42-123-31286

Final Completion

ATOKA-GOHLKE

DE WITT County · District 2 · MASTODON OPERATING COMPANY LLC · SPEARY EAST (WILCOX 9800)

Permits

Max Depth

10,200 ft

First Permit

1982-12-31

Latest Activity

2004-11-05

Lifespan

22 yrs

Regulatory Status

Schedule

OFF SCHEDULE

Completion

2004-11-06

Shut-In

—

Plugged

2020-01-08

EWA / Production operator mismatch

Scheduling: MASTODON OPERATING COMPANY LLC ≠ Production: HELIA TEC RESOURCES, INC. (reported 2008-06)

EWA / Permit operator mismatch

Scheduling: MASTODON OPERATING COMPANY LLC ≠ Permit: NESS OPERATING OF TEXAS, INC.

Resolved via: scheduling → MASTODON OPERATING COMPANY LLC

Production Summary

Cum Oil

— bbl

Cum Gas

— mcf

First Production

1993-01

Last Production

2026-07

Operator History

Chain of Custody

NESS OPERATING OF TEXAS, INC. 2004-2004→ ROCKOIL ENERGY OF TEXAS, INC. 2005-2006→ HELIA TEC RESOURCES, INC. 2008-2008

Lease Production

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

Formation Tops (2) Elevation 316 ft

CSV

Formation	Top Depth (MD)	Subsea (+above / −below SL)
LOWER WILCOX (Wilcox)	9,472 ft	-9,156 ft
SPEARY	10,010 ft	-9,694 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)

Interval	Type
10,015–10,025 ft	Perforated

Casing (5)

Size	Set Depth	Cement
10.75"	1,516 ft	—
10.75"	1,570 ft	—
7"	9,000 ft	—
7"	9,103 ft	—
4.5"	10,038 ft	106 sx

Permit History (2)

#553256 Recompletion Final Completion

ATOKA-GOHLKE · 10,050 ft

2004-11-05

#184007 Drill

GOHLKE, LEEROY · 10,200 ft

1982-12-31

Applications (3)

#553256 X NESS OPERATING OF TEXAS, INC.

received 2004-11-08

#553256 A NESS OPERATING OF TEXAS, INC.

received 2004-11-05

#184007 A ATOKA ENERGY CORPORATION

received 1982-12-31

Records & Logs

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

W-2/G-1 2004-12-21 log on file

W-2/G-1 2005-03-24

W-2/G-1 1985-06-10

W-2/G-1 1985-07-19

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 DE WITT County.

Well Details

Well Number: 1
Max Depth: 10,200 ft
Drill Type: Vertical
County: DE WITT
District: 2
Operator: MASTODON OPERATING COMPANY LLC
Completed: 2004-11-06

Operator

Name: MASTODON OPERATING COMPANY, LLC
Location: HOUSTON
P-5 Status: Delinquent (filed 2013-07-19)
Cum Oil (all leases): 17,758 bbl
Cum Gas (all leases): 36,857 mcf
Activities: OPRS/G, OPRS/O