42-339-31011
PRODUCINGKEYSTONE MILLS
MONTGOMERY County · District 3 · HIGHMARK ENERGY OPERATING LLC · CONROE (MIDDLE WILCOX CONS.)
Permits
3
Max Depth
14,000 ft
First Permit
2002-03-01
Latest Activity
2003-06-19
Lifespan
1 yrs
Regulatory Status
Schedule
ON SCHEDULE
Completion
2003-08-07
Shut-In
—
Plugged
—
P-5 Org Status: Active
EWA / Production operator mismatch
Scheduling: HIGHMARK ENERGY OPERATING LLC ≠ Production: DENBURY ONSHORE, LLC (reported 2024-10)
EWA / Permit operator mismatch
Scheduling: HIGHMARK ENERGY OPERATING LLC ≠ Permit: EXXON MOBIL CORPORATION
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
2002-09
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 (3) Elevation 153 ft (GL)
CSV| Formation | Top Depth (MD) | Subsea (+above / −below SL) |
|---|---|---|
| YEGUA (COCKFIELD) (Yegua) | 4,632 ft | -4,479 ft |
| COOK MOUNTAIN | 6,202 ft | -6,049 ft |
| WILCOX | 7,904 ft | -7,751 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 (5)
| Interval | Type |
|---|---|
| 10,045–10,055 ft | Perforated |
| 10,500–10,506 ft | Perforated |
| 10,634–10,640 ft | Perforated |
| 11,428–11,434 ft | Perforated |
| 11,790–11,800 ft | Perforated |
Casing (3)
| Size | Set Depth | Cement |
|---|---|---|
| 13.375" | 1,611 ft | 1,400 sx |
| 9.625" | 9,705 ft | 1,443 sx |
| 5" | 13,705 ft | 1,350 sx |
Permit History (3)
Applications (3)
Records & Logs
3 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
- 47
- Max Depth
- 14,000 ft
- Drill Type
- Vertical
- County
- MONTGOMERY
- District
- 3
- Operator
- HIGHMARK ENERGY OPERATING LLC
- Completed
- 2003-08-07
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