42-013-35050
Final Completion HorizontalGUAJILLO EAST
ATASCOSA County · District 1 · MARATHON OIL EF LLC
Permits
2
Max Depth
20,000 ft
First Permit
2014-06-28
Latest Activity
2018-10-05
Lifespan
4 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
2014-03
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 258 ft (GR)
CSV| Formation | Top Depth (MD) | Subsea (+above / −below SL) |
|---|---|---|
| QUEEN CITY | 2,890 ft | -2,632 ft |
| REKLAW | 3,252 ft | -2,994 ft |
| BARTOSH | 3,651 ft | -3,393 ft |
| CARRIZO | 3,892 ft | -3,634 ft |
| WILCOX - DISPOSAL (Wilcox) | 5,182 ft | -4,924 ft |
| NAVARRO - H2S (Navarro) | 8,842 ft | -8,584 ft |
| OLMOS - DISPOSAL (Olmos) | 9,178 ft | -8,920 ft |
| ANACACHO - H2S (Anacacho) | 10,665 ft | -10,407 ft |
| AUSTIN CHALK - H2S, DISPOSAL (Austin Chalk) | 10,879 ft | -10,621 ft |
| ESCONDIDO - H2S, DISPOSAL (Escondido) | — | — |
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 ↗
Offset Well Tops (nearest 8 wells with tops)
What nearby completed wells reported.
Nearest wells within 10 mi (surface locations). Click wells to select them, then open the cross-section to compare tops side by side (max 6 wells per section, including this one).
Perforations (1)
| Interval | Type |
|---|---|
| 11,790–15,398 ft | Perforated |
Casing (2)
| Size | Set Depth | Cement |
|---|---|---|
| 9.625" | 5,264 ft | 1,684 sx |
| 5.5" | 15,447 ft | 2,955 sx |
Permit History (2)
Applications (2)
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.
Well Details
- Well Number
- 7H
- Max Depth
- 20,000 ft
- Drill Type
- Horizontal
- County
- ATASCOSA
- District
- 1
- Operator
- MARATHON OIL EF LLC
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
- 3,166