42-507-33310
PRODUCING HorizontalSOLA VACA NORTE
ZAVALA County · District 1 · U.S. ENERGY DEVELOPMENT CORP · BRISCOE RANCH (EAGLEFORD)
Permits
4
Max Depth
9,000 ft
First Permit
2017-12-07
Latest Activity
2017-12-07
Lifespan
< 1 yr
Regulatory Status
Schedule
ON SCHEDULE
Completion
2020-10-06
Shut-In
—
Plugged
—
P-5 Org Status: Active
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
2019-05
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 (6) Elevation 618 ft (GL)
CSV| Formation | Top Depth (MD) | Subsea (+above / −below SL) |
|---|---|---|
| ESCONDIDO - DISPOSAL (Escondido) | 2,900 ft | -2,282 ft |
| OLMOS | 3,830 ft | -3,212 ft |
| SAN MIGUEL | 4,428 ft | -3,810 ft |
| ANACACHO | 4,736 ft | -4,118 ft |
| AUSTIN CHALK | 5,150 ft | -4,532 ft |
| EAGLEFORD (Eagle Ford) | 5,636 ft | -5,018 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 (1)
| Interval | Type |
|---|---|
| 6,274–16,488 ft | Perforated |
Casing (2)
| Size | Set Depth | Cement |
|---|---|---|
| 9.625" | 2,610 ft | 965 sx |
| 5.5" | 16,595 ft | 3,470 sx |
Permit History (4)
Applications (4)
Records & Logs
2 completion filings 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.
Well Details
- Well Number
- A 4EF
- Max Depth
- 9,000 ft
- Drill Type
- Horizontal
- County
- ZAVALA
- District
- 1
- Operator
- U.S. ENERGY DEVELOPMENT CORP
- Completed
- 2020-10-06
Operator
- Name
- U.S. ENGY DEV CORP
- Location
- FORT WORTH
- P-5 Status
- Active (filed 2026-02-18)
- Cum Oil (all leases)
- 14,882,303 bbl
- Cum Gas (all leases)
- 30,585,425 mcf
- Activities
- OPRS/G, OPRS/O
- Total Permits
- 225