WELL · 42-391-01586 · DISTRICT 2
Oconnor Thomas -A- #C108
Refugio County · Tom Oconnor (5900 Sand) field · Vertical
Oconnor Thomas -A- #C108 (API 42-391-01586) is a well in Refugio County operated by T-C Oil Company LLC, completed November 28, 1974.
The RRC has issued 2 drilling permits between 1998 and 2011, permitted to 5,915 ft.
It was permitted by Hilcorp Energy Company and has since transferred to T-C Oil Company LLC on the wellbore schedule.
Completion filings report one formation top, including Frio.
Its 3 leases have reported 22.8M barrels of oil and 15.4M mcf of gas since January 1993, last reporting in July 2026. The leases carry 598 wells, so these are lease totals, not this well alone.
Operator of record
Permitted by Hilcorp Energy Company; the EWA schedule now lists a different operator.
Refugio, TX · P-5 Y, filed Oct 4, 2025 · 287 permits on file · (361) 646-9296
SOURCE · RRC EWA WELLBORE SCHEDULE
What each RRC source says
| Wellbore schedule | T-C Oil Company LLC |
| Production reports | Hilcorp Energy Companythrough Apr 2026 |
| Latest permit | Hilcorp Energy CompanyJun 3, 2011 |
The sources disagree, which usually means a transfer or a lease-level production filing by a different entity. Petrora goes with the schedule.
- 5,915
- total depth, ft
- 2
- permits on file
- Jun 3, 2011
- last permit issued
- Nov 28, 1974
- completed
- 22.8M
- cumulative oil, bbl
- 15.4M
- cumulative gas, mcf
PRODUCTION FROM PDQ LEASE REPORTS · Jan 1993 THROUGH Jul 2026
Regulatory status · RRC wellbore file
- Schedule
- OFF SCHEDULE
- Completed
- Nov 28, 1974
- Shut in
- —
- Plugged
- —
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 598 wells in total, so volumes are shared.Why →
| Lease | Field | Reporting operator | Wells | Oil, bbl | Gas, mcf | Reported |
|---|---|---|---|---|---|---|
| Oconnor, Thomas, -A- O-2-2864 | Tom Oconnor (5900 Sand) | T-C Oil Company, LLC | 3 | 12.5K | 47.9K | Jan 1993 – Jul 2026 |
| Tom Oconnor (5800 SD) Fld. Unit O-2-5280 | Tom Oconnor (5800) | Hilcorp Energy Company | 594 | 22.8M | 14.9M | Jan 1993 – Jul 2026 |
| Copano Gas Unit G-2-167860 | Tom Oconnor (4200) | T - C Oil Company | 1 | 0 | 394K | Mar 1998 – Oct 2011 |
Oil, barrels lease total
Last 12 months 673,200 · prior 12 524,408(+28%)
Gas, mcf lease total
Last 12 months 117,526 · prior 12 83,712(+40%)
Chain of custody
Every operator that reported production on this well's lease, in order.
- 1Copano CompanyJan 1993 → Jun 1998
- 2Quintana Pet. Corp.Jan 1993 → Nov 2000
- 3Copano Gas UnitMar 1998 → Jun 2004
- 4Hilcorp Energy CompanyDec 2000 → Apr 2026
- 5T - C Oil CompanyJul 2004 → Mar 2008
Permits
| Permit | Type | Operator | Received | Issued | Spud | Depth |
|---|---|---|---|---|---|---|
| 717530-99 | Recompletion | Hilcorp Energy Company | Jun 1, 2011 | Jun 3, 2011 | Aug 30, 2011 | 5,915 |
| 473686-99 | Recompletion | Copano Gas Unit | Feb 23, 1998 | Feb 27, 1998 | Jan 28, 1998 | 4,893 |
Completions
| Completed | Lease | Field | Operator | Status | Depth |
|---|---|---|---|---|---|
| — | — G-2-167860 | — | — | — | — |
| — | — O-2-2864 | — | — | — | — |
| — | — O-2-5280 | — | — | — | — |
Formation tops
As filed on W-2/G-1. Subsea from 48 ft elevation.Download CSV →
| Formation | MD ft | Subsea |
|---|---|---|
| Frio | 5,915 | -5,867 |
Perforations
Perforated and open-hole intervals.
| From | To | Type |
|---|---|---|
| 4,170 | 4,174 | Perforated |
| 5,774 | 5,782 | Perforated |
| 5,809 | 5,814 | Perforated |
| 5,821 | 5,826 | Perforated |
| 5,890 | 5,901 | Perforated |
| — | 5,401 | Perforated |
| — | 5,534 | Perforated |
Casing
Strings as reported, shallowest first.
| Casing in | Set at | Hole in | Cement |
|---|---|---|---|
| 10.75 | 1,129 | 16 | 528 S |
| 5 | 5,905 | 9 | 528 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 | Sep 10, 2012 | Nov 21, 2011 | Yes |
| 00 | Aug 4, 1998 | Mar 26, 1998 | Yes |
| 00 | May 8, 1998 | — | — |
| 00 | Jan 12, 1984 | Dec 9, 1974 | — |
| 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 42-391-01586 → W-2, G-1, plugging reports, as PDFs
- Completion packets for 42-391-01586 → 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/39101586, documented in the API reference.