TEXAS · WELLS · MITCHELL COUNTY · WESTBROOK SOUTHWEST UNIT LEASE · API 42-335-34548 · DISTRICT 7B

Westbrook Southwest Unit #448

Mitchell County · Westbrook field · Producing · Vertical

Westbrook Southwest Unit #448 (API 42-335-34548) is a well in Mitchell County operated by Grayrock Energy II LLC, completed May 31, 2006 and listed as producing on the RRC schedule.

The RRC has issued one drilling permit, issued December 22, 2005, permitted to 3,290 ft.

It was permitted by Gruy Petroleum Management CO. and has since transferred to Grayrock Energy II LLC on the wellbore schedule.

Completion filings report one formation top, including Clear Fork.

Its lease has reported 8.65M barrels of oil and 21 mcf of gas since January 1993, last reporting volume in April 2026. The lease carries 371 wells, so these are lease totals, not this well alone.

Operator of record

Grayrock Energy II LLC

Permitted by Gruy Petroleum Management Co.; the EWA schedule now lists a different operator.

Based in: Fort Worth, TX
P-5 status: Active (A)
P-5 last filed: Oct 16, 2025
Phone: (214) 234-9115

Watch this operator Watch Mitchell County

SOURCE · RRC EWA WELLBORE SCHEDULE

What each RRC source says

Wellbore schedule	Grayrock Energy II LLC
Production reports	Grayrock Energy II, LLCthrough Apr 2026
Latest permit	Gruy Petroleum Management Co.Dec 22, 2005

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

3,290: total depth, ft
1: permits on file
Dec 22, 2005: last permit issued
May 31, 2006: completed
8.65M: cumulative oil, bbl
21: cumulative gas, mcf

PRODUCTION FROM PDQ LEASE REPORTS · Jan 1993 THROUGH Apr 2026

Regulatory status · RRC wellbore file

Schedule: ON SCHEDULE
Completed: May 31, 2006
Shut in: —
Plugged: —

Operator's P-5 on the schedule: Active – Extension (X)

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 lease this well is completed on; they carry 371 wells in total, so volumes are shared.Why →

Lease	Field	Reporting operator	Wells	Oil, bbl	Gas, mcf	Reported
Westbrook Southwest Unit O-10-21120	Westbrook	Grayrock Energy II, LLC	371	8.65M	21	Jan 1993 – Apr 2026

Oil, barrels lease total

Last 12 months 130,319 · prior 12 134,739(-3%)

Chain of custody

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

1Meridian Oil Inc.Jan 1993 → Jul 1996
2Burlington Resources Oil&gas Co.Aug 1996 → Apr 1997
3Gruy Petroleum Management Co.May 1997 → Apr 2006
4Cimarex Energy Co. of ColoradoMay 2006 → Sep 2009
5Merit Energy CompanyOct 2009 → May 2017
6Rover Petroleum Operating, LLCJun 2017 → Dec 2023
7Grayrock Energy II, LLCJan 2024 → Apr 2026

Permits

Permit	Type	Operator	Received	Issued	Spud	Depth
611482-99	Drill	Gruy Petroleum Management Co.	Dec 22, 2005	Dec 22, 2005	Apr 12, 2006	3,600

Completions

Completed	Lease	Field	Operator	Status	Depth
May 31, 2006	Westbrook Southwest Unit O-10-21120	Westbrook	Grayrock Energy II LLC	Producing	3,290

Formation tops

As filed on W-2/G-1. Subsea from 2,130 ft elevation.Download CSV →

Formation	MD ft	Subsea
Clear ForkCLEARFORK	2,300	-170

Perforations

Perforated and open-hole intervals.

From	To	Type
2,377	2,534	Perforated

Casing

Strings as reported, shallowest first.

Casing in	Set at	Hole in	Cement
8.625	616	12.25	396 S
5.5	3,290	7.875	895 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 →

Suffix	RRC record date	W-2 / G-1 date	Logs referenced
00	Apr 19, 2007	Aug 7, 2006	Yes
00	Jan 8, 2007	—	—

Well logs

1 log loaded from the RRC's log index, the latest received May 22, 2007. Density, Neutron. These are the logs loaded into Petrora from the Railroad Commission's inventories, not necessarily every log run on the well. The RRC holds the files; each opens from its log search for the well. The kind is the RRC's description of the log; the interval is the one filed for it.

Open the RRC's log search for this well ↗

Logas described	Files	Intervalft, as filed	Datereceived	SizeMB
Neutron/Density PorosityCOMPENSATED NEUTRON THREE-DETECTOR LITHODENSITYSpans Clear Fork	TIFF	70 to 3,293	May 22, 2007run Apr 21, 2006	—

"Spans" is by this well's own filed formation tops: a formation runs from its top to the next deeper top filed, and the deepest runs to the bottom of the log. Depths are measured along the wellbore, so on a horizontal the lateral counts in the formation it was landed in.

Find logs withinmiles of this well:List →Map →

Search the well logs loaded into Petrora →

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 42-335-34548 → W-2, G-1, plugging reports, as PDFs
Completion packets for 42-335-34548 → scanned completion filings

The logs loaded for this well are under Well logs, with the RRC's log search for it.

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/33534548, documented in the API reference.