42-329-40983

PRODUCING Horizontal

TUBB 21 L UNIT

MIDLAND County · District 8 · PIONEER NATURAL RES. USA INC. · SPRABERRY (TREND AREA) R 40 EXC

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

2017-07-03

Shut-In

Plugged

P-5 Org Status: Active

Production Summary

Cum Oil

bbl

Cum Gas

mcf

First Production

2017-06

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 2,828 ft (KB)

CSV
FormationTop Depth (MD)Subsea (+above / −below SL)
SANTA ROSA 908 ft+1,920 ft
YATES 2,747 ft+81 ft
SEVEN RIVERS 3,053 ft-225 ft
QUEEN 3,835 ft-1,007 ft
GRAYBURG 4,412 ft-1,584 ft
SAN ANDRES - HIGH FLOWS, H2S, CO (San Andres)4,577 ft-1,749 ft
CLEARFORK (Clear Fork)6,993 ft-4,165 ft
SPRABERRY 7,848 ft-5,020 ft
SPRABERRY UPPER-DEAN (Spraberry)9,201 ft-6,373 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
42-329-40984 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'Glorieta Santa Rosa Clear Fork +7 more
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
42-329-40986 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
42-329-40987 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
42-329-40988 TUBB 21 U UNIT · PIONEER NATURAL RES. USA, INC.
0.0 mi
Santa Rosa 728'Santa Rosa 895'Yates 2,767'Yates 2,809'Seven Rivers 3,060'Seven Rivers 3,134'Queen 3,817'Queen 3,910'Grayburg 4,431'Grayburg 4,551'San Andres 4,563'San Andres 4,731' +6 more
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'Ellenburger Fusselman Glorieta +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
9,975–20,032 ftPerforated

Casing (4)

SizeSet DepthCement
13.375"1,743 ft1,738 sx
9.625"6,506 ft1,229 sx
5.5"20,016 ft781 sx
4.5"20,127 ft781 sx

Permit History (2)

Applications (2)

#815902 A PIONEER NATURAL RES. USA, INC.
received 2017-06-13
#815902 A PIONEER NATURAL RES. USA, INC.
received 2016-05-25

Records & Logs

2 completion filings on record · 1 with log images at RRC.

W-2/G-1 2017-10-03 log on file
W-2/G-1 2017-09-11

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 31.934187
Lon -102.091991

Well Details

Well Number
1H
Max Depth
11,000 ft
Drill Type
Horizontal
County
MIDLAND
District
8
Completed
2017-07-03

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