42-013-34462

Horizontal

HENKE-WILHELM UNIT B

ATASCOSA County · District 1 · MARATHON OIL EF LLC

Permits

2

Max Depth

14,000 ft

First Permit

2012-01-26

Latest Activity

2012-11-15

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 375 ft (GR)

CSV
FormationTop Depth (MD)Subsea (+above / −below SL)
ANACACHO 10,545 ft-10,170 ft
AUSTIN CHALK 10,755 ft-10,380 ft
EAGLE FORD 10,921 ft-10,546 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
11,125–14,945 ftPerforated

Casing (2)

SizeSet DepthCement
10.75"5,100 ft1,575 sx
5.5"15,145 ft710 sx

Permit History (2)

Applications (2)

#751357 A MARATHON OIL EF LLC
received 2012-11-12
#731968 A MARATHON OIL EF LLC
received 2012-01-18

Records & Logs

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

W-2/G-1 2013-02-04
W-2/G-1 2012-06-08 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 ATASCOSA County.

Well Details

Well Number
1H
Max Depth
14,000 ft
Drill Type
Horizontal
County
ATASCOSA
District
1

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
3,166