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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

664mcf gas, last 12 months−89% vs prior year
Operator
Marathon Oil Ef LLC
County
Karnes County
Field
Sugarkane (Eagle Ford)
RRC lease
02-268782

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Where it sits

This county

Karnes CountyKarnesAtascosaGoliadWilsonGonzalesDe WittBexarKarnes County
Karnes County
Oil, last 12 months
1,915 bbl
Gas in Jul 2026
167 mcf

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 SIENKIEWICZ UNIT, Aug 2023 to Jul 2026. Gas output fell 89% over the last 12 months. 664 mcf in the 12 months through Jul 2026, against 6,106 mcf in the 12 months before.Last 12 months: 664 mcfmcf per monthbbl per month001,0001002,0002003,0003004,0004005,000500Oct 23Jan 24AprJulOctJan 25AprJulOctJan 26AprJul
Gas output fell 89% over the last 12 monthsMonthly gas production and oil for SIENKIEWICZ UNIT, Aug 2023 to Jul 2026. Gas output fell 89% over the last 12 months. 664 mcf in the 12 months through Jul 2026, against 6,106 mcf in the 12 months before.Last 12 monthsmcf per monthbbl per month001,0001002,0002003,0003004,0004005,000500Jan 24JulJan 25JulJan 26Jul

SourceTexas Railroad Commission Production Data Query, through Jul 2026.

Where the gas went

Since Nov 2023 the lease's gas goes to a processing plant instead of lease fuel

Flaring peaked at 3.9% of the gas in Apr 2026.

  • Processing plant (3)
  • Lease fuel (1)
  • Flared (4)
Since Nov 2023 the lease's gas goes to a processing plant instead of lease fuelShare of SIENKIEWICZ UNIT gas by disposition code each month, Aug 2023 to Jul 2026. Since Nov 2023 the lease's gas goes to a processing plant instead of lease fuel. Flaring peaked at 3.9% of the gas in Apr 2026.Share of the lease’s gas by disposition code, per month0%50%100%Nov 2023: fuel to plantFlared 3.9%Oct 23Jan 24AprJulOctJan 25AprJulOctJan 26AprJul
Since Nov 2023 the lease's gas goes to a processing plant instead of lease fuelShare of SIENKIEWICZ UNIT gas by disposition code each month, Aug 2023 to Jul 2026. Since Nov 2023 the lease's gas goes to a processing plant instead of lease fuel. Flaring peaked at 3.9% of the gas in Apr 2026.Share of gas by disposition code0%50%100%Nov 23: fuel to plantFlared 3.9%Jan 24JulJan 25JulJan 26Jul

SourceTexas Railroad Commission Production Data Query, through Jul 2026.

  • Processing plant (3)

    75% · 501 mcf

  • Lease fuel (1)

    23% · 154 mcf

  • Flared (4)

    1.4% · 9 mcf

1.4% 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
42-255-325755HActive

SourceTexas Railroad Commission Wellbore Query.

Buyers and gatherers

Companies named on the Form P-4, by product
CompanyProductRoleShare%FromUntil
Reynolds Energy Transport LLCCondensateGathers50Jul 1, 2022–
Statewide Crude Inc.CondensateGathers50Jul 1, 2022–
Marathon Oil Ef LLCGas-well gasBuys100Nov 14, 2012–
Marathon Oil Ef LLCGas-well gasGathers100Nov 14, 2012–
Gulfmark Energy, Inc.CondensateGathers10Nov 14, 2012Jul 1, 2022
Statewide Crude Inc.CondensateGathers90Nov 14, 2012Jul 1, 2022

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
42-255-325755H764.49

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 20264124051671400$80.46$2.89
Jun 20261019899632$84.81$3.15
May 202617017642321$102.13$2.94
Apr 2026137133129935$100.32$2.77
Mar 202614413721160$91.38$3.04
Feb 202610611217130$64.51$3.62
Jan 202614114039300$60.04$7.72
Dec 202515315050361$57.97$4.26
Nov 202513013024190$60.06$3.79
Oct 202513213123180$60.89$3.19
Sep 202567741190$63.96$2.97
Aug 202522222342320$64.86$2.91
Jul 202520520853360$68.39$3.20
Jun 202527227337280$68.17$3.02
May 2025440437114870$62.17$3.12
Apr 20253183121901441$63.54$3.42
Mar 20251841932461901$68.24$4.12
Feb 20252702582,8312,15925$71.53$4.19
Jan 202510711130240$75.74$4.13
Dec 202419619862470$70.12$3.01
Nov 20242282282,2551,76514$69.95$2.12
Oct 202426826576621$71.99$2.20
Sep 202426327272590$70.24$2.28
Aug 20244004021401150$76.68$1.99
Jul 20243733661311100$81.80$2.07
Jun 20243943981591360$79.77$2.54
May 20244864806345401$80.02$2.12
Apr 20243723705134361$85.35$1.60
Mar 202424424394820$81.28$1.49
Feb 20242902893,4073,0067$77.25$1.72
Jan 20242002001,2311,0279$74.15$3.18
Dec 20232602623,4432,88010$71.90$2.52
Nov 20233803771,40992910$77.69$2.71
Oct 202322021925865$85.64$2.98
Sep 202321521639526$89.43$2.64
Aug 2023271270606617$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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