42-317-43553
PRODUCING HorizontalWELCH-COX E39U
MARTIN County · District 8 · PIONEER NATURAL RES. USA INC. · SPRABERRY (TREND AREA)
Permits
3
Max Depth
10,606 ft
First Permit
2021-06-08
Latest Activity
2021-06-08
Lifespan
< 1 yr
Regulatory Status
Schedule
ON SCHEDULE
Completion
2023-10-21
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
2023-05
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 (10) Elevation 2,840 ft (KB)
CSV| Formation | Top Depth (MD) | Subsea (+above / −below SL) |
|---|---|---|
| SANTA ROSA | 1,270 ft | +1,570 ft |
| YATES | 2,608 ft | +232 ft |
| QUEEN | 3,468 ft | -628 ft |
| GRAYBURG | 3,923 ft | -1,083 ft |
| SAN ANDRES - ACTIVE CO2 FLOOD; H (San Andres) | 4,106 ft | -1,266 ft |
| SPRABERRY | 7,554 ft | -4,714 ft |
| DEAN | 8,856 ft | -6,016 ft |
| WOLFCAMP | 9,068 ft | -6,228 ft |
| CISCO | — | — |
| PENNSYLVANIAN | — | — |
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 |
|---|---|
| 9,646–20,027 ft | Perforated |
Casing (3)
| Size | Set Depth | Cement |
|---|---|---|
| 13.375" | 1,710 ft | 1,875 sx |
| 9.625" | 5,580 ft | 1,789 sx |
| 5.5" | 20,052 ft | 1,352 sx |
Permit History (3)
Applications (3)
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 and the UL library can't be deep-linked — clicking copies the API for you to paste.
Well Details
- Well Number
- 321H
- Max Depth
- 10,606 ft
- Drill Type
- Horizontal
- County
- MARTIN
- District
- 8
- Operator
- PIONEER NATURAL RES. USA INC.
- Completed
- 2023-10-21
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
- 15,399