TEXAS · WELLS · NACOGDOCHES COUNTY · API 42-347-31723 · DISTRICT 06
Mast GU 1 #1
Nacogdoches County · Nacogdoches E. (James Lime) field · SWR-10-Well · Vertical
Mast GU 1 #1 (API 42-347-31723) is a well in Nacogdoches County operated by Texian Operating Company LLC, completed February 6, 2006 and listed as swr-10-well on the RRC schedule, shut in August 1, 2015.
The RRC has issued 2 drilling permits between 2001 and 2006, permitted to 10,440 ft.
It was permitted by Samson Lone Star LP and has since transferred to Texian Operating Company LLC on the wellbore schedule.
Completion filings report 3 formation tops, including Rodessa, James Lime, Pettit.
No lease production has been reported under this well’s leases.
Operator of record
Permitted by Samson Lone Star LP; the EWA schedule now lists a different operator.
- Based in
- Irving, TX
- P-5 status
- Active – Extension (X)
- P-5 last filed
- Jun 12, 2026
- Phone
- (817) 633-7777
SOURCE · RRC EWA WELLBORE SCHEDULE
What each RRC source says
| Wellbore schedule | Texian Operating Company LLC |
| Production reports | Rockcliff Energy Operating LLCthrough May 2018 |
| Latest permit | Samson Lone Star LPFeb 7, 2006 |
The sources disagree, which usually means a transfer or a lease-level production filing by a different entity. Petrora goes with the schedule.
- 10,440
- total depth, ft
- 2
- permits on file
- Feb 7, 2006
- last permit issued
- Feb 6, 2006
- completed
- 0
- cumulative oil, bbl
- 262K
- cumulative gas, mcf
PRODUCTION FROM PDQ LEASE REPORTS · May 2002 THROUGH Jul 2026
Regulatory status · RRC wellbore file
- Schedule
- ON SCHEDULE
- Completed
- Feb 6, 2006
- Shut in
- Aug 1, 2015
- Plugged
- —
Operator's P-5 on the schedule: Active (A)
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 |
|---|---|---|---|---|---|---|
| Mast GU 1 G-6-189253 | Douglass, W. (Travis Peak) | Texian Operating Company, LLC | 1 | 0 | 257K | May 2002 – Jul 2026 |
| Mast GU 1 G-6-219185 | Nacogdoches, E. (James Lime) | Texian Operating Company, LLC | 1 | 0 | 5.65K | Feb 2006 – Jul 2026 |
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.
- 1Samson Lone Star LPMay 2002 → Jun 2007
- 2Samson Lone Star, LLCJul 2007 → Jul 2015
- 3Rockcliff Energy Operating LLCMay 2018 → May 2018
Permits
| Permit | Type | Operator | Received | Issued | Spud | Depth |
|---|---|---|---|---|---|---|
| 613409-99 | Recompletion | Samson Lone Star LP | Feb 1, 2006 | Feb 7, 2006 | — | 10,440 |
| 513634-99 | Drill | Samson Lone Star LP | Sep 17, 2001 | Sep 17, 2001 | Mar 12, 2002 | 11,000 |
Completions
| Completed | Lease | Field | Operator | Status | Depth |
|---|---|---|---|---|---|
| Dec 28, 2006 | Mast GU 1 G-6-189253 | Douglass W. (Travis Peak) | Texian Operating Company LLC | Temp Abandoned · shut in Aug 1, 2015 | 10,440 |
| Feb 6, 2006 | Mast GU 1 G-6-219185 | Nacogdoches E. (James Lime) | Texian Operating Company LLC | SWR-10-Well · shut in Nov 1, 2006 | 10,440 |
Formation tops
As filed on W-2/G-1. Subsea from 455 ft elevation.Download CSV →
| Formation | MD ft | Subsea |
|---|---|---|
| Rodessa | 8,170 | -7,715 |
| James LimeJAMES | 8,679 | -8,224 |
| Pettit | 8,939 | -8,484 |
Perforations
Perforated and open-hole intervals.
| From | To | Type |
|---|---|---|
| 8,688 | 8,831 | Perforated |
| 9,694 | 9,886 | Perforated |
| 9,694 | 9,986 | Perforated |
Casing
Strings as reported, shallowest first.
| Casing in | Set at | Hole in | Cement |
|---|---|---|---|
| 9.625 | 2,893 | 12.25 | 990 S |
| 4.5 | 10,440 | 7.875 | 850 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 | May 9, 2007 | Feb 7, 2007 | — |
| 00 | Feb 8, 2007 | Mar 23, 2006 | Yes |
| 00 | Sep 20, 2006 | — | — |
| 00 | Aug 29, 2002 | Aug 2, 2002 | — |
| 00 | Jul 30, 2002 | Jun 17, 2002 | Yes |
| 00 | Jul 11, 2002 | — | — |
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 42-347-31723 → W-2, G-1, plugging reports, as PDFs
- Completion packets for 42-347-31723 → 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/34731723, documented in the API reference.