WELL · 42-211-31716 · DISTRICT 10
Studer #4
Hemphill County · Canadian SE. (Tonkawa) field · Vertical
Studer #4 (API 42-211-31716) is a plugged well in Hemphill County, plugged May 20, 2010, last operated by Sundown Energy LP.
The RRC has issued 2 drilling permits between 1984 and 2004, permitted to 7,870 ft.
It was permitted by Sundown Energy, Inc. and has since transferred to Sundown Energy LP on the wellbore schedule.
Completion filings report 2 formation tops, including Douglas, Tonkawa.
Operator of record
Permitted by Sundown Energy, Inc.; the EWA schedule now lists a different operator.
- Based in
- Dallas, TX
- P-5 status
- Active – Extension (X)
- P-5 last filed
- Jun 3, 2026
- Permits on file
- 300
- Phone
- (214) 368-6100
SOURCE · RRC EWA WELLBORE SCHEDULE
What each RRC source says
| Wellbore schedule | Sundown Energy LP |
| Production reports | Sundown Energy LPthrough Sep 2006 |
| Latest permit | Sundown Energy, Inc.Apr 2, 2004 |
The sources disagree, which usually means a transfer or a lease-level production filing by a different entity. Petrora goes with the schedule.
- 7,870
- total depth, ft
- 2
- permits on file
- Apr 2, 2004
- last permit issued
- Mar 11, 2004
- completed
- 0
- cumulative oil, bbl
- 398K
- cumulative gas, mcf
PRODUCTION FROM PDQ LEASE REPORTS · Jan 1993 THROUGH May 2010
Regulatory status · RRC wellbore file
- Schedule
- OFF SCHEDULE
- Completed
- Mar 11, 2004
- Shut in
- —
- Plugged
- May 20, 2010
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 |
|---|---|---|---|---|---|---|
| Studer G-14-114850 | Canadian, SE (Douglas) | Sundown Energy LP | 1 | 0 | 322K | Jan 1993 – May 2010 |
| Studer G-14-209402 | Canadian, SE. (Tonkawa) | Sundown Energy LP | 1 | 0 | 76K | Mar 2004 – May 2010 |
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.
- 1BHP Petroleum (Americas) Inc.Jan 1993 → May 1995
- 2Coenergy Operating CompanyJun 1995 → Jan 1997
- 3McNic Oil & Gas Midcontinent,incFeb 1997 → Jul 1999
- 4Sundown Energy, Inc.Aug 1999 → Feb 2004
- 5Sundown Energy LPMar 2004 → Sep 2006
Permits
| Permit | Type | Operator | Received | Issued | Spud | Depth |
|---|---|---|---|---|---|---|
| 543781-99 | Recompletion | Sundown Energy, Inc. | Mar 29, 2004 | Apr 2, 2004 | — | 7,870 |
| 249778-99 | Drill | Monsanto Oil Company | Aug 20, 1984 | Aug 28, 1984 | Oct 4, 1984 | 7,500 |
Completions
| Completed | Lease | Field | Operator | Status | Depth |
|---|---|---|---|---|---|
| — | — G-14-114850 | — | — | — | — |
| — | — G-14-209402 | — | — | — | — |
Formation tops
As filed on W-2/G-1. Subsea from 2,476 ft elevation.Download CSV →
Perforations
Perforated and open-hole intervals.
| From | To | Type |
|---|---|---|
| 7,016 | 7,081 | Perforated |
| 7,745 | 7,757 | Perforated |
Casing
Strings as reported, shallowest first.
| Casing in | Set at | Hole in | Cement |
|---|---|---|---|
| 9.625 | 1,109 | 12.25 | 350 S |
| 5.5 | 7,870 | 7.875 | 215 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 18, 2007 | Apr 26, 2004 | Yes |
| 00 | Sep 15, 2005 | Jun 7, 2004 | Yes |
| 00 | Jul 14, 2005 | — | — |
| 00 | Mar 12, 1985 | Feb 21, 1985 | — |
| 00 | Mar 2, 1985 | Feb 8, 1985 | — |
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 42-211-31716 → W-2, G-1, plugging reports, as PDFs
- Completion packets for 42-211-31716 → 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/21131716, documented in the API reference.