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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

8,735mcf gas, last 12 months−54% vs prior year
Operator
Marathon Oil Ef LLC
County
Karnes County
Field
Sugarkane (Eagle Ford)
RRC lease
02-280264

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Where it sits

This county

Karnes CountyKarnesAtascosaGoliadWilsonGonzalesDe WittBexarKarnes County
Karnes County
Oil, last 12 months
1,658 bbl
Gas in Jul 2026
911 mcf

Production by month

Gas output fell 54% over the last 12 months

  • Gas (bars)
  • Oil (line)
  • Last 12 months
Gas output fell 54% over the last 12 monthsMonthly gas production and oil for DULLYE 01, Aug 2023 to Jul 2026. Gas output fell 54% over the last 12 months. 8,735 mcf in the 12 months through Jul 2026, against 18,899 mcf in the 12 months before.Last 12 months: 8,735 mcfmcf per monthbbl per month002,5005005,0001,0007,5001,50010k2,00012.5k2,500Oct 23Jan 24AprJulOctJan 25AprJulOctJan 26AprJul
Gas output fell 54% over the last 12 monthsMonthly gas production and oil for DULLYE 01, Aug 2023 to Jul 2026. Gas output fell 54% over the last 12 months. 8,735 mcf in the 12 months through Jul 2026, against 18,899 mcf in the 12 months before.Last 12 monthsmcf per monthbbl per month002,5005005,0001,0007,5001,50010k2,00012.5k2,500Jan 24JulJan 25JulJan 26Jul

SourceTexas Railroad Commission Production Data Query, through Jul 2026.

Where the gas went

96% of the gas went to a processing plant in the last 12 months

  • Processing plant (3)
  • Lease fuel (1)
96% 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. 96% 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
96% 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. 96% 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)

    96% · 16,228 mcf

  • Lease fuel (1)

    4.3% · 734 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
42-255-3445303HActive

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
42-255-3445303H704

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 DULLYE 01
MonthOil producedbblOil soldbblGas producedmcfGas soldmcf, codes 2+3FlaredmcfWTI$/bblHenry Hub$/MMBtu
Jul 2026Marathon Oil1041049118440$80.46$2.89
Jun 2026Marathon Oil1871871,6681,4920$84.81$3.15
May 2026Marathon Oil2642641,3831,2870$102.13$2.94
Apr 2026Marathon Oil2592591,1681,1040$100.32$2.77
Mar 2026Marathon Oil8188183,4783,2900$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 Oil26261271200$60.06$3.79
Oct 2025Marathon Oil00000$60.89$3.19
Sep 2025Marathon Oil00000$63.96$2.97
Aug 2025Marathon Oil00000$64.86$2.91
Jul 2025Marathon Oil74742732640$68.39$3.20
Jun 2025Marathon Oil2442449168950$68.17$3.02
May 2025Marathon Oil1621627207050$62.17$3.12
Apr 2025Marathon Oil4144142,6962,6430$63.54$3.42
Mar 2025Marathon Oil00000$68.24$4.12
Feb 2025Marathon Oil00000$71.53$4.19
Jan 2025Marathon Oil1791791,2741,2600$75.74$4.13
Dec 2024Marathon Oil4144142,3482,3240$70.12$3.01
Nov 2024Marathon Oil4064062,5422,5190$69.95$2.12
Oct 2024Marathon Oil4174172,3332,2910$71.99$2.20
Sep 2024Marathon Oil4174172,3252,2840$70.24$2.28
Aug 2024Marathon Oil4804803,4723,4020$76.68$1.99
Jul 2024Marathon Oil5215214,2514,2510$81.80$2.07
Jun 2024Marathon Oil5895894,2614,2470$79.77$2.54
May 2024Marathon Oil1,6971,69711,64311,5920$80.02$2.12
Apr 2024Marathon Oil1,2971,2978,0677,9910$85.35$1.60
Mar 2024Marathon Oil00000$81.28$1.49
Feb 2024Marathon Oil2712711,8781,7890$77.25$1.72
Jan 2024Marathon Oil3933932,8562,7360$74.15$3.18
Dec 2023Marathon Oil4204203,1172,9890$71.90$2.52
Nov 2023Marathon Oil3913912,9902,8820$77.69$2.71
Oct 2023Marathon Oil4054053,1253,0170$85.64$2.98
Sep 2023Marathon Oil3853853,0702,9760$89.43$2.64
Aug 2023Marathon Oil4014013,2823,1870$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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