TEXAS · WELLS · GLASSCOCK COUNTY · MILLS "37B" LEASE · API 42-173-33441 · DISTRICT 7B
Mills 37B #1
Glasscock County · Spraberry (Trend Area) field · Shut In · Vertical
Mills 37b #1 (API 42-173-33441) is a well in Glasscock County operated by Pioneer Natural Res. USA Inc., completed April 24, 2009 and listed as shut in on the RRC schedule, shut in April 1, 2025.
The RRC has issued one drilling permit, issued September 25, 2008, permitted to 9,557 ft.
Completion filings report 2 formation tops, including Spraberry, Dean.
Its lease has reported 114K barrels of oil and 192K mcf of gas since April 2009, last reporting volume in April 2026. The lease carries 3 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.Sep 25, 2008 |
- 9,557
- total depth, ft
- 1
- permits on file
- Sep 25, 2008
- last permit issued
- Apr 24, 2009
- completed
- 114K
- cumulative oil, bbl
- 192K
- cumulative gas, mcf
PRODUCTION FROM PDQ LEASE REPORTS · Apr 2009 THROUGH Apr 2026
Regulatory status · RRC wellbore file
- Schedule
- ON SCHEDULE
- Completed
- Apr 24, 2009
- Shut in
- Apr 1, 2025
- 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 lease this well is completed on; they carry 3 wells in total, so volumes are shared.Why →
| Lease | Field | Reporting operator | Wells | Oil, bbl | Gas, mcf | Reported |
|---|---|---|---|---|---|---|
| Mills "37B" O-10-39505 | Spraberry (Trend Area) | Pioneer Natural Res. USA, Inc. | 3 | 114K | 192K | Apr 2009 – Apr 2026 |
Oil, barrels lease total
Last 12 months 169 · prior 12 1,490(-89%)
Gas, mcf lease total
Last 12 months 946 · prior 12 4,004(-76%)
Chain of custody
Every operator that reported production on this well's lease, in order.
- 1Pioneer Natural Res. USA, Inc.Apr 2009 → Apr 2026
Permits
| Permit | Type | Operator | Received | Issued | Spud | Depth |
|---|---|---|---|---|---|---|
| 670812-99 | Drill | Pioneer Natural Res. USA, Inc. | Sep 9, 2008 | Sep 25, 2008 | Mar 5, 2009 | 10,800 |
Completions
| Completed | Lease | Field | Operator | Status | Depth |
|---|---|---|---|---|---|
| Apr 24, 2009 | Mills 37B O-10-39505 | Spraberry (Trend Area) | Pioneer Natural Res. USA Inc. | Shut In · shut in Apr 1, 2025 | 9,557 |
Formation tops
As filed on W-2/G-1. Subsea from 2,640 ft elevation.Download CSV →
Perforations
Perforated and open-hole intervals.
| From | To | Type |
|---|---|---|
| 6,997 | 7,099 | Perforated |
| 7,310 | 7,495 | Perforated |
| 7,821 | 8,071 | Perforated |
| 8,361 | 7,099 | Perforated |
| 8,609 | 8,798 | Perforated |
| 9,204 | 9,416 | Perforated |
Casing
Strings as reported, shallowest first.
| Casing in | Set at | Hole in | Cement |
|---|---|---|---|
| 8.625 | 341 | 11 | 250 S |
| 4.5 | 9,556 | 7.875 | 850 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 | Oct 16, 2009 | Jun 8, 2009 | Yes |
| 00 | Sep 21, 2009 | — | — |
Well logs
1 log loaded from the RRC's log index, the latest received Nov 10, 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 | TIFF | 3,752 to 9,507 | Nov 10, 2009run Mar 18, 2009 | 2.67 |
"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 42-173-33441 → W-2, G-1, plugging reports, as PDFs
- Completion packets for 42-173-33441 → 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/17333441, documented in the API reference.