42-003-33866
SHUT INUNIVERSITY 173
ANDREWS County · District 8 · HIGHMARK ENERGY OPERATING LLC · SHAFTER LAKE (ELLENBURGER)
Permits
1
Max Depth
11,800 ft
First Permit
1983-11-21
Latest Activity
1983-11-21
Lifespan
< 1 yr
Regulatory Status
Schedule
ON SCHEDULE
Completion
1984-03-09
Shut-In
—
Plugged
—
P-5 Org Status: Active
EWA / Production operator mismatch
Scheduling: HIGHMARK ENERGY OPERATING LLC ≠ Production: LEGACY RESERVES OPERATING LP (reported 2016-05)
EWA / Permit operator mismatch
Scheduling: HIGHMARK ENERGY OPERATING LLC ≠ Permit: ARCO OIL & GAS CO.
Resolved via: scheduling → 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
1993-01
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 (6) Elevation 3,225 ft (GR)
CSV| Formation | Top Depth (MD) | Subsea (+above / −below SL) |
|---|---|---|
| YATES | 3,000 ft | +225 ft |
| SAN ANDRES | 4,478 ft | -1,253 ft |
| CLEAR FORK | 5,810 ft | -2,585 ft |
| WICHITA ALBANY (Wichita-Albany) | 6,110 ft | -2,885 ft |
| DEVONIAN | 9,312 ft | -6,087 ft |
| ELLENBURGER | 11,630 ft | -8,405 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 |
|---|---|
| 11,633–11,687 ft | Perforated |
Casing (3)
| Size | Set Depth | Cement |
|---|---|---|
| 13.375" | 378 ft | 350 sx |
| 8.625" | 4,300 ft | 3,600 sx |
| 5.5" | 11,700 ft | 3,205 sx |
Permit History (1)
Applications (1)
Records & Logs
2 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
- 16
- Max Depth
- 11,800 ft
- Drill Type
- Vertical
- County
- ANDREWS
- District
- 8
- Operator
- HIGHMARK ENERGY OPERATING LLC
- Completed
- 1984-03-09
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