WELL · 42-349-34725 · DISTRICT 5
Cerf #4
Navarro County · Powell field · Vertical
Cerf #4 (API 42-349-34725) is a well in Navarro County operated by Thurston Texas Operating CO LLC, completed November 17, 2005.
The RRC has issued 2 drilling permits (amended once) between 2005 and 2015, permitted to 3,400 ft.
Completion filings report one formation top, including Austin Chalk.
Its 3 leases have reported 116K barrels of oil and 67.3K mcf of gas since August 2005, last reporting in July 2026. The leases carry 25 wells, so these are lease totals, not this well alone.
Operator of record
Thurston Texas Operating Co LLC
Dallas, TX · P-5 Y, filed Dec 6, 2024 · 10 permits on file · (214) 669-8655
SOURCE · RRC EWA WELLBORE SCHEDULE
What each RRC source says
| Wellbore schedule | Thurston Texas Operating Co LLC |
| Production reports | KO Operating LLCthrough Mar 2026 |
| Latest permit | Thurston Texas Operating Co LLCNov 5, 2015 |
The sources disagree, which usually means a transfer or a lease-level production filing by a different entity. Petrora goes with the schedule.
- 3,400
- total depth, ft
- 3
- permits on file
- Nov 5, 2015
- last permit issued
- Nov 17, 2005
- completed
- 116K
- cumulative oil, bbl
- 67.3K
- cumulative gas, mcf
PRODUCTION FROM PDQ LEASE REPORTS · Aug 2005 THROUGH Jul 2026
Regulatory status · RRC wellbore file
- Schedule
- OFF SCHEDULE
- Completed
- Nov 17, 2005
- 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 25 wells in total, so volumes are shared.Why →
| Lease | Field | Reporting operator | Wells | Oil, bbl | Gas, mcf | Reported |
|---|---|---|---|---|---|---|
| Cerf-A O-5-3856 | Corsicana (Shallow) | KO Operating LLC | 19 | 63.1K | 22.6K | Sep 2007 – Jul 2026 |
| Cerf O-5-4213 | Corsicana (Shallow) | Thurston Texas Operating Co LLC | 3 | 0 | 0 | Nov 2015 – Jun 2016 |
| Cerf O-5-3811 | Powell | Thurston Texas Operating Co LLC | 3 | 52.6K | 44.7K | Aug 2005 – Mar 2016 |
Oil, barrels lease total
Last 12 months 561 · prior 12 369(+52%)
Chain of custody
Every operator that reported production on this well's lease, in order.
- 1Tuleta Energy Partners, LLCAug 2005 → Mar 2007
- 2Activa Resources, Ltd.Apr 2007 → Mar 2008
- 3Activa Resources, LLCApr 2008 → Dec 2012
- 4Thurston Texas Operating Co LLCJan 2013 → Jul 2016
- 5Iskandia Energy Operating, Inc.Aug 2016 → Sep 2024
- 6KO Operating LLCOct 2024 → Mar 2026
Permits
| Permit | Type | Operator | Received | Issued | Spud | Depth |
|---|---|---|---|---|---|---|
| 811485-99 | Field transfer | Thurston Texas Operating Co LLC | Oct 23, 2015 | Nov 5, 2015 | — | 2,800 |
| 606460-98 | Drill | Tuleta Energy Partners, LLC | Sep 27, 2005 | Sep 16, 2005 | Oct 4, 2005 | 3,400 |
| 606460-99 | Drill | Tuleta Energy Partners, LLC | Sep 16, 2005 | Sep 16, 2005 | — | 3,400 |
Completions
| Completed | Lease | Field | Operator | Status | Depth |
|---|---|---|---|---|---|
| — | — O-5-3811 | — | — | — | — |
| — | — O-5-3856 | — | — | — | — |
| — | — O-5-4213 | — | — | — | — |
Formation tops
As filed on W-2/G-1. Subsea from 430 ft elevation.Download CSV →
| Formation | MD ft | Subsea |
|---|---|---|
| Austin Chalk | 2,106 | -1,676 |
Perforations
Perforated and open-hole intervals.
| From | To | Type |
|---|---|---|
| 2,370 | 2,510 | Perforated |
Casing
Strings as reported, shallowest first.
| Casing in | Set at | Hole in | Cement |
|---|---|---|---|
| 8.625 | 115 | 11 | 50 S |
| 4.5 | 2,750 | 7.875 | 531 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 | Apr 7, 2016 | Nov 9, 2015 | — |
| 00 | Apr 7, 2016 | — | — |
| 00 | Mar 29, 2016 | Nov 29, 2005 | Yes |
| 00 | Jan 15, 2016 | Nov 29, 2005 | Yes |
| 00 | Mar 1, 2006 | Nov 29, 2005 | Yes |
| 00 | Dec 16, 2005 | — | — |
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 42-349-34725 → W-2, G-1, plugging reports, as PDFs
- Completion packets for 42-349-34725 → 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/34934725, documented in the API reference.