TEXAS · WELLS · UPTON COUNTY · API 42-461-33007 · DISTRICT 6E

Pegasus Pennsylvanian Unit #4

Plugged

Upton County · Pegasus (Consolidated) field · Vertical

Pegasus Pennsylvanian Unit #4 (API 42-461-33007) is a plugged well in Upton County, plugged September 16, 2020, last operated by Cog Operating LLC.

The RRC has issued 2 drilling permits between 1990 and 1991, permitted to 11,100 ft.

It was permitted by Mobil Producing TX. & N.M. Inc. and has since transferred to Cog Operating LLC on the wellbore schedule.

Completion filings report 4 formation tops, including San Andres, Clear Fork, Wolfcamp, Pennsylvanian.

Its 3 leases have reported 2.29M barrels of oil and 30.1M mcf of gas since January 1993, last reporting volume in April 2026. The leases carry 145 wells, so these are lease totals, not this well alone.

Operator of record

COG Operating LLC

Permitted by Mobil Producing TX. & N.M. Inc.; the EWA schedule now lists a different operator.

Based in: Midland, TX
P-5 status: Active – Extension (X)
P-5 last filed: Jun 2, 2026
Permits on file: 4,568
Phone: (432) 683-7443

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SOURCE · RRC EWA WELLBORE SCHEDULE

What each RRC source says

Wellbore schedule	COG Operating LLC
Production reports	COG Operating LLCthrough Apr 2026
Latest permit	Mobil Producing TX. & N.M. Inc.Apr 5, 1991

The sources disagree, which usually means a transfer or a lease-level production filing by a different entity. Petrora goes with the schedule.

11,100: total depth, ft
2: permits on file
Apr 5, 1991: last permit issued
May 15, 1990: completed
2.29M: cumulative oil, bbl
30.1M: cumulative gas, mcf

PRODUCTION FROM PDQ LEASE REPORTS · Jan 1993 THROUGH Apr 2026

Regulatory status · RRC wellbore file

Schedule: OFF SCHEDULE
Completed: May 15, 1990
Shut in: —
Plugged: Sep 16, 2020

Surface location

No coordinates on the permit record yet. The RRC's GIS record usually lands within days of issuance; historical master-file permits never carry one.

Lease production

PDQ LEASE REPORTS · REPORTED THROUGH APR 2026

Texas reports oil by lease, not by well. These are the 3 leases this well is completed on; they carry 145 wells in total, so volumes are shared.Why →

Lease	Field	Reporting operator	Wells	Oil, bbl	Gas, mcf	Reported
Pegasus Pennsylvanian Unit O-9-17148	Pegasus (Consolidated)	COG Operating LLC	46	386K	11.4M	May 2010 – Apr 2026
Pegasus Pennsylvanian Unit O-9-1178	Pegasus (Pennsylvanian)	COG Operating LLC	99	1.9M	18.7M	Jan 1993 – Apr 2010
— O-9-12836	—	—	0	0	0	—

Gas, mcf lease total

Last 12 months 195,448 · prior 12 272,799(-28%)

Oil, barrels lease total

Last 12 months 5,010 · prior 12 8,187(-39%)

Chain of custody

Every operator that reported production on this well's lease, in order.

1Mobil Producing TX. & N.M. Inc.Jan 1993 → Mar 1998
2Henry Petroleum Corp.Apr 1998 → Mar 2001
3Henry Petroleum LPApr 2001 → Dec 2008
4COG Operating LLCJan 2009 → Apr 2026

Permits

Permit	Type	Operator	Received	Issued	Spud	Depth
386302-99	Recompletion	Mobil Producing TX. & N.M. Inc.	Apr 1, 1991	Apr 5, 1991	Apr 4, 1991	10,762
370036-99	Drill	Mobil Producing TX. & N.M. Inc.	Feb 20, 1990	Feb 22, 1990	—	11,100

Completions

Completed	Lease	Field	Operator	Status	Depth
May 15, 1990	Pegasus Pennsylvanian Unit O-9-17148	Pegasus (Consolidated)	COG Operating LLC	Plugged	—
May 15, 1990	Powell Virgil B O-9-12836	Pegasus (Pennsylvanian)	Mobil Producing TX. & N.M. Inc.	Plugged	—
May 15, 1990	Powell Virgil B O-9-12836	Pegasus (Pennsylvanian)	Mobil Producing TX. & N.M. Inc.	Plugged	—
May 15, 1990	Pegasus Pennsylvanian Unit O-9-1178	Pegasus (Pennsylvanian)	COG Operating LLC	Plugged	—

Formation tops

As filed on W-2/G-1. Subsea from 2,881 ft elevation.Download CSV →

Formation	MD ft	Subsea
San Andres	4,806	-1,925
Clear ForkCLEARFORK LS	6,887	-4,006
Wolfcamp	9,186	-6,305
PennsylvanianPENN CANYON	10,002	-7,121

Perforations

Perforated and open-hole intervals.

From	To	Type
10,554	10,591	Perforated
10,554	10,619	Perforated

Casing

Strings as reported, shallowest first.

Casing in	Set at	Hole in	Cement
13.375	390	17.5	500 S
13.375	450	17.5	500 S
8.625	4,900	12.25	2,000 S

Completion filings

W-2 and G-1 reports on record in the RRC wellbore file, newest first. The suffix identifies the wellbore or completion event. The record date is the RRC's own date on the record, not the day the report was filed: 462,034 of the state's filings carry 1984-01-12. About these reports →

RRC record date	W-2 / G-1 date	Logs referenced
Jun 2, 2010	Jul 14, 1993	—
Aug 20, 1993	Jul 14, 1993	—
Sep 25, 1991	Sep 5, 1991	Yes
Jun 12, 1990	May 21, 1990	Yes
Jun 6, 1990	—	—

The source documents

Petrora holds the structured record. The scanned filings live at the RRC; these links open its search already filled in for this API.

Wellbore filings for 42-461-33007 → W-2, G-1, plugging reports, as PDFs
Completion packets for 42-461-33007 → scanned completion filings

Log images filed since 2004 open from the RRC's log search for this well; none are loaded here for it. The University Lands library has no per-well link: then paste it into its search.

Find logs withinmiles of this well:List →Map →

About this data

Permits from the RRC OGA049M master and daily daf420 files; wellbore and operator of record from the EWA schedule, weekly; completions, formation tops, casing, and perforations from the dbf900 wellbore file; production from PDQ lease reports, which lag two to three months; injection from UIC permits, H-10 reports, and TexNet daily volumes; earthquakes from the TexNet catalog.

New to these records? How to read a well page · API numbers · completion reports and tops · why production is by lease

Developers: this page as JSON is GET /v1/data/wells/46133007, documented in the API reference.