42-103-33966
BLOCK 31 UNIT
CRANE County · District 8 · HILCORP ENERGY COMPANY · BLOCK 31 EAST (ATOKA)
Permits
2
Max Depth
9,250 ft
First Permit
1989-09-13
Latest Activity
1989-09-13
Lifespan
< 1 yr
Regulatory Status
Schedule
OFF SCHEDULE
Completion
1990-01-17
Shut-In
—
Plugged
—
EWA / Production operator mismatch
Scheduling: HILCORP ENERGY COMPANY ≠ Production: OXY USA INC. (reported 2026-04)
EWA / Permit operator mismatch
Scheduling: HILCORP ENERGY COMPANY ≠ Permit: ARCO OIL & GAS CO.
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 (5) Elevation 2,545 ft (GR)
CSV| Formation | Top Depth (MD) | Subsea (+above / −below SL) |
|---|---|---|
| ATOKA | 7,338 ft | -4,793 ft |
| BARNETT SHALE (Barnett) | 7,410 ft | -4,865 ft |
| MISS LIME (Mississippian) | 7,810 ft | -5,265 ft |
| WOODFORD SHALE (Woodford) | 7,840 ft | -5,295 ft |
| DEVONIAN | 8,030 ft | -5,485 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 (5)
| Interval | Type |
|---|---|
| 7,341–7,350 ft | Perforated |
| 8,052–8,972 ft | Perforated |
| 8,504–8,628 ft | Perforated |
| 8,816–8,872 ft | Perforated |
| 8,954–9,036 ft | Perforated |
Casing (6)
| Size | Set Depth | Cement |
|---|---|---|
| 13.375" | 736 ft | 575 sx |
| 13.375" | 736 ft | 575 sx |
| 8.625" | 2,548 ft | 1,250 sx |
| 8.625" | 2,548 ft | 1,250 sx |
| 5.5" | 9,100 ft | 1,250 sx |
| 5.5" | 9,100 ft | 1,250 sx |
Permit History (2)
Applications (2)
Records & Logs
5 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.
No GPS coordinates yet
Well Details
- Well Number
- E 9
- Max Depth
- 9,250 ft
- Drill Type
- Vertical
- County
- CRANE
- District
- 8
- Operator
- HILCORP ENERGY COMPANY
- Completed
- 1990-01-17
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
- 3,439