42-493-32275
Final Completion HorizontalSCHIFFERS RANCH
WILSON County · District 1 · FIRST ROCK INC. · MARCELINA CREEK (BUDA)
Permits
6
Max Depth
9,000 ft
First Permit
1991-01-17
Latest Activity
2013-09-19
Lifespan
23 yrs
Regulatory Status
Schedule
OFF SCHEDULE
Completion
1999-08-12
Shut-In
—
Plugged
—
EWA / Production operator mismatch
Scheduling: FIRST ROCK INC. ≠ Production: FIRST LIGHT OPERATING, LLC (reported 2026-04)
Resolved via: production → FIRST LIGHT OPERATING, LLC
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
1993-01
Last Production
2026-07
Operator History
Chain of Custody
Lease Production
Production is reported at the lease level. View production data, decline curves, and history on the lease page.
Formation Tops (13) Elevation 430 ft (KB)
CSV| Formation | Top Depth (MD) | Subsea (+above / −below SL) |
|---|---|---|
| CARRIZO SANDSTONE (Carrizo) | 1,775 ft | -1,345 ft |
| MIDWAY SHALE (Midway) | 4,680 ft | -4,250 ft |
| MIDWAY | 4,840 ft | -4,410 ft |
| TAYLOR | 6,020 ft | -5,590 ft |
| ANACACHO | 6,808 ft | -6,378 ft |
| ANACACHO LS (Anacacho) | 6,808 ft | -6,378 ft |
| AUSTIN CHALK | 6,978 ft | -6,548 ft |
| AUSTIN CHALK | 6,995 ft | -6,565 ft |
| EAGLEFORD (Eagle Ford) | 7,238 ft | -6,808 ft |
| EAGLE FORD SHALE (Eagle Ford) | 7,238 ft | -6,808 ft |
| EAGLEFORD SHALE (Eagle Ford) | 7,238 ft | -6,808 ft |
| BUDA | 7,315 ft | -6,885 ft |
| BUDA LIMESTONE (Buda) | 7,315 ft | -6,885 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 (4)
| Interval | Type |
|---|---|
| 6,770–8,569 ft | Open hole |
| 6,893–7,200 ft | Perforated |
| 7,065–7,140 ft | Perforated |
| 7,180–7,293 ft | Perforated |
Casing (4)
| Size | Set Depth | Cement |
|---|---|---|
| 8.625" | 796 ft | 335 sx |
| 5.5" | 4,538 ft | 860 sx |
| 5.5" | 7,310 ft | 200 sx |
| 5.5" | 7,315 ft | 200 sx |
Permit History (6)
SCHIFFERS · 7,500 ft
2013-09-19
Spud 2013-10-08
SCHIFFERS RANCH · 7,500 ft
1999-06-18
Spud 1999-07-02
SCHIFFERS RANCH · 9,000 ft
1997-04-09
Spud 1997-08-05
SCHIFFERS RANCH · 7,345 ft
1997-04-09
SCHIFFERS RANCH · 7,450 ft
1991-01-17
Spud 1991-01-22
SCHIFFERS RANCH · 7,450 ft
1991-01-17
Applications (6)
Records & Logs
9 completion filings on record · 4 with log images at RRC.
+3 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.
No GPS coordinates yet
Well Details
- Well Number
- 5
- Max Depth
- 9,000 ft
- Drill Type
- Horizontal
- County
- WILSON
- District
- 1
- Operator
- FIRST ROCK INC.
- Completed
- 1999-08-12
Operator
- Name
- FIRST ROCK, INC
- Location
- CORPUS CHRI, ST
- P-5 Status
- Active (filed 2026-04-06)
- Cum Oil (all leases)
- 1,171,762 bbl
- Cum Gas (all leases)
- 823,441 mcf
- Activities
- CSGD/P, G/PUR, OPRS/O
- Total Permits
- 68