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Royalty Clerk

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.

Gas well dossier

56,741mcf gas, last 12 months+1% vs prior year
Operator
Marathon Oil Ef LLC
County
Karnes County
Field
Sugarkane (Eagle Ford)
RRC lease
02-290481

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Where it sits

This county

Karnes CountyKarnesAtascosaGoliadWilsonGonzalesDe WittBexarKarnes County
Karnes County
Oil, last 12 months
15,374 bbl
Gas in Jul 2026
5,627 mcf

Production by month

Gas output held steady over the last 12 months

  • Gas (bars)
  • Oil (line)
  • Last 12 months
Gas output held steady over the last 12 monthsMonthly gas production and oil for SIENKIEWICZ UNIT, Aug 2023 to Jul 2026. Gas output held steady over the last 12 months. 56,741 mcf in the 12 months through Jul 2026, against 56,222 mcf in the 12 months before.Last 12 months: 56,741 mcfmcf per monthbbl per month002,5001,0005,0002,0007,5003,00010k4,00012.5k5,000Oct 23Jan 24AprJulOctJan 25AprJulOctJan 26AprJul
Gas output held steady over the last 12 monthsMonthly gas production and oil for SIENKIEWICZ UNIT, Aug 2023 to Jul 2026. Gas output held steady over the last 12 months. 56,741 mcf in the 12 months through Jul 2026, against 56,222 mcf in the 12 months before.Last 12 monthsmcf per monthbbl per month002,5001,0005,0002,0007,5003,00010k4,00012.5k5,000Jan 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 3.7% 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 3.7% 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
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 3.7% 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)

    75% · 42,620 mcf

  • Lease fuel (1)

    23% · 13,299 mcf

  • Flared (4)

    1.4% · 822 mcf

1.4% of the gas flared in the last 12 months. One month above 3%.

Wells on this lease

No wells are linked to this lease in our data

Production is still reported at lease level.

Buyers and gatherers

Companies named on the Form P-4, by product
CompanyProductRoleShare%From
Plains Pipeline L.p.CondensateGathers80Jan 14, 2021
Harvest Midstream CompanyCondensateGathers5Jan 14, 2021
Marathon Oil Ef LLCCondensateGathers5Jan 14, 2021
Statewide Crude Inc.CondensateGathers5Jan 14, 2021
Trafigura Trading LLCCondensateGathers5Jan 14, 2021
Marathon Oil Ef LLCGas-well gasBuys100Jan 14, 2021
Marathon Oil Ef LLCGas-well gasGathers100Jan 14, 2021

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

Who buys my oilOil price check

764.49 acres on the newest permit

Permits for Sienkiewicz Unit
API numberWell no.Acreson the permit
42-255-34737505H764.49

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 20267428315,6274,72114$80.46$2.89
Jun 20261,1521,0317,1144,491157$84.81$3.15
May 2026161386,0104,646104$102.13$2.94
Apr 20261,2031,1695,1793,736193$100.32$2.77
Mar 20261,2131,2063,9672,95462$91.38$3.04
Feb 20261,3631,3845,1733,92526$64.51$3.62
Jan 20261,5961,5905,1973,96566$60.04$7.72
Dec 20251,9381,9023,8352,78858$57.97$4.26
Nov 20251,6361,6514,1063,26642$60.06$3.79
Oct 20251,9601,9484,0963,15643$60.89$3.19
Sep 20259981,0112,8642,26235$63.96$2.97
Aug 20251,5571,5653,5732,71022$64.86$2.91
Jul 20251,4391,3962,8501,91418$68.39$3.20
Jun 20257587463,4522,61229$68.17$3.02
May 20258348654,4343,36412$62.17$3.12
Apr 20251,4851,4534,3873,32417$63.54$3.42
Mar 20257558082,7052,0908$68.24$4.12
Feb 20251,3501,3222,7792,12024$71.53$4.19
Jan 20251,3051,3373,6912,91224$75.74$4.13
Dec 20242,0251,9934,4883,40522$70.12$3.01
Nov 20241,2341,2404,2013,28826$69.95$2.12
Oct 20241,6421,6425,6634,63872$71.99$2.20
Sep 20242,2352,2257,1005,77730$70.24$2.28
Aug 20241,2851,25710,4728,58321$76.68$1.99
Jul 20244684799,8778,27328$81.80$2.07
Jun 20241,1551,17910,9139,29323$79.77$2.54
May 20241,8571,87311,2869,60623$80.02$2.12
Apr 20243,0353,0359,5618,11427$85.35$1.60
Mar 20242,4252,3935,9645,20016$81.28$1.49
Feb 20241,9752,0257,8717,18412$77.25$1.72
Jan 20243,6143,5627,7076,92235$74.15$3.18
Dec 20232,1462,1476,7316,00413$71.90$2.52
Nov 20232,0412,0437,5716,87415$77.69$2.71
Oct 20232,4162,4049,0018,29813$85.64$2.98
Sep 20231,9771,9927,5316,9469$89.43$2.64
Aug 20233,3373,3319,7248,9979$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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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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New drilling permits in Karnes County

Newest in the county: this lease has no coordinates.