WELL · 42-481-35118 · DISTRICT 3
O.B. Ranch #1
Wharton County · Red Bull (Cook Mountain) field · Vertical
O.B. Ranch #1 (API 42-481-35118) is a plugged well in Wharton County, plugged July 16, 2025, last operated by Hilcorp Energy Company.
The RRC has issued 2 drilling permits (amended once) between 2010 and 2011, permitted to 15,500 ft.
It was permitted by Caza Operating, LLC and has since transferred to Hilcorp Energy Company on the wellbore schedule.
Completion filings report 2 formation tops, including Cook Mountain, Wilcox.
Operator of record
Permitted by Caza Operating, LLC; the EWA schedule now lists a different operator.
Houston, TX · P-5 Y, filed Mar 26, 2026 · 3,454 permits on file · (713) 209-2411
SOURCE · RRC EWA WELLBORE SCHEDULE
What each RRC source says
| Wellbore schedule | Hilcorp Energy Company |
| Production reports | Hilcorp Energy Companythrough Mar 2017 |
| Latest permit | Caza Operating, LLCNov 30, 2011 |
The sources disagree, which usually means a transfer or a lease-level production filing by a different entity. Petrora goes with the schedule.
- 15,500
- total depth, ft
- 3
- permits on file
- Nov 30, 2011
- last permit issued
- Nov 12, 2010
- completed
- 0
- cumulative oil, bbl
- 276K
- cumulative gas, mcf
PRODUCTION FROM PDQ LEASE REPORTS · Nov 2010 THROUGH Apr 2026
Regulatory status · RRC wellbore file
- Schedule
- OFF SCHEDULE
- Completed
- Nov 12, 2010
- Shut in
- —
- Plugged
- Jul 16, 2025
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 2 leases 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 |
|---|---|---|---|---|---|---|
| O.B. Ranch O-3-25616 | Wharton, W. (CK MTN 11200) | Hilcorp Energy Company | 1 | 0 | 0 | Dec 2010 – Apr 2026 |
| O.B. Ranch G-3-261255 | Wharton, W. (CK MTN 11200) | Hilcorp Energy Company | 1 | 0 | 276K | Nov 2010 – Jul 2025 |
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.
- 1Caza Operating, LLCDec 2010 → Aug 2014
- 2Hilcorp Energy CompanySep 2014 → Mar 2017
Permits
| Permit | Type | Operator | Received | Issued | Spud | Depth |
|---|---|---|---|---|---|---|
| 728931-99 | Field transfer | Caza Operating, LLC | Nov 23, 2011 | Nov 30, 2011 | Jun 21, 2010 | 15,500 |
| 690773-98 | Drill | Caza Operating, LLC | Dec 2, 2010 | Feb 5, 2010 | Jun 18, 2010 | 15,500 |
| 690773-99 | Drill | Caza Operating, LLC | Feb 4, 2010 | Feb 5, 2010 | Jun 18, 2010 | 15,500 |
Completions
| Completed | Lease | Field | Operator | Status | Depth |
|---|---|---|---|---|---|
| — | — G-3-261255 | — | — | — | — |
| — | — O-3-25616 | — | — | — | — |
Formation tops
As filed on W-2/G-1. Subsea from 97 ft elevation.Download CSV →
| Formation | MD ft | Subsea |
|---|---|---|
| Cook MountainUPPER COOK MOUNTAIN | 12,490 | -12,393 |
| Cook MountainUPPER COOK MOUNTAIN | 12,494 | -12,397 |
| Cook MountainLOWER COOK MOUNTAIN | 12,658 | -12,561 |
| Wilcox | 12,900 | -12,803 |
Perforations
Perforated and open-hole intervals.
| From | To | Type |
|---|---|---|
| 12,494 | 12,826 | Perforated |
Casing
Strings as reported, shallowest first.
| Casing in | Set at | Hole in | Cement |
|---|---|---|---|
| 13.375 | 2,500 | 17.5 | 1,905 S |
| 9.625 | 7,587 | 12.25 | 1,055 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 | May 28, 2013 | May 16, 2012 | — |
| 00 | Nov 7, 2011 | Apr 6, 2011 | — |
| 00 | Jan 28, 2011 | Dec 14, 2010 | Yes |
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 42-481-35118 → W-2, G-1, plugging reports, as PDFs
- Completion packets for 42-481-35118 → 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/48135118, documented in the API reference.