TEXAS · WELLS · UPTON COUNTY · MILDRED 34 LEASE · API 42-461-39230 · DISTRICT 6E
Mildred 34 #1
Upton County · Spraberry (Trend Area) R 40 Exc field · Vertical
- Fields on the latest permit · any of 5
- Blue Danube (Devonian) · Blue Danube (Strawn) · Davis (Pennsylvanian) · King Mountain, S. (Atoka) · Spraberry (Trend Area) R 40 Exc
- Not one formation; the well must be completed in one of them, and no target formation is stated.
Mildred 34 #1 (API 42-461-39230) is a plugged well in Upton County, plugged January 12, 2022, last operated by Pioneer Natural Res. USA Inc..
The RRC has issued one drilling permit, issued January 17, 2014, permitted to 11,900 ft.
It was permitted by Parsley Energy Operations, LLC and has since transferred to Pioneer Natural Res. USA Inc. on the wellbore schedule.
Completion filings report 9 formation tops, including Yates, San Andres, Spraberry, Wolfcamp.
Its lease has reported 83.6K barrels of oil and 422K mcf of gas since March 2014, last reporting volume in March 2025. The lease carries 2 wells, so these are lease totals, not this well alone.
Operator of record
Permitted by Parsley Energy Operations, LLC; the EWA schedule now lists a different operator.
- 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 Mar 2025 |
| Latest permit | Parsley Energy Operations, LLCJan 17, 2014 |
The sources disagree, which usually means a transfer or a lease-level production filing by a different entity. Petrora goes with the schedule.
- 11,900
- total depth, ft
- 1
- permits on file
- Jan 17, 2014
- last permit issued
- Mar 28, 2014
- completed
- 83.6K
- cumulative oil, bbl
- 422K
- cumulative gas, mcf
PRODUCTION FROM PDQ LEASE REPORTS · MAY 2014 THROUGH MAR 2025
Regulatory status · RRC wellbore file
- Schedule
- OFF SCHEDULE
- Completed
- Mar 28, 2014
- Shut in
- —
- Plugged
- Jan 12, 2022
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 |
|---|---|---|---|---|---|---|
| Mildred 34 O-9-18583 | Spraberry (Trend Area) R 40 Exc | Pioneer Natural Res. USA, Inc. | 2 | 83.6K | 422K | Mar 2014 – Mar 2025 |
Gas, mcf lease total
Last 12 months 0 · prior 12 8,634(-100%)
Oil, barrels lease total
Last 12 months 0 · prior 12 521(-100%)
Wells named Mildred 34
Pioneer Natural Res. USA Inc.'s other wells filed under this lease name in Upton 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.
- 1Parsley Energy Operations, LLCMay 2014 → Jan 2021
- 2Pioneer Natural Res. USA, Inc.Feb 2021 → Mar 2025
Permits
| Permit | Type | Operator | Received | Issued | Spud | Depth |
|---|---|---|---|---|---|---|
| 776383-99 | Drill | Parsley Energy Operations, LLC | Dec 30, 2013 | Jan 17, 2014 | Feb 10, 2014 | 11,900 |
Completions
| Completed | Lease | Field | Operator | Status | Depth |
|---|---|---|---|---|---|
| Mar 28, 2014 | Mildred 34 O-9-18583 | Spraberry (Trend Area) R 40 Exc | Pioneer Natural Res. USA Inc. | Plugged | — |
Formation tops
As filed on W-2/G-1. Subsea from 2,742 ft elevation.Download CSV →
| Formation | MD ft | Subsea |
|---|---|---|
| Yates | 1,600 | 1,142 |
| San AndresSAN ANDRES - SALTWATER FLOW | 4,175 | -1,433 |
| Spraberry | 7,200 | -4,458 |
| Wolfcamp | 8,800 | -6,058 |
| Strawn | 10,526 | -7,784 |
| Devonian | — | — |
| Ellenburger | — | — |
| Fusselman | — | — |
| Grayburg | — | — |
Perforations
Perforated and open-hole intervals.
| From | To | Type |
|---|---|---|
| 8,606 | 11,689 | Perforated |
Casing
Strings as reported, shallowest first.
| Casing in | Set at | Hole in | Cement |
|---|---|---|---|
| 12.75 | 423 | 17.5 | 447 S |
| 8.625 | 4,795 | 11 | 625 S |
| 5.5 | 11,916 | 7.875 | 1,456 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 29, 2014 | Jul 17, 2014 | Yes |
Well logs
1 log loaded from the RRC's log index, the latest received Mar 1, 2017. 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 Yates, San Andres, Spraberry, Wolfcamp, Strawn | TIFF | 405 to 11,874 | Mar 1, 2017run Mar 3, 2014 | 7.33 |
"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 42-461-39230 → W-2, G-1, plugging reports, as PDFs
- Completion packets for 42-461-39230 → 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/46139230, documented in the API reference.