WELL · 42-131-38355 · DISTRICT 4
Southwest Texas Corp. #236
Duval County · Longhorn South (6400) field · Vertical
Southwest Texas Corp. #236 (API 42-131-38355) is a plugged well in Duval County, plugged October 30, 2023, last operated by Kosarek Charlie.
The RRC has issued 2 drilling permits between 1999 and 2001, permitted to 6,600 ft.
Completion filings report 7 formation tops, including Surface Sds & Sh, Alt. Sd & Sh, Cole, Tdle.
Its 3 leases have reported 34.4K barrels of oil and 56.4K mcf of gas since April 2000, last reporting in December 2023. The leases carry 3 wells, so these are lease totals, not this well alone.
Operator of record
San Antonio, TX · P-5 Y, filed Mar 2, 2007 · 9 permits on file
SOURCE · RRC EWA WELLBORE SCHEDULE
What each RRC source says
| Wellbore schedule | Kosarek Charlie |
| Production reports | Wagner Oil Companythrough Feb 2015 |
| Latest permit | Kosarek, CharlieJan 23, 2001 |
The sources disagree, which usually means a transfer or a lease-level production filing by a different entity. Petrora goes with the schedule.
- 6,600
- total depth, ft
- 2
- permits on file
- Jan 23, 2001
- last permit issued
- Apr 28, 2000
- completed
- 34.4K
- cumulative oil, bbl
- 56.4K
- cumulative gas, mcf
PRODUCTION FROM PDQ LEASE REPORTS · Apr 2000 THROUGH Dec 2023
Regulatory status · RRC wellbore file
- Schedule
- OFF SCHEDULE
- Completed
- Apr 28, 2000
- Shut in
- —
- Plugged
- Oct 30, 2023
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 3 leases 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 Corp O-4-13172 | Longhorn, South | Wagner Oil Company | 1 | 34.4K | 4.02K | Sep 2003 – Dec 2023 |
| Southwest Texas Corp. G-4-180713 | Longhorn, South | Dugger, Glenn | 1 | 0 | 31.6K | Jan 2001 – Jan 2004 |
| Southwest Texas Corp. G-4-177081 | Longhorn, South (6400) | Kosarek, Charlie | 1 | 0 | 20.7K | Apr 2000 – Mar 2001 |
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, CharlieApr 2000 → Nov 2001
- 2Dugger, GlennDec 2001 → Sep 2006
- 3Petrogas Operating CorporationOct 2006 → Feb 2008
- 4Arriola Operating & Consltg Inc.Mar 2008 → May 2011
- 5Wagner Oil CompanyFeb 2015 → Feb 2015
Permits
| Permit | Type | Operator | Received | Issued | Spud | Depth |
|---|---|---|---|---|---|---|
| 504398-99 | Recompletion | Kosarek, Charlie | Jan 22, 2001 | Jan 23, 2001 | Jan 23, 2001 | 6,580 |
| 489839-99 | Drill | Kosarek, Charlie | Nov 24, 1999 | Dec 3, 1999 | Jan 23, 2000 | 6,600 |
Completions
| Completed | Lease | Field | Operator | Status | Depth |
|---|---|---|---|---|---|
| — | — G-4-177081 | — | — | — | — |
| — | — G-4-180713 | — | — | — | — |
| — | — O-4-13172 | — | — | — | — |
Formation tops
As filed on W-2/G-1. Subsea from 400 ft elevation.Download CSV →
| Formation | MD ft | Subsea |
|---|---|---|
| Surface SDS & SH | 1 | 399 |
| Alt. SD & SH | 4,180 | -3,780 |
| Cole | 4,180 | -3,780 |
| Tdle | 4,885 | -4,485 |
| Tedlie | 4,885 | -4,485 |
| Gravis | 5,090 | -4,690 |
| Hiawatha | 5,740 | -5,340 |
Perforations
Perforated and open-hole intervals.
| From | To | Type |
|---|---|---|
| 5,743 | 5,748 | Perforated |
| 6,414 | 6,418 | Perforated |
Casing
Strings as reported, shallowest first.
| Casing in | Set at | Hole in | Cement |
|---|---|---|---|
| 8.625 | 622 | 12.25 | 295 S |
| 4.5 | 6,574 | 7.875 | 510 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 | Nov 7, 2003 | Oct 21, 2003 | — |
| 00 | Oct 21, 2003 | Sep 5, 2003 | — |
| 00 | Oct 7, 2003 | — | — |
| 00 | Apr 25, 2001 | Jan 30, 2001 | Yes |
| 00 | Feb 9, 2001 | — | — |
| 00 | Jun 30, 2000 | May 26, 2000 | Yes |
| 00 | Jun 6, 2000 | — | — |
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 42-131-38355 → W-2, G-1, plugging reports, as PDFs
- Completion packets for 42-131-38355 → 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/13138355, documented in the API reference.