TEXAS · WELLS · ZAPATA COUNTY · CASSIN, EDWARD LEASE · API 42-505-35231 · DISTRICT 04
Cassin Edward #5
Zapata County · Cisco-Benavides (Lobo Cons.) field · Producing · Vertical
Cassin Edward #5 (API 42-505-35231) is a well in Zapata County operated by Hilcorp Energy Company, completed May 17, 2005 and listed as producing on the RRC schedule.
The RRC has issued one drilling permit, issued March 4, 2005, permitted to 12,330 ft.
It was permitted by Conocophillips Company and has since transferred to Hilcorp Energy Company on the wellbore schedule.
Completion filings report 3 formation tops, including Perdido, Wilcox, Wills Point.
Its lease has reported 9 barrels of oil and 1.84M mcf of gas since May 2005, last reporting volume in April 2026.
Operator of record
Permitted by Conocophillips Company; the EWA schedule now lists a different operator.
- Based in
- Houston, TX
- P-5 status
- Active – Extension (X)
- P-5 last filed
- Mar 27, 2026
- Permits on file
- 3,458
- Phone
- (713) 209-2400
SOURCE · RRC EWA WELLBORE SCHEDULE
What each RRC source says
| Wellbore schedule | Hilcorp Energy Company |
| Production reports | Hilcorp Energy Companythrough Apr 2026 |
| Latest permit | Conocophillips CompanyMar 4, 2005 |
The sources disagree, which usually means a transfer or a lease-level production filing by a different entity. Petrora goes with the schedule.
- 12,330
- total depth, ft
- 1
- permits on file
- Mar 4, 2005
- last permit issued
- May 17, 2005
- completed
- 9
- cumulative oil, bbl
- 1.84M
- cumulative gas, mcf
PRODUCTION FROM PDQ LEASE REPORTS · May 2005 THROUGH Apr 2026
Regulatory status · RRC wellbore file
- Schedule
- ON SCHEDULE
- Completed
- May 17, 2005
- Shut in
- —
- Plugged
- —
Operator's P-5 on the schedule: Active (A)
Surface location
No coordinates on the permit record yet. The RRC's GIS record usually lands within days of issuance; historical master-file permits never carry one.
Lease production
PDQ LEASE REPORTS · REPORTED THROUGH APR 2026
Texas reports oil by lease, not by well. These are the lease this well is completed on; this well is the only one on it.Why →
| Lease | Field | Reporting operator | Wells | Oil, bbl | Gas, mcf | Reported |
|---|---|---|---|---|---|---|
| Cassin, Edward G-4-212344 | Cisco-Benavides (Lobo Cons.) | Hilcorp Energy Company | 1 | 9 | 1.84M | May 2005 – Apr 2026 |
Gas, mcf lease total
Last 12 months 23,901 · prior 12 28,091(-15%)
Chain of custody
Every operator that reported production on this well's lease, in order.
- 1Conocophillips CompanyMay 2005 → Dec 2015
- 2Hilcorp Energy CompanyJan 2016 → Apr 2026
Permits
| Permit | Type | Operator | Received | Issued | Spud | Depth |
|---|---|---|---|---|---|---|
| 558456-99 | Drill | Conocophillips Company | Mar 3, 2005 | Mar 4, 2005 | Mar 22, 2005 | 12,900 |
Completions
| Completed | Lease | Field | Operator | Status | Depth |
|---|---|---|---|---|---|
| May 17, 2005 | Cassin Edward G-4-212344 | Cisco-Benavides (Lobo Cons.) | Hilcorp Energy Company | Producing | 12,330 |
Formation tops
As filed on W-2/G-1. Subsea from 473 ft elevation.Download CSV →
| Formation | MD ft | Subsea |
|---|---|---|
| Perdido | 7,145 | -6,672 |
| WilcoxBASE LOWER WILCOX | 9,887 | -9,414 |
| Wills Point | 11,967 | -11,494 |
Perforations
Perforated and open-hole intervals.
| From | To | Type |
|---|---|---|
| 10,389 | 10,484 | Perforated |
| 10,550 | 10,649 | Perforated |
| 11,286 | 11,508 | Perforated |
| 11,792 | 11,883 | Perforated |
Casing
Strings as reported, shallowest first.
| Casing in | Set at | Hole in | Cement |
|---|---|---|---|
| 13.375 | 595 | 17.5 | 490 S |
| 9.625 | 4,645 | 12.25 | 400 S |
| 7 | 7,963 | 8.75 | 190 S |
| 4.5 | 12,315 | 6.25 | 214 S |
Completion filings
W-2 and G-1 reports on record in the RRC wellbore file, newest first. The suffix identifies the wellbore or completion event. The record date is the RRC's own date on the record, not the day the report was filed: 462,034 of the state's filings carry 1984-01-12. About these reports →
| Suffix | RRC record date | W-2 / G-1 date | Logs referenced |
|---|---|---|---|
| 00 | Jan 27, 2006 | Aug 29, 2005 | Yes |
| 00 | Nov 29, 2005 | — | — |
Well logs
The RRC's map lists this well among those with logs online. Its monthly inventories loaded here, which start in July 2006, list none for it, so none are itemized.
Open the RRC's log search for this well ↗The source documents
Petrora holds the structured record. The scanned filings live at the RRC; these links open its search already filled in for this API.
- Wellbore filings for 42-505-35231 → W-2, G-1, plugging reports, as PDFs
- Completion packets for 42-505-35231 → scanned completion filings
The logs loaded for this well are under Well logs, with the RRC's log search for it.
About this data
Permits from the RRC OGA049M master and daily daf420 files; wellbore and operator of record from the EWA schedule, weekly; completions, formation tops, casing, and perforations from the dbf900 wellbore file; production from PDQ lease reports, which lag two to three months; injection from UIC permits, H-10 reports, and TexNet daily volumes; earthquakes from the TexNet catalog.
New to these records? How to read a well page · API numbers · completion reports and tops · why production is by lease
Developers: this page as JSON is GET /v1/data/wells/50535231, documented in the API reference.