WELL · 42-391-00257 · DISTRICT 2
Oconnor #40
Refugio County · T-C (5600) field · Vertical
Oconnor #40 (API 42-391-00257) is a plugged well in Refugio County, plugged December 15, 2010, last operated by T-C Oil Company LLC.
The RRC has issued 3 drilling permits between 2002 and 2008, permitted to 5,668 ft.
It was permitted by T - C Oil Company and has since transferred to T-C Oil Company LLC on the wellbore schedule.
Completion filings report 5 formation tops, including Lagarto, Miocene (undifferentiated), Catahoula, Greta.
Its 3 leases have reported 52K barrels of oil and 203K mcf of gas since January 1993, last reporting in July 2026. The leases carry 21 wells, so these are lease totals, not this well alone.
Operator of record
Permitted by T - C Oil Company; the EWA schedule now lists a different operator.
- Based in
- Refugio, TX
- P-5 status
- Active (A)
- P-5 last filed
- Dec 3, 2025
- Permits on file
- 287
- Phone
- (361) 526-4693
SOURCE · RRC EWA WELLBORE SCHEDULE
What each RRC source says
| Wellbore schedule | T-C Oil Company LLC |
| Production reports | T - C Oil Companythrough Jul 2008 |
| Latest permit | T - C Oil CompanySep 17, 2008 |
The sources disagree, which usually means a transfer or a lease-level production filing by a different entity. Petrora goes with the schedule.
- 5,668
- total depth, ft
- 3
- permits on file
- Sep 17, 2008
- last permit issued
- Aug 26, 2005
- completed
- 52K
- cumulative oil, bbl
- 203K
- cumulative gas, mcf
PRODUCTION FROM PDQ LEASE REPORTS · Jan 1993 THROUGH Jul 2026
Regulatory status · RRC wellbore file
- Schedule
- OFF SCHEDULE
- Completed
- Aug 26, 2005
- Shut in
- —
- Plugged
- Dec 15, 2010
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 21 wells in total, so volumes are shared.Why →
| Lease | Field | Reporting operator | Wells | Oil, bbl | Gas, mcf | Reported |
|---|---|---|---|---|---|---|
| Oconnor O-2-1503 | T-C (5600) | T-C Oil Company, LLC | 19 | 52K | 203K | Jan 1993 – Jul 2026 |
| O'Connor G-2-239410 | Huff (2800) | T - C Oil Company | 1 | 0 | 0 | Aug 2008 – Dec 2010 |
| O'Connor G-2-189460 | Huff (4770) | T - C Oil Company | 1 | 0 | 0 | Mar 2002 – Aug 2005 |
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.
- 1T - C Oil CompanyJan 1993 → Jul 2008
Permits
| Permit | Type | Operator | Received | Issued | Spud | Depth |
|---|---|---|---|---|---|---|
| 670163-99 | Recompletion | T - C Oil Company | Aug 29, 2008 | Sep 17, 2008 | Aug 12, 2008 | 4,821 |
| 605385-99 | Recompletion | T - C Oil Company | Aug 24, 2005 | Aug 24, 2005 | Aug 5, 2005 | 5,668 |
| 518205-99 | Recompletion | T - C Oil Company | Mar 11, 2002 | Mar 14, 2002 | Mar 8, 2002 | 5,625 |
Completions
| Completed | Lease | Field | Operator | Status | Depth |
|---|---|---|---|---|---|
| — | — G-2-189460 | — | — | — | — |
| — | — G-2-239410 | — | — | — | — |
| — | — O-2-1503 | — | — | — | — |
| — | — O-2-1503 | — | — | — | — |
Formation tops
As filed on W-2/G-1. Subsea from 66 ft elevation.Download CSV →
| Formation | MD ft | Subsea |
|---|---|---|
| Lagarto | 1 | 65 |
| Miocene (undifferentiated)MIOCENE | 2,073 | -2,007 |
| Catahoula | 3,816 | -3,750 |
| Greta | 4,483 | -4,417 |
| Frio | 4,860 | -4,794 |
Perforations
Perforated and open-hole intervals.
| From | To | Type |
|---|---|---|
| 2,841 | 2,846 | Perforated |
| 4,975 | 4,980 | Perforated |
| 5,644 | 5,650 | Perforated |
| — | 5,644 | Perforated |
Casing
Strings as reported, shallowest first.
| Casing in | Set at | Hole in | Cement |
|---|---|---|---|
| 8.625 | 1,229 | 13.75 | 480 S |
| 4.5 | 5,784 | 7.875 | 750 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 13, 2008 | Sep 3, 2008 | Yes |
| 00 | Oct 2, 2008 | — | — |
| 00 | Mar 27, 2006 | Sep 2, 2005 | Yes |
| 00 | Dec 1, 2005 | — | — |
| 00 | Mar 13, 2003 | Apr 22, 2002 | Yes |
| 00 | Jul 25, 2002 | — | — |
| 00 | Jan 12, 1984 | — | — |
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 42-391-00257 → W-2, G-1, plugging reports, as PDFs
- Completion packets for 42-391-00257 → 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/39100257, documented in the API reference.