WELL · 42-505-31120 · DISTRICT 4
San Fernando Minerals #1
Zapata County · Big Mac (Lobo 7870) field · Vertical
San Fernando Minerals #1 (API 42-505-31120) is a plugged well in Zapata County, plugged July 27, 1994, last operated by Sanchez-O Brien Oil & Gas Corp..
The RRC has issued one drilling permit, issued August 13, 1979, permitted to 11,000 ft.
Operator of record
Sanchez-O Brien Oil & Gas Corp.
- Based in
- Houston, TX
- P-5 status
- Inactive (I)
- P-5 last filed
- Aug 14, 1997
- Permits on file
- 493
- Phone
- (713) 783-8000
SOURCE · RRC EWA WELLBORE SCHEDULE
What each RRC source says
| Wellbore schedule | Sanchez-O Brien Oil & Gas Corp. |
| Production reports | none |
| Latest permit | Sanchez-O'Brien Oil & Gas Corp.Aug 13, 1979 |
- 11,000
- total depth, ft
- 1
- permits on file
- Aug 13, 1979
- last permit issued
- Nov 8, 1979
- completed
- 0
- cumulative oil, bbl
- 0
- cumulative gas, mcf
PRODUCTION FROM PDQ LEASE REPORTS · Jan 1993 THROUGH Jul 1994
Regulatory status · RRC wellbore file
- Schedule
- OFF SCHEDULE
- Completed
- Nov 8, 1979
- Shut in
- —
- Plugged
- Jul 27, 1994
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; this well is the only one on it.Why →
| Lease | Field | Reporting operator | Wells | Oil, bbl | Gas, mcf | Reported |
|---|---|---|---|---|---|---|
| San Fernando Minerals G-4-86396 | Big Mac (Lobo 7870) | Sanchez-O'Brien Oil & Gas Corp. | 1 | 0 | 0 | Jan 1993 – Jul 1994 |
No volumes reported on these leases in the last three years.
Permits
| Permit | Type | Operator | Received | Issued | Spud | Depth |
|---|---|---|---|---|---|---|
| 55405-99 | Drill | Sanchez-O'Brien Oil & Gas Corp. | Aug 13, 1979 | Aug 13, 1979 | Aug 26, 1979 | 11,000 |
Completions
| Completed | Lease | Field | Operator | Status | Depth |
|---|---|---|---|---|---|
| Nov 8, 1979 | San Fernando Minerals G-4-86396 | Big Mac (Lobo 7870) | Sanchez-O Brien Oil & Gas Corp. | Plugged | — |
Perforations
Perforated and open-hole intervals.
| From | To | Type |
|---|---|---|
| 7,872 | 8,090 | Perforated |
Casing
Strings as reported, shallowest first.
| Casing in | Set at | Hole in | Cement |
|---|---|---|---|
| 10.75 | 1,012 | 14.75 | 600 S |
| 2.875 | 5,854 | — | — |
| 7.625 | 6,154 | 9.875 | 400 S |
| 2.375 | 7,790 | — | — |
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 | Jan 12, 1984 | Feb 7, 1980 | — |
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 42-505-31120 → W-2, G-1, plugging reports, as PDFs
- Completion packets for 42-505-31120 → 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/50531120, documented in the API reference.