42-297-36299

PRODUCING Horizontal

THREE SISTERS 01 - WILBUR E 01 C

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

Permits

1

Max Depth

22,000 ft

First Permit

2022-11-04

Latest Activity

2022-11-04

Lifespan

< 1 yr

Regulatory Status

Schedule

ON SCHEDULE

Completion

2023-08-22

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

2023-05

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 (13) Elevation 176 ft (GL)

CSV
FormationTop Depth (MD)Subsea (+above / −below SL)
QUEEN CITY 3,343 ft-3,167 ft
REKLAW 4,080 ft-3,904 ft
WILCOX 4,731 ft-4,555 ft
ANACACHO 12,132 ft-11,956 ft
AUSTIN CHALK 12,132 ft-11,956 ft
AUSTIN CHALK 12,360 ft-12,184 ft
EAGLE FORD - H2S (Eagle Ford)12,440 ft-12,264 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
42-297-36298 THREE SISTERS 01 - WILBUR E 01 B · ENSIGN OPERATING LLC
0.0 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
42-297-36300 THREE SISTERS 01 - WILBUR E 01 D · ENSIGN OPERATING LLC
0.0 mi
Queen City 343'Wilcox 4,731'Austin Chalk 12,358'Eagle Ford 12,439'HOCKLEY - DISPOSAL Cook Mountain Edwards Jackson Sligo Frio
42-297-36297 THREE SISTERS 01 - WILBUR E 01 A · ENSIGN OPERATING LLC
0.0 mi
Queen City 3,433'Wilcox 4,731'Austin Chalk 12,417'Eagle Ford 12,493'Sligo Cook Mountain Edwards Jackson HOCKLEY - DISPOSAL Frio
42-297-36404 THREE SISTERS 01 · MARATHON OIL EF LLC
0.3 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'Edwards Jackson Frio Sligo HOCKLEY - DISPOSAL
42-297-36403 THREE SISTERS 01 · MARATHON OIL EF LLC
0.3 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'Sligo Jackson Frio HOCKLEY - DISPOSAL Edwards
42-297-36231 THREE SISTERS 01 - WK01 A · ENSIGN OPERATING LLC
1.0 mi
Queen City 3,743'Wilcox 4,961'Austin Chalk 12,421'Eagle Ford 12,473'Sligo Cook Mountain Edwards Jackson HOCKLEY - DISPOSAL Frio
42-297-36232 THREE SISTERS 01 - WK01 B · ENSIGN OPERATING LLC
1.0 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
1.0 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
12,837–18,746 ftPerforated

Casing (2)

SizeSet DepthCement
9.625"6,480 ft1,571 sx
5.5"18,746 ft3,275 sx

Permit History (1)

Applications (1)

#885386 A ENSIGN OPERATING LLC
received 2022-10-31

Records & Logs

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

W-2/G-1 2023-11-01
W-2/G-1 2023-10-03
W-2/G-1 2023-09-07 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 28.576090
Lon -98.228707

Well Details

Well Number
03H
Max Depth
22,000 ft
Drill Type
Horizontal
County
LIVE OAK
District
2
Completed
2023-08-22

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