TEXAS · WELLS · UPTON COUNTY · HALFF ESTATE "D" LEASE · API 42-461-35296 · DISTRICT 6E
Halff Estate D #2
Upton County · Spraberry (Trend Area) field · Producing · Vertical
Halff Estate D #2 (API 42-461-35296) is a well in Upton County operated by Pioneer Natural Res. USA Inc., completed April 4, 2007 and listed as producing on the RRC schedule.
The RRC has issued one drilling permit, issued February 23, 2007, permitted to 10,140 ft.
It was permitted by JM Cox Resources, L.P. and has since transferred to Pioneer Natural Res. USA Inc. on the wellbore schedule.
Completion filings report 4 formation tops, including San Andres, Spraberry, Dean, Wolfcamp.
Its lease has reported 32.7K barrels of oil and 79.8K mcf of gas since April 2007, last reporting volume in April 2026.
Operator of record
Permitted by JM Cox Resources, L.P.; 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 Apr 2026 |
| Latest permit | JM Cox Resources, L.P.Feb 23, 2007 |
The sources disagree, which usually means a transfer or a lease-level production filing by a different entity. Petrora goes with the schedule.
- 10,140
- total depth, ft
- 1
- permits on file
- Feb 23, 2007
- last permit issued
- Apr 4, 2007
- completed
- 32.7K
- cumulative oil, bbl
- 79.8K
- cumulative gas, mcf
PRODUCTION FROM PDQ LEASE REPORTS · Apr 2007 THROUGH Apr 2026
Regulatory status · RRC wellbore file
- Schedule
- ON SCHEDULE
- Completed
- Apr 4, 2007
- Shut in
- —
- 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; this well is the only one on it.Why →
| Lease | Field | Reporting operator | Wells | Oil, bbl | Gas, mcf | Reported |
|---|---|---|---|---|---|---|
| Halff Estate "D" O-9-16222 | Spraberry (Trend Area) | Pioneer Natural Res. USA, Inc. | 1 | 32.7K | 79.8K | Apr 2007 – Apr 2026 |
Oil, barrels lease total
Last 12 months 84 · prior 12 720(-88%)
Gas, mcf lease total
Last 12 months 2,659 · prior 12 1,828(+45%)
Chain of custody
Every operator that reported production on this well's lease, in order.
- 1JM Cox Resources, L.P.Apr 2007 → Jul 2018
- 2DE3 Operating LLCAug 2018 → May 2021
- 3Pioneer Natural Res. USA, Inc.Jun 2021 → Apr 2026
Permits
| Permit | Type | Operator | Received | Issued | Spud | Depth |
|---|---|---|---|---|---|---|
| 633731-99 | Drill | JM Cox Resources, L.P. | Feb 16, 2007 | Feb 23, 2007 | Feb 28, 2007 | 10,400 |
Completions
| Completed | Lease | Field | Operator | Status | Depth |
|---|---|---|---|---|---|
| Apr 4, 2007 | Halff Estate D O-9-16222 | Spraberry (Trend Area) | Pioneer Natural Res. USA Inc. | Producing | 10,140 |
Formation tops
As filed on W-2/G-1. Subsea from 2,589 ft elevation.Download CSV →
| Formation | MD ft | Subsea |
|---|---|---|
| San Andres | 4,790 | -2,201 |
| Spraberry | 6,950 | -4,361 |
| Dean | 8,330 | -5,741 |
| Wolfcamp | 8,790 | -6,201 |
Perforations
Perforated and open-hole intervals.
| From | To | Type |
|---|---|---|
| 8,368 | 8,482 | Perforated |
| 8,808 | 8,686 | Perforated |
| 8,948 | 9,100 | Perforated |
| 9,197 | 9,370 | Perforated |
| 9,504 | 9,637 | Perforated |
| 9,820 | 9,934 | Perforated |
Casing
Strings as reported, shallowest first.
| Casing in | Set at | Hole in | Cement |
|---|---|---|---|
| 13.375 | 439 | 17.5 | 400 S |
| 8.625 | 4,516 | 11 | 1,400 S |
| 5.5 | 10,138 | 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 | May 24, 2007 | May 10, 2007 | Yes |
| 00 | May 18, 2007 | — | — |
Well logs
2 logs loaded from the RRC's log index, the latest received Mar 24, 2010. Neutron, 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 |
|---|---|---|---|---|
| NEUTRON POROSITYSpans San Andres, Spraberry, Dean, Wolfcamp | TIFF | 6,000 to 10,007 | Mar 24, 2010run Mar 21, 2007 | 3.04 |
| RESISTIVITYSpans San Andres, Spraberry, Dean, Wolfcamp | TIFF | 6,200 to 10,140 | Mar 24, 2010run Mar 17, 2007 | 3.57 |
"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 42-461-35296 → W-2, G-1, plugging reports, as PDFs
- Completion packets for 42-461-35296 → 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/46135296, documented in the API reference.