TEXAS · WELLS · MIDLAND COUNTY · PRESTON SPRABERRY UNIT LEASE · API 42-329-35989 · DISTRICT 7B
Preston Spraberry Unit #4021A
Midland County · Spraberry (Trend Area) field · Vertical
Preston Spraberry Unit #4021A (API 42-329-35989) is a plugged well in Midland County, plugged August 2, 2019, last operated by Pioneer Natural Res. USA Inc..
The RRC has issued one drilling permit, issued August 14, 2008, permitted to 9,175 ft.
Completion filings report 2 formation tops, including Spraberry, Dean.
Its lease has reported 17.9M barrels of oil and 54.6M mcf of gas since the record begins in January 1993, last reporting volume in July 2026. The lease carries 391 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 Jul 2026 |
| Latest permit | Pioneer Natural Res. USA, Inc.Aug 14, 2008 |
- 9,175
- total depth, ft
- 1
- permits on file
- Aug 14, 2008
- last permit issued
- Mar 20, 2017
- completed
- 17.9M
- cumulative oil, bbl
- 54.6M
- cumulative gas, mcf
PRODUCTION FROM PDQ LEASE REPORTS · ON RECORD FROM JAN 1993, THE RECORD'S FIRST MONTH, THROUGH JUL 2026
Regulatory status · RRC wellbore file
- Schedule
- OFF SCHEDULE
- Completed
- Mar 20, 2017
- Shut in
- —
- Plugged
- Aug 2, 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 391 wells in total, so volumes are shared.Why →
| Lease | Field | Reporting operator | Wells | Oil, bbl | Gas, mcf | Reported |
|---|---|---|---|---|---|---|
| Preston Spraberry Unit O-10-18551 | Spraberry (Trend Area) | Pioneer Natural Res. USA, Inc. | 391 | 17.9M | 54.6M | by Jan 1993 – Jul 2026 |
Oil, barrels lease total
Last 12 months 55,727 · prior 12 162,036(-66%)
Gas, mcf lease total
Last 12 months 475,915 · prior 12 739,434(-36%)
Wells named Preston Spraberry Unit
Pioneer Natural Res. USA Inc.'s other wells filed under this lease name in Midland 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
Operator on the lease's P-4
Each operator named on the P-4 filings for this well's lease (a gas well is its own lease), from the date its filing took effect. The P-4 is filed by lease, so a date before the well was drilled is the lease's.
| Operator | From | To |
|---|---|---|
| Pioneer Natural Res. USA, Inc. | Sep 1, 1997 | today |
Reporting production
Every operator that reported production on this well's lease, in order.
- 1Parker & Parsley Development Co.Jan 1993 → Feb 1995
- 2Parker & Parsley Development L.PMar 1995 → Aug 1997
- 3Pioneer Natural Res. USA, Inc.Sep 1997 → Jul 2026
Permits
| Permit | Type | Operator | Received | Issued | Spud | Depth |
|---|---|---|---|---|---|---|
| 664203-99 | Drill | Pioneer Natural Res. USA, Inc. | Jun 11, 2008 | Aug 14, 2008 | Dec 3, 2008 | 9,175 |
Completions
| Completed | Lease | Field | Operator | Status | Depth |
|---|---|---|---|---|---|
| Mar 20, 2017 | Preston Spraberry Unit O-10-18551 | Spraberry (Trend Area) | Pioneer Natural Res. USA Inc. | Plugged | — |
Formation tops
As filed on W-2/G-1. Subsea from 2,719 ft elevation.Download CSV →
Perforations
Perforated and open-hole intervals.
| From | To | Type |
|---|---|---|
| 7,053 | 7,215 | Perforated |
| 7,667 | 7,794 | Perforated |
| 7,855 | 7,935 | Perforated |
| 8,465 | 8,586 | Perforated |
Casing
Strings as reported, shallowest first.
| Casing in | Set at | Hole in | Cement |
|---|---|---|---|
| 8.625 | 419 | 11 | 400 S |
| 4.5 | 8,896 | 7.875 | 700 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 | Aug 16, 2018 | Aug 15, 2018 | — |
| 00 | Sep 18, 2009 | May 1, 2009 | Yes |
| 00 | Sep 17, 2009 | — | — |
Well logs
1 log loaded from the RRC's log index, the latest received Sep 24, 2009. Resistivity.
Click a log to get its files from the RRC (free account). It opens in a new tab on the RRC's log search for this well, which lists each file to view or download; the RRC has no address for a single file.
| Logas described | Files | Intervalft, as filed | Datereceived | SizeMB |
|---|---|---|---|---|
| RESISTIVITYSpans Spraberry, Dean | TIFF | 3,920 to 8,861 | Sep 24, 2009run Dec 18, 2008 | 21.0 |
"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.
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.
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 42-329-35989 → W-2, G-1, plugging reports, as PDFs
- Completion packets for 42-329-35989 → scanned completion filings
The logs loaded for this well are under Well logs, with the RRC's log search for it.
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/32935989, documented in the API reference.