WELL · 42-461-35949 · DISTRICT 7
University 4-8 #1
Upton County · Spraberry (Trend Area) field · Vertical
University 4-8 #1 (API 42-461-35949) is a plugged well in Upton County, plugged May 31, 2016, last operated by Pioneer Natural Res. USA Inc..
The RRC has issued 2 drilling permits between 2008 and 2009, permitted to 10,500 ft.
Completion filings report 5 formation tops, including Top Upper Spaberry, Spraberry, Dean, Wolfcamp.
Its 3 leases have reported 396K barrels of oil and 559K mcf of gas since October 2008, last reporting in July 2026. The leases carry 6 wells, so these are lease totals, not this well alone.
Operator of record
- Based in
- Spring, TX
- P-5 status
- Active (A)
- P-5 last filed
- Jul 8, 2026
- Permits on file
- 15,628
- Phone
- (972) 444-4001
SOURCE · RRC EWA WELLBORE SCHEDULE
What each RRC source says
| Wellbore schedule | Pioneer Natural Res. USA Inc. |
| Production reports | Pioneer Natural Res. USA, Inc.through Apr 2026 |
| Latest permit | Pioneer Natural Res. USA, Inc.Mar 23, 2009 |
- 10,500
- total depth, ft
- 2
- permits on file
- Mar 23, 2009
- last permit issued
- Mar 19, 2009
- completed
- 396K
- cumulative oil, bbl
- 559K
- cumulative gas, mcf
PRODUCTION FROM PDQ LEASE REPORTS · Oct 2008 THROUGH Jul 2026
Regulatory status · RRC wellbore file
- Schedule
- OFF SCHEDULE
- Completed
- Mar 19, 2009
- Shut in
- —
- Plugged
- May 31, 2016
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 6 wells in total, so volumes are shared.Why →
| Lease | Field | Reporting operator | Wells | Oil, bbl | Gas, mcf | Reported |
|---|---|---|---|---|---|---|
| University "4-8" O-9-16925 | Spraberry (Trend Area) | Pioneer Natural Res. USA, Inc. | 4 | 396K | 557K | Mar 2009 – Jul 2026 |
| University "4-8" O-9-16792 | Sheep Mountain (Consolidated) | Pioneer Natural Res. USA, Inc. | 1 | 295 | 1.35K | Oct 2008 – Sep 2009 |
| University "4-8" O-9-16770 | Spraberry (Trend Area) | Pioneer Natural Res. USA, Inc. | 1 | 0 | 0 | Oct 2008 – Jan 2009 |
Oil, barrels lease total
Last 12 months 20,827 · prior 12 21,439(-3%)
Gas, mcf lease total
Last 12 months 29,334 · prior 12 35,816(-18%)
Chain of custody
Every operator that reported production on this well's lease, in order.
- 1Pioneer Natural Res. USA, Inc.Oct 2008 → Apr 2026
Permits
| Permit | Type | Operator | Received | Issued | Spud | Depth |
|---|---|---|---|---|---|---|
| 679405-99 | Recompletion | Pioneer Natural Res. USA, Inc. | Mar 12, 2009 | Mar 23, 2009 | Mar 2, 2009 | 10,250 |
| 664310-99 | Drill | Pioneer Natural Res. USA, Inc. | Jun 12, 2008 | Jun 28, 2008 | Jul 29, 2008 | 10,500 |
Completions
| Completed | Lease | Field | Operator | Status | Depth |
|---|---|---|---|---|---|
| Mar 19, 2009 | University 4-8 O-9-16925 | Spraberry (Trend Area) | Pioneer Natural Res. USA Inc. | Plugged | — |
| Oct 1, 2008 | University 4-8 O-9-16792 | Sheep Mountain (Consolidated) | Pioneer Natural Res. USA Inc. | Plugged | — |
| — | University 4-8 O-9-16770 | Spraberry (Trend Area) | Pioneer Natural Res. USA Inc. | Plugged | — |
Formation tops
As filed on W-2/G-1. Subsea from 2,742 ft elevation.Download CSV →
Perforations
Perforated and open-hole intervals.
| From | To | Type |
|---|---|---|
| 6,406 | 6,642 | Perforated |
| 7,218 | 7,229 | Perforated |
| 7,728 | 8,149 | Perforated |
| 8,475 | 8,705 | Perforated |
| 9,614 | 9,781 | Perforated |
Casing
Strings as reported, shallowest first.
| Casing in | Set at | Hole in | Cement |
|---|---|---|---|
| 8.625 | 648 | 11 | 400 S |
| 4.5 | 10,248 | 7.875 | 1,200 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 10, 2010 | May 4, 2009 | Yes |
| 00 | Jul 7, 2009 | — | — |
| 00 | Jan 29, 2009 | Dec 22, 2008 | Yes |
| 00 | Jan 13, 2009 | — | — |
| 00 | Jan 6, 2009 | — | — |
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 42-461-35949 → W-2, G-1, plugging reports, as PDFs
- Completion packets for 42-461-35949 → 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/46135949, documented in the API reference.