42-181-31443

PRODUCING Directional

IRBY

GRAYSON County · District 9 · TATANKA OPERATING LLC · MULDER (OIL CREEK)

Permits

Max Depth

12,500 ft

First Permit

2008-06-17

Latest Activity

2009-05-26

Lifespan

< 1 yr

Regulatory Status

Schedule

ON SCHEDULE

Completion

2009-10-22

Shut-In

—

Plugged

—

P-5 Org Status: Active

EWA / Permit operator mismatch

Scheduling: TATANKA OPERATING LLC ≠ Permit: ATOKA OPERATING, INC.

Resolved via: production → TATANKA OPERATING, LLC

Production Summary

Cum Oil

— bbl

Cum Gas

— mcf

First Production

2009-10

Last Production

2026-07

Operator History

Chain of Custody

ATOKA OPERATING, INC. 2009-2023→ TATANKA OPERATING, LLC 2023-2026

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 675 ft

CSV

Formation	Top Depth (MD)	Subsea (+above / −below SL)
GREY	7,220 ft	-6,545 ft
PENN UNCF. (Pennsylvanian)	8,766 ft	-8,091 ft
OIL CREEK	9,320 ft	-8,645 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 (2)

Interval	Type
9,320–9,346 ft	Perforated
9,353–9,370 ft	Perforated

Casing (2)

Size	Set Depth	Cement
9.625"	1,780 ft	650 sx
5.5"	9,538 ft	1,200 sx

Permit History (2)

#663096 Drill Final Completion

IRBY · 12,500 ft

2009-05-26

Spud 2009-08-25

#663096 Drill

IRBY · 12,500 ft

2008-06-17

Applications (2)

#663096 A ATOKA OPERATING, INC.

received 2009-05-22

#663096 A ATOKA OPERATING, INC.

received 2008-05-28

Records & Logs

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

W-2/G-1 2009-10-26 log on file

W-2/G-1 2009-12-03

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 GRAYSON County.

Well Details

Well Number: 2
Max Depth: 12,500 ft
Drill Type: Directional
County: GRAYSON
District: 9
Operator: TATANKA OPERATING LLC
Completed: 2009-10-22

Operator

Name: TATANKA OPERATING, LLC
Location: WHITESBORO
P-5 Status: Active (filed 2025-07-11)
Cum Oil (all leases): 164,332 bbl
Cum Gas (all leases): 334,265 mcf
Activities: OPRS/G, OPRS/O