WELL · 42-479-34520 · DISTRICT 4
Olmitos Ranch #12
Webb County · Vaquillas Ranch (Lobo Cons.) field · Vertical
Olmitos Ranch #12 (API 42-479-34520) is a plugged well in Webb County, plugged February 5, 1999, last operated by Cox Exploration Inc..
The RRC has issued one drilling permit, issued May 13, 1987, permitted to 9,200 ft.
It was permitted by Cox Oil & Gas, Inc. and has since transferred to Cox Exploration Inc. on the wellbore schedule.
Completion filings report 5 formation tops, including Queen City, Wilcox, L. Wilcox, Top Of Lobo.
Operator of record
Permitted by Cox Oil & Gas, Inc.; the EWA schedule now lists a different operator.
Dallas, TX · P-5 Y, filed Jan 7, 2000 · 2 permits on file
SOURCE · RRC EWA WELLBORE SCHEDULE
What each RRC source says
| Wellbore schedule | Cox Exploration Inc. |
| Production reports | Cox Exploration, Inc.through Jun 1998 |
| Latest permit | Cox Oil & Gas, Inc.May 13, 1987 |
The sources disagree, which usually means a transfer or a lease-level production filing by a different entity. Petrora goes with the schedule.
- 9,200
- total depth, ft
- 1
- permits on file
- May 13, 1987
- last permit issued
- Jul 21, 1987
- completed
- 0
- cumulative oil, bbl
- 810K
- cumulative gas, mcf
PRODUCTION FROM PDQ LEASE REPORTS · Jan 1993 THROUGH Feb 1999
Regulatory status · RRC wellbore file
- Schedule
- OFF SCHEDULE
- Completed
- Jul 21, 1987
- Shut in
- —
- Plugged
- Feb 5, 1999
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 |
|---|---|---|---|---|---|---|
| Olmitos Ranch G-4-124907 | Vaquillas Ranch (Lobo Cons.) | Cox Exploration, Inc. | 1 | 0 | 810K | Jan 1993 – Feb 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.
- 1Cox Exploration, Inc.Jan 1993 → Jun 1998
Permits
| Permit | Type | Operator | Received | Issued | Spud | Depth |
|---|---|---|---|---|---|---|
| 330058-99 | Drill | Cox Oil & Gas, Inc. | May 11, 1987 | May 13, 1987 | — | 9,200 |
Completions
| Completed | Lease | Field | Operator | Status | Depth |
|---|---|---|---|---|---|
| — | — G-4-124907 | — | — | — | — |
Formation tops
As filed on W-2/G-1. Subsea from 456 ft elevation.Download CSV →
| Formation | MD ft | Subsea |
|---|---|---|
| Queen City | 3,128 | -2,672 |
| Wilcox | 5,193 | -4,737 |
| L. Wilcox | 6,700 | -6,244 |
| Top of Lobo | 7,940 | -7,484 |
| Lobo 6 | 8,531 | -8,075 |
Perforations
Perforated and open-hole intervals.
| From | To | Type |
|---|---|---|
| 8,576 | 8,589 | Perforated |
| 8,684 | 8,730 | Perforated |
Casing
Strings as reported, shallowest first.
| Casing in | Set at | Hole in | Cement |
|---|---|---|---|
| 10.75 | 713 | 14.75 | 500 S |
| 7.625 | 7,530 | 9.875 | 650 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 | Oct 29, 1987 | Sep 2, 1987 | Yes |
| 00 | Sep 14, 1987 | Aug 20, 1987 | Yes |
| 00 | Sep 5, 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 42-479-34520 → W-2, G-1, plugging reports, as PDFs
- Completion packets for 42-479-34520 → 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/47934520, documented in the API reference.