Skip to content
Royalty Clerk

Texas oil lease

Producing

FORISTER-JANYSEK UNIT

Forister-Janysek Unit is an oil lease in Karnes County, Texas, operated by Marathon Oil Ef LLC in the Eagleville (Eagle Ford-2) field.

4 wells

58,982bbl oil, last 12 months−36% vs prior year
Operator
Marathon Oil Ef LLC
County
Karnes County
Field
Eagleville (Eagle Ford-2)
RRC lease
02-10009

Is your check right?

Check my statement

Where it sits

This county

Karnes CountyKarnesAtascosaGoliadWilsonGonzalesDe WittBexarKarnes County
Karnes County
Gas, last 12 months
50,342 mcf
Oil in Jul 2026
4,991 bbl

Production by month

Oil output fell 36% over the last 12 months

  • Oil (bars)
  • Gas (line)
  • Last 12 months
Oil output fell 36% over the last 12 monthsMonthly oil production and gas for FORISTER-JANYSEK UNIT, Aug 2023 to Jul 2026. Oil output fell 36% over the last 12 months. 58,982 bbl in the 12 months through Jul 2026, against 92,018 bbl in the 12 months before.Last 12 months: 58,982 bblbbl per monthmcf per month005,0005,00010k10k15k15k20k20kOct 23Jan 24AprJulOctJan 25AprJulOctJan 26AprJul
Oil output fell 36% over the last 12 monthsMonthly oil production and gas for FORISTER-JANYSEK UNIT, Aug 2023 to Jul 2026. Oil output fell 36% over the last 12 months. 58,982 bbl in the 12 months through Jul 2026, against 92,018 bbl in the 12 months before.Last 12 monthsbbl per monthmcf per month005,0005,00010k10k15k15k20k20kJan 24JulJan 25JulJan 26Jul

SourceTexas Railroad Commission Production Data Query, through Jul 2026.

Where the gas went

71% of the gas went to a processing plant in the last 12 months

  • Processing plant (3)
  • Lease fuel (1)
  • Flared (4)
71% of the gas went to a processing plant in the last 12 monthsShare of FORISTER-JANYSEK UNIT gas by disposition code each month, Aug 2023 to Jul 2026. 71% 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
71% of the gas went to a processing plant in the last 12 monthsShare of FORISTER-JANYSEK UNIT gas by disposition code each month, Aug 2023 to Jul 2026. 71% 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)

    71% · 35,722 mcf

  • Lease fuel (1)

    28% · 13,966 mcf

  • Flared (4)

    1.3% · 654 mcf

1.3% of the gas flared in the last 12 months. No month above 3%.

4 wells on this lease

Wells on FORISTER-JANYSEK UNIT
API numberWell no.Status
42-255-323111HActive
42-255-353652HActive
42-255-353663HActive
42-255-376214HActive

SourceTexas Railroad Commission Wellbore Query.

Buyers and gatherers

Companies named on the Form P-4, by product
CompanyProductRoleShare%FromUntil
Endeavor Crude, LLCOilGathers25Jan 1, 2024–
Enterprise Crude Oil LLCOilGathers25Jan 1, 2024–
Genesis Crude Oil, L.p.OilGathers25Jan 1, 2024–
Statewide Crude Inc.OilGathers25Jan 1, 2024–
Marathon Oil Ef LLCCasinghead gasBuys100Nov 1, 2021–
Marathon Oil Ef LLCCasinghead gasGathers100Nov 1, 2021–
Dks Transport LLCOilGathers25Nov 1, 2021Jan 1, 2024
Harvest Midstream CompanyOilGathers25Nov 1, 2021Jan 1, 2024
Plains Pipeline L.p.OilGathers25Nov 1, 2021Jan 1, 2024
Reynolds Energy Transport LLCOilGathers25Jul 1, 2022Jan 1, 2024
Gulfmark Energy, Inc.OilGathers25Nov 1, 2021Jul 1, 2022
Gulfmark Energy, Inc.OilGathers10Mar 24, 2012Nov 1, 2021

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

Who buys my oilOil price check

276.72 acres on the newest permit

  • Good to know

    The wells on this lease state different acreage

    The permits state between 271.59 and 276.72 acres. Use the acres from your own division order for the well you are paid on.

  • Worth asking

    A Rule 37 case is listed

    The RRC permit records list a Rule 37 case. This does not establish your royalty share. Ask for the permit and unit plat for your well.

Check your decimal on this lease
Permits for Forister-Janysek Unit
API numberWell no.Acreson the permit
42-255-376214H276.72
42-255-353652H276.72
42-255-353663H276.72
42-255-323111H271.59

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 FORISTER-JANYSEK UNIT
MonthOil producedbblOil soldbblGas producedmcfGas soldmcf, codes 2+3FlaredmcfWTI$/bblHenry Hub$/MMBtu
Jul 20264,9915,0353,6992,13142$80.46$2.89
Jun 20265,6285,6124,0472,62752$84.81$3.15
May 20265,1575,1172,1511,30726$102.13$2.94
Apr 20263,7913,7922,3071,57124$100.32$2.77
Mar 20264,4134,4373,3292,29457$91.38$3.04
Feb 20265,4565,43710,2057,197178$64.51$3.62
Jan 20264,3804,3742,9202,13270$60.04$7.72
Dec 20255,5685,5493,7862,85741$57.97$4.26
Nov 20253,6423,6544,3383,25051$60.06$3.79
Oct 20254,2674,2662,8212,10220$60.89$3.19
Sep 20255,4075,4174,9533,76921$63.96$2.97
Aug 20256,2826,3115,7864,48572$64.86$2.91
Jul 20256,2586,2395,3974,12452$68.39$3.20
Jun 20256,3206,3235,4364,13350$68.17$3.02
May 20257,2687,3696,2064,77557$62.17$3.12
Apr 20256,8136,7095,4544,22951$63.54$3.42
Mar 20257,9837,9877,2455,46945$68.24$4.12
Feb 20256,5196,5337,3955,60854$71.53$4.19
Jan 20258,4038,40213,30810,061109$75.74$4.13
Dec 20249,8089,7977,6035,90541$70.12$3.01
Nov 202410,35310,3478,8957,06745$69.95$2.12
Oct 202411,05311,01610,5928,49563$71.99$2.20
Sep 20245,5565,55111,6729,29280$70.24$2.28
Aug 20245,6845,6677,3055,82553$76.68$1.99
Jul 20244,1814,1751,8671,52214$81.80$2.07
Jun 20243,8913,9145,2664,40131$79.77$2.54
May 20246,7086,7269,7608,30151$80.02$2.12
Apr 20248,8928,91612,50310,477146$85.35$1.60
Mar 202413,32913,27817,90015,27180$81.28$1.49
Feb 20246,2726,2687,3246,03969$77.25$1.72
Jan 20242,8292,8233,0372,25936$74.15$3.18
Dec 20236,1286,1287,3326,17241$71.90$2.52
Nov 20236,2456,2478,2406,97350$77.69$2.71
Oct 20237,1607,1579,8038,53428$85.64$2.98
Sep 20236,9596,98611,1009,73029$89.43$2.64
Aug 20237,5857,59511,4139,83640$81.39$2.58

SourceTexas Railroad Commission Production Data Query, through Jul 2026. Prices: EIA, through Aug 2026. Updated Oct 2, 2026.

How to check your stub against this lease Checks stopped on this lease? See the likely reasons

Do your checks match this lease?

Check my statement

Nearby

This lease belongs to

OperatorMarathon Oil Ef LLCFieldEagleville (Eagle Ford-2)CountyKarnes County

Marathon Oil Ef LLC in Karnes County

All Marathon Oil Ef LLC leases →

Eagleville (Eagle Ford-2) field

All leases in this field →

Leases within 10 km

Drilling permits within 10 km