WELL · 42-479-35022 · DISTRICT 4
Hereford L.M. #40
Webb County · Wildcat field · Directional · Sidetrack
Hereford L.M. #40 (API 42-479-35022) is a well in Webb County operated by Sanchez-O Brien Oil & Gas Corp., completed June 1, 1990.
The RRC has issued 2 drilling permits (amended once) between 1990 and 1992, permitted to 9,000 ft.
Completion filings report 3 formation tops, including Carrizo, Lower Wx, Lobo.
No lease production has been reported under this well’s leases.
Operator of record
Sanchez-O Brien Oil & Gas Corp.
Houston, TX · P-5 Y, filed Jul 6, 1998 · 493 permits on file
SOURCE · RRC EWA WELLBORE SCHEDULE
What each RRC source says
| Wellbore schedule | Sanchez-O Brien Oil & Gas Corp. |
| Production reports | Plains Exploration & Prod. Co.through Nov 2011 |
| Latest permit | Sanchez-O'Brien Oil & Gas Corp.Jul 8, 1992 |
The sources disagree, which usually means a transfer or a lease-level production filing by a different entity. Petrora goes with the schedule.
- 9,000
- total depth, ft
- 3
- permits on file
- Jul 8, 1992
- last permit issued
- Jun 1, 1990
- completed
- 0
- cumulative oil, bbl
- 315K
- cumulative gas, mcf
PRODUCTION FROM PDQ LEASE REPORTS · Jan 1993 THROUGH Jul 2026
Regulatory status · RRC wellbore file
- Schedule
- OFF SCHEDULE
- Completed
- Jun 1, 1990
- 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 |
|---|---|---|---|---|---|---|
| Hereford, L.M. G-4-142632 | Bashara-Hereford (7300) | Merit Energy Company | 1 | 0 | 315K | Jan 1993 – Jul 2026 |
| — G-4-134541 | — | — | 0 | 0 | 0 | — |
No volumes reported on these leases in the last three years.
Chain of custody
Every operator that reported production on this well's lease, in order.
- 1Sanchez-O'Brien Oil & Gas Corp.Jan 1993 → Dec 1994
- 2North Central Oil Corp.Jan 1995 → Dec 2005
- 3Pogo Producing CompanyJan 2006 → Jan 2008
- 4Pogo Producing Company LLCFeb 2008 → Aug 2011
- 5Plains Exploration & Prod. Co.Sep 2011 → Nov 2011
Permits
| Permit | Type | Operator | Received | Issued | Spud | Depth |
|---|---|---|---|---|---|---|
| 400997-99 | Recompletion · sidetrack | Sanchez-O'Brien Oil & Gas Corp. | Jul 8, 1992 | Jul 8, 1992 | Jul 14, 1992 | 9,000 |
| 371936-98 | Recompletion · sidetrack | Sanchez-O'Brien Oil & Gas Corp. | May 1, 1990 | Apr 6, 1990 | — | 8,200 |
| 371936-99 | Drill | Sanchez-O'Brien Oil & Gas Corp. | Apr 6, 1990 | Apr 6, 1990 | — | 9,000 |
Completions
| Completed | Lease | Field | Operator | Status | Depth |
|---|---|---|---|---|---|
| — | — G-4-134541 | — | — | — | — |
| — | — G-4-142632 | — | — | — | — |
Formation tops
As filed on W-2/G-1. Subsea from 525 ft elevation.Download CSV →
| Formation | MD ft | Subsea |
|---|---|---|
| CarrizoCARRIZO WX | 3,490 | -2,965 |
| Lower WX | 5,520 | -4,995 |
| Lobo | 7,130 | -6,605 |
Perforations
Perforated and open-hole intervals.
| From | To | Type |
|---|---|---|
| 7,716 | 7,752 | Perforated |
Casing
Strings as reported, shallowest first.
| Casing in | Set at | Hole in | Cement |
|---|---|---|---|
| 9.875 | 873 | 12.25 | — |
| 9.875 | 874 | 12.25 | — |
| 7 | 6,000 | 8.75 | — |
| 4.5 | 8,252 | 6.125 | 280 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 | Dec 14, 1992 | Sep 17, 1992 | — |
| 00 | Oct 29, 1992 | — | — |
| 00 | Aug 16, 1990 | Jul 24, 1990 | Yes |
| 00 | Aug 9, 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 42-479-35022 → W-2, G-1, plugging reports, as PDFs
- Completion packets for 42-479-35022 → 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/47935022, documented in the API reference.