42-211-32419
Final CompletionHUMPHREYS 28
HEMPHILL County · District 10 · ENERVEST OPERATING L.L.C. · SPARKS (TONKAWA)
Permits
1
Max Depth
11,250 ft
First Permit
2000-03-23
Latest Activity
2000-03-23
Lifespan
< 1 yr
Regulatory Status
Schedule
OFF SCHEDULE
Completion
2000-06-02
Shut-In
—
Plugged
—
EWA / Production operator mismatch
Scheduling: ENERVEST OPERATING L.L.C. ≠ Production: UNBRIDLED RESOURCES, LLC (reported 2026-04)
EWA / Permit operator mismatch
Scheduling: ENERVEST OPERATING L.L.C. ≠ Permit: EOG RESOURCES, INC.
Resolved via: production → UNBRIDLED RESOURCES, 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
2000-06
Last Production
2026-07
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 (2) Elevation 2,652 ft (GR)
CSV| Formation | Top Depth (MD) | Subsea (+above / −below SL) |
|---|---|---|
| DOUGLAS | 6,938 ft | -4,286 ft |
| TONKAWA | 7,644 ft | -4,992 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 |
|---|---|
| 7,675–7,704 ft | Perforated |
Casing (3)
| Size | Set Depth | Cement |
|---|---|---|
| 9.625" | 2,025 ft | 865 sx |
| 5.5" | 10,800 ft | 225 sx |
| 5.5" | — | 200 sx |
Permit History (1)
Applications (1)
Records & Logs
3 completion filings on record · 2 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
- 4
- Max Depth
- 11,250 ft
- Drill Type
- Vertical
- County
- HEMPHILL
- District
- 10
- Operator
- ENERVEST OPERATING L.L.C.
- Completed
- 2000-06-02
Operator
- Name
- ENERVEST OPER, L.L.C
- Location
- HOUSTON
- P-5 Status
- Active (filed 2026-01-13)
- Cum Oil (all leases)
- 39,678,049 bbl
- Cum Gas (all leases)
- 1,492,558,001 mcf
- Activities
- CSGD/G, G/PUR, GTHS/G, OPRS/G
- Total Permits
- 1,249