TEXAS · WELLS · ZAPATA COUNTY · SAN MARTIN LEASE · API 42-505-32371 · DISTRICT 04
San Martin #4
Zapata County · Haynes (Middle Wilcox Cons.) field · Vertical
San Martin #4 (API 42-505-32371) is a plugged well in Zapata County, plugged September 26, 2017, last operated by Killam Oil CO. Ltd..
The RRC has issued one drilling permit, issued September 17, 1987, permitted to 12,500 ft.
It was permitted by Killam Oil Company and has since transferred to Killam Oil CO. Ltd. on the wellbore schedule.
Completion filings report one formation top, including Wilcox.
Its lease has reported 10.4K mcf of gas since January 1993, with no volume in the three years through April 2026.
Operator of record
Permitted by Killam Oil Company; the EWA schedule now lists a different operator.
- Based in
- Laredo, TX
- P-5 status
- Active (A)
- P-5 last filed
- Apr 9, 2026
- Permits on file
- 837
- Phone
- (956) 724-7141
SOURCE · RRC EWA WELLBORE SCHEDULE
What each RRC source says
| Wellbore schedule | Killam Oil Co. Ltd. |
| Production reports | Killam Oil Co., Ltd.through Apr 1999 |
| Latest permit | Killam Oil CompanySep 17, 1987 |
The sources disagree, which usually means a transfer or a lease-level production filing by a different entity. Petrora goes with the schedule.
- 12,500
- total depth, ft
- 1
- permits on file
- Sep 17, 1987
- last permit issued
- Jun 20, 1989
- completed
- 0
- cumulative oil, bbl
- 10.4K
- cumulative gas, mcf
PRODUCTION FROM PDQ LEASE REPORTS · Jan 1993 THROUGH Apr 1999
Regulatory status · RRC wellbore file
- Schedule
- OFF SCHEDULE
- Completed
- Jun 20, 1989
- Shut in
- —
- Plugged
- Sep 26, 2017
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 Martin G-4-126167 | Haynes (Middle Wilcox Cons.) | Killam Oil Co., Ltd. | 1 | 0 | 10.4K | Jan 1993 – Apr 1999 |
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.
- 1Killam Oil CompanyJan 1993 → Mar 1994
- 2Killam Oil Co., Ltd.Jul 1994 → Apr 1999
Permits
| Permit | Type | Operator | Received | Issued | Spud | Depth |
|---|---|---|---|---|---|---|
| 335972-99 | Drill | Killam Oil Company | Sep 15, 1987 | Sep 17, 1987 | — | 12,500 |
Completions
| Completed | Lease | Field | Operator | Status | Depth |
|---|---|---|---|---|---|
| Jun 20, 1989 | San Martin G-4-126167 | Haynes (Middle Wilcox Cons.) | Killam Oil Co. Ltd. | Plugged | — |
Formation tops
As filed on W-2/G-1. Subsea from 387 ft elevation.Download CSV →
| Formation | MD ft | Subsea |
|---|---|---|
| Wilcox | 10,950 | -10,563 |
Perforations
Perforated and open-hole intervals.
| From | To | Type |
|---|---|---|
| 10,631 | 10,642 | Perforated |
| 10,649 | 10,656 | Perforated |
| 10,982 | 11,048 | Perforated |
Casing
Strings as reported, shallowest first.
| Casing in | Set at | Hole in | Cement |
|---|---|---|---|
| 13.375 | 934 | 17.5 | 710 S |
| 9.625 | 5,804 | 12.25 | 640 S |
| 7 | 9,700 | 8.5 | 340 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 | Aug 28, 1989 | Jul 27, 1989 | Yes |
| 00 | Feb 17, 1988 | Jan 15, 1988 | Yes |
| 00 | Feb 3, 1988 | — | — |
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 42-505-32371 → W-2, G-1, plugging reports, as PDFs
- Completion packets for 42-505-32371 → scanned completion filings
Log images filed since 2004 open from the RRC's log search for this well; none are loaded here 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/50532371, documented in the API reference.