42-461-31812

Final Completion

UPTON X FEE

UPTON County · District 7 · ENDEAVOR ENERGY RESOURCES L.P. · PERSEUS (WOLFCAMP)

Permits

Max Depth

13,500 ft

First Permit

1981-09-21

Latest Activity

2015-12-08

Lifespan

34 yrs

Regulatory Status

Schedule

OFF SCHEDULE

Completion

1981-12-18

Shut-In

—

Plugged

—

EWA / Production operator mismatch

Scheduling: ENDEAVOR ENERGY RESOURCES L.P. ≠ Production: DIAMONDBACK E&P LLC (reported 2026-04)

Resolved via: production → DIAMONDBACK E&P LLC

Production Summary

Cum Oil

— bbl

Cum Gas

— mcf

First Production

1993-01

Last Production

2026-07

Operator History

Chain of Custody

TEXACO E & P INC. 1993-1995→ APACHE CORPORATION 1995-1996→ STEPHENS, AUTRY C. 1996-2000→ ENDEAVOR ENERGY RESOURCES L.P. 2000-2024→ DIAMONDBACK E&P LLC 2025-2026

Lease Production

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

Formation Tops (3) Elevation 2,879 ft (GR)

CSV

Formation	Top Depth (MD)	Subsea (+above / −below SL)
SAN ANDRES	4,750 ft	-1,871 ft
SPRABERRY	7,725 ft	-4,846 ft
STRAWN	10,397 ft	-7,518 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
9,340–10,025 ft	Perforated
10,012–10,025 ft	Perforated

Casing (4)

Size	Set Depth	Cement
16"	380 ft	675 sx
10.75"	4,777 ft	4,550 sx
7.625"	9,305 ft	675 sx
2.875"	9,818 ft	—

Permit History (2)

#811821 Field Transfer Final Completion

UPTON 'X' FEE · 13,500 ft

2015-12-08

Spud 1981-09-22

#133802 Drill Final Completion

UPTON "X" FEE · 13,250 ft

1981-09-21

Applications (2)

#811821 A ENDEAVOR ENERGY RESOURCES L.P.

received 2015-11-09

#133802 A TEXACO INC.

received 1981-09-21

Records & Logs

2 completion filings on record.

W-2/G-1 2015-12-10

W-2/G-1 1982-01-18

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.

No GPS coordinates yet

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

Well Details

Well Number: 1
Max Depth: 13,500 ft
Drill Type: Vertical
County: UPTON
District: 7
Operator: ENDEAVOR ENERGY RESOURCES L.P.
Completed: 1981-12-18

Operator

Name: ENDEAVOR ENGY RES L.P
Location: MIDLAND
P-5 Status: Active (filed 2026-06-12)
Cum Oil (all leases): 507,205,629 bbl
Cum Gas (all leases): 70,424,421 mcf
Total Permits: 6,190