WELL · 42-481-32778 · DISTRICT 3
Cockburn Oil Corporation #12
Wharton County · Vertical
Cockburn Oil Corporation #12 (API 42-481-32778) is a permitted well in Wharton County filed by Cockburn Oil Corporation; no completion report is on file yet.
The RRC has issued 3 drilling permits between 1984 and 1988, permitted to 6,000 ft.
Completion filings report 4 formation tops, including Marginulina, Marg. Sand, 5450' Sand, Frio.
Its lease has reported 125K barrels of oil and 24.1K mcf of gas since January 1993, last reporting in July 2026. The lease carries 5 wells, so these are lease totals, not this well alone.
Operator of record
Lubbock, TX · P-5 Y, filed Sep 2, 2022 · 16 permits on file · (713) 208-4400
SOURCE · RRC EWA WELLBORE SCHEDULE
What each RRC source says
| Wellbore schedule | none |
| Production reports | Mosaic Oil LLCthrough Sep 2021 |
| Latest permit | Cockburn Oil CorporationOct 14, 1988 |
- 6,000
- total depth, ft
- 3
- permits on file
- Oct 14, 1988
- last permit issued
- —
- completed
- 125K
- cumulative oil, bbl
- 24.1K
- 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 5 wells in total, so volumes are shared.Why →
| Lease | Field | Reporting operator | Wells | Oil, bbl | Gas, mcf | Reported |
|---|---|---|---|---|---|---|
| Cockburn Oil Corp. O-3-2612 | Lane City | Mosaic Oil LLC | 5 | 125K | 24.1K | Jan 1993 – Jul 2026 |
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.
- 1Cockburn Oil CorporationJan 1993 → May 2003
- 2Camoil, Inc.Sep 2005 → Jan 2018
- 3Mosaic Oil LLCApr 2021 → Sep 2021
Permits
| Permit | Type | Operator | Received | Issued | Spud | Depth |
|---|---|---|---|---|---|---|
| 352151-99 | Recompletion | Cockburn Oil Corporation | Oct 11, 1988 | Oct 14, 1988 | Nov 30, 1988 | 6,000 |
| 270827-99 | Drill | Cockburn Oil Corporation | Feb 28, 1985 | Mar 27, 1985 | — | 5,777 |
| 261593-99 | Drill | Cockburn Oil Corporation | Jan 29, 1985 | Dec 18, 1984 | Jan 30, 1985 | 6,000 |
Completions
| Completed | Lease | Field | Operator | Status | Depth |
|---|---|---|---|---|---|
| — | — O-3-2612 | — | — | — | — |
Formation tops
As filed on W-2/G-1. Subsea from 91 ft elevation.Download CSV →
| Formation | MD ft | Subsea |
|---|---|---|
| Marginulina | 5,342 | -5,251 |
| Marg. Sand | 5,342 | -5,251 |
| 5450' Sand | 5,444 | -5,353 |
| Frio | 5,444 | -5,353 |
Perforations
Perforated and open-hole intervals.
| From | To | Type |
|---|---|---|
| 5,341 | 5,345 | Perforated |
| 5,444 | 5,449 | Perforated |
Casing
Strings as reported, shallowest first.
| Casing in | Set at | Hole in | Cement |
|---|---|---|---|
| 8.625 | 623 | 12.25 | 235 S |
| 5.5 | 5,780 | 7.875 | 560 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 | Aug 19, 1991 | Jul 25, 1991 | Yes |
| 00 | Apr 9, 1985 | Mar 18, 1985 | — |
| 00 | Apr 4, 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 42-481-32778 → W-2, G-1, plugging reports, as PDFs
- Completion packets for 42-481-32778 → 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/48132778, documented in the API reference.