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 - Mar 2026
Total Oil Production1,342,090 BBLs
Total Gas Production1,639,990 MCF
Recent Oil Production5,456 BBLs in Feb 2026
Recent Gas Production10,205 MCF in Feb 2026
Wells on Property4

Our Valuation Estimates for Forister-Janysek Unit

ShaleAssessment

Not Available

MarketMultiple

$587,137 **

* 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 Mar 2026

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, TX7,898 BBLs38,320 MCFMar 2026
Forister 541Karnes County, TX11,780 BBLs21,600 MCFMar 2026
Hysaw-HobsonKarnes County, TX5 BBLs0 MCFMar 2026
L. Pittman- F. Janysek Unit SaKarnes County, TX670 BBLs65 MCFMar 2026
Labus Pittman UnitKarnes County, TX3,617 BBLs3,223 MCFMar 2026
M.-Moczygemba M.-Jonas C SaKarnes County, TX1,820 BBLs2,111 MCFMar 2026
Martinez UnitKarnes County, TX816 BBLs210 MCFMar 2026
Martinez-HenkeKarnes County, TX0 BBLs0 MCFMar 2026
Maurer BooneKarnes County, TX116 BBLs0 MCFFeb 2026
Maurer-McFarland UnitKarnes County, TX3,642 BBLs18,689 MCFMar 2026
Maurer-Swize McFarland SaKarnes County, TX1,398 BBLs3,292 MCFMar 2026
Medina Trial UnitKarnes County, TX1,308 BBLs567 MCFMar 2026
Medina-HoffmanKarnes County, TX7,473 BBLs11,765 MCFMar 2026
Medina-JonasKarnes County, TX10,880 BBLs12,531 MCFMar 2026
Mohr-Hons Medina-Hoffman SaKarnes County, TX1,817 BBLs612 MCFMar 2026
Mohr-Hons UnitKarnes County, TX4,838 BBLs5,676 MCFMar 2026
Mohr-Moczygemba UnitKarnes County, TX942 BBLs744 MCFMar 2026
RzeppaKarnes County, TX2 BBLs0 MCFFeb 2026
S.McFarland-Challenger C SaKarnes County, TX428 BBLs349 MCFMar 2026
Swize McFarland UnitKarnes County, TX5,742 BBLs10,992 MCFMar 2026

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
2025AMBER HARVEST LLCFORISTER-JANYSEK UNIT W#1H-4HMARATHON OIL EF LLC
2025FREEHOLD ROYALTIES USA INCFORISTER-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 UNITMar 2026CONOCOPHILLIPS COMPANYCONOCOPHILLIPS COMPANY
02-10009FORISTER-JANYSEK UNITFeb 2026TARGA MIDSTREAM SERVICES LLCCONOCOPHILLIPS COMPANY
02-10009FORISTER-JANYSEK UNITFeb 2026CONOCOPHILLIPS COMPANYCONOCOPHILLIPS COMPANY
02-10009FORISTER-JANYSEK UNITFeb 2026DCP OPERATING COMPANY, LPCONOCOPHILLIPS COMPANY
02-10009FORISTER-JANYSEK UNITFeb 2026ENERFIN AGUA DULCE LPCONOCOPHILLIPS COMPANY
02-10009FORISTER-JANYSEK UNITFeb 2026CONOCOPHILLIPS COMPANYCONOCOPHILLIPS COMPANY
02-10009FORISTER-JANYSEK UNITFeb 2026CONOCOPHILLIPS COMPANYCONOCOPHILLIPS COMPANY
02-10009FORISTER-JANYSEK UNITJan 2026CONOCOPHILLIPS COMPANYCONOCOPHILLIPS COMPANY
02-10009FORISTER-JANYSEK UNITJan 2026DCP OPERATING COMPANY, LPCONOCOPHILLIPS COMPANY
02-10009FORISTER-JANYSEK UNITJan 2026ENERFIN AGUA DULCE LPCONOCOPHILLIPS COMPANY
02-10009FORISTER-JANYSEK UNITJan 2026CONOCOPHILLIPS COMPANYCONOCOPHILLIPS COMPANY
02-10009FORISTER-JANYSEK UNITJan 2026CONOCOPHILLIPS COMPANYCONOCOPHILLIPS COMPANY
02-10009FORISTER-JANYSEK UNITDec 2025CONOCOPHILLIPS COMPANYCONOCOPHILLIPS COMPANY
02-10009FORISTER-JANYSEK UNITDec 2025DCP OPERATING COMPANY, LPCONOCOPHILLIPS COMPANY
02-10009FORISTER-JANYSEK UNITDec 2025ENERFIN AGUA DULCE LPCONOCOPHILLIPS COMPANY
02-10009FORISTER-JANYSEK UNITDec 2025CONOCOPHILLIPS COMPANYCONOCOPHILLIPS COMPANY
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