42-255-32551

Horizontal

SPAHN-MIKKELSON UNIT

KARNES County · District 2 · MARATHON OIL EF LLC

Permits

2

Max Depth

14,000 ft

First Permit

2012-05-22

Latest Activity

2013-02-20

Lifespan

< 1 yr

Regulatory Status

Schedule

OFF SCHEDULE

Completion

Shut-In

Plugged

Production Summary

Cum Oil

bbl

Cum Gas

mcf

First Production

2012-05

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 (3) Elevation 350 ft (GR)

CSV
FormationTop Depth (MD)Subsea (+above / −below SL)
ANACACHO 11,401 ft-11,051 ft
AUSTIN CHALK 11,545 ft-11,195 ft
EAGLE FORD 11,770 ft-11,420 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
12,265–16,645 ftPerforated

Casing (2)

SizeSet DepthCement
10.75"5,913 ft2,465 sx
5.5"16,718 ft1,715 sx

Permit History (2)

Applications (2)

#756407 A MARATHON OIL EF LLC
received 2013-02-07
#740524 A MARATHON OIL EF LLC
received 2012-05-11

Records & Logs

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

W-2/G-1 2012-12-20
W-2/G-1 2012-08-30 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.

No GPS coordinates yet

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

Well Details

Well Number
2H
Max Depth
14,000 ft
Drill Type
Horizontal
County
KARNES
District
2

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
3,168