WELL · 42-163-33100 · DISTRICT 1
Shankle #01
Frio County · Pearsall (Austin Chalk) field · Horizontal
Shankle #01 (API 42-163-33100) is a permitted horizontal well in Frio County filed by Central Texas Oil & Gas; no completion report is on file yet.
The RRC has issued one drilling permit, issued September 5, 1991, permitted to 7,000 ft.
It was permitted by Central Texas Oil & Gas and has since transferred to Frio Oil & Gas Ltd. on the wellbore schedule.
Completion filings report 3 formation tops, including Olmos, Anacacho, Austin Chalk.
Its lease has reported 60.2K barrels of oil and 18 mcf of gas since January 1993, last reporting in July 2026. The lease carries 2 wells, so these are lease totals, not this well alone.
Operator of record
Permitted by Central Texas Oil & Gas; the EWA schedule now lists a different operator.
Austin, TX · P-5 Y, filed Apr 4, 2026 · (512) 422-0866
SOURCE · RRC EWA WELLBORE SCHEDULE
What each RRC source says
| Wellbore schedule | Frio Oil & Gas Ltd. |
| Production reports | Frio Oil & Gas, Ltd.through Apr 2026 |
| Latest permit | Central Texas Oil & GasSep 5, 1991 |
The sources disagree, which usually means a transfer or a lease-level production filing by a different entity. Petrora goes with the schedule.
- 7,000
- total depth, ft
- 1
- permits on file
- Sep 5, 1991
- last permit issued
- —
- completed
- 60.2K
- cumulative oil, bbl
- 18
- cumulative gas, mcf
PRODUCTION FROM PDQ LEASE REPORTS · Jan 1993 THROUGH Jul 2026
Regulatory status · RRC wellbore file
- Schedule
- OFF SCHEDULE
- Completed
- —
- Shut in
- —
- Plugged
- —
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 2 wells in total, so volumes are shared.Why →
| Lease | Field | Reporting operator | Wells | Oil, bbl | Gas, mcf | Reported |
|---|---|---|---|---|---|---|
| Shankle O-1-13275 | Pearsall (Austin Chalk) | Frio Oil & Gas, Ltd. | 2 | 60.2K | 18 | Jan 1993 – Jul 2026 |
Oil, barrels lease total
Last 12 months 1,348 · prior 12 1,431(-6%)
Chain of custody
Every operator that reported production on this well's lease, in order.
- 1Dale Operating CompanyJan 1993 → Mar 1993
- 2Mescalero Energy, Inc.Apr 1993 → Jul 1994
- 3Lasalle Marine CorporationDec 1997 → Mar 2002
- 4Frio Oil & Gas, Ltd.Apr 2002 → Apr 2026
Permits
| Permit | Type | Operator | Received | Issued | Spud | Depth |
|---|---|---|---|---|---|---|
| 391640-99 | Drill | Central Texas Oil & Gas | Sep 5, 1991 | Sep 5, 1991 | Sep 10, 1991 | 7,000 |
Completions
| Completed | Lease | Field | Operator | Status | Depth |
|---|---|---|---|---|---|
| — | — O-1-13275 | — | — | — | — |
| — | — O-1-13275 | — | — | — | — |
Formation tops
As filed on W-2/G-1. Subsea from 480 ft elevation.Download CSV →
| Formation | MD ft | Subsea |
|---|---|---|
| Olmos | 5,035 | -4,555 |
| Anacacho | 6,476 | -5,996 |
| Austin Chalk | 6,635 | -6,155 |
Perforations
Perforated and open-hole intervals.
| From | To | Type |
|---|---|---|
| 6,635 | 6,715 | Perforated |
Casing
Strings as reported, shallowest first.
| Casing in | Set at | Hole in | Cement |
|---|---|---|---|
| 8.625 | 702 | 12.25 | 350 S |
| 5.5 | 6,476 | 7.875 | 740 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 14, 1991 | Oct 9, 1991 | Yes |
| 00 | Nov 13, 1991 | — | — |
| 00 | Oct 31, 1991 | — | — |
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 42-163-33100 → W-2, G-1, plugging reports, as PDFs
- Completion packets for 42-163-33100 → 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/16333100, documented in the API reference.