42-013-35770
Final Completion HorizontalGUAJILLO UNIT 15 SOUTH
ATASCOSA County · District 2 · MARATHON OIL EF LLC
Permits
3
Max Depth
22,000 ft
First Permit
2019-10-25
Latest Activity
2021-11-22
Lifespan
2 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
2022-01
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 230 ft (GR)
CSV| Formation | Top Depth (MD) | Subsea (+above / −below SL) |
|---|---|---|
| QUEEN CITY | 2,741 ft | -2,511 ft |
| REKLAW | 3,094 ft | -2,864 ft |
| CARRIZO | 3,728 ft | -3,498 ft |
| WILCOX - DISPOSAL (Wilcox) | 5,155 ft | -4,925 ft |
| ANACACHO - H2S (Anacacho) | 10,337 ft | -10,107 ft |
| AUSTIN CHALK - H2S, DISPOSAL (Austin Chalk) | 10,586 ft | -10,356 ft |
| BARTOSH | — | — |
| ESCONDIDO - H2S, DISPOSAL (Escondido) | — | — |
| NAVARRO - H2S (Navarro) | — | — |
| OLMOS - DISPOSAL (Olmos) | — | — |
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 |
|---|---|
| 11,285–18,457 ft | Perforated |
Casing (2)
| Size | Set Depth | Cement |
|---|---|---|
| 9.625" | 5,214 ft | 1,576 sx |
| 6" | 18,457 ft | 2,865 sx |
Permit History (3)
Applications (3)
Records & Logs
3 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
- 3H
- Max Depth
- 22,000 ft
- Drill Type
- Horizontal
- County
- ATASCOSA
- District
- 2
- 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