42-329-46084
PRODUCING HorizontalCASS-ERNEST E20U
MIDLAND County · District 8 · PIONEER NATURAL RES. USA INC. · SPRABERRY (TREND AREA)
Permits
2
Max Depth
10,503 ft
First Permit
2023-02-13
Latest Activity
2023-02-13
Lifespan
< 1 yr
Regulatory Status
Schedule
ON SCHEDULE
Completion
2023-11-04
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
2023-11
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 2,839 ft (KB)
CSV| Formation | Top Depth (MD) | Subsea (+above / −below SL) |
|---|---|---|
| SANTA ROSA | 1,141 ft | +1,698 ft |
| RUSTLER | 1,752 ft | +1,087 ft |
| YATES | 2,788 ft | +51 ft |
| SEVEN RIVERS | 3,089 ft | -250 ft |
| QUEEN | 3,886 ft | -1,047 ft |
| GRAYBURG | 4,415 ft | -1,576 ft |
| SAN ANDRES - HIGH FLOWS, H2S, CO (San Andres) | 4,607 ft | -1,768 ft |
| CLEARFORK (Clear Fork) | 7,003 ft | -4,164 ft |
| SPRABERRY | 7,844 ft | -5,005 ft |
| GLORIETA | — | — |
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 |
|---|---|
| 8,617–16,284 ft | Perforated |
Casing (3)
| Size | Set Depth | Cement |
|---|---|---|
| 13.375" | 1,569 ft | 1,750 sx |
| 9.625" | 6,144 ft | 1,465 sx |
| 5.5" | 16,309 ft | 810 sx |
Permit History (2)
Applications (2)
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
- 21H
- Max Depth
- 10,503 ft
- Drill Type
- Horizontal
- County
- MIDLAND
- District
- 8
- Operator
- PIONEER NATURAL RES. USA INC.
- Completed
- 2023-11-04
Operator
- Location
- Y SPRING
- P-5 Status
- Active (filed 2025-08-01)
- Cum Oil (all leases)
- 1,771,882,421 bbl
- Cum Gas (all leases)
- 1,763,727,021 mcf
- Activities
- CSGD/G, CSGD/P, G/PUR, GTHS/G, GTHS/O, OPRS/G, OPRS/O
- Total Permits
- 15,400