← Wells

42-461-30269

Final Completion

SCHELLHORN -A-

UPTON County · District 7 · MARATHON OIL COMPANY · HELUMA W. (DEVONIAN)

Permits

1

Max Depth

10,590 ft

First Permit

1992-12-15

Latest Activity

1992-12-15

Lifespan

< 1 yr

Regulatory Status

Schedule

OFF SCHEDULE

Completion

1974-04-01

Shut-In

—

Plugged

1996-08-27

!

EWA / Production operator mismatch

Scheduling: MARATHON OIL COMPANY ≠ Production: OLSEN ENERGY INC. (reported 1995-04)

Resolved via: scheduling → MARATHON OIL COMPANY

Production Summary

Cum Oil

— bbl

Cum Gas

— mcf

First Production

1993-01

Last Production

2008-03

Operator History

Chain of Custody

MARATHON OIL COMPANY 1993-1993→ OLSEN ENERGY INC. 1993-1995

Lease Production

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

Oil
production & DCA →
Oil
production & DCA →

Formation Tops (3) Elevation 2,846 ft (GL)

CSV
FormationTop Depth (MD)Subsea (+above / −below SL)
DEVONIAN 8,533 ft-5,687 ft
FUSSELMAN 9,462 ft-6,616 ft
ELLENBURGER 10,446 ft-7,600 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 (5)

IntervalType
8,560–9,284 ftPerforated
10,446–10,456 ftPerforated
10,457–10,472 ftPerforated
10,480–10,494 ftPerforated
10,502–10,531 ftPerforated

Casing (3)

SizeSet DepthCement
11.75"570 ft375 sx
8.625"3,796 ft400 sx
5.5"10,590 ft1,250 sx

Permit History (1)

#406820 Recompletion Final Completion

SCHELLHORN "A" · 10,590 ft

1992-12-15

Spud 1993-01-26

Applications (1)

#406820 A MARATHON OIL COMPANY
received 1992-12-04

Records & Logs

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

W-2/G-1 1993-03-18 log on file
W-2/G-1 1974-04-16
W-2/G-1 1974-04-16
Completion packets + logs ↗ Wellbore filings ↗

Completion packets open directly (post-2011 filings include attached logs). Log images and the UL library 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 UPTON County.

Well Details

Well Number
1
Max Depth
10,590 ft
Drill Type
Vertical
County
UPTON
District
7
Operator
MARATHON OIL COMPANY
Completed
1974-04-01

Operator

Location
HOUSTON
P-5 Status
Active (filed 2025-08-14)
Cum Oil (all leases)
183,150,113 bbl
Cum Gas (all leases)
1,013,063,895 mcf
Activities
CSGD/P, G/PUR
Total Permits
3,707