42-339-30407
Long String CasingCONROE FIELD UNIT
MONTGOMERY County · District 3 · HIGHMARK ENERGY OPERATING LLC · CONROE
Permits
1
Max Depth
5,800 ft
First Permit
1978-06-12
Latest Activity
1978-06-12
Lifespan
< 1 yr
Regulatory Status
Schedule
OFF SCHEDULE
Completion
1997-09-24
Shut-In
—
Plugged
—
EWA / Permit operator mismatch
Scheduling: HIGHMARK ENERGY OPERATING LLC ≠ Permit: EXXON 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
1993-01
Last Production
2026-07
Injection / Disposal
Permitted Volume
25,000 bbl/d
Max Pressure
1,200 psi
Injection Interval
2,400–4,020 ft
Injected (12mo)
5,687,331 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 (7) Elevation 165 ft (DF)
CSV| Formation | Top Depth (MD) | Subsea (+above / −below SL) |
|---|---|---|
| FRIO | 2,728 ft | -2,563 ft |
| VICKSBURG | 3,523 ft | -3,358 ft |
| VICKSBURG | 3,525 ft | -3,360 ft |
| JACKSON | 3,790 ft | -3,625 ft |
| COCKFIELD | 4,725 ft | -4,560 ft |
| MC 2 | 4,943 ft | -4,778 ft |
| MC2 | 4,943 ft | -4,778 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 (10)
| Interval | Type |
|---|---|
| 3,090–3,140 ft | Perforated |
| 3,750–3,780 ft | Perforated |
| 4,881–4,888 ft | Perforated |
| 4,896–4,906 ft | Perforated |
| 4,928–4,935 ft | Perforated |
| 4,945–4,954 ft | Perforated |
| 4,962–4,972 ft | Perforated |
| 4,968–4,978 ft | Perforated |
| 4,992–4,997 ft | Perforated |
| 5,018–5,024 ft | Perforated |
Casing (5)
| Size | Set Depth | Cement |
|---|---|---|
| 16" | 302 ft | 375 sx |
| 10.75" | 706 ft | 800 sx |
| 2.875" | 4,625 ft | — |
| 7" | 5,199 ft | 1,005 sx |
| 7" | — | 330 sx |
Permit History (1)
Applications (1)
Records & Logs
13 completion filings on record.
+7 more filings
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
- 310
- Max Depth
- 5,800 ft
- Drill Type
- Vertical
- County
- MONTGOMERY
- District
- 3
- Operator
- HIGHMARK ENERGY OPERATING LLC
- Completed
- 1997-09-24
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