42-003-47818
PRODUCING HorizontalUL MASON EAST UNIT
ANDREWS County · District 8 · DIAMONDBACK E&P LLC · SPRABERRY (TREND AREA)
Permits
1
Max Depth
10,412 ft
First Permit
2018-05-14
Latest Activity
2018-05-14
Lifespan
< 1 yr
Regulatory Status
Schedule
ON SCHEDULE
Completion
2021-03-05
Shut-In
—
Plugged
—
P-5 Org Status: X
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
2017-03
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 2,956 ft (GL)
CSV| Formation | Top Depth (MD) | Subsea (+above / −below SL) |
|---|---|---|
| YATES | 3,085 ft | -129 ft |
| SEVEN RIVERS | 3,306 ft | -350 ft |
| GRAYBURG | 4,181 ft | -1,225 ft |
| SAN ANDRES - CO2 FLOOD, HIGH FLO (San Andres) | 4,620 ft | -1,664 ft |
| HOLT | 5,319 ft | -2,363 ft |
| GLORIETA | 5,414 ft | -2,458 ft |
| CLEARFORK (Clear Fork) | 6,604 ft | -3,648 ft |
| PERMIAN DETRITAL (Permian (undifferentiated)) | — | — |
| QUEEN | — | — |
| TUBB | — | — |
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 |
|---|---|
| 9,852–17,510 ft | Perforated |
Casing (3)
| Size | Set Depth | Cement |
|---|---|---|
| 13.375" | 1,829 ft | 1,460 sx |
| 9.625" | 6,979 ft | 1,770 sx |
| 5.5" | 17,630 ft | 2,755 sx |
Permit History (1)
Applications (1)
Records & Logs
2 completion filings on record · 2 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
- 12LS
- Max Depth
- 10,412 ft
- Drill Type
- Horizontal
- County
- ANDREWS
- District
- 8
- Operator
- DIAMONDBACK E&P LLC
- Completed
- 2021-03-05
Operator
- Name
- DIAMONDBACK E&P LLC
- Location
- MIDLAND
- P-5 Status
- X (filed 2026-05-04)
- Cum Oil (all leases)
- 986,290,193 bbl
- Cum Gas (all leases)
- 41,995,553 mcf
- Activities
- GTHS/C, GTHS/O, OPRS/G, OPRS/O
- Total Permits
- 5,075