← Wells

42-461-43553

Horizontal

BROOK N-12D

UPTON County · District 9 · PIONEER NATURAL RES. USA, INC.

Permits

1

Max Depth

10,714 ft

First Permit

2026-03-13

Latest Activity

2026-03-13

Lifespan

< 1 yr

Regulatory Status

Schedule

OFF SCHEDULE

Completion

—

Shut-In

—

Plugged

—

Formation Tops (10) Elevation 2,754 ft (KB)

CSV
FormationTop Depth (MD)Subsea (+above / −below SL)
YATES 2,419 ft+335 ft
GRAYBURG 4,015 ft-1,261 ft
SAN ANDRES - SALTWATER FLOW (San Andres)4,238 ft-1,484 ft
CLEARFORK (Clear Fork)6,309 ft-3,555 ft
SPRABERRY 7,155 ft-4,401 ft
WOLFCAMP 8,731 ft-5,977 ft
DEVONIAN ——
ELLENBURGER ——
FUSSELMAN ——
STRAWN ——

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
✓ 42-461-43552 BROOK N-12C · PIONEER NATURAL RES. USA, INC.
0.0 mi
Yates 2,417'Grayburg 4,017'San Andres 4,245'Clear Fork 6,311'Spraberry 7,164'Wolfcamp 8,740'Ellenburger —Devonian —Strawn —Fusselman —
✓ 42-461-43554 BROOK N-12E · PIONEER NATURAL RES. USA, INC.
0.0 mi
Yates 2,418'Grayburg 4,010'San Andres 4,232'Clear Fork 6,306'Spraberry 7,167'Wolfcamp 8,731'Strawn —Devonian —Ellenburger —Fusselman —
✓ 42-461-43555 BROOK N-12F · PIONEER NATURAL RES. USA, INC.
0.0 mi
Yates 2,417'Grayburg 3,998'San Andres 4,240'Clear Fork 6,301'Spraberry 7,168'Wolfcamp 8,737'Fusselman —Ellenburger —Devonian —Strawn —
✓ 42-461-43551 BROOK N-12B · PIONEER NATURAL RES. USA, INC.
0.0 mi
Yates 2,409'Grayburg 4,023'San Andres 4,242'Clear Fork 6,308'Spraberry 7,155'Wolfcamp 8,731'Strawn —Ellenburger —Devonian —Fusselman —
✓ 42-461-43550 BROOK N-12A · PIONEER NATURAL RES. USA, INC.
0.0 mi
Yates 2,414'Grayburg 4,038'San Andres 4,252'Clear Fork 6,316'Spraberry 7,167'Wolfcamp 8,738'Fusselman —Strawn —Ellenburger —Devonian —
✓ 42-461-43570 BROOK UNIT N-12L · PIONEER NATURAL RES. USA, INC.
0.3 mi
Yates 2,417'Grayburg 4,042'San Andres 4,257'Clear Fork 6,321'Spraberry 7,189'Fusselman —Ellenburger —Devonian —Strawn —Wolfcamp —
✓ 42-461-41139 PEMBROOK UNIT · PIONEER NATURAL RES. USA, INC.
0.5 mi
Yates 2,414'Grayburg 4,130'San Andres 4,248'Spraberry 7,186'Dean 8,602'Devonian —Fusselman —Ellenburger —Dean —Strawn —Wolfcamp —
✓ 42-461-41137 PEMBROOK UNIT · PIONEER NATURAL RES. USA, INC.
0.5 mi
Yates 2,415'Grayburg 4,135'San Andres 4,264'Spraberry 7,199'Dean 8,602'Wolfcamp —Ellenburger —Devonian —Strawn —Fusselman —

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).

Casing (3)

SizeSet DepthCement
13.375"1,290 ft1,485 sx
9.625"5,612 ft2,160 sx
5.5"25,211 ft1,930 sx

Permit History (1)

#914015 Drill

BROOK N-12D · 10,714 ft

2026-03-13

Applications (1)

#914015 A PIONEER NATURAL RES. USA, INC.
received 2026-03-09

Records & Logs

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

W-2/G-1 2026-08-07 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 31.499633
Lon -101.897936

Well Details

Well Number
4H
Max Depth
10,714 ft
Drill Type
Horizontal
County
UPTON
District
9
Operator
PIONEER NATURAL RES. USA, INC.

Operator

Location
Y SPRING
P-5 Status
Active (filed 2025-08-01)
Cum Oil (all leases)
1,771,882,421 bbl
Cum Gas (all leases)
1,763,727,021 mcf
Activities
CSGD/G, CSGD/P, G/PUR, GTHS/G, GTHS/O, OPRS/G, OPRS/O
Total Permits
15,468