42-329-40988

PRODUCING Horizontal

TUBB 21 U UNIT

MIDLAND County · District 8 · PIONEER NATURAL RES. USA INC. · SPRABERRY (TREND AREA)

Permits

2

Max Depth

11,000 ft

First Permit

2016-05-31

Latest Activity

2016-05-31

Lifespan

< 1 yr

Regulatory Status

Schedule

ON SCHEDULE

Completion

2017-08-29

Shut-In

Plugged

P-5 Org Status: Active

Production Summary

Cum Oil

bbl

Cum Gas

mcf

First Production

2017-01

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 (18) Elevation 2,828 ft (KB)

CSV
FormationTop Depth (MD)Subsea (+above / −below SL)
SANTA ROSA 728 ft+2,100 ft
SANTA ROSA 895 ft+1,933 ft
YATES 2,767 ft+61 ft
YATES 2,809 ft+19 ft
SEVEN RIVERS 3,060 ft-232 ft
SEVEN RIVERS 3,134 ft-306 ft
QUEEN 3,817 ft-989 ft
QUEEN 3,910 ft-1,082 ft
GRAYBURG 4,431 ft-1,603 ft
GRAYBURG 4,551 ft-1,723 ft
SAN ANDRES - HIGH FLOWS, H2S, CO (San Andres)4,563 ft-1,735 ft
SAN ANDRES - HIGH FLOWS, H2S, CO (San Andres)4,731 ft-1,903 ft
CLEARFORK (Clear Fork)6,990 ft-4,162 ft
CLEARFORK (Clear Fork)6,994 ft-4,166 ft
SPRABERRY 6,994 ft-4,166 ft
SPRABERRY 7,843 ft-5,015 ft
SPRABERRY UPPER-DEAN (Spraberry)9,184 ft-6,356 ft
GLORIETA

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
42-329-40987 TUBB 21 L UNIT · PIONEER NATURAL RES. USA, INC.
0.0 mi
Santa Rosa 894'Yates 1,320'Seven Rivers 3,025'Queen 3,777'Grayburg 4,399'San Andres 4,531'Clear Fork 6,963'Spraberry 7,844'Spraberry 9,192'Wolfcamp 9,385'Glorieta
42-329-40986 TUBB 21 U UNIT · PIONEER NATURAL RES. USA, INC.
0.0 mi
Santa Rosa 912'Yates 2,775'Seven Rivers 3,061'Queen 3,809'Grayburg 4,420'San Andres 4,554'Clear Fork 6,991'Spraberry 7,851'Spraberry 9,196'Grayburg 44,250'Glorieta
42-329-40985 TUBB 21 L UNIT · PIONEER NATURAL RES. USA, INC.
0.0 mi
Santa Rosa 923'Yates 2,766'Yates 2,767'Seven Rivers 3,074'Seven Rivers 3,075'Queen 3,810'Queen 3,811'Grayburg 4,415'San Andres 4,562'San Andres 4,563'Clear Fork 6,999'Spraberry 7,844' +3 more
42-329-40984 TUBB 21 U UNIT · PIONEER NATURAL RES. USA, INC.
0.0 mi
Santa Rosa 915'Yates 2,754'Seven Rivers 3,058'Queen 3,810'Grayburg 4,398'San Andres 4,555'Clear Fork 6,994'Spraberry 7,850'Spraberry 9,195'Spraberry Spraberry Santa Rosa +7 more
42-329-40983 TUBB 21 L UNIT · PIONEER NATURAL RES. USA, INC.
0.0 mi
Santa Rosa 908'Yates 2,747'Seven Rivers 3,053'Queen 3,835'Grayburg 4,412'San Andres 4,577'Clear Fork 6,993'Spraberry 7,848'Spraberry 9,201'Glorieta
42-329-45457 TUBB-VAUGHN 21G · PIONEER NATURAL RES. USA, INC.
0.0 mi
Santa Rosa 1,113'Rustler 1,745'Yates 2,754'Seven Rivers 3,049'Queen 3,800'Grayburg 4,339'San Andres 4,555'Clear Fork 6,989'Spraberry 7,845'Mississippian Devonian CAMBRIAN +4 more
42-329-45458 TUBB-VAUGHN 21H · PIONEER NATURAL RES. USA, INC.
0.0 mi
Santa Rosa 1,113'Rustler 1,745'Yates 2,753'Seven Rivers 3,045'Queen 3,797'Grayburg 4,336'San Andres 4,555'Clear Fork 6,984'Spraberry 7,844'Glorieta
42-329-45459 TUBB-VAUGHN 21I · PIONEER NATURAL RES. USA, INC.
0.0 mi
Santa Rosa 1,113'Rustler 1,745'Yates 2,750'Seven Rivers 3,043'Queen 3,802'Grayburg 4,343'San Andres 4,554'Clear Fork 6,984'Spraberry 7,839'Glorieta

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
9,787–19,545 ftPerforated

Casing (4)

SizeSet DepthCement
13.375"1,745 ft1,778 sx
9.625"7,732 ft804 sx
5.5"19,537 ft726 sx
4.5"19,675 ft726 sx

Permit History (2)

Applications (2)

#815950 A PIONEER NATURAL RES. USA, INC.
received 2017-06-13
#815950 A PIONEER NATURAL RES. USA, INC.
received 2016-05-27

Records & Logs

2 completion filings on record · 2 with log images at RRC.

W-2/G-1 2017-12-18 log on file
W-2/G-1 2017-06-28 log on file

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.

Lat 31.934260
Lon -102.091680

Well Details

Well Number
6H
Max Depth
11,000 ft
Drill Type
Horizontal
County
MIDLAND
District
8
Completed
2017-08-29

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
15,400