WELL · 42-479-34842 · DISTRICT 4

Casso Ltd. #1

Plugged

Webb County · Laredo (Lobo) field · Vertical

Casso Ltd. #1 (API 42-479-34842) is a plugged well in Webb County, plugged February 20, 1996, last operated by Sanchez-O Brien Oil & Gas Corp..

The RRC has issued one drilling permit (amended once), issued April 11, 1989, permitted to 8,900 ft.

Completion filings report 3 formation tops, including Carizzo Wilcox, Wilcox, Lobo.

Operator of record

Sanchez-O Brien Oil & Gas Corp.

Houston, TX · P-5 Y, filed Jul 6, 1998 · 493 permits on file

SOURCE · RRC EWA WELLBORE SCHEDULE

What each RRC source says

Wellbore schedule	Sanchez-O Brien Oil & Gas Corp.
Production reports	Sanchez-O'Brien Oil & Gas Corp.through Aug 1995
Latest permit	Sanchez-O'Brien Oil & Gas Corp.Apr 11, 1989

8,900: total depth, ft
2: permits on file
Apr 11, 1989: last permit issued
May 17, 1989: completed
0: cumulative oil, bbl
177K: cumulative gas, mcf

PRODUCTION FROM PDQ LEASE REPORTS · Jan 1993 THROUGH Feb 1996

Regulatory status · RRC wellbore file

Schedule: OFF SCHEDULE
Completed: May 17, 1989
Shut in: —
Plugged: Feb 20, 1996

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
Casso, Ltd. G-4-131017	Laredo (Lobo)	Sanchez-O'Brien Oil & Gas Corp.	1	0	177K	Jan 1993 – Feb 1996

No volumes reported on these leases in the last three years.

Chain of custody

Every operator that reported production on this well's lease, in order.

1Sanchez-O'Brien Oil & Gas Corp.Jan 1993 → Aug 1995

Permits

Permit	Type	Operator	Received	Issued	Spud	Depth
358032-98	Drill	Sanchez-O'Brien Oil & Gas Corp.	Jun 1, 1989	Apr 11, 1989	—	8,900
358032-99	Drill	Sanchez-O'Brien Oil & Gas Corp.	Apr 11, 1989	Apr 11, 1989	—	8,900

Completions

Completed	Lease	Field	Operator	Status	Depth
—	— G-4-131017	—	—	—	—

Formation tops

As filed on W-2/G-1. Subsea from 499 ft elevation.Download CSV →

Formation	MD ft	Subsea
Carizzo Wilcox	3,435	-2,936
WilcoxLOWER WILCOX	5,260	-4,761
Lobo	7,130	-6,631

Perforations

Perforated and open-hole intervals.

From	To	Type
7,640	7,680	Perforated

Casing

Strings as reported, shallowest first.

Casing in	Set at	Hole in	Cement
10.75	800	14.75	480 S
7.625	5,955	9.875	600 S
2.875	8,405	6.75	510 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. About these reports →

Suffix	Filed	W-2 / G-1 date	Logs referenced
00	Jul 7, 1989	Jun 2, 1989	Yes
00	Jun 30, 1989	—	—

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 42-479-34842 → W-2, G-1, plugging reports, as PDFs
Completion packets for 42-479-34842 → scanned completion filings

Log images are in archives with no per-well link: the RRC's Neubus archive (2004 onward). then paste it into their search.

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/47934842, documented in the API reference.