TEXAS · WELLS · WEBB COUNTY · RANCHO BLANCO LEASE · API 42-479-38286 · DISTRICT 04
Rancho Blanco #12
Webb County · Rancho Blanco (Lobo) field · Temp Abandoned · Vertical
Rancho Blanco #12 (API 42-479-38286) is a well in Webb County operated by Columbus Energy LLC, completed February 3, 2003 and listed as temp abandoned on the RRC schedule, shut in November 1, 2024.
The RRC has issued one drilling permit, issued December 19, 2002, permitted to 7,168 ft.
It was permitted by Zachry Exploration, Ltd. and has since transferred to Columbus Energy LLC on the wellbore schedule.
Completion filings report 2 formation tops, including Lobo 3, Lobo 6.
Its lease has reported 1.96K barrels of oil and 860K mcf of gas since February 2003, last reporting volume in December 2025.
Operator of record
Permitted by Zachry Exploration, Ltd.; the EWA schedule now lists a different operator.
- Based in
- Houston, TX
- P-5 status
- Active – Extension (X)
- P-5 last filed
- Jun 2, 2026
- Permits on file
- 51
- Phone
- (832) 432-8540
SOURCE · RRC EWA WELLBORE SCHEDULE
What each RRC source says
| Wellbore schedule | Columbus Energy LLC |
| Production reports | Columbus Energy, LLCthrough Dec 2025 |
| Latest permit | Zachry Exploration, Ltd.Dec 19, 2002 |
The sources disagree, which usually means a transfer or a lease-level production filing by a different entity. Petrora goes with the schedule.
- 7,168
- total depth, ft
- 1
- permits on file
- Dec 19, 2002
- last permit issued
- Feb 3, 2003
- completed
- 1.96K
- cumulative oil, bbl
- 860K
- cumulative gas, mcf
PRODUCTION FROM PDQ LEASE REPORTS · Feb 2003 THROUGH Dec 2025
Regulatory status · RRC wellbore file
- Schedule
- ON SCHEDULE
- Completed
- Feb 3, 2003
- Shut in
- Nov 1, 2024
- Plugged
- —
Operator's P-5 on the schedule: Active – Extension (X)
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 |
|---|---|---|---|---|---|---|
| Rancho Blanco G-4-193121 | Rancho Blanco (Lobo) | Columbus Energy, LLC | 1 | 1.96K | 860K | Feb 2003 – Dec 2025 |
Gas, mcf lease total
Last 12 months 36 · prior 12 1,927(-98%)
Chain of custody
Every operator that reported production on this well's lease, in order.
- 1Zachry Exploration, Ltd.Feb 2003 → Jan 2009
- 2Zachry Exploration, Inc.Feb 2009 → Nov 2009
- 3Zachry Exploration, LLCDec 2009 → Jul 2010
- 4Columbus Energy, LLCAug 2010 → Dec 2025
Permits
| Permit | Type | Operator | Received | Issued | Spud | Depth |
|---|---|---|---|---|---|---|
| 526543-99 | Drill | Zachry Exploration, Ltd. | Dec 19, 2002 | Dec 19, 2002 | Dec 25, 2002 | 7,200 |
Completions
| Completed | Lease | Field | Operator | Status | Depth |
|---|---|---|---|---|---|
| Feb 3, 2003 | Rancho Blanco G-4-193121 | Rancho Blanco (Lobo) | Columbus Energy LLC | Temp Abandoned · shut in Nov 1, 2024 | 7,168 |
Formation tops
As filed on W-2/G-1. Subsea from 434 ft elevation.Download CSV →
| Formation | MD ft | Subsea |
|---|---|---|
| Lobo 3 | 6,534 | -6,100 |
| Lobo 6 | 6,856 | -6,422 |
Perforations
Perforated and open-hole intervals.
| From | To | Type |
|---|---|---|
| 6,538 | 6,560 | Perforated |
| 6,858 | 6,902 | Perforated |
| 6,990 | 6,997 | Perforated |
Casing
Strings as reported, shallowest first.
| Casing in | Set at | Hole in | Cement |
|---|---|---|---|
| 9.625 | 892 | 12.25 | 310 S |
| 7 | 5,715 | 8.75 | 395 S |
| 4.5 | 7,168 | 6.25 | 350 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 15, 2003 | Feb 24, 2003 | Yes |
| 00 | Mar 10, 2003 | — | — |
Well logs
The RRC's map lists this well among those with logs online. Its monthly inventories loaded here, which start in July 2006, list none for it, so none are itemized.
Open the RRC's log search for this well ↗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 42-479-38286 → W-2, G-1, plugging reports, as PDFs
- Completion packets for 42-479-38286 → scanned completion filings
The logs loaded for this well are under Well logs, with the RRC's log search 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/47938286, documented in the API reference.