TEXAS · WELLS · UPTON COUNTY · NEFF WEST A 9-4 LEASE · API 42-461-42645 · DISTRICT 6E
Neff West a 9-4 #4401H
Upton County · Spraberry (Trend Area) field · Producing · Horizontal
Neff West A 9-4 #4401H (API 42-461-42645) is a horizontal well in Upton County operated by Diamondback E&P LLC, completed December 22, 2024 and listed as producing on the RRC schedule.
The RRC has issued one drilling permit (amended once), issued January 8, 2024, permitted to 9,746 ft.
It was permitted by De IV Operating, LLC and has since transferred to Diamondback E&P LLC on the wellbore schedule.
Completion filings report 9 formation tops, including Yates, Grayburg, San Andres, Spraberry.
Its lease has reported 369K barrels of oil and 862K mcf of gas since October 2024, last reporting volume in April 2026. The lease carries 2 wells, so these are lease totals, not this well alone.
Operator of record
Permitted by De IV Operating, LLC; the EWA schedule now lists a different operator.
- Based in
- Midland, TX
- P-5 status
- Active – Extension (X)
- P-5 last filed
- May 4, 2026
- Permits on file
- 5,251
- Phone
- (432) 221-7400
SOURCE · RRC EWA WELLBORE SCHEDULE
What each RRC source says
| Wellbore schedule | Diamondback E&P LLC |
| Production reports | Diamondback E&P LLCthrough Apr 2026 |
| Latest permit | De IV Operating, LLCJan 8, 2024 |
The sources disagree, which usually means a transfer or a lease-level production filing by a different entity. Petrora goes with the schedule.
- 9,746
- total depth, ft
- 2
- permits on file
- Jan 8, 2024
- last permit issued
- Dec 22, 2024
- completed
- 369K
- cumulative oil, bbl
- 862K
- cumulative gas, mcf
PRODUCTION FROM PDQ LEASE REPORTS · Dec 2024 THROUGH Apr 2026
Regulatory status · RRC wellbore file
- Schedule
- ON SCHEDULE
- Completed
- Dec 22, 2024
- Shut in
- —
- Plugged
- —
Operator's P-5 on the schedule: Active (A)
Surface location
31.587968, -102.090784 NAD27, as filed
31.588103, -102.091198 WGS84
Permit surface location from the RRC GIS record, referenced to NAD27 as the RRC files it; the WGS84 pair is the same point through NOAA's NADCON grid, and the map link uses it, in Upton County.
Wells nearby
Every well with a location on file around this one, 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 APR 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 |
|---|---|---|---|---|---|---|
| Neff West a 9-4 O-9-22822 | Spraberry (Trend Area) | Diamondback E&P LLC | 2 | 369K | 862K | Oct 2024 – Apr 2026 |
Oil, barrels lease total
Last 12 months 203,694 · prior 12 165,553(+23%)
Gas, mcf lease total
Last 12 months 614,621 · prior 12 247,608(+148%)
Chain of custody
Every operator that reported production on this well's lease, in order.
- 1De IV Operating, LLCDec 2024 → Apr 2025
- 2Diamondback E&P LLCMay 2025 → Apr 2026
Permits
| Permit | Type | Operator | Received | Issued | Spud | Depth |
|---|---|---|---|---|---|---|
| 896309-98 | Drill | De IV Operating, LLC | Jan 30, 2024 | Jan 8, 2024 | Jun 16, 2024 | 10,555 |
| 896309-99 | Drill | De IV Operating, LLC | Jan 4, 2024 | Jan 8, 2024 | Jun 15, 2024 | 10,555 |
Completions
| Completed | Lease | Field | Operator | Status | Depth |
|---|---|---|---|---|---|
| Dec 22, 2024 | Neff West a 9-4 O-9-22822 | Spraberry (Trend Area) | Diamondback E&P LLC | Producing | 9,746 |
Formation tops
As filed on W-2/G-1. Subsea from 2,831 ft elevation.Download CSV →
| Formation | MD ft | Subsea |
|---|---|---|
| Yates | 2,680 | 151 |
| Grayburg | 4,562 | -1,731 |
| San AndresSAN ANDRES - SALTWATER FLOW | 4,725 | -1,894 |
| Spraberry | 7,689 | -4,858 |
| Wolfcamp | 9,154 | -6,323 |
| Devonian | — | — |
| Ellenburger | — | — |
| Fusselman | — | — |
| Strawn | — | — |
Perforations
Perforated and open-hole intervals.
| From | To | Type |
|---|---|---|
| 9,933 | 20,214 | Perforated |
Casing
Strings as reported, shallowest first.
| Casing in | Set at | Hole in | Cement |
|---|---|---|---|
| 13.375 | 500 | 17.5 | 350 S |
| 9.625 | 9,154 | 12.25 | 2,080 S |
| 5.5 | 20,315 | 8.5 | 2,413 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 | Mar 3, 2025 | Feb 5, 2025 | — |
| 00 | Dec 9, 2024 | Nov 12, 2024 | Yes |
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 42-461-42645 → W-2, G-1, plugging reports, as PDFs
- Completion packets for 42-461-42645 → scanned completion filings
Log images filed since 2004 open from the RRC's log search for this well; none are loaded here for it. The University Lands library has no per-well link: then paste it into its search.
Nearby wells and their tops
NEAREST 8 LOCATED WELLS WITH TOPS · WITHIN 16 KM
Draw a cross-section
This well's tops beside its 5 nearest neighbors, subsea-aligned so they line up regardless of surface terrain.
Neff West B 9-442-461-42647
0.0 KM · De IV Operating, LLC · Section with this well →
| Yates | 2,683 | 148 |
| Grayburg | 4,586 | -1,755 |
| San Andres | 4,749 | -1,918 |
| Spraberry | 7,692 | -4,861 |
| Wolfcamp | 9,156 | -6,325 |
| Strawn | — | |
| Devonian | — | |
| Ellenburger | — |
9 TOPS · FIRST 8
Neff West a 9-442-461-42646
0.0 KM · De IV Operating, LLC · Section with this well →
| Yates | 2,670 | 161 |
| Grayburg | 4,556 | -1,725 |
| San Andres | 4,724 | -1,893 |
| Spraberry | 7,692 | -4,861 |
| Wolfcamp | 9,158 | -6,327 |
| Ellenburger | — | |
| Fusselman | — | |
| Strawn | — |
9 TOPS · FIRST 8
Neff West D 9-442-461-42648
0.0 KM · De IV Operating, LLC · Section with this well →
| Yates | 2,682 | 149 |
| Grayburg | 4,597 | -1,766 |
| San Andres | 4,754 | -1,923 |
| Spraberry | 7,693 | -4,862 |
| Wolfcamp | 9,161 | -6,330 |
| Ellenburger | — | |
| Strawn | — | |
| Devonian | — |
9 TOPS · FIRST 8
Neff West D 9-442-461-42649
0.0 KM · De IV Operating, LLC · Section with this well →
| Yates | 2,690 | 142 |
| Grayburg | 4,630 | -1,798 |
| San Andres | 4,777 | -1,945 |
| Spraberry | 7,696 | -4,864 |
| Wolfcamp | 9,166 | -6,334 |
| Devonian | — | |
| Ellenburger | — | |
| Fusselman | — |
9 TOPS · FIRST 8
Cricket TXL A142-461-42820
0.2 KM · COG Operating LLC · Section with this well →
| Yates | 745 | 2,085 |
| Grayburg | 4,061 | -1,231 |
| San Andres | 4,753 | -1,923 |
| Spraberry | 6,842 | -4,012 |
| Devonian | — | |
| Ellenburger | — | |
| Fusselman | — | |
| Strawn | — |
9 TOPS · FIRST 8
Cricket TXL A242-461-42821
0.2 KM · COG Operating LLC · Section with this well →
| Yates | 2,682 | 148 |
| Grayburg | 4,063 | -1,233 |
| San Andres | 4,756 | -1,926 |
| Spraberry | 6,843 | -4,013 |
| Wolfcamp | — | |
| Devonian | — | |
| Ellenburger | — | |
| Fusselman | — |
9 TOPS · FIRST 8
Cricket TXL A342-461-42824
0.2 KM · COG Operating LLC · Section with this well →
| Yates | 744 | 2,086 |
| Grayburg | 4,093 | -1,263 |
| San Andres | 4,790 | -1,960 |
| Spraberry | 6,853 | -4,023 |
| Fusselman | — | |
| Ellenburger | — | |
| Strawn | — | |
| Wolfcamp | — |
9 TOPS · FIRST 8
Cricket TXL A442-461-42826
0.2 KM · COG Operating LLC · Section with this well →
| Yates | 2,683 | 147 |
| Grayburg | 4,098 | -1,268 |
| San Andres | 4,796 | -1,966 |
| Spraberry | 6,854 | -4,024 |
| Wolfcamp | — | |
| Ellenburger | — | |
| Devonian | — | |
| Fusselman | — |
9 TOPS · FIRST 8
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/46142645, documented in the API reference.