42-461-43186

PRODUCING Horizontal

BROOK O-1B

UPTON County · District 7 · PIONEER NATURAL RES. USA INC. · SPRABERRY (TREND AREA)

Permits

1

Max Depth

10,922 ft

First Permit

2025-07-07

Latest Activity

2025-07-07

Lifespan

< 1 yr

Regulatory Status

Schedule

ON SCHEDULE

Completion

2026-02-13

Shut-In

Plugged

P-5 Org Status: Active

Production Summary

Cum Oil

bbl

Cum Gas

mcf

First Production

2025-09

Last Production

2026-07

Lease Production

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

Formation Tops (10) Elevation 2,737 ft (KB)

CSV
FormationTop Depth (MD)Subsea (+above / −below SL)
YATES 2,385 ft+352 ft
GRAYBURG 3,912 ft-1,175 ft
SAN ANDRES - SALTWATER FLOW (San Andres)4,119 ft-1,382 ft
CLEARFORK (Clear Fork)6,228 ft-3,491 ft
SPRABERRY 7,133 ft-4,396 ft
WOLFCAMP 8,716 ft-5,979 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
42-461-43189 BROOK UNIT O-1C · PIONEER NATURAL RES. USA, INC.
0.0 mi
Yates 2,383'Grayburg 3,913'San Andres 4,127'Clear Fork 6,225'Spraberry 7,121'Devonian Wolfcamp Strawn Fusselman Ellenburger
42-461-43185 BROOK O-1A · PIONEER NATURAL RES. USA, INC.
0.0 mi
Yates 2,385'Grayburg 3,913'San Andres 4,121'Clear Fork 6,241'Spraberry 7,145'Wolfcamp 8,734'Fusselman Ellenburger Devonian Strawn
42-461-43190 BROOK UNIT O-1D · PIONEER NATURAL RES. USA, INC.
0.0 mi
Yates 2,377'Grayburg 3,914'San Andres 4,130'Clear Fork 6,227'Spraberry 7,124'Wolfcamp Strawn Ellenburger Fusselman Devonian
42-461-43191 BROOK UNIT O-1E · PIONEER NATURAL RES. USA, INC.
0.3 mi
Yates 2,380'Yates 2,383'Grayburg 3,913'Grayburg 3,918'San Andres 4,122'San Andres 4,127'Clear Fork 6,163'Clear Fork 6,225'Spraberry 7,121'Spraberry 7,129'Fusselman Strawn +3 more
42-461-43187 BROOK O-1F · PIONEER NATURAL RES. USA, INC.
0.3 mi
Yates 2,394'Grayburg 3,919'San Andres 4,110'Clear Fork 6,259'Spraberry 7,122'Wolfcamp 8,701'Devonian Strawn Fusselman Ellenburger
42-461-43188 BROOK O-1G · PIONEER NATURAL RES. USA, INC.
0.3 mi
Yates 2,270'Grayburg 3,828'San Andres 4,021'Clear Fork 6,063'Spraberry 6,805'Wolfcamp 8,446'Fusselman Ellenburger Devonian Strawn
42-461-43192 BROOK UNIT O-1H · PIONEER NATURAL RES. USA, INC.
0.3 mi
Yates 2,392'Grayburg 3,910'San Andres 4,115'Clear Fork 6,201'Spraberry 7,091'Fusselman Ellenburger Devonian Wolfcamp Strawn
42-461-40760 BROOK O-2Z · PIONEER NATURAL RES. USA, INC.
1.0 mi
Yates 2,435'Grayburg 4,058'San Andres 4,171'Spraberry 7,170'Dean 8,596'Wolfcamp 8,788'Strawn Fusselman Devonian Ellenburger

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
8,960–27,208 ftPerforated

Casing (3)

SizeSet DepthCement
13.375"1,298 ft1,325 sx
9.625"5,648 ft1,875 sx
5.5"27,233 ft2,005 sx

Permit History (1)

Applications (1)

#908362 A PIONEER NATURAL RES. USA, INC.
received 2025-05-30

Records & Logs

2 completion filings on record.

W-2/G-1 2026-04-14
W-2/G-1 2026-02-05
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 31.494657
Lon -101.843982

Well Details

Well Number
2H
Max Depth
10,922 ft
Drill Type
Horizontal
County
UPTON
District
7
Completed
2026-02-13

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
15,399