WELL · 42-215-31567 · DISTRICT 4
Casas Unit #1
Hidalgo County · EL Staggs (4100) field · Vertical
Casas Unit #1 (API 42-215-31567) is a plugged well in Hidalgo County, plugged February 14, 2002, last operated by South Texas Operating Company.
The RRC has issued one drilling permit, issued November 21, 1984, permitted to 4,400 ft.
It was permitted by Price Drilling CO. and has since transferred to South Texas Operating Company on the wellbore schedule.
Completion filings report 5 formation tops, including Caliche, Catahoula, Oakville, Miocene (undifferentiated).
Operator of record
Permitted by Price Drilling Co.; the EWA schedule now lists a different operator.
San Antonio, TX · P-5 Y, filed Nov 4, 2025 · 18 permits on file · (210) 827-2509
SOURCE · RRC EWA WELLBORE SCHEDULE
What each RRC source says
| Wellbore schedule | South Texas Operating Company |
| Production reports | South Texas Operating Companythrough Jul 1998 |
| Latest permit | Price Drilling Co.Nov 21, 1984 |
The sources disagree, which usually means a transfer or a lease-level production filing by a different entity. Petrora goes with the schedule.
- 4,400
- total depth, ft
- 1
- permits on file
- Nov 21, 1984
- last permit issued
- Feb 6, 1985
- completed
- 0
- cumulative oil, bbl
- 58.5K
- cumulative gas, mcf
PRODUCTION FROM PDQ LEASE REPORTS · Jan 1993 THROUGH Feb 2002
Regulatory status · RRC wellbore file
- Schedule
- OFF SCHEDULE
- Completed
- Feb 6, 1985
- Shut in
- —
- Plugged
- Feb 14, 2002
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 |
|---|---|---|---|---|---|---|
| Casas Unit G-4-115205 | EL Staggs (4100) | South Texas Operating Company | 1 | 0 | 58.5K | Jan 1993 – Feb 2002 |
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 Texas Operating CompanyJan 1993 → Jul 1998
Permits
| Permit | Type | Operator | Received | Issued | Spud | Depth |
|---|---|---|---|---|---|---|
| 258536-99 | Drill | Price Drilling Co. | Nov 21, 1984 | Nov 21, 1984 | Nov 28, 1984 | 4,400 |
Completions
| Completed | Lease | Field | Operator | Status | Depth |
|---|---|---|---|---|---|
| — | — G-4-115205 | — | — | — | — |
Formation tops
As filed on W-2/G-1. Subsea from 187 ft elevation.Download CSV →
| Formation | MD ft | Subsea |
|---|---|---|
| Caliche | 1 | 186 |
| Catahoula | 450 | -263 |
| Oakville | 2,200 | -2,013 |
| Miocene (undifferentiated)MIOCENE | 2,710 | -2,523 |
| FrioUPPER FRIO | 3,300 | -3,113 |
Perforations
Perforated and open-hole intervals.
| From | To | Type |
|---|---|---|
| 4,328 | 4,339 | Perforated |
Casing
Strings as reported, shallowest first.
| Casing in | Set at | Hole in | Cement |
|---|---|---|---|
| 8.625 | 433 | 12.25 | 245 S |
| 4.5 | 4,400 | 7.875 | 656 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 | Mar 18, 1985 | Feb 28, 1985 | — |
| 00 | Mar 14, 1985 | Feb 10, 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 42-215-31567 → W-2, G-1, plugging reports, as PDFs
- Completion packets for 42-215-31567 → 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/21531567, documented in the API reference.