WELL · 42-479-34471 · DISTRICT 4
Perez Unit 667 #1
Webb County · Guerra (10900) field · Vertical
Perez Unit 667 #1 (API 42-479-34471) is a well in Webb County operated by Tdc Engineering Inc., completed April 27, 1987.
The RRC has issued one drilling permit (amended once), issued January 27, 1987, permitted to 12,000 ft.
Completion filings report 4 formation tops, including Guerra (10600), Guerra 10600, Guerra (10900), Guerra 10900.
No lease production has been reported under this well’s leases.
Operator of record
- Based in
- Abilene, TX
- P-5 status
- Active (A)
- P-5 last filed
- Oct 16, 2025
- Permits on file
- 227
- Phone
- (325) 673-5024
SOURCE · RRC EWA WELLBORE SCHEDULE
What each RRC source says
| Wellbore schedule | TDC Engineering Inc. |
| Production reports | Hilcorp Energy Companythrough Apr 2026 |
| Latest permit | TDC Engineering, Inc.Jan 27, 1987 |
The sources disagree, which usually means a transfer or a lease-level production filing by a different entity. Petrora goes with the schedule.
- 12,000
- total depth, ft
- 2
- permits on file
- Jan 27, 1987
- last permit issued
- Apr 27, 1987
- completed
- 0
- cumulative oil, bbl
- 442K
- cumulative gas, mcf
PRODUCTION FROM PDQ LEASE REPORTS · Jan 1993 THROUGH Jul 2026
Regulatory status · RRC wellbore file
- Schedule
- OFF SCHEDULE
- Completed
- Apr 27, 1987
- Shut in
- —
- Plugged
- —
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 2 leases this well is completed on; this well is the only one on it.Why →
| Lease | Field | Reporting operator | Wells | Oil, bbl | Gas, mcf | Reported |
|---|---|---|---|---|---|---|
| Perez Unit 667 G-4-124166 | Guerra (10600) | Hilcorp Energy Company | 1 | 0 | 442K | Jan 1993 – Jul 2026 |
| — G-4-124165 | — | — | 0 | 0 | 0 | — |
Gas, mcf lease total
Last 12 months 1,955 · prior 12 2,674(-27%)
Chain of custody
Every operator that reported production on this well's lease, in order.
- 1TDC Engineering, Inc.Jan 1993 → Feb 1993
- 2Sonat Exploration Company -TylerMar 1993 → Nov 1993
- 3Sonat Exploration Co. - HoustonDec 1993 → Jul 1996
- 4Enron Oil & Gas CompanyAug 1996 → Sep 1999
- 5EOG Resources, Inc.Oct 1999 → Feb 2000
- 6Dolphin PetroleumJan 2001 → Nov 2001
- 7Ocean Energy, Inc.Mar 2002 → Aug 2003
- 8Devon Louisiana CorporationOct 2003 → Dec 2005
- 9Devon Energy Production Co, L.P.Jan 2006 → Jul 2014
- 10Linn Operating, Inc.Aug 2014 → May 2016
- 11Hilcorp Energy CompanyAug 2018 → Apr 2026
Permits
| Permit | Type | Operator | Received | Issued | Spud | Depth |
|---|---|---|---|---|---|---|
| 325884-98 | Drill | TDC Engineering, Inc. | May 18, 1987 | Jan 27, 1987 | — | 12,000 |
| 325884-99 | Drill | TDC Engineering, Inc. | Jan 27, 1987 | Jan 27, 1987 | — | 12,000 |
Completions
| Completed | Lease | Field | Operator | Status | Depth |
|---|---|---|---|---|---|
| — | — G-4-124165 | — | — | — | — |
| — | — G-4-124166 | — | — | — | — |
Formation tops
As filed on W-2/G-1. Subsea from 804 ft elevation.Download CSV →
| Formation | MD ft | Subsea |
|---|---|---|
| Guerra (10600) | 10,400 | -9,596 |
| Guerra 10600 | 10,400 | -9,596 |
| Guerra (10900) | 11,060 | -10,256 |
| Guerra 10900 | 11,060 | -10,256 |
Perforations
Perforated and open-hole intervals.
| From | To | Type |
|---|---|---|
| 10,404 | 10,421 | Perforated |
| 10,500 | 10,511 | Perforated |
| 11,066 | 11,164 | Perforated |
Casing
Strings as reported, shallowest first.
| Casing in | Set at | Hole in | Cement |
|---|---|---|---|
| 13.375 | 1,550 | 17.5 | 1,045 S |
| 9.625 | 8,200 | 12.25 | 860 S |
| 5.5 | 11,391 | 8.5 | 900 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. About these reports →
| Suffix | Filed | W-2 / G-1 date | Logs referenced |
|---|---|---|---|
| 00 | Aug 17, 1990 | Aug 6, 1990 | — |
| 00 | Jun 9, 1987 | May 20, 1987 | Yes |
| 00 | Jun 4, 1987 | — | — |
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 42-479-34471 → W-2, G-1, plugging reports, as PDFs
- Completion packets for 42-479-34471 → scanned completion filings
Log images are in archives with no per-well link: the RRC's Neubus archive (2004 onward). then paste it into their search.
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/47934471, documented in the API reference.