42-401-34825
PRODUCINGWILLIAMSON UNIT
RUSK County · District 6 · HIGHMARK ENERGY OPERATING LLC · OAK HILL (COTTON VALLEY)
Permits
1
Max Depth
11,000 ft
First Permit
2008-07-09
Latest Activity
2008-07-09
Lifespan
< 1 yr
Regulatory Status
Schedule
ON SCHEDULE
Completion
2008-09-16
Shut-In
—
Plugged
—
P-5 Org Status: Active
EWA / Permit operator mismatch
Scheduling: HIGHMARK ENERGY OPERATING LLC ≠ Permit: ENERGEN RESOURCES CORPORATION
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
2008-09
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 (6) Elevation 318 ft (GL)
CSV| Formation | Top Depth (MD) | Subsea (+above / −below SL) |
|---|---|---|
| T. MASSIVE ANHYDRITE | 5,699 ft | -5,381 ft |
| RODESSA | 6,069 ft | -5,751 ft |
| JAMES (James Lime) | 6,439 ft | -6,121 ft |
| T. TRAVIS PEAK | 7,029 ft | -6,711 ft |
| UPPER CV SANDS | 9,012 ft | -8,694 ft |
| BOSSIER SHALE (Bossier) | 10,474 ft | -10,156 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 |
|---|---|
| 10,210–10,508 ft | Perforated |
Casing (3)
| Size | Set Depth | Cement |
|---|---|---|
| 16" | 40 ft | — |
| 8.625" | 1,105 ft | 370 sx |
| 4.5" | 10,705 ft | 1,050 sx |
Permit History (1)
Applications (1)
Records & Logs
2 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
- 11
- Max Depth
- 11,000 ft
- Drill Type
- Vertical
- County
- RUSK
- District
- 6
- Operator
- HIGHMARK ENERGY OPERATING LLC
- Completed
- 2008-09-16
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