42-297-36403

PRODUCING Horizontal

THREE SISTERS 01

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

Permits

1

Max Depth

22,000 ft

First Permit

2024-01-25

Latest Activity

2024-01-25

Lifespan

< 1 yr

Regulatory Status

Schedule

ON SCHEDULE

Completion

2024-04-30

Shut-In

Plugged

P-5 Org Status: Active

Production Summary

Cum Oil

bbl

Cum Gas

mcf

First Production

2024-03

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 (12) Elevation 175 ft (GL)

CSV
FormationTop Depth (MD)Subsea (+above / −below SL)
COOK MOUNTAIN 1,278 ft-1,103 ft
QUEEN CITY 2,202 ft-2,027 ft
REKLAW 2,847 ft-2,672 ft
WILCOX 3,718 ft-3,543 ft
ANACACHO 11,998 ft-11,823 ft
AUSTIN CHALK 12,202 ft-12,027 ft
EAGLE FORD - H2S (Eagle Ford)12,249 ft-12,074 ft
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
42-297-36404 THREE SISTERS 01 · MARATHON OIL EF LLC
0.0 mi
Cook Mountain 1,278'Queen City 2,202'Reklaw 2,847'Wilcox 3,718'Anacacho 11,998'Austin Chalk 12,202'Eagle Ford 12,249'Frio Edwards HOCKLEY - DISPOSAL Sligo Jackson
42-297-36297 THREE SISTERS 01 - WILBUR E 01 A · ENSIGN OPERATING LLC
0.3 mi
Queen City 3,433'Wilcox 4,731'Austin Chalk 12,417'Eagle Ford 12,493'Cook Mountain HOCKLEY - DISPOSAL Sligo Jackson Frio Edwards
42-297-36298 THREE SISTERS 01 - WILBUR E 01 B · ENSIGN OPERATING LLC
0.3 mi
Queen City 3,343'Reklaw 4,080'Wilcox 4,080'Wilcox 4,731'Austin Chalk 12,405'Eagle Ford 12,478'Cook Mountain Edwards Jackson Frio HOCKLEY - DISPOSAL Sligo
42-297-36299 THREE SISTERS 01 - WILBUR E 01 C · ENSIGN OPERATING LLC
0.3 mi
Queen City 3,343'Reklaw 4,080'Wilcox 4,731'Austin Chalk 12,132'Anacacho 12,132'Austin Chalk 12,360'Eagle Ford 12,440'Frio HOCKLEY - DISPOSAL Jackson Sligo Cook Mountain +1 more
42-297-36300 THREE SISTERS 01 - WILBUR E 01 D · ENSIGN OPERATING LLC
0.4 mi
Queen City 343'Wilcox 4,731'Austin Chalk 12,358'Eagle Ford 12,439'Frio HOCKLEY - DISPOSAL Jackson Sligo Cook Mountain Edwards
42-297-36231 THREE SISTERS 01 - WK01 A · ENSIGN OPERATING LLC
0.8 mi
Queen City 3,743'Wilcox 4,961'Austin Chalk 12,421'Eagle Ford 12,473'HOCKLEY - DISPOSAL Edwards Cook Mountain Sligo Jackson Frio
42-297-36232 THREE SISTERS 01 - WK01 B · ENSIGN OPERATING LLC
0.8 mi
Queen City 3,647'Wilcox 5,089'Austin Chalk 12,426'Eagle Ford 12,519'Cook Mountain Edwards HOCKLEY - DISPOSAL Sligo Jackson Frio
42-297-36233 THREE SISTERS 01 - WK01 C · ENSIGN OPERATING LLC
0.8 mi
Queen City 3,647'Wilcox 5,125'Austin Chalk 12,460'Eagle Ford 12,522'Sligo Cook Mountain Edwards Jackson HOCKLEY - DISPOSAL Frio

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
12,460–17,324 ftPerforated

Casing (2)

SizeSet DepthCement
9.625"6,505 ft1,585 sx
5.5"17,324 ft3,206 sx

Permit History (1)

Applications (1)

#896716 A MARATHON OIL EF LLC
received 2024-01-22

Records & Logs

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

W-2/G-1 2024-08-14
W-2/G-1 2024-05-22 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 28.575431
Lon -98.234346

Well Details

Well Number
75H
Max Depth
22,000 ft
Drill Type
Horizontal
County
LIVE OAK
District
2
Completed
2024-04-30

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