42-013-36220

PRODUCING Horizontal

MCS FOUNDATION UNIT

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

Permits

1

Max Depth

17,500 ft

First Permit

2025-01-23

Latest Activity

2025-01-23

Lifespan

< 1 yr

Regulatory Status

Schedule

ON SCHEDULE

Completion

2025-09-09

Shut-In

Plugged

P-5 Org Status: Active

Production Summary

Cum Oil

bbl

Cum Gas

mcf

First Production

2025-07

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 382 ft (GR)

CSV
FormationTop Depth (MD)Subsea (+above / −below SL)
QUEEN CITY 2,414 ft-2,032 ft
REKLAW 3,122 ft-2,740 ft
CARRIZO 3,812 ft-3,430 ft
WILCOX - DISPOSAL (Wilcox)3,919 ft-3,537 ft
ANACACHO - H2S (Anacacho)10,116 ft-9,734 ft
AUSTIN CHALK - H2S, DISPOSAL (Austin Chalk)10,286 ft-9,904 ft
BARTOSH
ESCONDIDO - H2S, DISPOSAL (Escondido)
NAVARRO - H2S (Navarro)
OLMOS - DISPOSAL (Olmos)

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
42-013-36221 MCS FOUNDATION UNIT · MARATHON OIL EF LLC
0.0 mi
Queen City 2,414'Reklaw 3,122'Carrizo 3,812'Wilcox 3,919'Anacacho 10,118'Austin Chalk 10,279'Navarro Bartosh Olmos Escondido
42-013-36222 MCS FOUNDATION UNIT · MARATHON OIL EF LLC
0.0 mi
Queen City 2,414'Reklaw 3,122'Carrizo 3,812'Wilcox 3,919'Anacacho 10,007'Austin Chalk 10,271'Navarro Escondido Olmos Bartosh
42-013-36223 MCS FOUNDATION UNIT · MARATHON OIL EF LLC
0.0 mi
Queen City 2,414'Reklaw 3,122'Carrizo 3,812'Wilcox 3,919'Anacacho 10,101'Austin Chalk 10,269'Navarro Bartosh Olmos Escondido
42-013-36219 TOM FAMILY UNIT · MARATHON OIL EF LLC
0.0 mi
Queen City 2,414'Reklaw 3,122'Carrizo 3,812'Wilcox 3,919'Anacacho 10,122'Austin Chalk 10,286'Navarro Bartosh Escondido Olmos
42-013-35643 W.T. HURT UNIT · XTO ENERGY INC.
0.2 mi
Queen City 840'Reklaw 1,901'Bartosh 3,165'Carrizo 3,721'Wilcox 6,000'Navarro 6,152'Escondido 7,625'Olmos 8,704'Anacacho 10,049'Austin Chalk 10,128'
42-013-35644 W.T. HURT UNIT · XTO ENERGY INC.
0.2 mi
Queen City 840'Reklaw 1,900'Bartosh 3,165'Carrizo 3,720'Wilcox 6,000'Navarro 6,150'Escondido 7,625'Olmos 8,689'Anacacho 10,049'Austin Chalk 10,123'
42-013-35653 W.T. HURT UNIT AC · XTO ENERGY INC.
0.2 mi
Queen City 840'Reklaw 1,901'Bartosh 3,165'Carrizo 3,721'Wilcox 6,000'Navarro 6,152'Escondido 7,625'Olmos 8,983'Anacacho 10,268'Austin Chalk 10,292'
42-013-35654 W.T. HURT UNIT · XTO ENERGY INC.
0.2 mi
Queen City 840'Reklaw 1,901'Bartosh 3,165'Carrizo 3,722'Wilcox 6,000'Navarro 6,155'Escondido 7,625'Olmos 8,674'Anacacho 10,050'Austin Chalk 10,122'

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
11,082–19,200 ftPerforated

Casing (3)

SizeSet DepthCement
9.625"5,474 ft1,540 sx
5.5"19,181 ft3,085 sx
5.5"21,110 ft2,510 sx

Permit History (1)

Applications (1)

#905375 A MARATHON OIL EF LLC
received 2025-01-21

Records & Logs

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

W-2/G-1 2026-03-11
W-2/G-1 2025-08-15 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 28.761728
Lon -98.199456

Well Details

Well Number
7H
Max Depth
17,500 ft
Drill Type
Horizontal
County
ATASCOSA
District
1
Completed
2025-09-09

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