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Texas gas well

Producing

SIENKIEWICZ UNIT

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

1 well

15,402mcf gas, last 12 months+27% vs prior year
Operator
Marathon Oil Ef LLC
County
Karnes County
Field
Sugarkane (Eagle Ford)
RRC lease
02-283778

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Where it sits

This county

Karnes CountyKarnesAtascosaGoliadWilsonGonzalesDe WittBexarKarnes County
Karnes County
Oil, last 12 months
11,633 bbl
Gas in Jul 2026
2,741 mcf

Production by month

Gas output rose 27% over the last 12 months

  • Gas (bars)
  • Oil (line)
  • Last 12 months
Gas output rose 27% over the last 12 monthsMonthly gas production and oil for SIENKIEWICZ UNIT, Aug 2023 to Jul 2026. Gas output rose 27% over the last 12 months. 15,402 mcf in the 12 months through Jul 2026, against 12,097 mcf in the 12 months before.Last 12 months: 15,402 mcfmcf per monthbbl per month001,0005002,0001,0003,0001,5004,0002,000Oct 23Jan 24AprJulOctJan 25AprJulOctJan 26AprJul
Gas output rose 27% over the last 12 monthsMonthly gas production and oil for SIENKIEWICZ UNIT, Aug 2023 to Jul 2026. Gas output rose 27% over the last 12 months. 15,402 mcf in the 12 months through Jul 2026, against 12,097 mcf in the 12 months before.Last 12 monthsmcf per monthbbl per month001,0005002,0001,0003,0001,5004,0002,000Jan 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

Flaring peaked at 3.7% of the gas in Apr 2026.

  • Processing plant (3)
  • Lease fuel (1)
  • Flared (4)
77% of the gas went to a processing plant in the last 12 monthsShare of SIENKIEWICZ UNIT 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. Flaring peaked at 3.7% of the gas in Apr 2026.Share of the lease’s gas by disposition code, per month0%50%100%Flared 3.7%Oct 23Jan 24AprJulOctJan 25AprJulOctJan 26AprJul
77% of the gas went to a processing plant in the last 12 monthsShare of SIENKIEWICZ UNIT 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. Flaring peaked at 3.7% of the gas in Apr 2026.Share of gas by disposition code0%50%100%Flared 3.7%Jan 24JulJan 25JulJan 26Jul

SourceTexas Railroad Commission Production Data Query, through Jul 2026.

  • Processing plant (3)

    77% · 11,836 mcf

  • Lease fuel (1)

    22% · 3,364 mcf

  • Flared (4)

    1.3% · 202 mcf

1.3% of the gas flared in the last 12 months. One month above 3%.

1 well on this lease

Wells on SIENKIEWICZ UNIT
API numberWell no.Status
42-255-34740504HActive

SourceTexas Railroad Commission Wellbore Query.

Buyers and gatherers

Companies named on the Form P-4, by product
CompanyProductRoleShare%From
Plains Pipeline L.p.CondensateGathers80Feb 3, 2016
Harvest Midstream CompanyCondensateGathers5Oct 1, 2018
Marathon Oil Ef LLCCondensateGathers5Feb 3, 2016
Statewide Crude Inc.CondensateGathers5Feb 3, 2016
Trafigura Trading LLCCondensateGathers5Feb 3, 2016
Marathon Oil Ef LLCGas-well gasBuys100Feb 3, 2016
Marathon Oil Ef LLCGas-well gasGathers100Feb 3, 2016

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

Who buys my oilOil price check

764.49 acres on the newest permit

Check your decimal on this lease
Permits for Sienkiewicz Unit
API numberWell no.Acreson the permit
42-255-34740504H764.49

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 SIENKIEWICZ UNIT
MonthOil producedbblOil soldbblGas producedmcfGas soldmcf, codes 2+3FlaredmcfWTI$/bblHenry Hub$/MMBtu
Jul 20261,1891,2062,7412,2997$80.46$2.89
Jun 202665162650531911$84.81$3.15
May 20269891,0481,5311,18426$102.13$2.94
Apr 20261,0421,0241,4901,07555$100.32$2.77
Mar 20261,1601,1601,6991,26527$91.38$3.04
Feb 20261,4021,3921,5671,1898$64.51$3.62
Jan 20261,1671,1541,08382614$60.04$7.72
Dec 20251,2451,2231,09979917$57.97$4.26
Nov 20251,0641,0501,09286911$60.06$3.79
Oct 202567868390970010$60.89$3.19
Sep 20254774741,00179112$63.96$2.97
Aug 20255695686855204$64.86$2.91
Jul 20254484525853934$68.39$3.20
Jun 20255665588216217$68.17$3.02
May 20256306291,0698113$62.17$3.12
Apr 20255375287555723$63.54$3.42
Mar 20253563619557383$68.24$4.12
Feb 20252952897705877$71.53$4.19
Jan 20253023083502762$75.74$4.13
Dec 20244254336524953$70.12$3.01
Nov 20245975888016275$69.95$2.12
Oct 202447246485670111$71.99$2.20
Sep 20243403511,8361,4948$70.24$2.28
Aug 20245035072,6472,1705$76.68$1.99
Jul 20245165042,5822,1637$81.80$2.07
Jun 20244244362,4232,0635$79.77$2.54
May 20247717583,3572,8577$80.02$2.12
Apr 20244514563,4652,94010$85.35$1.60
Mar 20245505413,0982,7019$81.28$1.49
Feb 20243623662,7572,2699$77.25$1.72
Jan 20244394352,8902,27527$74.15$3.18
Dec 20233683682,2791,74510$71.90$2.52
Nov 20233703712,2491,75311$77.69$2.71
Oct 20234574562,3491,9038$85.64$2.98
Sep 20234584592,1921,8345$89.43$2.64
Aug 20236196183,4942,9127$81.39$2.58

Flared above 3%

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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