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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

9,023mcf gas, last 12 months−58% vs prior year
Operator
Marathon Oil Ef LLC
County
Karnes County
Field
Sugarkane (Eagle Ford)
RRC lease
02-284097

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Where it sits

This county

Karnes CountyKarnesAtascosaGoliadWilsonGonzalesDe WittBexarKarnes County
Karnes County
Oil, last 12 months
4,650 bbl
Gas in Jul 2026
267 mcf

Production by month

Gas output fell 58% over the last 12 months

  • Gas (bars)
  • Oil (line)
  • Last 12 months
Gas output fell 58% over the last 12 monthsMonthly gas production and oil for SIENKIEWICZ UNIT, Aug 2023 to Jul 2026. Gas output fell 58% over the last 12 months. 9,023 mcf in the 12 months through Jul 2026, against 21,699 mcf in the 12 months before.Last 12 months: 9,023 mcfmcf per monthbbl per month001,0002502,0005003,0007504,0001,0005,0001,250Oct 23Jan 24AprJulOctJan 25AprJulOctJan 26AprJul
Gas output fell 58% over the last 12 monthsMonthly gas production and oil for SIENKIEWICZ UNIT, Aug 2023 to Jul 2026. Gas output fell 58% over the last 12 months. 9,023 mcf in the 12 months through Jul 2026, against 21,699 mcf in the 12 months before.Last 12 monthsmcf per monthbbl per month001,0002502,0005003,0007504,0001,0005,0001,250Jan 24JulJan 25JulJan 26Jul

SourceTexas Railroad Commission Production Data Query, through Jul 2026.

Where the gas went

75% of the gas went to a processing plant in the last 12 months

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

  • Processing plant (3)
  • Lease fuel (1)
  • Flared (4)
75% 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. 75% of the gas went to a processing plant in the last 12 months. Flaring peaked at 3.9% of the gas in Apr 2026.Share of the lease’s gas by disposition code, per month0%50%100%Flared 3.9%Oct 23Jan 24AprJulOctJan 25AprJulOctJan 26AprJul
75% 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. 75% of the gas went to a processing plant in the last 12 months. Flaring peaked at 3.9% of the gas in Apr 2026.Share of gas by disposition code0%50%100%Flared 3.9%Jan 24JulJan 25JulJan 26Jul

SourceTexas Railroad Commission Production Data Query, through Jul 2026.

  • Processing plant (3)

    75% · 7,801 mcf

  • Lease fuel (1)

    23% · 2,426 mcf

  • Flared (4)

    1.1% · 109 mcf

1.1% 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
42-255-347957HShut-in

SourceTexas Railroad Commission Wellbore Query.

764.49 acres on the newest permit

Permits for Sienkiewicz Unit
API numberWell no.Acreson the permit
42-255-347957H764.49

SourceRailroad Commission drilling permits, Sep 26, 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 202619182672241$80.46$2.89
Jun 2026013000$84.81$3.15
May 20262953173712876$102.13$2.94
Apr 20263503441811307$100.32$2.77
Mar 2026391388122912$91.38$3.04
Feb 20264254296064603$64.51$3.62
Jan 202646746593271112$60.04$7.72
Dec 20255615571,4441,05022$57.97$4.26
Nov 20256336301,5901,26516$60.06$3.79
Oct 20255445501,3181,01514$60.89$3.19
Sep 20254204207395849$63.96$2.97
Aug 20255455561,4531,1029$64.86$2.91
Jul 20256376291,3138828$68.39$3.20
Jun 20255425341,5361,16213$68.17$3.02
May 20255955982,0401,5476$62.17$3.12
Apr 20256186101,9611,4868$63.54$3.42
Mar 20254594721,4311,1064$68.24$4.12
Feb 20254984923722843$71.53$4.19
Jan 20255735801,1969438$75.74$4.13
Dec 20247347322,0641,56610$70.12$3.01
Nov 20246676631,8391,43912$69.95$2.12
Oct 20246906882,1641,77327$71.99$2.20
Sep 20248498612,3851,94110$70.24$2.28
Aug 20248878933,3982,7857$76.68$1.99
Jul 20248688513,3542,8109$81.80$2.07
Jun 20248278293,6653,1218$79.77$2.54
May 20248638593,7553,1968$80.02$2.12
Apr 20249089113,6783,12210$85.35$1.60
Mar 20248288212,2261,9416$81.28$1.49
Feb 20248818892,9982,46110$77.25$1.72
Jan 20241,0371,0262,9382,31328$74.15$3.18
Dec 20238108132,5751,99711$71.90$2.52
Nov 20239039053,1862,62612$77.69$2.71
Oct 20231,1311,1283,6243,08310$85.64$2.98
Sep 20231,1121,1114,1503,5978$89.43$2.64
Aug 20231,2181,2154,6984,1217$81.39$2.58

Flared above 3%

SourceTexas Railroad Commission Production Data Query, through Jul 2026. Prices: EIA, through Aug 2026. Updated Sep 28, 2026.

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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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