42-297-35883

PRODUCING Horizontal

GUAJILLO WEST

LIVE OAK County · District 1 · MARATHON OIL EF LLC · EAGLEVILLE (EAGLE FORD-1)

Permits

1

Max Depth

17,850 ft

First Permit

2017-06-27

Latest Activity

2017-06-27

Lifespan

< 1 yr

Regulatory Status

Schedule

ON SCHEDULE

Completion

2018-03-19

Shut-In

Plugged

P-5 Org Status: Active

Production Summary

Cum Oil

bbl

Cum Gas

mcf

First Production

2017-07

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 235 ft (GR)

CSV
FormationTop Depth (MD)Subsea (+above / −below SL)
QUEEN CITY 2,950 ft-2,715 ft
WILCOX 5,240 ft-5,005 ft
AUSTIN CHALK 10,927 ft-10,692 ft
EAGLE FORD - H2S (Eagle Ford)11,043 ft-10,808 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
42-297-35884 GUAJILLO WEST · MARATHON OIL EF LLC
0.0 mi
Queen City 2,950'Wilcox 5,240'Austin Chalk 10,928'Eagle Ford 11,048'Cook Mountain Jackson HOCKLEY - DISPOSAL Edwards Frio Sligo
42-297-35885 GUAJILLO WEST · MARATHON OIL EF LLC
0.0 mi
Queen City 2,950'Wilcox 5,240'Austin Chalk 10,911'Eagle Ford 11,030'Jackson Sligo HOCKLEY - DISPOSAL Frio Cook Mountain Edwards
42-297-35886 GUAJILLO WEST · MARATHON OIL EF LLC
0.0 mi
Queen City 2,950'Wilcox 5,240'Austin Chalk 10,910'Eagle Ford 11,029'HOCKLEY - DISPOSAL Jackson Sligo Frio Cook Mountain Edwards
42-297-35979 74 RANCH-GUAJILLO UNIT A · MARATHON OIL EF LLC
0.0 mi
Queen City 3,091'Wilcox 5,499'Austin Chalk 10,962'Eagle Ford 11,053'Sligo Edwards Cook Mountain HOCKLEY - DISPOSAL Jackson Frio
42-297-35978 74 RANCH-GUAJILLO UNIT A · MARATHON OIL EF LLC
0.0 mi
Queen City 3,091'Wilcox 5,499'Austin Chalk 10,958'Eagle Ford 11,056'Eagle Ford 11,080'Edwards HOCKLEY - DISPOSAL Cook Mountain Sligo Jackson Frio
42-297-35980 74 RANCH-GUAJILLO UNIT A · MARATHON OIL EF LLC
0.0 mi
Queen City 3,091'Wilcox 5,499'Austin Chalk 10,957'Eagle Ford 11,051'Cook Mountain Sligo HOCKLEY - DISPOSAL Jackson Frio Edwards
42-297-35982 74 RANCH-GUAJILLO UNIT A AC · MARATHON OIL EF LLC
0.0 mi
Queen City 3,091'Wilcox 5,499'Austin Chalk 10,958'Austin Chalk 11,014'HOCKLEY - DISPOSAL Edwards Eagle Ford Cook Mountain Jackson Sligo Frio
42-297-35981 74 RANCH-GUAJILLO UNIT A · MARATHON OIL EF LLC
0.0 mi
Queen City 3,091'Wilcox 5,499'Austin Chalk 10,948'Eagle Ford 11,041'Sligo Edwards Cook Mountain HOCKLEY - DISPOSAL Jackson 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
11,175–16,593 ftPerforated

Casing (2)

SizeSet DepthCement
9.625"5,427 ft1,659 sx
5.5"16,702 ft3,058 sx

Permit History (1)

Applications (1)

#827972 A MARATHON OIL EF LLC
received 2017-06-19

Records & Logs

1 completion filing on record · 1 with log images at RRC.

W-2/G-1 2018-04-13 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 28.636236
Lon -98.297246

Well Details

Well Number
15H
Max Depth
17,850 ft
Drill Type
Horizontal
County
LIVE OAK
District
1
Completed
2018-03-19

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