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 - Sep 2025
Total Oil Production1,314,364 BBLs
Total Gas Production1,612,592 MCF
Recent Oil Production6,282 BBLs in Aug 2025
Recent Gas Production5,786 MCF in Aug 2025
Wells on Property4

Our Valuation Estimates for Forister-Janysek Unit

ShaleAssessment

Not Available

MarketMultiple

$856,271 **

* 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 Sep 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, TX11,262 BBLs35,322 MCFSep 2025
FertschKarnes County, TX153 BBLs0 MCFAug 2025
Forister 541Karnes County, TX14,750 BBLs29,716 MCFSep 2025
Hysaw-HobsonKarnes County, TX5 BBLs0 MCFSep 2025
L. Pittman- F. Janysek Unit SaKarnes County, TX1,135 BBLs2,908 MCFSep 2025
Labus Pittman UnitKarnes County, TX5,885 BBLs7,582 MCFSep 2025
M.-Moczygemba M.-Jonas C SaKarnes County, TX993 BBLs1,723 MCFSep 2025
Martinez HenkeKarnes County, TX1,264 BBLs669 MCFSep 2025
Martinez UnitKarnes County, TX1,176 BBLs674 MCFSep 2025
Maurer BooneKarnes County, TX48 BBLs0 MCFSep 2025
Maurer-McFarland UnitKarnes County, TX9,176 BBLs20,001 MCFSep 2025
Maurer-Swize McFarland SaKarnes County, TX886 BBLs2,575 MCFSep 2025
Medina Trial UnitKarnes County, TX1,401 BBLs3,621 MCFSep 2025
Medina-HoffmanKarnes County, TX9,175 BBLs13,850 MCFSep 2025
Medina-JonasKarnes County, TX13,085 BBLs16,772 MCFSep 2025
Mohr-Hons Medina-Hoffman SaKarnes County, TX1,768 BBLs1,510 MCFSep 2025
Mohr-Hons UnitKarnes County, TX8,695 BBLs10,255 MCFSep 2025
Mohr-Moczygemba UnitKarnes County, TX1,255 BBLs1,190 MCFSep 2025
RzeppaKarnes County, TX0 BBLs0 MCFJul 2025
Swize McFarland UnitKarnes County, TX6,975 BBLs12,734 MCFSep 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
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 UNITApr 2025MARATHON OIL EF LLCMARATHON OIL EF LLC
02-10009FORISTER-JANYSEK UNITMar 2025MARATHON OIL EF LLCMARATHON OIL EF LLC
02-10009FORISTER-JANYSEK UNITMar 2025MARATHON OIL EF LLC
02-10009FORISTER-JANYSEK UNITMar 2025MARATHON OIL EF LLCMARATHON OIL EF LLC
02-10009FORISTER-JANYSEK UNITMar 2025DCP OPERATING COMPANY, LPMARATHON OIL EF LLC
02-10009FORISTER-JANYSEK UNITMar 2025TARGA MIDSTREAM SERVICES LLCMARATHON OIL EF LLC
02-10009FORISTER-JANYSEK UNITMar 2025ENERFIN AGUA DULCE LPMARATHON OIL EF LLC
02-10009FORISTER-JANYSEK UNITFeb 2025MARATHON OIL EF LLCMARATHON OIL EF LLC
02-10009FORISTER-JANYSEK UNITFeb 2025MARATHON OIL EF LLC
02-10009FORISTER-JANYSEK UNITFeb 2025MARATHON OIL EF LLCMARATHON OIL EF LLC
02-10009FORISTER-JANYSEK UNITFeb 2025DCP OPERATING COMPANY, LPMARATHON OIL EF LLC
02-10009FORISTER-JANYSEK UNITFeb 2025TARGA MIDSTREAM SERVICES LLCMARATHON OIL EF LLC
02-10009FORISTER-JANYSEK UNITFeb 2025ENERFIN AGUA DULCE LPMARATHON OIL EF LLC
02-10009FORISTER-JANYSEK UNITJan 2025MARATHON OIL EF LLCMARATHON OIL EF LLC
02-10009FORISTER-JANYSEK UNITJan 2025MARATHON OIL EF LLC
02-10009FORISTER-JANYSEK UNITJan 2025MARATHON OIL EF LLCMARATHON OIL EF LLC
02-10009FORISTER-JANYSEK UNITJan 2025DCP OPERATING COMPANY, LPMARATHON OIL EF LLC
02-10009FORISTER-JANYSEK UNITJan 2025TARGA MIDSTREAM SERVICES LLCMARATHON OIL EF LLC
02-10009FORISTER-JANYSEK UNITJan 2025ENERFIN AGUA DULCE LPMARATHON OIL EF LLC
02-10009FORISTER-JANYSEK UNITDec 2024MARATHON OIL EF LLCMARATHON OIL EF LLC
02-10009FORISTER-JANYSEK UNITDec 2024MARATHON OIL EF LLC
02-10009FORISTER-JANYSEK UNITDec 2024MARATHON OIL EF LLCMARATHON OIL EF LLC
02-10009FORISTER-JANYSEK UNITDec 2024DCP OPERATING COMPANY, LPMARATHON OIL EF LLC
02-10009FORISTER-JANYSEK UNITDec 2024TARGA MIDSTREAM SERVICES LLCMARATHON OIL EF LLC
02-10009FORISTER-JANYSEK UNITDec 2024ENERFIN AGUA DULCE LPMARATHON OIL EF LLC