WELL · 42-419-31183 · DISTRICT 6
Casto Unit #1
Shelby County · Tenaha SW. (Travis Peak) field · Vertical
Casto Unit #1 (API 42-419-31183) is a plugged well in Shelby County, plugged June 10, 2011, last operated by Tanos Exploration LLC.
The RRC has issued one drilling permit, issued August 10, 2007, permitted to 9,700 ft.
It was permitted by Riverstone Energy Operating, LLC and has since transferred to Tanos Exploration LLC on the wellbore schedule.
Completion filings report 7 formation tops, including Glen Rose, BMA, James Lime, Pettit.
Operator of record
Permitted by Riverstone Energy Operating, LLC; the EWA schedule now lists a different operator.
Houston, TX · P-5 Y, filed Aug 4, 2025 · 35 permits on file · (855) 275-7017
SOURCE · RRC EWA WELLBORE SCHEDULE
What each RRC source says
| Wellbore schedule | Tanos Exploration LLC |
| Production reports | Tanos Exploration, LLCthrough Feb 2011 |
| Latest permit | Riverstone Energy Operating, LLCAug 10, 2007 |
The sources disagree, which usually means a transfer or a lease-level production filing by a different entity. Petrora goes with the schedule.
- 9,700
- total depth, ft
- 1
- permits on file
- Aug 10, 2007
- last permit issued
- Dec 5, 2008
- completed
- 0
- cumulative oil, bbl
- 54.1K
- cumulative gas, mcf
PRODUCTION FROM PDQ LEASE REPORTS · Oct 2007 THROUGH Jun 2011
Regulatory status · RRC wellbore file
- Schedule
- OFF SCHEDULE
- Completed
- Dec 5, 2008
- Shut in
- —
- Plugged
- Jun 10, 2011
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 2 leases this well is completed on; they carry 2 wells in total, so volumes are shared.Why →
| Lease | Field | Reporting operator | Wells | Oil, bbl | Gas, mcf | Reported |
|---|---|---|---|---|---|---|
| Casto Unit G-6-247293 | Tenaha, SW. (Travis Peak) | Tanos Exploration, LLC | 1 | 0 | 54.1K | Dec 2008 – Jun 2011 |
| Casto Unit G-6-239027 | Wildcat | Riverstone Energy Operating, LLC | 1 | 0 | 0 | Oct 2007 – Dec 2008 |
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.
- 1Riverstone Energy Operating, LLCDec 2008 → Apr 2010
- 2Tanos Exploration, LLCFeb 2011 → Feb 2011
Permits
| Permit | Type | Operator | Received | Issued | Spud | Depth |
|---|---|---|---|---|---|---|
| 643892-99 | Drill | Riverstone Energy Operating, LLC | Aug 6, 2007 | Aug 10, 2007 | Sep 28, 2007 | 9,700 |
Completions
| Completed | Lease | Field | Operator | Status | Depth |
|---|---|---|---|---|---|
| — | — G-6-239027 | — | — | — | — |
| — | — G-6-247293 | — | — | — | — |
Formation tops
As filed on W-2/G-1. Subsea from 285 ft elevation.Download CSV →
| Formation | MD ft | Subsea |
|---|---|---|
| Glen Rose | 3,600 | -3,315 |
| BMA | 5,317 | -5,032 |
| James LimeJAMES LM | 5,835 | -5,550 |
| PettitPETTET LM | 6,117 | -5,832 |
| PettitPETTIT LM | 6,117 | -5,832 |
| Travis Peak | 6,548 | -6,263 |
| T/CV "B" LM | 8,815 | -8,530 |
| T/CV B LM | 8,815 | -8,530 |
Perforations
Perforated and open-hole intervals.
| From | To | Type |
|---|---|---|
| 6,838 | 6,850 | Perforated |
Casing
Strings as reported, shallowest first.
| Casing in | Set at | Hole in | Cement |
|---|---|---|---|
| 9.625 | 1,060 | 8.75 | 386 S |
| 4.5 | 9,738 | 8.75 | 1,585 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 | Jun 22, 2009 | Apr 10, 2009 | Yes |
| 00 | May 26, 2009 | — | — |
| 00 | Oct 3, 2008 | Aug 19, 2008 | Yes |
| 00 | Sep 17, 2008 | — | — |
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 42-419-31183 → W-2, G-1, plugging reports, as PDFs
- Completion packets for 42-419-31183 → 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/41931183, documented in the API reference.