42-339-30454
PRODUCINGCONROE FIELD UNIT
MONTGOMERY County · District 3 · HIGHMARK ENERGY OPERATING LLC · CONROE
Permits
1
Max Depth
5,700 ft
First Permit
1979-09-17
Latest Activity
1979-09-17
Lifespan
< 1 yr
Regulatory Status
Schedule
ON SCHEDULE
Completion
2016-03-24
Shut-In
—
Plugged
—
P-5 Org Status: Active
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
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 68 ft
CSV| Formation | Top Depth (MD) | Subsea (+above / −below SL) |
|---|---|---|
| MIOCENE (Miocene (undifferentiated)) | 1,978 ft | -1,910 ft |
| FRIO | 2,749 ft | -2,681 ft |
| VICKSBURG | 3,534 ft | -3,466 ft |
| COCKFIELD | 4,676 ft | -4,608 ft |
| FRIO | — | — |
| MIOCENE (Miocene (undifferentiated)) | — | — |
| VICKSBURG | — | — |
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 |
|---|---|
| 4,856–4,862 ft | Perforated |
| 4,856–4,868 ft | Perforated |
| 4,858–4,862 ft | Perforated |
| 4,860–4,864 ft | Perforated |
| 4,877–4,937 ft | Perforated |
| 4,884–4,889 ft | Perforated |
| 4,916–4,921 ft | Perforated |
| 4,928–4,933 ft | Perforated |
| 4,932–4,937 ft | Perforated |
| 5,090–5,096 ft | Perforated |
Casing (4)
| Size | Set Depth | Cement |
|---|---|---|
| 16" | 334 ft | 700 sx |
| 10.75" | 1,019 ft | 825 sx |
| 2.875" | 4,518 ft | — |
| 7" | 5,200 ft | 1,240 sx |
Permit History (1)
Applications (1)
Records & Logs
9 completion filings on record · 2 with log images at RRC.
+3 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
- 311
- Max Depth
- 5,700 ft
- Drill Type
- Vertical
- County
- MONTGOMERY
- District
- 3
- Operator
- HIGHMARK ENERGY OPERATING LLC
- Completed
- 2016-03-24
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