42-255-31655
Final Completion HorizontalRANCHO GRANDE TRUST UNIT NO. 1
KARNES County · District 2 · MARATHON OIL EF LLC
Permits
5
Max Depth
16,888 ft
First Permit
2010-03-11
Latest Activity
2022-05-23
Lifespan
12 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
2010-06
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 (4) Elevation 298 ft (GR)
CSV| Formation | Top Depth (MD) | Subsea (+above / −below SL) |
|---|---|---|
| ANACACHO | 11,537 ft | -11,239 ft |
| AUSTIN CHALK | 11,697 ft | -11,399 ft |
| EAGLE FORD | 11,933 ft | -11,635 ft |
| EAGLEFORD (Eagle Ford) | 11,933 ft | -11,635 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 ↗
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 (3)
| Interval | Type |
|---|---|
| 11,890–11,933 ft | Perforated |
| 11,890–16,523 ft | Perforated |
| 11,890–16,523 ft | Open hole |
Casing (3)
| Size | Set Depth | Cement |
|---|---|---|
| 9.625" | 6,004 ft | 2,435 sx |
| 5.5" | 11,346 ft | 1,905 sx |
| 4.5" | 16,871 ft | 705 sx |
Permit History (5)
RANCHO GRANDE TRUST UNIT NO. 1 · 16,888 ft
2022-05-23
RANCHO GRANDE TRUST · 16,888 ft
2014-08-26
Spud 2010-03-23
RANCHO GRANDE TRUST 168-1 · 16,888 ft
2012-05-10
Spud 2010-03-23
RANCHO GRANDE TRUST · 12,400 ft
2010-03-11
Spud 2010-03-25
RANCHO GRANDE TRUST 168-1 · 12,400 ft
2010-03-11
Spud 2010-03-23
Applications (5)
Records & Logs
7 completion filings on record · 1 with log images at RRC.
+1 more filings
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
- 1H
- Max Depth
- 16,888 ft
- Drill Type
- Horizontal
- County
- KARNES
- 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