WELL · 42-391-31813 · DISTRICT 2
Oconnor Dennis Etal -L- #L 59
Refugio County · Lake Pasture (H-440 Sand) field · Vertical
Oconnor Dennis Etal -L- #L 59 (API 42-391-31813) is a well in Refugio County operated by T-C Oil Company LLC, completed November 16, 1984.
The RRC has issued 3 drilling permits between 1984 and 2021, permitted to 4,650 ft.
Completion filings report 5 formation tops, including Lagarto, Miocene (undifferentiated), Eocene, Catahoula.
Its 2 leases have reported 3.49M barrels of oil and 48.5M mcf of gas since January 1993, last reporting in July 2026. The leases carry 82 wells, so these are lease totals, not this well alone.
Operator of record
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 | T-C Oil Company, LLCthrough Apr 2026 |
| Latest permit | T-C Oil Company, LLCFeb 4, 2021 |
- 4,650
- total depth, ft
- 3
- permits on file
- Feb 4, 2021
- last permit issued
- Nov 16, 1984
- completed
- 3.49M
- cumulative oil, bbl
- 48.5M
- cumulative gas, mcf
PRODUCTION FROM PDQ LEASE REPORTS · Jan 1993 THROUGH Jul 2026
Regulatory status · RRC wellbore file
- Schedule
- OFF SCHEDULE
- Completed
- Nov 16, 1984
- Shut in
- —
- Plugged
- —
Surface location
28.407330, -97.058494
OpenStreetMap → · Google Maps →
Permit surface location from the RRC GIS record, in Refugio County.
Lease production
PDQ LEASE REPORTS · REPORTED THROUGH APR 2026
Texas reports oil by lease, not by well. These are the 2 leases this well is completed on; they carry 82 wells in total, so volumes are shared.Why →
| Lease | Field | Reporting operator | Wells | Oil, bbl | Gas, mcf | Reported |
|---|---|---|---|---|---|---|
| Oconnor, Dennis, Etal -L- O-2-2845 | Lake Pasture (H-440 Sand) | T-C Oil Company, LLC | 81 | 3.49M | 48.5M | Jan 1993 – Jul 2026 |
| O'Connor, Dennis et al -L- G-2-225472 | Lake Pasture (H-434) | T-C Oil Company, LLC | 1 | 0 | 0 | Feb 2007 – Feb 2021 |
Oil, barrels lease total
Last 12 months 23,596 · prior 12 25,451(-7%)
Gas, mcf lease total
Last 12 months 19,406 · prior 12 24,005(-19%)
Chain of custody
Every operator that reported production on this well's lease, in order.
- 1T - C Oil CompanyJan 1993 → Dec 2011
- 2T-C Oil Company, LLCJan 2012 → Apr 2026
Permits
| Permit | Type | Operator | Received | Issued | Spud | Depth |
|---|---|---|---|---|---|---|
| 867441-99 | Recompletion | T-C Oil Company, LLC | Feb 1, 2021 | Feb 4, 2021 | Jan 29, 2021 | 4,525 |
| 631901-99 | Recompletion | T - C Oil Company | Jan 12, 2007 | Jan 19, 2007 | Jan 12, 2007 | 4,500 |
| 255300-99 | Drill | T - C Oil Company | Oct 18, 1984 | Oct 22, 1984 | Nov 1, 1984 | 4,650 |
Completions
| Completed | Lease | Field | Operator | Status | Depth |
|---|---|---|---|---|---|
| — | — G-2-225472 | — | — | — | — |
| — | — O-2-2845 | — | — | — | — |
| — | — O-2-2845 | — | — | — | — |
Formation tops
As filed on W-2/G-1. Subsea from 51 ft elevation.Download CSV →
| Formation | MD ft | Subsea |
|---|---|---|
| Lagarto | 1 | 50 |
| LagartoLARGARTO | 1 | 50 |
| Miocene (undifferentiated)MIOCENE | 2,221 | -2,170 |
| Eocene | 2,630 | -2,579 |
| Miocene (undifferentiated)MIOCENE | 3,010 | -2,959 |
| Catahoula | 3,650 | -3,599 |
| Catahoula | 3,710 | -3,659 |
| Greta | 4,370 | -4,319 |
| Greta | 4,385 | -4,334 |
| Lagarto | — | — |
Perforations
Perforated and open-hole intervals.
| From | To | Type |
|---|---|---|
| 4,392 | 4,402 | Perforated |
| 4,408 | 4,414 | Perforated |
| 4,419 | 4,424 | Perforated |
| 4,446 | 4,454 | Perforated |
| 4,472 | 4,476 | Perforated |
| 4,505 | 4,510 | Perforated |
Casing
Strings as reported, shallowest first.
| Casing in | Set at | Hole in | Cement |
|---|---|---|---|
| 9.625 | 1,511 | 13.5 | 700 S |
| 5.5 | 4,609 | 8.75 | 873 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 | Aug 19, 2021 | Jul 23, 2021 | — |
| 00 | Mar 11, 2021 | Mar 3, 2021 | — |
| 00 | May 23, 2007 | Feb 20, 2007 | Yes |
| 00 | Mar 23, 2007 | — | — |
| 00 | Jan 22, 1985 | Dec 4, 1984 | — |
| 00 | Jan 5, 1985 | — | — |
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 42-391-31813 → W-2, G-1, plugging reports, as PDFs
- Completion packets for 42-391-31813 → 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.
Nearby wells and their tops
NEAREST 8 LOCATED WELLS WITH TOPS · WITHIN 16 KM
Draw a cross-section
This well's tops beside its 5 nearest neighbours, subsea-aligned so they line up regardless of surface terrain.
O'Connor, Dennis et al -L-42-391-31811
0.2 KM · T-C Oil Company, LLC · Section with this well →
| Lagarto | 1 | 51 |
| Miocene (undifferentiated) | 2,230 | -2,178 |
| Eocene | 2,410 | -2,358 |
| Catahoula | 3,590 | -3,538 |
| Greta | 4,375 | -4,323 |
| Lagarto | — |
O'Connor, Dennis et al -L-42-391-31665
0.3 KM · T-C Oil Company, LLC · Section with this well →
| Lagarto | 1 | 51 |
| Eocene | 2,240 | -2,188 |
| Miocene (undifferentiated) | 2,240 | -2,188 |
| Catahoula | 3,600 | -3,548 |
| Cathoula | 3,600 | -3,548 |
| Greta | 4,385 | -4,333 |
Dennis O'Connor et al -L-42-391-33300
0.4 KM · T-C Oil Company, LLC · Section with this well →
| Miocene (undifferentiated) | 2,375 | -2,326 |
| Catahoula | 3,640 | -3,591 |
| Greta | 4,390 | -4,341 |
| Jackson | — | |
| Frio | — |
Dennis O'Connor et al -L-42-391-33290
0.5 KM · T-C Oil Company, LLC · Section with this well →
| Jackson | 2,890 | -2,830 |
| Catahoula | 3,640 | -3,580 |
| Greta | 4,400 | -4,340 |
| Frio | — |
Williams, Maude Etal -A-42-391-30423
0.7 KM · Hilcorp Energy Company · Section with this well →
| Lagarto | 1,500 | -1,446 |
| Oakville | 2,750 | -2,696 |
| Catahoula | 3,300 | -3,246 |
| Catahoula | 3,593 | -3,539 |
| Anahuac | 4,100 | -4,046 |
| Frio | 4,365 | -4,311 |
| Frio | 4,375 | -4,321 |
| Frio | 5,000 | -4,946 |
11 TOPS · FIRST 8
Williams, Maude Etal -A-42-391-32037
0.7 KM · Quintana Pet. Corp. · Section with this well →
| Lagarto | 1,500 | -1,448 |
| Lagarto | 1,500 | -1,448 |
| Oakville | 2,750 | -2,698 |
| Catahoula | 3,300 | -3,248 |
| Catahoula | 3,662 | -3,610 |
| Anahuac | 4,100 | -4,048 |
| Frio | 4,353 | -4,301 |
| Frio | 4,365 | -4,313 |
11 TOPS · FIRST 8
O'Connor, Dennis et al -L-42-391-32542
0.8 KM · T-C Oil Company, LLC · Section with this well →
| Lagarto | 1 | 49 |
| Miocene (undifferentiated) | 2,055 | -2,005 |
| Catahoula | 3,604 | -3,554 |
| Greta | 4,408 | -4,358 |
Dennis O'Connor et al -L-42-391-33296
0.8 KM · T-C Oil Company, LLC · Section with this well →
| Miocene (undifferentiated) | 2,400 | -2,351 |
| Catahoula | 3,720 | -3,671 |
| Greta | 4,390 | -4,341 |
| Frio | — | |
| Jackson | — |
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/39131813, documented in the API reference.