42-013-35337
PRODUCING HorizontalGUAJILLO UNIT 9 SOUTH
ATASCOSA County · District 2 · MARATHON OIL EF LLC · EAGLEVILLE (EAGLE FORD-2)
Permits
1
Max Depth
20,000 ft
First Permit
2015-08-27
Latest Activity
2015-08-27
Lifespan
< 1 yr
Regulatory Status
Schedule
ON SCHEDULE
Completion
2017-01-09
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
2015-12
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 271 ft (GR)
CSV| Formation | Top Depth (MD) | Subsea (+above / −below SL) |
|---|---|---|
| REKLAW | 2,374 ft | -2,103 ft |
| QUEEN CITY | 2,913 ft | -2,642 ft |
| BARTOSH | 3,673 ft | -3,402 ft |
| CARRIZO | 3,914 ft | -3,643 ft |
| WILCOX - DISPOSAL (Wilcox) | 5,202 ft | -4,931 ft |
| NAVARRO - H2S (Navarro) | 8,865 ft | -8,594 ft |
| ESCONDIDO - H2S, DISPOSAL (Escondido) | 9,000 ft | -8,729 ft |
| OLMOS - DISPOSAL (Olmos) | 9,201 ft | -8,930 ft |
| ANACACHO - H2S (Anacacho) | 10,766 ft | -10,495 ft |
| AUSTIN CHALK - H2S, DISPOSAL (Austin Chalk) | 11,007 ft | -10,736 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 |
|---|---|
| 11,313–18,594 ft | Perforated |
Casing (2)
| Size | Set Depth | Cement |
|---|---|---|
| 9.625" | 5,293 ft | 1,670 sx |
| 5.5" | 18,694 ft | 2,110 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
- 4H
- Max Depth
- 20,000 ft
- Drill Type
- Horizontal
- County
- ATASCOSA
- District
- 2
- Operator
- MARATHON OIL EF LLC
- Completed
- 2017-01-09
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
- 3,173