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42-013-34484

INJECTION Horizontal

MIDDLE MCCOWEN

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

Permits

1

Max Depth

18,200 ft

First Permit

2012-03-21

Latest Activity

2012-03-21

Lifespan

< 1 yr

Regulatory Status

Schedule

ON SCHEDULE

Completion

2017-01-18

Shut-In

—

Plugged

—

P-5 Org Status: Active

Production Summary

Cum Oil

— bbl

Cum Gas

— mcf

First Production

2011-08

Last Production

2026-07

Injection / Disposal

H-1 Injection Cancelled 2018-03-21 UIC #000115356 permitted 2017-06-28

Permitted Volume

2,000 mcf/d

Max Pressure

—

Injection Interval

10,963–11,077 ft

Injected (12mo)

—

Operator History

Chain of Custody

HILCORP ENERGY COMPANY 2011-2011→ MARATHON OIL EF LLC 2011-2026

Lease Production

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

Oil
production & DCA →

Formation Tops (3) Elevation 284 ft (GR)

CSV
FormationTop Depth (MD)Subsea (+above / −below SL)
ANACACHO 10,498 ft-10,214 ft
AUSTIN CHALK 10,761 ft-10,477 ft
EAGLE FORD 10,877 ft-10,593 ft

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 ↗

Perforations (1)

IntervalType
11,500–17,467 ftPerforated

Casing (2)

SizeSet DepthCement
9.625"5,175 ft1,240 sx
5.5"18,014 ft3,635 sx

Permit History (1)

#734689 Drill Final Completion

MIDDLE MCCOWEN · 18,200 ft

2012-03-21

Spud 2012-08-05

Applications (1)

#734689 A MARATHON OIL EF LLC
received 2012-02-24

Records & Logs

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

W-2/G-1 2017-09-21
W-2/G-1 2017-01-25
W-2/G-1 2017-01-18
W-2/G-1 2012-09-18 log on file
W-2/G-1 2012-07-30 log on file
Completion packets + logs ↗ Wellbore filings ↗

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.

No GPS coordinates yet

Coordinates come from the RRC GIS backfill and usually appear within days of permit issuance. Located in ATASCOSA County.

Well Details

Well Number
12H
Max Depth
18,200 ft
Drill Type
Horizontal
County
ATASCOSA
District
1
Operator
MARATHON OIL EF LLC
Completed
2017-01-18

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
3,175