Texas oil lease

Shut in

MOBIL-COOK

Name: MOBIL-COOK monthly oil and gas production, Upton County, Texas
Creator: Texas Railroad Commission

Mobil-Cook is an oil lease in Upton County, Texas, operated by Extex Operating Company in the Heluma (Ellenburger) field.

1 well

0bbl oil, last 12 months

Operator: Extex Operating Company
County: Upton County
Field: Heluma (Ellenburger)
RRC lease: 7C-06197

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Where it sits

This county

Upton County

Oil in Jul 2026: 0 bbl
Reporting since: Nov 2020

Checks stopped on this lease?

Sales
No sales reported for the last 12 months of state data (through Jul 2026).

SourceRailroad Commission production, P-5 and P-4 records, data through Jul 2026.

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Production by month

No production to chart

The state shows zero oil and zero gas for all 36 months we hold (Aug 2023 to Jul 2026). A lease that is shut in or newly reported looks like this. The ledger below lists each month.

Where the gas went

No gas disposition reported for this lease

The operator has not reported where the gas went in the months we hold.

Who has run this lease

The operator changed once, most recently in Feb 2021

Extex Operating Company Feb 2021 to now
Legacy Reserves Operating LP Nov 2020 to Jan 2021

SourceTexas Railroad Commission Production Data Query, through Jul 2026.

1 well on this lease

Wells on MOBIL-COOK
API number	Well no.	Status
42-461-30268	4 L	Shut-in

SourceTexas Railroad Commission Wellbore Query.

Buyers and gatherers

Companies named on the Form P-4, by product
Company	Product	Role	Share%	From	Until
Echo Canyon Energy Prd Sply, LLC	Oil	Gathers	100	Sep 1, 2026	–
Mv Purchasing, LLC	Oil	Gathers	100	Jul 1, 2026	Sep 1, 2026
Dcp Operating Company, LP	Casinghead gas	Gathers	100	Apr 1, 2017	Jul 1, 2026
Dcp Operating Company, LP	Casinghead gas	Buys	100	Apr 1, 2017	Jul 1, 2026
Enterprise Crude Oil LLC	Oil	Gathers	100	May 1, 2010	Jul 1, 2026

SourceRailroad Commission Form P-4 file, Sep 24, 2026 (source).

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240 acres on the newest permit

Good to know
The wells on this lease state different acreage
The permits state between 240 and 320 acres. Use the acres from your own division order for the well you are paid on.
Worth asking
A Rule 37 case is listed
The RRC permit records list a Rule 37 case. This does not establish your royalty share. Ask for the permit and unit plat for your well.

Check your decimal on this lease

Permits for Mobil-Cook
API number	Well no.	Permit issued	Completed	Acreson the permit	Type
42-461-30146	1	Oct 22, 1993	Apr 10, 1973	240	Vertical
42-461-30146	1 L	Oct 22, 1993	Apr 20, 1973	240	Vertical
42-461-30206	3 L	Feb 19, 1991	Mar 20, 1974	320	Vertical
42-461-30172	2	–	Jul 26, 1973	–	–
42-461-30172	2 L	–	Jul 26, 1973	–	–
42-461-30268	4 L	–	Jul 26, 1974	–	–

SourceRailroad Commission drilling permits, Oct 3, 2026 (source 1, source 2).

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36 months, newest first

Ledger for MOBIL-COOK
Month	Operator	WTI$/bbl	Henry Hub$/MMBtu
Jul 2026Extex Operating	Extex Operating Company	$80.46	$2.89
Jun 2026Extex Operating	Extex Operating Company	$84.81	$3.15
May 2026Extex Operating	Extex Operating Company	$102.13	$2.94
Apr 2026Extex Operating	Extex Operating Company	$100.32	$2.77
Mar 2026Extex Operating	Extex Operating Company	$91.38	$3.04
Feb 2026Extex Operating	Extex Operating Company	$64.51	$3.62
Jan 2026Extex Operating	Extex Operating Company	$60.04	$7.72
Dec 2025Extex Operating	Extex Operating Company	$57.97	$4.26
Nov 2025Extex Operating	Extex Operating Company	$60.06	$3.79
Oct 2025Extex Operating	Extex Operating Company	$60.89	$3.19
Sep 2025Extex Operating	Extex Operating Company	$63.96	$2.97
Aug 2025Extex Operating	Extex Operating Company	$64.86	$2.91
Jul 2025Extex Operating	Extex Operating Company	$68.39	$3.20
Jun 2025Extex Operating	Extex Operating Company	$68.17	$3.02
May 2025Extex Operating	Extex Operating Company	$62.17	$3.12
Apr 2025Extex Operating	Extex Operating Company	$63.54	$3.42
Mar 2025Extex Operating	Extex Operating Company	$68.24	$4.12
Feb 2025Extex Operating	Extex Operating Company	$71.53	$4.19
Jan 2025Extex Operating	Extex Operating Company	$75.74	$4.13
Dec 2024Extex Operating	Extex Operating Company	$70.12	$3.01
Nov 2024Extex Operating	Extex Operating Company	$69.95	$2.12
Oct 2024Extex Operating	Extex Operating Company	$71.99	$2.20
Sep 2024Extex Operating	Extex Operating Company	$70.24	$2.28
Aug 2024Extex Operating	Extex Operating Company	$76.68	$1.99
Jul 2024Extex Operating	Extex Operating Company	$81.80	$2.07
Jun 2024Extex Operating	Extex Operating Company	$79.77	$2.54
May 2024Extex Operating	Extex Operating Company	$80.02	$2.12
Apr 2024Extex Operating	Extex Operating Company	$85.35	$1.60
Mar 2024Extex Operating	Extex Operating Company	$81.28	$1.49
Feb 2024Extex Operating	Extex Operating Company	$77.25	$1.72
Jan 2024Extex Operating	Extex Operating Company	$74.15	$3.18
Dec 2023Extex Operating	Extex Operating Company	$71.90	$2.52
Nov 2023Extex Operating	Extex Operating Company	$77.69	$2.71
Oct 2023Extex Operating	Extex Operating Company	$85.64	$2.98
Sep 2023Extex Operating	Extex Operating Company	$89.43	$2.64
Aug 2023Extex Operating	Extex Operating Company	$81.39	$2.58

SourceTexas Railroad Commission Production Data Query, through Jul 2026. Prices: EIA, through Aug 2026. Updated Oct 2, 2026.

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