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 - Apr 2026
Total Oil Production1,345,819 BBLs
Total Gas Production1,642,297 MCF
Recent Oil Production4,413 BBLs in Mar 2026
Recent Gas Production3,328 MCF in Mar 2026
Wells on Property4

Our Valuation Estimates for Forister-Janysek Unit

ShaleAssessment

Not Available

MarketMultiple

$555,489 **

* 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 Apr 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, TX8,674 BBLs31,092 MCFApr 2026
Forister 541Karnes County, TX14,035 BBLs19,010 MCFApr 2026
Hysaw-HobsonKarnes County, TX145 BBLs0 MCFApr 2026
L. Pittman- F. Janysek Unit SaKarnes County, TX757 BBLs1,140 MCFApr 2026
Labus Pittman UnitKarnes County, TX7,207 BBLs8,788 MCFApr 2026
M.-Moczygemba M.-Jonas C SaKarnes County, TX328 BBLs571 MCFApr 2026
Martinez UnitKarnes County, TX827 BBLs659 MCFApr 2026
Martinez-HenkeKarnes County, TX214 BBLs101 MCFApr 2026
Maurer BooneKarnes County, TX120 BBLs0 MCFMar 2026
Maurer-McFarland UnitKarnes County, TX6,312 BBLs18,234 MCFApr 2026
Maurer-Swize McFarland SaKarnes County, TX1,206 BBLs3,062 MCFApr 2026
Medina Trial UnitKarnes County, TX1,917 BBLs717 MCFApr 2026
Medina-HoffmanKarnes County, TX7,075 BBLs9,932 MCFApr 2026
Medina-JonasKarnes County, TX9,698 BBLs10,988 MCFApr 2026
Mohr-Hons Medina-Hoffman SaKarnes County, TX2,000 BBLs1,296 MCFApr 2026
Mohr-Hons UnitKarnes County, TX6,563 BBLs6,399 MCFApr 2026
Mohr-Moczygemba UnitKarnes County, TX897 BBLs413 MCFApr 2026
RzeppaKarnes County, TX0 BBLs0 MCFFeb 2026
S.McFarland-Challenger C SaKarnes County, TX452 BBLs129 MCFMar 2026
Swize McFarland UnitKarnes County, TX7,366 BBLs16,944 MCFApr 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
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 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