42-003-37603
Final CompletionSHAFTER LAKE CLEARFORK UNIT
ANDREWS County · District 8 · HIGHMARK ENERGY OPERATING LLC · SHAFTER LAKE (CLEAR FORK)
Permits
1
Max Depth
7,000 ft
First Permit
1995-02-15
Latest Activity
1995-02-15
Lifespan
< 1 yr
Regulatory Status
Schedule
OFF SCHEDULE
Completion
1995-07-03
Shut-In
—
Plugged
—
EWA / Permit operator mismatch
Scheduling: HIGHMARK ENERGY OPERATING LLC ≠ Permit: HENRY PETROLEUM CORP.
Resolved via: production → HIGHMARK ENERGY 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
1995-02
Last Production
2026-07
Injection / Disposal
ANDREWS County disposal market →Permitted Volume
750 bbl/d
Max Pressure
2,850 psi
Injection Interval
5,700–7,000 ft
Injected (12mo)
77,292 bbl
Monthly injected volume (bbl, from H-10 filings through 2026-03-01)
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 (5) Elevation 3,193 ft (GR)
CSV| Formation | Top Depth (MD) | Subsea (+above / −below SL) |
|---|---|---|
| YATES | 2,850 ft | +343 ft |
| SAN ANDRES | 4,450 ft | -1,257 ft |
| UPPER CLEARFORK (Clear Fork) | 5,780 ft | -2,587 ft |
| LOWER CLEARFORK (Clear Fork) | 6,610 ft | -3,417 ft |
| TUBB | 6,770 ft | -3,577 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 (7)
| Interval | Type |
|---|---|
| 6,548–6,568 ft | Perforated |
| 6,679–6,688 ft | Perforated |
| 6,679–6,891 ft | Perforated |
| 6,694–6,704 ft | Perforated |
| 6,799–6,820 ft | Perforated |
| 6,827–6,833 ft | Perforated |
| 6,879–6,891 ft | Perforated |
Casing (2)
| Size | Set Depth | Cement |
|---|---|---|
| 8.625" | 1,710 ft | 750 sx |
| 4.5" | 7,000 ft | 1,600 sx |
Permit History (1)
Applications (1)
Records & Logs
5 completion filings on record.
Completion packets open directly (post-2011 filings include attached logs). Log images and the UL library can't be deep-linked — clicking copies the API for you to paste.
No GPS coordinates yet
Well Details
- Well Number
- 426
- Max Depth
- 7,000 ft
- Drill Type
- Vertical
- County
- ANDREWS
- District
- 8
- Operator
- HIGHMARK ENERGY OPERATING LLC
- Completed
- 1995-07-03
Operator
- Location
- HOUSTON
- P-5 Status
- Active (filed 2026-03-09)
- Cum Oil (all leases)
- 4,551,977 bbl
- Cum Gas (all leases)
- 30,465,409 mcf
- Activities
- CSGD/G, G/PUR, GTHS/G, OPRS/G, OPRS/O
- Total Permits
- 15