WELL · 42-131-09439 · DISTRICT 4
Southwest Texas Corporation #21
Duval County · Longhorn South (Hockley) field · Vertical
Southwest Texas Corporation #21 (API 42-131-09439) is a plugged well in Duval County, plugged July 13, 2016, last operated by Wagner Oil Company.
The RRC has issued 2 drilling permits between 1979 and 1985, permitted to 5,840 ft.
It was permitted by Martin, Glen A. and has since transferred to Wagner Oil Company on the wellbore schedule.
Its lease has reported 11.4K barrels of oil and 124 mcf of gas since January 1993, last reporting in July 2016. The lease carries 3 wells, so these are lease totals, not this well alone.
Operator of record
Permitted by Martin, Glen A.; the EWA schedule now lists a different operator.
Fort Worth, TX · P-5 Y, filed Sep 4, 2025 · 278 permits on file · (800) 457-5332
SOURCE · RRC EWA WELLBORE SCHEDULE
What each RRC source says
| Wellbore schedule | Wagner Oil Company |
| Production reports | Arriola Operating & Consltg Inc.through Jun 2011 |
| Latest permit | Martin, Glen A.Mar 29, 1985 |
The sources disagree, which usually means a transfer or a lease-level production filing by a different entity. Petrora goes with the schedule.
- 5,840
- total depth, ft
- 2
- permits on file
- Mar 29, 1985
- last permit issued
- Mar 3, 1979
- completed
- 11.4K
- cumulative oil, bbl
- 124
- cumulative gas, mcf
PRODUCTION FROM PDQ LEASE REPORTS · Jan 1993 THROUGH Jul 2016
Regulatory status · RRC wellbore file
- Schedule
- OFF SCHEDULE
- Completed
- Mar 3, 1979
- Shut in
- —
- Plugged
- Jul 13, 2016
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; they carry 3 wells in total, so volumes are shared.Why →
| Lease | Field | Reporting operator | Wells | Oil, bbl | Gas, mcf | Reported |
|---|---|---|---|---|---|---|
| Southwest Texas Corporation O-4-1625 | Longhorn, South | Wagner Oil Company | 3 | 11.4K | 124 | Jan 1993 – Jul 2016 |
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.
- 1Kosarek, CharlieMay 1996 → Sep 2006
- 2Petrogas Operating CorporationOct 2006 → Feb 2008
- 3Arriola Operating & Consltg Inc.Mar 2008 → Jun 2011
Permits
| Permit | Type | Operator | Received | Issued | Spud | Depth |
|---|---|---|---|---|---|---|
| 272252-99 | Recompletion | Martin, Glen A. | Mar 29, 1985 | Mar 29, 1985 | — | 5,840 |
| 44134-99 | Other | Martin, Glen A. | Feb 28, 1979 | Feb 28, 1979 | — | 5,840 |
Completions
| Completed | Lease | Field | Operator | Status | Depth |
|---|---|---|---|---|---|
| — | — O-4-1625 | — | — | — | — |
Perforations
Perforated and open-hole intervals.
| From | To | Type |
|---|---|---|
| 4,285 | 4,290 | Perforated |
| 5,782 | 5,786 | Perforated |
Casing
Strings as reported, shallowest first.
| Casing in | Set at | Hole in | Cement |
|---|---|---|---|
| 10.75 | 320 | 15 | 250 S |
| 2.375 | 4,258 | — | — |
| 5.5 | 5,839 | 8.625 | 600 S |
| 5.5 | 5,839 | 8.75 | — |
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 | May 22, 1985 | May 10, 1985 | — |
| 00 | May 16, 1985 | — | — |
| 00 | Jan 12, 1984 | Mar 7, 1979 | — |
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 42-131-09439 → W-2, G-1, plugging reports, as PDFs
- Completion packets for 42-131-09439 → 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/13109439, documented in the API reference.