42-461-42655

PRODUCING Horizontal

NEFF EAST J 9-45

UPTON County · District 7 · DIAMONDBACK E&P LLC · SPRABERRY (TREND AREA)

Permits

4

Max Depth

10,605 ft

First Permit

2024-01-09

Latest Activity

2024-01-09

Lifespan

< 1 yr

Regulatory Status

Schedule

ON SCHEDULE

Completion

2025-07-12

Shut-In

Plugged

P-5 Org Status: X

!

EWA / Permit operator mismatch

Scheduling: DIAMONDBACK E&P LLC ≠ Permit: DE IV OPERATING, LLC

Resolved via: productionDIAMONDBACK E&P LLC

Production Summary

Cum Oil

bbl

Cum Gas

mcf

First Production

2025-07

Last Production

2026-07

Operator History

originally filed by DE IV OPERATING, LLC — asset transferred

Lease Production

Production is reported at the lease level. View production data, decline curves, and history on the lease page.

Formation Tops (10) Elevation 2,828 ft (GL)

CSV
FormationTop Depth (MD)Subsea (+above / −below SL)
GRAYBURG 4,470 ft-1,642 ft
SAN ANDRES - SALTWATER FLOW (San Andres)4,793 ft-1,965 ft
CLEARFORK (Clear Fork)6,833 ft-4,005 ft
SPRABERRY 7,682 ft-4,854 ft
WOLFCAMP 9,175 ft-6,347 ft
DEVONIAN
ELLENBURGER
FUSSELMAN
STRAWN
YATES

As reported by operators on W-2/G-1 completion filings (RRC wellbore records). Depths are measured depth; names appear as filed. Subsea = reported elevation − measured depth (negative = below sea level; vertical wellbores only). View filings & logs at RRC ↗

Offset Well Tops (nearest 8 wells with tops)

What nearby completed wells reported.

Cross-section
42-461-42654 NEFF EAST I 9-45 · DE IV OPERATING, LLC
0.0 mi
Yates 2,640'Grayburg 4,484'San Andres 4,757'Spraberry 7,723'Wolfcamp 8,912'Devonian Strawn Fusselman Ellenburger
42-461-42656 NEFF EAST J 9-45 · DE IV OPERATING, LLC
0.0 mi
San Andres 5,253'Glorieta 6,060'Clear Fork 6,867'Spraberry 7,719'Wolfcamp 9,190'Grayburg Fusselman Devonian Strawn Yates
42-461-42657 NEFF EAST J 9-45 · DE IV OPERATING, LLC
0.0 mi
Yates 2,639'Grayburg 4,482'San Andres 4,753'Clear Fork 6,857'Spraberry 7,711'Fusselman Ellenburger Devonian Wolfcamp Strawn
42-461-42658 NEFF EAST K 9-45 · DE IV OPERATING, LLC
0.0 mi
Yates 2,659'Grayburg 4,484'San Andres 4,813'Spraberry 7,699'Fusselman Yates Strawn Ellenburger Devonian Wolfcamp
42-461-42659 NEFF EAST K 9-45 · DE IV OPERATING, LLC
0.0 mi
Yates 2,683'Grayburg 4,099'San Andres 5,288'Clear Fork 6,782'Spraberry 7,576'Wolfcamp 9,175'Strawn Ellenburger Devonian Fusselman
42-461-42660 NEFF EAST L 9-45 · DE IV OPERATING, LLC
0.1 mi
Yates 2,741'Grayburg 4,101'San Andres 5,507'Spraberry 7,634'Ellenburger Fusselman Wolfcamp Devonian Strawn
42-461-42661 NEFF EAST M 9-45 · DE IV OPERATING, LLC
0.1 mi
Strawn Yates San Andres Grayburg Fusselman Ellenburger Spraberry Devonian Wolfcamp
42-461-42663 NEFF EAST M 9-45 · DE IV OPERATING, LLC
0.1 mi
Fusselman Ellenburger Spraberry Devonian Wolfcamp Strawn Grayburg Yates San Andres

Nearest wells within 10 mi (surface locations). Click wells to select them, then open the cross-section to compare tops side by side (max 6 wells per section, including this one).

Perforations (1)

IntervalType
9,716–25,421 ftPerforated

Casing (3)

SizeSet DepthCement
13.375"501 ft445 sx
9.625"9,146 ft1,520 sx
6"25,475 ft2,340 sx

Permit History (4)

Applications (4)

#896327 A DE IV OPERATING, LLC
received 2024-12-03
#896327 A DE IV OPERATING, LLC
received 2024-06-05
#896327 A DE IV OPERATING, LLC
received 2024-01-29
#896327 A DE IV OPERATING, LLC
received 2024-01-04

Records & Logs

1 completion filing on record · 1 with log images at RRC.

W-2/G-1 2025-10-20 log on file
Completion packets + logs ↗ Wellbore filings ↗

Completion packets open directly (post-2011 filings include attached logs). Log images and the UL library can't be deep-linked — clicking copies the API for you to paste.

Lat 31.589445
Lon -102.084675

Well Details

Well Number
4209H
Max Depth
10,605 ft
Drill Type
Horizontal
County
UPTON
District
7
Completed
2025-07-12

Operator

Location
MIDLAND
P-5 Status
X (filed 2026-05-04)
Cum Oil (all leases)
986,290,193 bbl
Cum Gas (all leases)
41,995,553 mcf
Activities
GTHS/C, GTHS/O, OPRS/G, OPRS/O
Total Permits
4,969