Forister-Janysek Unit

Oil & Gas Property in Karnes County, TX

Property Summary

Key data points for Forister-Janysek Unit

CountyKarnes County, TX
OperatorMARATHON OIL EF LLC
Production DatesApr 2012 - Nov 2025
Total Oil Production1,322,273 BBLs
Total Gas Production1,619,751 MCF
Recent Oil Production4,267 BBLs in Oct 2025
Recent Gas Production2,821 MCF in Oct 2025
Wells on Property4

Our Valuation Estimates for Forister-Janysek Unit

ShaleAssessment

Not Available

MarketMultiple

$669,326 **

* Assessment based on future expected revenue
** Based on a 36 month multiple of average monthly estimated revenue

Based on a decimal interest

Forister-Janysek Unit Production Graph

Aggregated production of all wells and leases associated with this property
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to oil and gas production for Forister-Janysek Unit
from Apr 2012 to Nov 2025

Wells on Forister-Janysek Unit

API #Well NameOperatorStatusCountyEst. Daily Oil Prod.Est. Daily Gas Prod.Est. Daily Water Prod.LatitudeLongitude
42-255-32311FORISTER-JANYSEK UNIT 1HMARATHON OIL EF LLCProducingKarnes County, TX28.885831-98.003871
42-255-35365FORISTER-JANYSEK UNIT 2HMARATHON OIL EF LLCProducingKarnes County, TX28.899985-98.005329
42-255-35366FORISTER-JANYSEK UNIT 3HMARATHON OIL EF LLCProducingKarnes County, TX28.899990-98.005235
42-255-37621FORISTER-JANYSEK UNIT 4HMARATHON OIL EF LLCProducingKarnes County, TX28.885732-97.999982

Leases included in Forister-Janysek Unit

Lease #Lease NameOperatorCountyMonthly Oil Prod.Monthly Gas Prod.
02-10009FORISTER-JANYSEK UNITMARATHON OIL EF LLCKarnes County, TX

Nearby Properties

These are the closest 20 properties to the Forister-Janysek Unit property.

Property NameLocationOil Prod.Gas Prod.Prod. Period
Charlotte UnitKarnes County, TX9,059 BBLs46,653 MCFNov 2025
FertschKarnes County, TX174 BBLs0 MCFOct 2025
Forister 541Karnes County, TX13,044 BBLs21,977 MCFNov 2025
Hysaw-HobsonKarnes County, TX1 BBLs0 MCFNov 2025
L. Pittman- F. Janysek Unit SaKarnes County, TX964 BBLs2,666 MCFNov 2025
Labus Pittman UnitKarnes County, TX5,702 BBLs6,783 MCFNov 2025
M.-Moczygemba M.-Jonas C SaKarnes County, TX1,082 BBLs1,783 MCFNov 2025
Martinez HenkeKarnes County, TX1,505 BBLs700 MCFNov 2025
Martinez UnitKarnes County, TX1,158 BBLs314 MCFNov 2025
Maurer BooneKarnes County, TX2 BBLs0 MCFNov 2025
Maurer-McFarland UnitKarnes County, TX8,375 BBLs22,048 MCFNov 2025
Maurer-Swize McFarland SaKarnes County, TX1,025 BBLs2,062 MCFNov 2025
Medina Trial UnitKarnes County, TX2,370 BBLs1,366 MCFNov 2025
Medina-HoffmanKarnes County, TX8,495 BBLs11,396 MCFNov 2025
Medina-JonasKarnes County, TX12,710 BBLs14,701 MCFNov 2025
Mohr-Hons Medina-Hoffman SaKarnes County, TX2,411 BBLs2,303 MCFNov 2025
Mohr-Hons UnitKarnes County, TX8,185 BBLs9,737 MCFNov 2025
Mohr-Moczygemba UnitKarnes County, TX1,114 BBLs989 MCFNov 2025
RzeppaKarnes County, TX0 BBLs0 MCFSep 2025
Swize McFarland UnitKarnes County, TX8,797 BBLs16,846 MCFNov 2025

Frac'ing activity on Forister-Janysek Unit

API #Well NameStart DateEnd DateVertical DepthTotal Water Volume
42-255-32311Forister Janyseck 1H
42-255-35365Forister Janysek 2H
42-255-35366Forister Janysek 3H
42-255-37621Forister-Janysek Unit 4H

Owners of Forister-Janysek Unit

Royalty Ownership data is obtained from public records
YearOwnerProperty NameOperatorPercentageInterest TypeAppraisal ValueLegal Desciption
2025MARATHON OIL EF LLCFORISTER-JANYSEK UNIT W#1H-4HMARATHON OIL EF LLC
2025GREEN JAY MINERALS LLCFORISTER-JANYSEK UNIT W#1H-4HMARATHON OIL EF LLC
2025LAWTER JACK W & DIANEFORISTER-JANYSEK UNIT W#1H-4HMARATHON OIL EF LLC
2025DIANE PETERS LIMITED PARTNERFORISTER-JANYSEK UNIT W#1H-4HMARATHON OIL EF LLC
2025PAWELEK ALANFORISTER-JANYSEK UNIT W#1H-4HMARATHON OIL EF LLC
2025FREEHOLD ROYALTIES USA INCFORISTER-JANYSEK UNIT W#1H-4HMARATHON OIL EF LLC
2025AMBER HARVEST LLCFORISTER-JANYSEK UNIT W#1H-4HMARATHON OIL EF LLC
2025EAGLE FORD AUSTIN INTERESTS LPFORISTER-JANYSEK UNIT W#1H-4HMARATHON OIL EF LLC
Displaying 8 of 15 Owners   --   Full Ownership Data Available for Subscribers Only

Oil & Gas Sales on Forister-Janysek Unit

Lease #Lease NameReporting PeriodProductVolumeValueGross PricePurchaserProducer
Lease #Lease NameReporting PeriodProductOil VolumeOil ValueCalculated Oil PricePurchaserProducer
02-10009FORISTER-JANYSEK UNITDec 2025CONOCOPHILLIPS COMPANYCONOCOPHILLIPS COMPANY
02-10009FORISTER-JANYSEK UNITNov 2025CONOCOPHILLIPS COMPANYCONOCOPHILLIPS COMPANY
02-10009FORISTER-JANYSEK UNITNov 2025DCP OPERATING COMPANY, LPCONOCOPHILLIPS COMPANY
02-10009FORISTER-JANYSEK UNITNov 2025ENERFIN AGUA DULCE LPCONOCOPHILLIPS COMPANY
02-10009FORISTER-JANYSEK UNITNov 2025CONOCOPHILLIPS COMPANYCONOCOPHILLIPS COMPANY
02-10009FORISTER-JANYSEK UNITNov 2025CONOCOPHILLIPS COMPANYCONOCOPHILLIPS COMPANY
02-10009FORISTER-JANYSEK UNITOct 2025CONOCOPHILLIPS COMPANYCONOCOPHILLIPS COMPANY
02-10009FORISTER-JANYSEK UNITOct 2025DCP OPERATING COMPANY, LPCONOCOPHILLIPS COMPANY
02-10009FORISTER-JANYSEK UNITOct 2025ENERFIN AGUA DULCE LPCONOCOPHILLIPS COMPANY
02-10009FORISTER-JANYSEK UNITOct 2025CONOCOPHILLIPS COMPANYCONOCOPHILLIPS COMPANY
02-10009FORISTER-JANYSEK UNITSep 2025CONOCOPHILLIPS COMPANYCONOCOPHILLIPS COMPANY
02-10009FORISTER-JANYSEK UNITSep 2025DCP OPERATING COMPANY, LPCONOCOPHILLIPS COMPANY
02-10009FORISTER-JANYSEK UNITSep 2025ENERFIN AGUA DULCE LPCONOCOPHILLIPS COMPANY
02-10009FORISTER-JANYSEK UNITSep 2025CONOCOPHILLIPS COMPANYCONOCOPHILLIPS COMPANY
02-10009FORISTER-JANYSEK UNITSep 2025CONOCOPHILLIPS COMPANYCONOCOPHILLIPS COMPANY
02-10009FORISTER-JANYSEK UNITAug 2025TARGA MIDSTREAM SERVICES LLCCONOCOPHILLIPS COMPANY
02-10009FORISTER-JANYSEK UNITAug 2025CONOCOPHILLIPS COMPANYCONOCOPHILLIPS COMPANY
02-10009FORISTER-JANYSEK UNITAug 2025DCP OPERATING COMPANY, LPCONOCOPHILLIPS COMPANY
02-10009FORISTER-JANYSEK UNITAug 2025ENERFIN AGUA DULCE LPCONOCOPHILLIPS COMPANY
02-10009FORISTER-JANYSEK UNITAug 2025CONOCOPHILLIPS COMPANYCONOCOPHILLIPS COMPANY
02-10009FORISTER-JANYSEK UNITAug 2025CONOCOPHILLIPS COMPANYCONOCOPHILLIPS COMPANY
02-10009FORISTER-JANYSEK UNITJul 2025TARGA MIDSTREAM SERVICES LLCCONOCOPHILLIPS COMPANY
02-10009FORISTER-JANYSEK UNITJul 2025CONOCOPHILLIPS COMPANYCONOCOPHILLIPS COMPANY
02-10009FORISTER-JANYSEK UNITJul 2025DCP OPERATING COMPANY, LPCONOCOPHILLIPS COMPANY
02-10009FORISTER-JANYSEK UNITJul 2025ENERFIN AGUA DULCE LPCONOCOPHILLIPS COMPANY