42-173-38980

PRODUCING Horizontal

RILEY 26A

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

Permits

1

Max Depth

9,000 ft

First Permit

2023-07-05

Latest Activity

2023-07-05

Lifespan

< 1 yr

Regulatory Status

Schedule

ON SCHEDULE

Completion

2024-03-19

Shut-In

Plugged

P-5 Org Status: Active

Production Summary

Cum Oil

bbl

Cum Gas

mcf

First Production

2023-10

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 2,732 ft (KB)

CSV
FormationTop Depth (MD)Subsea (+above / −below SL)
SANTA ROSA 1,052 ft+1,680 ft
YATES 2,193 ft+539 ft
SEVEN RIVERS 2,466 ft+266 ft
QUEEN 2,949 ft-217 ft
GRAYBURG 3,412 ft-680 ft
SAN ANDRES - HIGH FLOWS, H2S, CO (San Andres)3,674 ft-942 ft
CLEARFORK (Clear Fork)5,575 ft-2,843 ft
SPRABERRY 6,733 ft-4,001 ft
GLORIETA
RUSTLER

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
42-173-38978 RILEY 26B · PIONEER NATURAL RES. USA, INC.
0.0 mi
Santa Rosa 1,052'Yates 2,191'Seven Rivers 2,468'Queen 2,948'Grayburg 3,413'San Andres 3,675'Clear Fork 5,574'Spraberry 6,730'CAMBRIAN PRECAMBRIAN (UNDIFFERENTIATED) Glorieta Rustler
42-173-38983 RILEY 26Z · PIONEER NATURAL RES. USA, INC.
0.0 mi
Santa Rosa 1,052'Yates 2,193'Seven Rivers 2,471'Queen 2,952'Grayburg 3,414'San Andres 3,678'Clear Fork 5,584'Spraberry 6,732'Glorieta Rustler
42-173-38868 TROPICANA WEST 23-14I · PIONEER NATURAL RES. USA, INC.
0.0 mi
Santa Rosa 817'Rustler 1,337'Yates 2,186'Seven Rivers 2,460'Queen 2,959'Grayburg 3,440'San Andres 3,711'Clear Fork 5,639'Spraberry 6,758'Glorieta
42-173-38875 TROPICANA WEST 23-14J · PIONEER NATURAL RES. USA, INC.
0.0 mi
Santa Rosa 817'Rustler 1,337'Yates 2,185'Seven Rivers 2,461'Queen 2,960'Grayburg 3,429'San Andres 3,698'Clear Fork 5,619'Spraberry 6,746'Glorieta
42-173-38869 TROPICANA WEST 23-14K · PIONEER NATURAL RES. USA, INC.
0.0 mi
Santa Rosa 817'Rustler 1,337'Yates 2,186'Seven Rivers 2,459'Queen 2,953'Grayburg 3,422'San Andres 3,688'Clear Fork 5,617'Spraberry 6,739'Glorieta
42-173-38979 RILEY 26I · PIONEER NATURAL RES. USA, INC.
0.0 mi
Santa Rosa 1,053'Yates 2,164'Seven Rivers 2,456'Queen 2,958'Grayburg 3,410'San Andres 3,724'Clear Fork 5,570'Spraberry 6,734'Rustler Glorieta
42-173-38874 TROPICANA WEST 23-14Y · PIONEER NATURAL RES. USA, INC.
0.0 mi
Santa Rosa 783'Rustler 1,338'Yates 2,192'Seven Rivers 2,473'Queen 2,961'Grayburg 3,427'San Andres 3,702'Clear Fork 5,590'Spraberry 6,750'Glorieta
42-173-38981 RILEY 26H · PIONEER NATURAL RES. USA, INC.
0.0 mi
Santa Rosa 1,053'Yates 2,185'Seven Rivers 2,469'Queen 2,954'Grayburg 3,420'San Andres 3,686'Clear Fork 5,572'Spraberry 6,739'Glorieta Rustler

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
8,627–24,252 ftPerforated

Casing (3)

SizeSet DepthCement
13.375"1,283 ft1,500 sx
9.625"6,094 ft1,665 sx
5.5"24,277 ft1,500 sx

Permit History (1)

Applications (1)

#891017 A PIONEER NATURAL RES. USA, INC.
received 2023-05-31

Records & Logs

2 completion filings on record.

W-2/G-1 2024-05-21
W-2/G-1 2024-03-19

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 31.773748
Lon -101.681991

Well Details

Well Number
127H
Max Depth
9,000 ft
Drill Type
Horizontal
County
GLASSCOCK
District
8
Completed
2024-03-19

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