TEXAS · WELLS · FRIO COUNTY · SHINER RANCH LEASE · API 42-163-32975 · DISTRICT 01
Shiner Ranch #4
Frio County · Pearsall (Austin Chalk) field · Horizontal
Shiner Ranch #4 (API 42-163-32975) is a plugged horizontal well in Frio County, plugged July 25, 2024, last operated by Blackbrush O & G LLC.
The RRC has issued one drilling permit, issued January 10, 1991, permitted to 7,650 ft.
It was permitted by Gemini Exploration Company and has since transferred to Blackbrush O & G LLC on the wellbore schedule.
Completion filings report 3 formation tops, including Wilcox, Navarro, Olmos.
Its lease has reported 871K barrels of oil and 387K mcf of gas since January 1993, last reporting volume in July 2024. The lease carries 8 wells, so these are lease totals, not this well alone.
Operator of record
Permitted by Gemini Exploration Company; the EWA schedule now lists a different operator.
- Based in
- San Antonio, TX
- P-5 status
- Active (A)
- P-5 last filed
- Sep 16, 2025
- Permits on file
- 339
- Phone
- (210) 495-5577
SOURCE · RRC EWA WELLBORE SCHEDULE
What each RRC source says
| Wellbore schedule | Blackbrush O & G LLC |
| Production reports | Blackbrush O & G, LLCthrough Jul 2024 |
| Latest permit | Gemini Exploration CompanyJan 10, 1991 |
The sources disagree, which usually means a transfer or a lease-level production filing by a different entity. Petrora goes with the schedule.
- 7,650
- total depth, ft
- 1
- permits on file
- Jan 10, 1991
- last permit issued
- Feb 19, 1991
- completed
- 871K
- cumulative oil, bbl
- 387K
- cumulative gas, mcf
PRODUCTION FROM PDQ LEASE REPORTS · Jan 1993 THROUGH Jul 2024
Regulatory status · RRC wellbore file
- Schedule
- OFF SCHEDULE
- Completed
- Feb 19, 1991
- Shut in
- —
- Plugged
- Jul 25, 2024
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.
Wells nearby
Every well with a location on file around this well, in any state, nearest first.
Texas locations come from drilling permits, so most older Texas wells have none and are not listed.
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 8 wells in total, so volumes are shared.Why →
| Lease | Field | Reporting operator | Wells | Oil, bbl | Gas, mcf | Reported |
|---|---|---|---|---|---|---|
| Shiner Ranch O-1-12693 | Pearsall (Austin Chalk) | Blackbrush O & G, LLC | 8 | 871K | 387K | Jan 1993 – Jul 2024 |
Oil, barrels lease total
Last 12 months 0 · prior 12 7(-100%)
Wells named Shiner Ranch
Blackbrush O & G LLC's other wells filed under this lease name in Frio County, newest permit first. The RRC gives a gas well its own lease number, so the name is what joins the wells of a unit.
Loading the lease's wellsChain of custody
Every operator that reported production on this well's lease, in order.
- 1Gemini Exploration CompanyJan 1993 → Apr 1995
- 2Union Pacific Austin Chalk Co.May 1995 → Dec 1996
- 3Costilla Petroleum CorporationJan 1997 → Jan 1997
- 4Costilla Energy, Inc.Feb 1997 → Mar 1999
- 5Petra Oleum Corp.Apr 1999 → May 2001
- 6Arcadia Expl. & Prod. CompanyJun 2001 → Jul 2001
- 7Triumph Petroleum Company,l.l.c.Aug 2001 → Jan 2005
- 8Blackbrush O & G, Inc.Feb 2005 → Apr 2012
- 9Blackbrush O & G, LLCJun 2012 → Jul 2024
Permits
| Permit | Type | Operator | Received | Issued | Spud | Depth |
|---|---|---|---|---|---|---|
| 383264-99 | Drill | Gemini Exploration Company | Jan 10, 1991 | Jan 10, 1991 | Jan 23, 1991 | 7,650 |
Completions
| Completed | Lease | Field | Operator | Status | Depth |
|---|---|---|---|---|---|
| Feb 19, 1991 | Shiner Ranch O-1-12693 | Pearsall (Austin Chalk) | Blackbrush O & G LLC | Plugged | — |
Formation tops
As filed on W-2/G-1. Subsea from 510 ft elevation.Download CSV →
Perforations
Perforated and open-hole intervals.
| From | To | Type |
|---|---|---|
| 6,970 | 10,634 | Open hole |
Casing
Strings as reported, shallowest first.
| Casing in | Set at | Hole in | Cement |
|---|---|---|---|
| 9.625 | 752 | 12.25 | 308 S |
| 7 | 7,000 | 8.75 | 200 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 | Apr 22, 1991 | Feb 25, 1991 | Yes |
| 00 | Apr 15, 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 42-163-32975 → W-2, G-1, plugging reports, as PDFs
- Completion packets for 42-163-32975 → scanned completion filings
Log images filed since 2004 open from the RRC's log search for this well; none are loaded here 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/16332975, documented in the API reference.