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Texas gas well

Producing

DULLYE 01

Dullye 01 is a gas well in Karnes County, Texas, operated by Marathon Oil Ef LLC in the Sugarkane (Eagle Ford) field.

1 well

4,542mcf gas, last 12 months−89% vs prior year
Operator
Marathon Oil Ef LLC
County
Karnes County
Field
Sugarkane (Eagle Ford)
RRC lease
02-280263

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Where it sits

This county

Karnes CountyKarnesAtascosaGoliadWilsonGonzalesDe WittBexarKarnes County
Karnes County
Oil, last 12 months
1,453 bbl
Gas in Jul 2026
186 mcf

Checks stopped on this lease?

  • Sales

    Sales over the last 3 months fell to 19% of the 9 months before.

SourceRailroad Commission production, P-5 and P-4 records, data through Jul 2026.

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Production by month

Gas output fell 89% over the last 12 months

  • Gas (bars)
  • Oil (line)
  • Last 12 months
Gas output fell 89% over the last 12 monthsMonthly gas production and oil for DULLYE 01, Aug 2023 to Jul 2026. Gas output fell 89% over the last 12 months. 4,542 mcf in the 12 months through Jul 2026, against 42,467 mcf in the 12 months before.Last 12 months: 4,542 mcfmcf per monthbbl per month005,0001,00010k2,00015k3,00020k4,00025k5,000Oct 23Jan 24AprJulOctJan 25AprJulOctJan 26AprJul
Gas output fell 89% over the last 12 monthsMonthly gas production and oil for DULLYE 01, Aug 2023 to Jul 2026. Gas output fell 89% over the last 12 months. 4,542 mcf in the 12 months through Jul 2026, against 42,467 mcf in the 12 months before.Last 12 monthsmcf per monthbbl per month005,0001,00010k2,00015k3,00020k4,00025k5,000Jan 24JulJan 25JulJan 26Jul

SourceTexas Railroad Commission Production Data Query, through Jul 2026.

Where the gas went

97% of the gas went to a processing plant in the last 12 months

  • Processing plant (3)
  • Lease fuel (1)
97% of the gas went to a processing plant in the last 12 monthsShare of DULLYE 01 gas by disposition code each month, Aug 2023 to Jul 2026. 97% 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
97% of the gas went to a processing plant in the last 12 monthsShare of DULLYE 01 gas by disposition code each month, Aug 2023 to Jul 2026. 97% 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)

    97% · 14,015 mcf

  • Lease fuel (1)

    2.8% · 406 mcf

Who has run this lease

The operator changed once, most recently in Mar 2023

Operators of this lease over timeEnsign Operating LLC, Jan 2020 to Feb 2023; Marathon Oil Ef LLC, Mar 2023 to Jul 20262020202120222023202420252026Changed Mar 2023Ensign Operating LLCJan 2020 to Feb 2023Marathon Oil Ef LLCMar 2023 to now
Operators of this lease over timeEnsign Operating LLC, Jan 2020 to Feb 2023; Marathon Oil Ef LLC, Mar 2023 to Jul 20262020202120222023202420252026Changed Mar 2023Ensign Operating LLCJan 2020 to Feb 2023Marathon Oil Ef LLCMar 2023 to now

SourceTexas Railroad Commission Production Data Query, through Jul 2026.

1 well on this lease

Wells on DULLYE 01
API numberWell no.Status
42-255-3445404HActive

SourceTexas Railroad Commission Wellbore Query.

Buyers and gatherers

Companies named on the Form P-4, by product
CompanyProductRoleShare%FromUntil
Enterprise Crude Oil LLCCondensateGathers50Mar 1, 2023–
Enterprise Crude Pipeline LLCCondensateGathers50Mar 1, 2023–
Marathon Oil Ef LLCGas-well gasBuys100Mar 1, 2023–
Marathon Oil Ef LLCGas-well gasGathers100Mar 1, 2023–
Gulfmark Energy, Inc.CondensateGathers100Oct 2, 2019Mar 1, 2023
Ensign Operating LLCGas-well gasGathers100Oct 2, 2019Mar 1, 2023
Ensign Operating LLCGas-well gasBuys100Oct 2, 2019Mar 1, 2023
Ensign Operating LLCCondensateGathers50Oct 1, 2019Oct 2, 2019
Enterprise Crude Oil LLCCondensateGathers25Oct 1, 2019Oct 2, 2019
Enterprise Crude Pipeline LLCCondensateGathers25Oct 1, 2019Oct 2, 2019

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

Who buys my oilOil price check

704 acres on the newest permit

Check your decimal on this lease
Permits for Dullye 01
API numberWell no.Acreson the permit
42-255-3445404H704

SourceRailroad Commission drilling permits, Oct 3, 2026 (source 1, source 2).

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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 DULLYE 01
MonthOil producedbblOil soldbblGas producedmcfGas soldmcf, codes 2+3FlaredmcfWTI$/bblHenry Hub$/MMBtu
Jul 2026Marathon Oil2152151861730$80.46$2.89
Jun 2026Marathon Oil13713729260$84.81$3.15
May 2026Marathon Oil22322363590$102.13$2.94
Apr 2026Marathon Oil35235290850$100.32$2.77
Mar 2026Marathon Oil5245244,1743,9480$91.38$3.04
Feb 2026Marathon Oil00000$64.51$3.62
Jan 2026Marathon Oil00000$60.04$7.72
Dec 2025Marathon Oil00000$57.97$4.26
Nov 2025Marathon Oil00000$60.06$3.79
Oct 2025Marathon Oil00000$60.89$3.19
Sep 2025Marathon Oil00000$63.96$2.97
Aug 2025Marathon Oil22000$64.86$2.91
Jul 2025Marathon Oil95952672580$68.39$3.20
Jun 2025Marathon Oil2012015465340$68.17$3.02
May 2025Marathon Oil1551554604500$62.17$3.12
Apr 2025Marathon Oil1841841,2991,2740$63.54$3.42
Mar 2025Marathon Oil4174172,7062,6630$68.24$4.12
Feb 2025Marathon Oil3993992,4262,3930$71.53$4.19
Jan 2025Marathon Oil4274272,1752,1520$75.74$4.13
Dec 2024Marathon Oil6056053,5713,5340$70.12$3.01
Nov 2024Marathon Oil6276274,5694,5280$69.95$2.12
Oct 2024Marathon Oil7777775,4885,3860$71.99$2.20
Sep 2024Marathon Oil1,1321,1327,5667,4270$70.24$2.28
Aug 2024Marathon Oil1,5871,58711,39411,1540$76.68$1.99
Jul 2024Marathon Oil1,6771,67713,98813,9880$81.80$2.07
Jun 2024Marathon Oil1,9801,98015,03614,9870$79.77$2.54
May 2024Marathon Oil3,5203,52023,89823,7940$80.02$2.12
Apr 2024Marathon Oil3,4613,46113,65013,5220$85.35$1.60
Mar 2024Marathon Oil44442552540$81.28$1.49
Feb 2024Marathon Oil4964963,4003,2470$77.25$1.72
Jan 2024Marathon Oil4554553,1363,0110$74.15$3.18
Dec 2023Marathon Oil4734733,2743,1350$71.90$2.52
Nov 2023Marathon Oil5015013,5633,4360$77.69$2.71
Oct 2023Marathon Oil5785783,9783,8420$85.64$2.98
Sep 2023Marathon Oil3513512,9092,8200$89.43$2.64
Aug 2023Marathon Oil3513512,9782,8930$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 (Eagle Ford)CountyKarnes County

Marathon Oil Ef LLC in Karnes County

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Sugarkane (Eagle Ford) field

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