42-255-34333
PRODUCING HorizontalCHALLENGER UNIT C
KARNES County · District 2 · MARATHON OIL EF LLC · EAGLEVILLE (EAGLE FORD-2)
Permits
1
Max Depth
18,500 ft
First Permit
2014-11-18
Latest Activity
2014-11-18
Lifespan
< 1 yr
Regulatory Status
Schedule
ON SCHEDULE
Completion
2016-12-23
Shut-In
—
Plugged
—
P-5 Org Status: Active
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
2013-02
Last Production
2026-07
Lease Production
Production is reported at the lease level. View production data, decline curves, and history on the lease page.
Formation Tops (10) Elevation 364 ft (GR)
CSV| Formation | Top Depth (MD) | Subsea (+above / −below SL) |
|---|---|---|
| FRIO - DISPOSAL (Frio) | 3,500 ft | -3,136 ft |
| YEGUA - DISPOSAL (Yegua) | 7,100 ft | -6,736 ft |
| CARRIZO | 7,250 ft | -6,886 ft |
| REKLAW | 7,830 ft | -7,466 ft |
| QUEEN CITY | 7,900 ft | -7,536 ft |
| AUSTIN CHALK - H2S (Austin Chalk) | 10,542 ft | -10,178 ft |
| EAGLE FORD - H2S (Eagle Ford) | 10,791 ft | -10,427 ft |
| EDWARDS - H2S (Edwards) | — | — |
| SLIGO - H2S (Sligo) | — | — |
| WILCOX - DISPOSAL (Wilcox) | — | — |
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 |
|---|---|
| 11,031–16,868 ft | Perforated |
Casing (2)
| Size | Set Depth | Cement |
|---|---|---|
| 9.625" | 5,270 ft | 1,787 sx |
| 5.5" | 16,925 ft | 2,342 sx |
Permit History (1)
Applications (1)
Records & Logs
2 completion filings on record · 2 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
- 9H
- Max Depth
- 18,500 ft
- Drill Type
- Horizontal
- County
- KARNES
- District
- 2
- Operator
- MARATHON OIL EF LLC
- Completed
- 2016-12-23
Operator
- Name
- MARATHON OIL EF LLC
- Location
- HOUSTON
- P-5 Status
- Active (filed 2025-09-26)
- Cum Oil (all leases)
- 409,189,156 bbl
- Cum Gas (all leases)
- 1,029,735,602 mcf
- Activities
- CSGD/G, CSGD/P, G/PUR, GTHS/C, GTHS/G, GTHS/O, OPRS/G, OPRS/O
- Total Permits
- 3,167