42-103-34231
PRODUCINGBLOCK 31 UNIT
CRANE County · District 8 · HILCORP ENERGY COMPANY · BLOCK 31 (PENN. 7620)
Permits
4
Max Depth
9,400 ft
First Permit
1993-06-17
Latest Activity
2017-12-11
Lifespan
24 yrs
Regulatory Status
Schedule
ON SCHEDULE
Completion
2017-12-21
Shut-In
—
Plugged
—
P-5 Org Status: X
EWA / Production operator mismatch
Scheduling: HILCORP ENERGY COMPANY ≠ Production: OXY USA INC. (reported 2026-04)
EWA / Permit operator mismatch
Scheduling: HILCORP ENERGY COMPANY ≠ Permit: OXY USA INC.
Resolved via: production → OXY USA INC.
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 (9) Elevation 2,574 ft (GL)
CSV| Formation | Top Depth (MD) | Subsea (+above / −below SL) |
|---|---|---|
| CISCO | 7,162 ft | -4,588 ft |
| CANYON | 7,388 ft | -4,814 ft |
| STRAWN | 7,549 ft | -4,975 ft |
| ATOKA | 7,712 ft | -5,138 ft |
| BARNETT SHALE (Barnett) | 7,768 ft | -5,194 ft |
| MISS LIME (Mississippian) | 8,089 ft | -5,515 ft |
| WOODFORD SHALE (Woodford) | 8,110 ft | -5,536 ft |
| DEVONIAN | 8,277 ft | -5,703 ft |
| DEVONIAN | 8,280 ft | -5,706 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 (2)
| Interval | Type |
|---|---|
| 7,444–7,514 ft | Perforated |
| 8,782–9,074 ft | Perforated |
Casing (3)
| Size | Set Depth | Cement |
|---|---|---|
| 13.375" | 802 ft | 650 sx |
| 8.625" | 3,600 ft | 1,250 sx |
| 5.5" | 9,300 ft | 1,250 sx |
Permit History (4)
BLOCK 31 UNIT · 9,300 ft
2017-12-11
BLOCK 31 UNIT · 9,300 ft
2017-12-11
Spud 2017-01-20
BLOCK 31 UNIT · 9,300 ft
2017-12-11
Spud 2018-01-20
BLOCK 31 UNIT · 9,400 ft
1993-06-17
Spud 1993-07-20
Applications (4)
Records & Logs
3 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
- S 12U
- Max Depth
- 9,400 ft
- Drill Type
- Vertical
- County
- CRANE
- District
- 8
- Operator
- HILCORP ENERGY COMPANY
- Completed
- 2017-12-21
Operator
- Name
- HILCORP ENGY CO
- Location
- HOUSTON
- P-5 Status
- X (filed 2026-03-27)
- Cum Oil (all leases)
- 75,699,281 bbl
- Cum Gas (all leases)
- 1,779,939,645 mcf
- Activities
- CSGD/G, CSGD/P, G/PUR, GTHS/C, GTHS/G, GTHS/O, OPRS/G, OPRS/O
- Total Permits
- 3,435