42-173-31359
Final CompletionBLALOCK, LOIS
GLASSCOCK County · District 8 · ROYALTY LAND & DEV. CO., INC.
Permits
6
Max Depth
11,500 ft
First Permit
1982-10-19
Latest Activity
2009-04-29
Lifespan
27 yrs
Regulatory Status
Schedule
OFF SCHEDULE
Completion
—
Shut-In
—
Plugged
—
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
1993-01
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 (7) Elevation 2,526 ft (GR)
CSV| Formation | Top Depth (MD) | Subsea (+above / −below SL) |
|---|---|---|
| CLEARFORK (Clear Fork) | 5,604 ft | -3,078 ft |
| SPRABERRY | 6,531 ft | -4,005 ft |
| SPRAYBERRY (Spraberry) | 6,531 ft | -4,005 ft |
| WOLFCAMP | 8,317 ft | -5,791 ft |
| WOODFORD | 10,602 ft | -8,076 ft |
| DEVONIAN | 10,655 ft | -8,129 ft |
| FUSSELMAN | 10,954 ft | -8,428 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 (11)
| Interval | Type |
|---|---|
| 5,978–5,980 ft | Perforated |
| 5,978–6,039 ft | Perforated |
| 5,990–6,000 ft | Perforated |
| 6,010–6,015 ft | Perforated |
| 6,017–6,024 ft | Perforated |
| 6,026–6,030 ft | Perforated |
| 6,034–6,039 ft | Perforated |
| 8,297–8,930 ft | Perforated |
| 8,468–8,474 ft | Perforated |
| 8,920–8,930 ft | Perforated |
| 10,952–10,984 ft | Perforated |
Casing (5)
| Size | Set Depth | Cement |
|---|---|---|
| 13.375" | 337 ft | 400 sx |
| 13.375" | 660 ft | 400 sx |
| 9.625" | 4,445 ft | 1,250 sx |
| 2.375" | 10,850 ft | — |
| 5.5" | 11,056 ft | 950 sx |
Permit History (6)
BLALOCK, LOIS · 11,056 ft
2009-04-29
Spud 2009-04-29
BLALOCK, LOIS · 11,056 ft
2009-03-09
Spud 1986-10-29
BLALOCK, LOIS · 11,056 ft
2009-03-03
BLALOCK, LOIS · 11,056 ft
1986-10-21
BLALOCK, LOIS · 11,056 ft
1983-11-09
BLALOCK, LOIS · 11,500 ft
1982-10-19
Applications (6)
Records & Logs
6 completion filings on record · 2 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
- 4
- Max Depth
- 11,500 ft
- Drill Type
- Vertical
- County
- GLASSCOCK
- District
- 8
- Operator
- ROYALTY LAND & DEV. CO., INC.
Operator
- Location
- WOLFFORTH
- P-5 Status
- Active (filed 2025-12-23)
- Cum Oil (all leases)
- 662,038 bbl
- Cum Gas (all leases)
- 976,717 mcf
- Activities
- OPRS/O
- Total Permits
- 32