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 - Oct 2025
Total Oil Production1,318,610 BBLs
Total Gas Production1,615,413 MCF
Recent Oil Production5,407 BBLs in Sep 2025
Recent Gas Production4,953 MCF in Sep 2025
Wells on Property4

Our Valuation Estimates for Forister-Janysek Unit

ShaleAssessment

Not Available

MarketMultiple

$797,958 **

* 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 Oct 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, TX9,508 BBLs39,619 MCFOct 2025
FertschKarnes County, TX160 BBLs0 MCFOct 2025
Forister 541Karnes County, TX14,330 BBLs24,634 MCFOct 2025
Hysaw-HobsonKarnes County, TX18 BBLs0 MCFSep 2025
L. Pittman- F. Janysek Unit SaKarnes County, TX1,124 BBLs3,481 MCFOct 2025
Labus Pittman UnitKarnes County, TX5,459 BBLs6,448 MCFOct 2025
M.-Moczygemba M.-Jonas C SaKarnes County, TX956 BBLs1,341 MCFOct 2025
Martinez HenkeKarnes County, TX1,351 BBLs614 MCFOct 2025
Martinez UnitKarnes County, TX1,190 BBLs335 MCFOct 2025
Maurer BooneKarnes County, TX75 BBLs0 MCFSep 2025
Maurer-McFarland UnitKarnes County, TX8,057 BBLs20,373 MCFOct 2025
Maurer-Swize McFarland SaKarnes County, TX984 BBLs2,010 MCFOct 2025
Medina Trial UnitKarnes County, TX2,432 BBLs3,935 MCFOct 2025
Medina-HoffmanKarnes County, TX8,185 BBLs12,586 MCFOct 2025
Medina-JonasKarnes County, TX13,087 BBLs14,653 MCFOct 2025
Mohr-Hons Medina-Hoffman SaKarnes County, TX2,135 BBLs1,853 MCFOct 2025
Mohr-Hons UnitKarnes County, TX8,284 BBLs10,265 MCFOct 2025
Mohr-Moczygemba UnitKarnes County, TX1,222 BBLs1,034 MCFOct 2025
RzeppaKarnes County, TX1 BBLs0 MCFSep 2025
Swize McFarland UnitKarnes County, TX9,069 BBLs16,931 MCFOct 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