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WILLIS 41

MIDLAND County · District 8 · DIAMONDBACK E&P LLC · SPRABERRY (TREND AREA)

Permits

Max Depth

12,000 ft

First Permit

2004-01-06

Latest Activity

2017-03-09

Lifespan

13 yrs

Regulatory Status

Schedule

ON SCHEDULE

Completion

2004-06-01

Shut-In

—

Plugged

—

P-5 Org Status: X

EWA / Production operator mismatch

Scheduling: DIAMONDBACK E&P LLC ≠ Production: ENDEAVOR ENERGY RESOURCES L.P. (reported 2024-12)

EWA / Permit operator mismatch

Scheduling: DIAMONDBACK E&P LLC ≠ Permit: ENDEAVOR ENERGY RESOURCES L.P.

Resolved via: scheduling → DIAMONDBACK E&P LLC

Production Summary

Cum Oil

— bbl

Cum Gas

— mcf

First Production

2003-08

Last Production

2026-07

Operator History

originally filed by ENDEAVOR ENERGY RESOURCES L.P. — asset transferred

Lease Production

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

Oil

production & DCA →

Formation Tops (10) Elevation 2,713 ft (GR)

CSV

Formation	Top Depth (MD)	Subsea (+above / −below SL)
SPRABERRY	7,425 ft	-4,712 ft
UPPER SPRABERRY (Spraberry)	7,425 ft	-4,712 ft
LOWER SPRABERRY (Spraberry)	7,985 ft	-5,272 ft
DEAN	8,775 ft	-6,062 ft
WOLFCAMP	9,325 ft	-6,612 ft
STRAWN	10,375 ft	-7,662 ft
BEND LIME (Bend)	10,565 ft	-7,852 ft
ATOKA SHALE (Atoka)	10,810 ft	-8,097 ft
ATOKA	10,875 ft	-8,162 ft
DEVONIAN	11,500 ft	-8,787 ft

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 ↗

Perforations (2)

Interval	Type
8,056–9,921 ft	Perforated
8,056–11,623 ft	Perforated

Casing (3)

Size	Set Depth	Cement
12.75"	316 ft	320 sx
8.625"	4,985 ft	425 sx
4.5"	11,700 ft	1,270 sx

Permit History (2)

#823796 Recompletion Final Completion

WILLIS '41' · 11,700 ft

2017-03-09

Spud 2004-05-20

#540418 Drill Final Completion

WILLIS "41" · 12,000 ft

2004-01-06

Spud 2004-01-14

Applications (2)

#823796 A ENDEAVOR ENERGY RESOURCES L.P.

received 2017-02-27

#540418 A ENDEAVOR ENERGY RESOURCES L.P.

received 2004-01-06

Records & Logs

3 completion filings on record · 1 with log images at RRC.

W-2/G-1 2017-03-15

W-2/G-1 2004-06-21 log on file

W-2/G-1 2004-08-16

Completion packets + logs ↗ Wellbore filings ↗

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

No GPS coordinates yet

Coordinates come from the RRC GIS backfill and usually appear within days of permit issuance. Located in MIDLAND County.

Well Details

Well Number: 3
Max Depth: 12,000 ft
Drill Type: Vertical
County: MIDLAND
District: 8
Operator: DIAMONDBACK E&P LLC
Completed: 2004-06-01

Operator

Name: DIAMONDBACK E&P LLC
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: 4,977