Permits
3
Max Depth
8,125 ft
First Permit
1982-11-29
Latest Activity
1993-11-18
Lifespan
11 yrs
Regulatory Status
Schedule
OFF SCHEDULE
Completion
—
Shut-In
—
Plugged
—
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 (3) Elevation 73 ft (KB)
CSV| Formation | Top Depth (MD) | Subsea (+above / −below SL) |
|---|---|---|
| MIOCENE (Miocene (undifferentiated)) | 2,000 ft | -1,927 ft |
| ANAHUAC | 5,500 ft | -5,427 ft |
| FRIO | 6,500 ft | -6,427 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 (6)
| Interval | Type |
|---|---|
| 7,470–7,475 ft | Perforated |
| 7,660–7,688 ft | Perforated |
| 7,666–7,669 ft | Perforated |
| 7,680–7,682 ft | Perforated |
| 7,686–7,688 ft | Perforated |
| 7,938–7,944 ft | Perforated |
Casing (4)
| Size | Set Depth | Cement |
|---|---|---|
| 10.75" | 1,574 ft | 800 sx |
| 2.375" | 7,799 ft | — |
| 5.5" | 8,114 ft | 675 sx |
| 5.5" | 8,114 ft | — |
Permit History (3)
Applications (3)
Records & Logs
6 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
- 21A
- Max Depth
- 8,125 ft
- Drill Type
- Vertical
- County
- MATAGORDA
- District
- 3
- Operator
- MARATHON OIL COMPANY
Operator
- Name
- MARATHON OIL CO
- Location
- HOUSTON
- P-5 Status
- Active (filed 2025-08-14)
- Cum Oil (all leases)
- 183,150,113 bbl
- Cum Gas (all leases)
- 1,013,063,895 mcf
- Activities
- CSGD/P, G/PUR
- Total Permits
- 3,707