WELL · 42-029-36588 · DISTRICT 1
Cassin #C18
Bexar County · Monksfield (350 Sand) field · Vertical
Cassin #C18 (API 42-029-36588) is a plugged well in Bexar County, plugged November 14, 2005, last operated by South Loop Operating L.C..
The RRC has issued one drilling permit, issued June 21, 1985, permitted to 990 ft.
It was permitted by R.D. Oil Company and has since transferred to South Loop Operating L.C. on the wellbore schedule.
Its lease has reported 20.7K barrels of oil and 142 mcf of gas since January 1993, last reporting in September 2006. The lease carries 108 wells, so these are lease totals, not this well alone.
Operator of record
Permitted by R.D. Oil Company; the EWA schedule now lists a different operator.
San Antonio, TX · P-5 Y, filed Feb 6, 2009
SOURCE · RRC EWA WELLBORE SCHEDULE
What each RRC source says
| Wellbore schedule | South Loop Operating L.C. |
| Production reports | South Loop Operating, L.C.through Nov 2005 |
| Latest permit | R.D. Oil CompanyJun 21, 1985 |
The sources disagree, which usually means a transfer or a lease-level production filing by a different entity. Petrora goes with the schedule.
- 990
- total depth, ft
- 1
- permits on file
- Jun 21, 1985
- last permit issued
- Jul 11, 1985
- completed
- 20.7K
- cumulative oil, bbl
- 142
- cumulative gas, mcf
PRODUCTION FROM PDQ LEASE REPORTS · Jan 1993 THROUGH Sep 2006
Regulatory status · RRC wellbore file
- Schedule
- OFF SCHEDULE
- Completed
- Jul 11, 1985
- Shut in
- —
- Plugged
- Nov 14, 2005
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; they carry 108 wells in total, so volumes are shared.Why →
| Lease | Field | Reporting operator | Wells | Oil, bbl | Gas, mcf | Reported |
|---|---|---|---|---|---|---|
| Cassin O-1-10570 | Monksfield (350 Sand) | South Loop Operating, L.C. | 108 | 20.7K | 142 | Jan 1993 – Sep 2006 |
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.
- 1South Loop Operating, L.C.May 1993 → Nov 2005
Permits
| Permit | Type | Operator | Received | Issued | Spud | Depth |
|---|---|---|---|---|---|---|
| 278363-99 | Drill | R.D. Oil Company | Jun 7, 1985 | Jun 21, 1985 | — | 990 |
Completions
| Completed | Lease | Field | Operator | Status | Depth |
|---|---|---|---|---|---|
| — | — O-1-10570 | — | — | — | — |
Perforations
Perforated and open-hole intervals.
| From | To | Type |
|---|---|---|
| 240 | 410 | Perforated |
Casing
Strings as reported, shallowest first.
| Casing in | Set at | Hole in | Cement |
|---|---|---|---|
| 4.5 | 125 | 6 | 12 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 | Nov 12, 1985 | Nov 1, 1985 | — |
| 00 | Nov 8, 1985 | — | — |
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 42-029-36588 → W-2, G-1, plugging reports, as PDFs
- Completion packets for 42-029-36588 → 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/02936588, documented in the API reference.