42-297-35824

Final Completion Horizontal

THREE SISTERS 01

LIVE OAK County · District 2 · PIONEER NATURAL RES. USA, INC.

Permits

3

Max Depth

26,000 ft

First Permit

2015-12-16

Latest Activity

2018-09-30

Lifespan

3 yrs

Regulatory Status

Schedule

OFF SCHEDULE

Completion

Shut-In

Plugged

Production Summary

Cum Oil

bbl

Cum Gas

mcf

First Production

2017-09

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 (16) Elevation 246 ft (GL)

CSV
FormationTop Depth (MD)Subsea (+above / −below SL)
HOCKLEY - DISPOSAL560 ft-314 ft
JACKSON-YEGUA - DISPOSAL (Jackson)1,261 ft-1,015 ft
JACKSON-YEGUA - DISPOSAL (Jackson)1,262 ft-1,016 ft
COOK MOUNTAIN 2,639 ft-2,393 ft
COOK MOUNTAIN 2,640 ft-2,394 ft
QUEEN CITY 3,549 ft-3,303 ft
QUEEN CITY 3,550 ft-3,304 ft
WILCOX 5,136 ft-4,890 ft
WILCOX 5,137 ft-4,891 ft
AUSTIN CHALK 12,428 ft-12,182 ft
AUSTIN CHALK 12,429 ft-12,183 ft
EAGLE FORD - H2S (Eagle Ford)12,559 ft-12,313 ft
EAGLE FORD - H2S (Eagle Ford)12,560 ft-12,314 ft
EDWARDS - H2S (Edwards)
FRIO - DISPOSAL (Frio)
SLIGO - H2S (Sligo)

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
42-297-35785 THREE SISTERS 01 · PIONEER NATURAL RES. USA, INC.
0.0 mi
HOCKLEY - DISPOSAL 548'Jackson 1,263'Cook Mountain 2,654'Queen City 3,588'Wilcox 5,107'Austin Chalk 12,397'Eagle Ford 12,568'Sligo Edwards Frio
42-297-35934 THREE SISTERS 01 · PIONEER NATURAL RES. USA, INC.
0.0 mi
HOCKLEY - DISPOSAL 559'Jackson 1,260'Cook Mountain 2,619'Queen City 3,559'Wilcox 5,108'Austin Chalk 12,428'Eagle Ford 12,550'Edwards Frio Sligo
42-297-36122 THREE SISTERS 01 · ENSIGN OPERATING LLC
0.2 mi
Wilcox 4,951'Austin Chalk 12,563'Eagle Ford 12,596'HOCKLEY - DISPOSAL Jackson Sligo Cook Mountain Edwards Frio Queen City
42-297-36123 THREE SISTERS 01 · ENSIGN OPERATING LLC
0.2 mi
Wilcox 4,951'Austin Chalk 12,568'Eagle Ford 12,598'Cook Mountain Edwards Frio HOCKLEY - DISPOSAL Queen City Jackson Sligo
42-297-36124 THREE SISTERS 01 · ENSIGN OPERATING LLC
0.2 mi
Wilcox 4,951'Austin Chalk 12,567'Eagle Ford 12,593'Sligo Edwards Jackson Frio Queen City Cook Mountain HOCKLEY - DISPOSAL
42-297-36279 THREE SISTERS 01 · ENSIGN OPERATING LLC
0.5 mi
Queen City 4,839'Wilcox 5,239'Austin Chalk 12,675'Eagle Ford 12,716'Sligo HOCKLEY - DISPOSAL Jackson Cook Mountain Edwards Frio
42-297-36278 THREE SISTERS 01 · ENSIGN OPERATING LLC
0.5 mi
Queen City 4,839'Wilcox 5,239'Austin Chalk 12,672'Eagle Ford 12,704'HOCKLEY - DISPOSAL Jackson Sligo Cook Mountain Edwards Frio
42-297-36277 THREE SISTERS 01 · ENSIGN OPERATING LLC
0.5 mi
Queen City 4,839'Wilcox 5,239'Austin Chalk 12,663'Eagle Ford 12,697'HOCKLEY - DISPOSAL Frio Edwards Jackson Sligo Cook Mountain

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
12,935–22,335 ftPerforated

Casing (2)

SizeSet DepthCement
9.625"6,447 ft2,079 sx
5.5"22,500 ft4,814 sx

Permit History (3)

Applications (3)

#840200 A PIONEER NATURAL RES. USA, INC.
received 2018-08-15
#840200 A PIONEER NATURAL RES. USA, INC.
received 2018-05-17
#812715 A PIONEER NATURAL RES. USA, INC.
received 2015-12-15

Records & Logs

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

W-2/G-1 2020-02-25
W-2/G-1 2019-05-09 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 28.544446
Lon -98.244817

Well Details

Well Number
44H
Max Depth
26,000 ft
Drill Type
Horizontal
County
LIVE OAK
District
2

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