42-003-48505

Horizontal

UNIVERSITY 5-35 N4

ANDREWS County · District 10 · PIEDRA OPERATING, LLC

Permits

Max Depth

9,630 ft

First Permit

2022-01-25

Latest Activity

2022-01-25

Lifespan

< 1 yr

Regulatory Status

Schedule

OFF SCHEDULE

Completion

—

Shut-In

—

Plugged

—

Formation Tops (10) Elevation 2,987 ft (GL)

CSV

Formation	Top Depth (MD)	Subsea (+above / −below SL)
CLEARFORK (Clear Fork)	7,026 ft	-4,039 ft
SPRABERRY	8,538 ft	-5,551 ft
CANYON	—	—
DEAN	—	—
LEON	—	—
PENNSYLVANIAN	—	—
PERMIAN DETRITAL (Permian (undifferentiated))	—	—
TUBB	—	—
WICHITA ALBANY (Wichita-Albany)	—	—
WOLFCAMP	—	—

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

✓ 42-003-48503 UNIVERSITY 5-35 N2 · PIEDRA OPERATING, LLC

0.0 mi

Seven Rivers 3,512'Queen 4,215'Grayburg 4,798'San Andres 5,028'Clear Fork 7,023'Tubb —Permian (undifferentiated) —Yates —Glorieta —Holt —

✓ 42-003-48502 UNIVERSITY 5-35 N1 · PIEDRA OPERATING, LLC

0.0 mi

Seven Rivers 3,513'Queen 4,215'Grayburg 4,798'San Andres 5,028'Clear Fork 7,023'Tubb —LEON —Glorieta —Holt —Permian (undifferentiated) —Wichita-Albany —Yates —

✓ 42-003-48506 UNIVERSITY 5-35 N5 · PIEDRA OPERATING, LLC

0.0 mi

Seven Rivers 3,513'Queen 4,215'Grayburg 4,798'San Andres 5,028'Clear Fork 7,023'Yates —Glorieta —Holt —Tubb —Permian (undifferentiated) —

✓ 42-003-48504 UNIVERSITY 5-35 N3 · PIEDRA OPERATING, LLC

0.0 mi

Seven Rivers 3,514'Queen 4,216'Grayburg 4,799'San Andres 5,029'Clear Fork 7,024'Tubb —Permian (undifferentiated) —Holt —Yates —Glorieta —

✓ 42-003-48507 UNIVERSITY 5-35 N6 · PIEDRA OPERATING, LLC

0.0 mi

Seven Rivers 3,514'Queen 4,216'Grayburg 4,800'San Andres 5,030'Clear Fork 7,025'Permian (undifferentiated) —Glorieta —Holt —Tubb —Yates —

✓ 42-003-48098 UNIVERSITY 5-38 C · PIEDRA OPERATING, LLC

0.2 mi

Yates 2,800'San Andres 3,800'Grayburg 4,500'Clear Fork 7,042'Spraberry 8,500'Wolfcamp 9,700'Clear Fork —Tubb —Glorieta —Queen —Holt —Seven Rivers — +1 more

✓ 42-003-48097 UNIVERSITY 5-38 B · PIEDRA OPERATING, LLC

0.2 mi

Yates 2,800'San Andres 3,800'Grayburg 4,500'Clear Fork 7,037'Spraberry 8,500'Wolfcamp 9,550'Clear Fork —Seven Rivers —Glorieta —Queen —Holt —Tubb — +1 more

✓ 42-003-48038 UNIVERSITY 5-38A · PIEDRA OPERATING, LLC

0.2 mi

Yates 2,800'San Andres 3,800'Grayburg 4,500'Holt —Seven Rivers —Permian (undifferentiated) —Clear Fork —Tubb —Glorieta —Queen —

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)

Interval	Type
9,955–17,711 ft	Perforated

Casing (3)

Size	Set Depth	Cement
13.375"	1,874 ft	1,500 sx
9.625"	7,525 ft	1,565 sx
5.5"	17,825 ft	3,050 sx

Permit History (2)

#876228 Drill

UNIVERSITY 5-35 N4 · 9,600 ft

2022-01-25

Spud 2022-02-05

#876228 Drill

UNIVERSITY 5-35 N4 · 9,630 ft

2022-01-25

Spud 2022-02-05

Applications (2)

#876228 A OVINTIV USA INC.

received 2026-02-04

#876228 A PIEDRA OPERATING, LLC

received 2022-01-19

Records & Logs

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

W-2/G-1 2025-12-16 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.

Google Maps → Explorer Map →

Lat 32.428102

Lon -102.312447

Well Details

Well Number: H 4LS
Max Depth: 9,630 ft
Drill Type: Horizontal
County: ANDREWS
District: 10
Operator: PIEDRA OPERATING, LLC

Operator

Name: PIEDRA OPER, LLC
Location: DENVER
P-5 Status: Active (filed 2026-03-18)
Cum Oil (all leases): 12,141,096 bbl
Cum Gas (all leases): 682 mcf
Total Permits: 279