42-181-31395
Final CompletionBROWN J. N.
GRAYSON County · District 9 · TATANKA OPERATING LLC · GORDONVILLE WEST (VIOLA)
Permits
3
Max Depth
19,500 ft
First Permit
2005-01-26
Latest Activity
2005-01-26
Lifespan
< 1 yr
Regulatory Status
Schedule
OFF SCHEDULE
Completion
2005-12-09
Shut-In
—
Plugged
2025-09-18
EWA / Production operator mismatch
Scheduling: TATANKA OPERATING LLC ≠ Production: ATOKA OPERATING, INC. (reported 2022-03)
EWA / Permit operator mismatch
Scheduling: TATANKA OPERATING LLC ≠ Permit: HEAPE EXPLORATION, INC.
Resolved via: scheduling → TATANKA OPERATING LLC
Production Summary Production data is a work in progress — still being validated against RRC filings. Spot something off or have questions? [email protected]
Cum Oil
— bbl
Cum Gas
— mcf
First Production
2005-10
Last Production
2025-11
Operator History
Chain of Custody
Lease Production
Production is reported at the lease level. View production data, decline curves, and history on the lease page.
Formation Tops (3) Elevation 782 ft
CSV| Formation | Top Depth (MD) | Subsea (+above / −below SL) |
|---|---|---|
| DORNICK HILLS | 11,180 ft | -10,398 ft |
| VIOLA | 14,100 ft | -13,318 ft |
| BIRDSEYE | 15,700 ft | -14,918 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 |
|---|---|
| 14,112–14,662 ft | Perforated |
Casing (2)
| Size | Set Depth | Cement |
|---|---|---|
| 10.75" | 4,485 ft | 750 sx |
| 7.625" | 16,875 ft | 2,000 sx |
Permit History (3)
Applications (3)
Records & Logs
2 completion filings on record · 1 with log images at RRC.
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
Well Details
- Well Number
- 1
- Max Depth
- 19,500 ft
- Drill Type
- Vertical
- County
- GRAYSON
- District
- 9
- Operator
- TATANKA OPERATING LLC
- Completed
- 2005-12-09
Operator
- 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