42-211-33942
Final CompletionVOLLMERT C
HEMPHILL County · District 10 · UNIT PETROLEUM COMPANY · MENDOTA N. (MORROW UPPER)
Permits
4
Max Depth
11,330 ft
First Permit
2007-07-10
Latest Activity
2015-11-17
Lifespan
8 yrs
Regulatory Status
Schedule
OFF SCHEDULE
Completion
2007-09-10
Shut-In
—
Plugged
—
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
2007-09
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 (12) Elevation 2,717 ft (KB)
CSV| Formation | Top Depth (MD) | Subsea (+above / −below SL) |
|---|---|---|
| BASE RED BEDS | 4,014 ft | -1,297 ft |
| BROWN DOLOMITE | 4,014 ft | -1,297 ft |
| TOP BROWN DOLOMITE (Brown Dolomite) | 4,014 ft | -1,297 ft |
| DOUGLAS | 6,951 ft | -4,234 ft |
| DUGLAS | 6,951 ft | -4,234 ft |
| HEEBNER | 6,951 ft | -4,234 ft |
| KANSAS CITY | 8,140 ft | -5,423 ft |
| MARMATON | 9,086 ft | -6,369 ft |
| GRANITE WASH | 9,546 ft | -6,829 ft |
| NOVI | 10,806 ft | -8,089 ft |
| MORROW | 11,015 ft | -8,298 ft |
| MORROW SHALE (Morrow) | 11,015 ft | -8,298 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 (3)
| Interval | Type |
|---|---|
| 7,325–7,339 ft | Perforated |
| 10,077–10,708 ft | Perforated |
| 11,169–11,183 ft | Perforated |
Casing (2)
| Size | Set Depth | Cement |
|---|---|---|
| 9.625" | 2,870 ft | 1,250 sx |
| 5.5" | 11,330 ft | 340 sx |
Permit History (4)
VOLLMERT 'C' · 11,330 ft
2015-11-17
Spud 2016-10-24
VOLLMERT 'C' · 11,250 ft
2012-05-30
Spud 2011-09-12
VOLLMERT "C" · 11,250 ft
2009-09-10
Spud 2007-07-08
VOLLMERT "C" · 11,250 ft
2007-07-10
Spud 2007-07-07
Applications (4)
Records & Logs
7 completion filings on record · 2 with log images at RRC.
+1 more 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
Well Details
- Well Number
- 5
- Max Depth
- 11,330 ft
- Drill Type
- Vertical
- County
- HEMPHILL
- District
- 10
- Operator
- UNIT PETROLEUM COMPANY
- Completed
- 2007-09-10
Operator
- Name
- UNIT PETRO CO
- Location
- TULSA
- P-5 Status
- Active (filed 2025-01-13)
- Cum Oil (all leases)
- 8,610,362 bbl
- Cum Gas (all leases)
- 788,031,686 mcf
- Activities
- CSGD/P, G/PUR, GTHS/G, OPRS/G, OPRS/O
- Total Permits
- 1,100