0432$76.68$1.99
Jul 20243283281,0709922$81.80$2.07
Jun 20243343351,1091,0262$79.77$2.54
May 20243553561,1011,0212$80.02$2.12
Apr 20245505471,1921,07411$85.35$1.60
Mar 20247072103950$81.28$1.49
Feb 20242992999449012$77.25$1.72
Jan 20243713719959453$74.15$3.18
Dec 20234794791,0059544$71.90$2.52
Nov 20231961955585293$77.69$2.71
Oct 20233443461,1051,0531$85.64$2.98
Sep 20233463441,2021,1441$89.43$2.64
Aug 20233693701,2391,1761$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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Nearby

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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