WELL · 42-461-31991 · DISTRICT 7
Guthrie - Dunbar Unit #1
Upton County · Heluma SE (Devonian) field · Shut IN · Vertical
Guthrie - Dunbar Unit #1 (API 42-461-31991) is a well in Upton County operated by Extex Operating Company, completed April 13, 1983 and listed as shut in on the RRC schedule.
The RRC has issued one drilling permit, issued January 20, 1983, permitted to 9,600 ft.
It was permitted by Sun Expl. & Prod. CO.-Midland and has since transferred to Extex Operating Company on the wellbore schedule.
Its lease has reported 79.9K barrels of oil and 280K mcf of gas since January 1993, last reporting in July 2026.
Operator of record
Permitted by Sun Expl. & Prod. Co.-Midland; the EWA schedule now lists a different operator.
- Based in
- Houston, TX
- P-5 status
- Active (A)
- P-5 last filed
- Jan 7, 2026
- Permits on file
- 117
- Phone
- (713) 953-0824
SOURCE · RRC EWA WELLBORE SCHEDULE
What each RRC source says
| Wellbore schedule | Extex Operating Company |
| Production reports | Legacy Reserves Operating LPthrough Feb 2020 |
| Latest permit | Sun Expl. & Prod. Co.-MidlandJan 20, 1983 |
The sources disagree, which usually means a transfer or a lease-level production filing by a different entity. Petrora goes with the schedule.
- 9,600
- total depth, ft
- 1
- permits on file
- Jan 20, 1983
- last permit issued
- Apr 13, 1983
- completed
- 79.9K
- cumulative oil, bbl
- 280K
- cumulative gas, mcf
PRODUCTION FROM PDQ LEASE REPORTS · Jan 1993 THROUGH Jul 2026
Regulatory status · RRC wellbore file
- Schedule
- ON SCHEDULE
- Completed
- Apr 13, 1983
- Shut in
- —
- 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 lease this well is completed on; this well is the only one on it.Why →
| Lease | Field | Reporting operator | Wells | Oil, bbl | Gas, mcf | Reported |
|---|---|---|---|---|---|---|
| Guthrie - Dunbar Unit O-9-10205 | Heluma, SE (Devonian) | Extex Operating Company | 1 | 79.9K | 280K | Jan 1993 – 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.
- 1Oryx Energy CompanyJan 1993 → Oct 1994
- 2Samson Resources CompanyDec 1994 → Mar 1995
- 3Samson Hydrocarbons CompanyApr 1995 → Jul 1996
- 4Samson Lone Star LPAug 1996 → Jun 2007
- 5Samson Lone Star, LLCJul 2007 → Dec 2010
- 6Three Rivers Operating Co LLCJan 2011 → Jul 2012
- 7COG Operating LLCAug 2012 → Dec 2012
- 8Legacy Reserves Operating LPJan 2013 → Feb 2020
Permits
| Permit | Type | Operator | Received | Issued | Spud | Depth |
|---|---|---|---|---|---|---|
| 183758-99 | Drill | Sun Expl. & Prod. Co.-Midland | Jan 20, 1983 | Jan 20, 1983 | Feb 10, 1983 | 9,600 |
Completions
| Completed | Lease | Field | Operator | Status | Depth |
|---|---|---|---|---|---|
| — | — O-9-10205 | — | — | — | — |
Perforations
Perforated and open-hole intervals.
| From | To | Type |
|---|---|---|
| 8,615 | 8,640 | Perforated |
| 8,892 | 8,936 | Perforated |
| 8,892 | 9,029 | Perforated |
| 8,952 | 9,000 | Perforated |
| 9,017 | 9,029 | Perforated |
| 9,120 | 9,132 | Perforated |
| 9,216 | 9,230 | Perforated |
Casing
Strings as reported, shallowest first.
| Casing in | Set at | Hole in | Cement |
|---|---|---|---|
| 13.375 | 651 | 17.5 | 725 S |
| 8.625 | 3,801 | 11 | 1,550 S |
| 2.875 | 6,003 | — | — |
| 5.5 | 9,500 | 7.875 | 750 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 29, 2002 | Mar 11, 2002 | — |
| 00 | Jan 12, 1984 | Jun 15, 1983 | — |
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 42-461-31991 → W-2, G-1, plugging reports, as PDFs
- Completion packets for 42-461-31991 → scanned completion filings
Log images are in archives with no per-well link: the RRC's Neubus archive (2004 onward) and the University Lands library. 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/46131991, documented in the API reference.