42-507-32943
PRODUCING HorizontalMARK & SANDRA UNIT
ZAVALA County · District 1 · ATLAS OPERATING LLC · BRISCOE RANCH (EAGLEFORD)
Permits
1
Max Depth
8,400 ft
First Permit
2012-10-17
Latest Activity
2012-10-17
Lifespan
< 1 yr
Regulatory Status
Schedule
ON SCHEDULE
Completion
2012-12-01
Shut-In
—
Plugged
—
P-5 Org Status: H
EWA / Permit operator mismatch
Scheduling: ATLAS OPERATING LLC ≠ Permit: SANCHEZ OIL & GAS CORPORATION
Resolved via: production → ATLAS 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
2012-06
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 (5) Elevation 608 ft (GR)
CSV| Formation | Top Depth (MD) | Subsea (+above / −below SL) |
|---|---|---|
| SAN MIGUEL | 3,301 ft | -2,693 ft |
| ANACACHO | 4,242 ft | -3,634 ft |
| AUSTIN CHALK | 4,542 ft | -3,934 ft |
| BASE AUSTIN CHALK (Austin Chalk) | 5,470 ft | -4,862 ft |
| LOWER EAGLE FORD (Eagle Ford) | 5,850 ft | -5,242 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 |
|---|---|
| 5,983–10,306 ft | Perforated |
Casing (2)
| Size | Set Depth | Cement |
|---|---|---|
| 9.625" | 3,018 ft | 1,045 sx |
| 5.5" | 10,565 ft | 625 sx |
Permit History (1)
Applications (1)
Records & Logs
1 completion filing on record · 1 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
- 3H
- Max Depth
- 8,400 ft
- Drill Type
- Horizontal
- County
- ZAVALA
- District
- 1
- Operator
- ATLAS OPERATING LLC
- Completed
- 2012-12-01
Operator
- Name
- ATLAS OPER LLC
- Location
- HOUSTON
- P-5 Status
- H (filed 2026-03-09)
- Cum Oil (all leases)
- 7,184,429 bbl
- Cum Gas (all leases)
- 10,995,911 mcf
- Activities
- CSGD/G, CSGD/P, G/PUR, GTHS/G, OPRS/G, OPRS/O
- Total Permits
- 78