TEXAS · WELLS · REAGAN COUNTY · UNIVERSITY "58-31" LEASE · API 42-383-36067 · DISTRICT 6E
University 58-31 #4
Reagan County · Spraberry (Trend Area) field · Vertical
University 58-31 #4 (API 42-383-36067) is a plugged well in Reagan County, plugged December 3, 2019, last operated by Pioneer Natural Res. USA Inc..
The RRC has issued one drilling permit, issued November 26, 2007, permitted to 9,575 ft.
Completion filings report 3 formation tops, including Spraberry, Dean, Wolfcamp.
Its lease has reported 21.7K barrels of oil and 109K mcf of gas since April 2008, with no volume in the three years through August 2026. The lease carries 2 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
- 15,633
- 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 Dec 2019 |
| Latest permit | Pioneer Natural Res. USA, Inc.Nov 26, 2007 |
- 9,575
- total depth, ft
- 1
- permits on file
- Nov 26, 2007
- last permit issued
- Apr 14, 2008
- completed
- 21.7K
- cumulative oil, bbl
- 109K
- cumulative gas, mcf
PRODUCTION FROM PDQ LEASE REPORTS · APR 2008 THROUGH DEC 2019
Regulatory status · RRC wellbore file
- Schedule
- OFF SCHEDULE
- Completed
- Apr 14, 2008
- Shut in
- —
- Plugged
- Dec 3, 2019
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.
Wells nearby
Every well with a location on file around this well, in any state, nearest first.
Texas locations come from drilling permits, so most older Texas wells have none and are not listed.
Lease production
PDQ LEASE REPORTS · REPORTED THROUGH AUG 2026
Texas reports oil by lease, not by well. These are the lease 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 |
|---|---|---|---|---|---|---|
| University "58-31" O-9-16591 | Spraberry (Trend Area) | Pioneer Natural Res. USA, Inc. | 2 | 21.7K | 109K | Apr 2008 – Dec 2019 |
No volumes reported on these leases in the last three years.
Wells named University 58-31
Pioneer Natural Res. USA Inc.'s other wells filed under this lease name in Reagan County, newest permit first. The RRC gives a gas well its own lease number, so the name is what joins the wells of a unit.
Loading the lease's wellsChain of custody
Every operator that reported production on this well's lease, in order.
- 1Pioneer Natural Res. USA, Inc.Apr 2008 → Dec 2019
Permits
| Permit | Type | Operator | Received | Issued | Spud | Depth |
|---|---|---|---|---|---|---|
| 647412-99 | Drill | Pioneer Natural Res. USA, Inc. | Oct 9, 2007 | Nov 26, 2007 | Feb 21, 2008 | 9,575 |
Completions
| Completed | Lease | Field | Operator | Status | Depth |
|---|---|---|---|---|---|
| Apr 14, 2008 | University 58-31 O-9-16591 | Spraberry (Trend Area) | Pioneer Natural Res. USA Inc. | Plugged | — |
Formation tops
As filed on W-2/G-1. Subsea from 2,592 ft elevation.Download CSV →
Perforations
Perforated and open-hole intervals.
| From | To | Type |
|---|---|---|
| 5,715 | 5,892 | Perforated |
| 6,329 | 6,599 | Perforated |
| 7,150 | 7,569 | Perforated |
| 7,711 | 8,092 | Perforated |
Casing
Strings as reported, shallowest first.
| Casing in | Set at | Hole in | Cement |
|---|---|---|---|
| 8.625 | 563 | 11 | 300 S |
| 4.5 | 8,475 | 7.875 | 1,000 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. The record date is the RRC's own date on the record, not the day the report was filed: 462,034 of the state's filings carry 1984-01-12. About these reports →
| Suffix | RRC record date | W-2 / G-1 date | Logs referenced |
|---|---|---|---|
| 00 | Jul 30, 2008 | Jun 19, 2008 | Yes |
| 00 | Jul 21, 2008 | — | — |
Well logs
1 log loaded from the RRC's log index, the latest received Oct 2, 2008. Resistivity. These are the logs loaded into Petrora from the Railroad Commission's inventories, not necessarily every log run on the well. The RRC holds the files; each opens from its log search for the well. The kind is the RRC's description of the log; the interval is the one filed for it.
Open the RRC's log search for this well ↗| Logas described | Files | Intervalft, as filed | Datereceived | SizeMB |
|---|---|---|---|---|
| RESISTIVITYSpans Spraberry, Dean, Wolfcamp | TIFF | 0 to 8,408 | Oct 2, 2008run Mar 6, 2008 | 4.26 |
"Spans" is by this well's own filed formation tops: a formation runs from its top to the next deeper top filed, and the deepest runs to the bottom of the log. Depths are measured along the wellbore, so on a horizontal the lateral counts in the formation it was landed in.
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 42-383-36067 → W-2, G-1, plugging reports, as PDFs
- Completion packets for 42-383-36067 → scanned completion filings
The logs loaded for this well are under Well logs, with the RRC's log search for it. The University Lands library has no per-well link: then paste it into its 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/38336067, documented in the API reference.