42-479-39803
PRODUCINGHIRSCH ESTATE 857
WEBB County · District 4 · HILCORP ENERGY COMPANY · BIG COWBOY (LOBO)
Permits
1
Max Depth
9,480 ft
First Permit
2007-04-06
Latest Activity
2007-04-06
Lifespan
< 1 yr
Regulatory Status
Schedule
ON SCHEDULE
Completion
2007-07-07
Shut-In
—
Plugged
—
P-5 Org Status: X
EWA / Permit operator mismatch
Scheduling: HILCORP ENERGY COMPANY ≠ Permit: CONOCOPHILLIPS COMPANY
Resolved via: production → HILCORP ENERGY COMPANY
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
2007-07
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 (2) Elevation 480 ft
CSV| Formation | Top Depth (MD) | Subsea (+above / −below SL) |
|---|---|---|
| BASE LOWER WILCOX (Wilcox) | 7,680 ft | -7,200 ft |
| WILLS POINT | 8,717 ft | -8,237 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 (2)
| Interval | Type |
|---|---|
| 8,062–8,080 ft | Perforated |
| 8,480–8,690 ft | Perforated |
Casing (3)
| Size | Set Depth | Cement |
|---|---|---|
| 9.625" | 595 ft | 270 sx |
| 7" | 7,172 ft | 210 sx |
| 4.5" | 8,981 ft | 210 sx |
Permit History (1)
Applications (1)
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 can't be deep-linked — clicking copies the API for you to paste.
No GPS coordinates yet
Well Details
- Well Number
- 4
- Max Depth
- 9,480 ft
- Drill Type
- Vertical
- County
- WEBB
- District
- 4
- Operator
- HILCORP ENERGY COMPANY
- Completed
- 2007-07-07
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