WELL · 42-489-31141 · DISTRICT 4
Thomas Unit #1
Willacy County · Riggan (F-20) field · Vertical
Thomas Unit #1 (API 42-489-31141) is a well in Willacy County operated by Dewbre Petroleum Corporation, completed August 22, 2018.
The RRC has issued 2 drilling permits between 2006 and 2021, permitted to 12,300 ft.
Completion filings report 3 formation tops, including Miocene (undifferentiated), Catahoula, Frio.
No lease production has been reported under this well’s leases.
It holds an active disposal or injection permit, with 238 barrels injected in the 12 months reported through January 2026.
Operator of record
Corpus Christ, TX · P-5 Y, filed Sep 4, 2025 · 366 permits on file · (361) 888-7978
SOURCE · RRC EWA WELLBORE SCHEDULE
What each RRC source says
| Wellbore schedule | Dewbre Petroleum Corporation |
| Production reports | Dewbre Petroleum Corporationthrough Mar 2023 |
| Latest permit | Dewbre Petroleum CorporationJul 14, 2021 |
- 12,300
- total depth, ft
- 2
- permits on file
- Jul 14, 2021
- last permit issued
- Aug 22, 2018
- completed
- 0
- cumulative oil, bbl
- 948K
- cumulative gas, mcf
PRODUCTION FROM PDQ LEASE REPORTS · Sep 2006 THROUGH Jul 2026
Regulatory status · RRC wellbore file
- Schedule
- OFF SCHEDULE
- Completed
- Aug 22, 2018
- 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 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 |
|---|---|---|---|---|---|---|
| Thomas Unit G-4-291039 | Riggan (8900) | Dewbre Petroleum Corporation | 1 | 0 | 88.9K | Jul 2021 – Jul 2026 |
| Thomas Unit G-4-223510 | Riggan (F-20) | Dewbre Petroleum Corporation | 1 | 0 | 859K | Sep 2006 – Jul 2021 |
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.
- 1Dewbre Petroleum CorporationSep 2006 → Mar 2023
Permits
| Permit | Type | Operator | Received | Issued | Spud | Depth |
|---|---|---|---|---|---|---|
| 871157-99 | Recompletion | Dewbre Petroleum Corporation | Jul 12, 2021 | Jul 14, 2021 | Jul 6, 2021 | 12,200 |
| 616530-99 | Drill | Dewbre Petroleum Corporation | Mar 27, 2006 | Mar 29, 2006 | Apr 1, 2006 | 12,300 |
Completions
| Completed | Lease | Field | Operator | Status | Depth |
|---|---|---|---|---|---|
| — | — G-4-223510 | — | — | — | — |
| — | — G-4-291039 | — | — | — | — |
Formation tops
As filed on W-2/G-1. Subsea from 32 ft elevation.Download CSV →
| Formation | MD ft | Subsea |
|---|---|---|
| Miocene (undifferentiated)MIOCENE-LAGARTO-OAKVILLE - INJEC | 2,512 | -2,480 |
| Miocene (undifferentiated)MIOCENE-LAGARTO-OAKVILLE; INJECT | 2,512 | -2,480 |
| CatahoulaCATAHOULA-FRIO - INJECTION/DISPO | 7,675 | -7,643 |
| CatahoulaCATAHOULA-FRIO-INJECTION/DISPOSA | 7,675 | -7,643 |
| FrioFRIO F-20 | 10,344 | -10,312 |
| CatahoulaCATAHOULA-ANAHUAC - H2S | — | — |
| CatahoulaCATAHOULA-ANAHUAC-H2S | — | — |
Perforations
Perforated and open-hole intervals.
| From | To | Type |
|---|---|---|
| 8,582 | 8,598 | Perforated |
| 8,622 | 8,630 | Perforated |
| 8,636 | 8,642 | Perforated |
| 8,930 | 8,938 | Perforated |
| 9,096 | 9,128 | Perforated |
| 10,346 | 10,354 | Perforated |
Casing
Strings as reported, shallowest first.
| Casing in | Set at | Hole in | Cement |
|---|---|---|---|
| 10.75 | 1,504 | 14.75 | 790 S |
| 7.625 | 10,338 | 9.875 | 736 S |
| 4.5 | 12,186 | 6.5 | 256 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 2, 2025 | Apr 29, 2025 | — |
| 00 | Jul 29, 2021 | Jul 26, 2021 | — |
| 00 | Jul 28, 2021 | Jul 27, 2021 | — |
| 00 | Apr 10, 2007 | Nov 1, 2006 | Yes |
| 00 | Dec 29, 2006 | — | — |
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 42-489-31141 → W-2, G-1, plugging reports, as PDFs
- Completion packets for 42-489-31141 → 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.
Beyond the permit record
RRC UIC permits · H-10 reported volumes
Injection
- 238
- bbl, last 12 reported months
- 238
- bbl, all reported
- Jan 2026
- reported through
| UIC | Kind | Status | Permitted bbl/d | Max psi | Zone ft |
|---|---|---|---|---|---|
| 000126661 | H-1 Injection | Active | 500 | 3,000 | 8,580–8,960 |
MONTHLY INJECTED, BBL · H-10 · LAST 12 REPORTED MONTHS
Last 12 months 238
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/48931141, documented in the API reference.