TEXAS · WELLS · UPTON COUNTY · API 42-461-35947 · DISTRICT 6E
University 4-20A #1
Upton County · Sheep Mountain (Consolidated) field · Shut In · Vertical
University 4-20a #1 (API 42-461-35947) is a well in Upton County operated by Pioneer Natural Res. USA Inc., completed October 8, 2008 and listed as shut in on the RRC schedule, shut in July 1, 2020.
The RRC has issued one drilling permit, issued June 28, 2008, permitted to 10,258 ft.
Completion filings report 3 formation tops, including Spraberry, Dean, Strawn.
Its 2 leases have reported 56.1K barrels of oil and 197K mcf of gas since October 2008, with no volume in the three years through April 2026. The leases carry 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 Jun 2020 |
| Latest permit | Pioneer Natural Res. USA, Inc.Jun 28, 2008 |
- 10,258
- total depth, ft
- 1
- permits on file
- Jun 28, 2008
- last permit issued
- Oct 8, 2008
- completed
- 56.1K
- cumulative oil, bbl
- 197K
- cumulative gas, mcf
PRODUCTION FROM PDQ LEASE REPORTS · Oct 2008 THROUGH Jun 2020
Regulatory status · RRC wellbore file
- Schedule
- ON SCHEDULE
- Completed
- Oct 8, 2008
- Shut in
- Jul 1, 2020
- 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 |
|---|---|---|---|---|---|---|
| University 4-20A O-9-16754 | Sheep Mountain (Consolidated) | Pioneer Natural Res. USA, Inc. | 1 | 56.1K | 197K | Oct 2008 – Jun 2020 |
| University "4-20" O-9-16736 | Spraberry (Trend Area) | Pioneer Natural Res. USA, Inc. | 1 | 0 | 0 | Oct 2008 – — |
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.
- 1Pioneer Natural Res. USA, Inc.Oct 2008 → Mar 2020
Permits
| Permit | Type | Operator | Received | Issued | Spud | Depth |
|---|---|---|---|---|---|---|
| 664317-99 | Drill | Pioneer Natural Res. USA, Inc. | Jun 12, 2008 | Jun 28, 2008 | Aug 15, 2008 | 10,500 |
Completions
| Completed | Lease | Field | Operator | Status | Depth |
|---|---|---|---|---|---|
| Oct 8, 2008 | University 4-20A O-9-16754 | Sheep Mountain (Consolidated) | Pioneer Natural Res. USA Inc. | Shut In · shut in Jul 1, 2020 | 10,258 |
| — | University 4-20 O-9-16736 | Spraberry (Trend Area) | Pioneer Natural Res. USA Inc. | Not on Schedule | — |
Formation tops
As filed on W-2/G-1. Subsea from 2,845 ft elevation.Download CSV →
Perforations
Perforated and open-hole intervals.
| From | To | Type |
|---|---|---|
| 9,470 | 9,907 | Perforated |
Casing
Strings as reported, shallowest first.
| Casing in | Set at | Hole in | Cement |
|---|---|---|---|
| 8.625 | 772 | 11 | 450 S |
| 4.5 | 10,217 | 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. 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 | Jan 15, 2009 | Nov 14, 2008 | Yes |
| 00 | Dec 11, 2008 | — | — |
| 00 | Dec 2, 2008 | — | — |
Well logs
1 log loaded from the RRC's log index, the latest received Feb 6, 2009. Neutron. 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 |
|---|---|---|---|---|
| NEUTRON POROSITYSpans Spraberry, Dean, Strawn | TIFF | 0 to 10,143 | Feb 6, 2009run Sep 3, 2008 | 4.18 |
"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 42-461-35947 → W-2, G-1, plugging reports, as PDFs
- Completion packets for 42-461-35947 → 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/46135947, documented in the API reference.