42-297-36278

PRODUCING Horizontal

THREE SISTERS 01

LIVE OAK County · District 2 · MARATHON OIL EF LLC · SUGARKANE (EAGLE FORD)

Permits

1

Max Depth

22,500 ft

First Permit

2022-07-21

Latest Activity

2022-07-21

Lifespan

< 1 yr

Regulatory Status

Schedule

ON SCHEDULE

Completion

2023-06-16

Shut-In

Plugged

P-5 Org Status: Active

!

EWA / Permit operator mismatch

Scheduling: MARATHON OIL EF LLC ≠ Permit: ENSIGN OPERATING LLC

Resolved via: productionMARATHON OIL EF LLC

Production Summary

Cum Oil

bbl

Cum Gas

mcf

First Production

2023-03

Last Production

2026-07

Operator History

originally filed by ENSIGN OPERATING LLC — asset transferred

Lease Production

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

Formation Tops (10) Elevation 199 ft (GL)

CSV
FormationTop Depth (MD)Subsea (+above / −below SL)
QUEEN CITY 4,839 ft-4,640 ft
WILCOX 5,239 ft-5,040 ft
AUSTIN CHALK 12,672 ft-12,473 ft
EAGLE FORD - H2S (Eagle Ford)12,704 ft-12,505 ft
COOK MOUNTAIN
EDWARDS - H2S (Edwards)
FRIO - DISPOSAL (Frio)
HOCKLEY - DISPOSAL
JACKSON-YEGUA - DISPOSAL (Jackson)
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
42-297-36277 THREE SISTERS 01 · ENSIGN OPERATING LLC
0.0 mi
Queen City 4,839'Wilcox 5,239'Austin Chalk 12,663'Eagle Ford 12,697'Cook Mountain HOCKLEY - DISPOSAL Edwards Frio Sligo Jackson
42-297-36279 THREE SISTERS 01 · ENSIGN OPERATING LLC
0.0 mi
Queen City 4,839'Wilcox 5,239'Austin Chalk 12,675'Eagle Ford 12,716'Cook Mountain HOCKLEY - DISPOSAL Sligo Jackson Frio Edwards
42-297-36276 THREE SISTERS 01 · ENSIGN OPERATING LLC
0.0 mi
Queen City 4,839'Wilcox 5,239'Austin Chalk 12,579'Eagle Ford 12,622'Sligo HOCKLEY - DISPOSAL Jackson Frio Cook Mountain Edwards
42-297-35782 THREE SISTERS 01 · PIONEER NATURAL RES. USA, INC.
0.4 mi
Frio 250'HOCKLEY - DISPOSAL 740'Jackson 1,459'Cook Mountain 2,535'Queen City 3,792'Wilcox 5,162'Austin Chalk 12,226'Eagle Ford 12,453'Sligo Edwards
42-297-35934 THREE SISTERS 01 · PIONEER NATURAL RES. USA, INC.
0.5 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
42-297-35824 THREE SISTERS 01 · PIONEER NATURAL RES. USA, INC.
0.5 mi
HOCKLEY - DISPOSAL 560'Jackson 1,261'Jackson 1,262'Cook Mountain 2,639'Cook Mountain 2,640'Queen City 3,549'Queen City 3,550'Wilcox 5,136'Wilcox 5,137'Austin Chalk 12,428'Austin Chalk 12,429'Eagle Ford 12,559' +4 more
42-297-35785 THREE SISTERS 01 · PIONEER NATURAL RES. USA, INC.
0.5 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
42-297-36122 THREE SISTERS 01 · ENSIGN OPERATING LLC
0.7 mi
Wilcox 4,951'Austin Chalk 12,563'Eagle Ford 12,596'Frio Queen City Sligo Edwards Cook Mountain HOCKLEY - DISPOSAL Jackson

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
12,773–19,688 ftPerforated

Casing (2)

SizeSet DepthCement
9.625"6,455 ft1,586 sx
5.5"19,688 ft3,476 sx

Permit History (1)

Applications (1)

#882242 A ENSIGN OPERATING LLC
received 2022-07-19

Records & Logs

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

W-2/G-1 2023-09-07 log on file
W-2/G-1 2023-06-22 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 28.549219
Lon -98.238884

Well Details

Well Number
69H
Max Depth
22,500 ft
Drill Type
Horizontal
County
LIVE OAK
District
2
Completed
2023-06-16

Operator

Location
HOUSTON
P-5 Status
Active (filed 2025-09-26)
Cum Oil (all leases)
409,189,156 bbl
Cum Gas (all leases)
1,029,735,602 mcf
Activities
CSGD/G, CSGD/P, G/PUR, GTHS/C, GTHS/G, GTHS/O, OPRS/G, OPRS/O
Total Permits
3,173