TEXAS · WELLS · COCHRAN COUNTY · DEAN "C" LEASE · API 42-079-32131 · DISTRICT 7B
Dean C #12
Cochran County · Slaughter field · Producing · Vertical
Dean C #12 (API 42-079-32131) is a well in Cochran County operated by Extex Operating Company, completed October 4, 1985 and listed as producing on the RRC schedule.
The RRC has issued one drilling permit, issued August 14, 1985, permitted to 5,100 ft.
It was permitted by Mobil Producing TX. & N.M. Inc. and has since transferred to Extex Operating Company on the wellbore schedule.
Completion filings report 3 formation tops, including Mallet, 1st Slaughter, 2nd Slaughter.
Its lease has reported 133K barrels of oil and 165K mcf of gas since January 1993, last reporting volume in April 2026. The lease carries 14 wells, so these are lease totals, not this well alone.
Operator of record
Permitted by Mobil Producing TX. & N.M. Inc.; the EWA schedule now lists a different operator.
- Based in
- Houston, TX
- P-5 status
- Active (A)
- P-5 last filed
- Jan 7, 2026
- Permits on file
- 117
- Phone
- (713) 953-0824
SOURCE · RRC EWA WELLBORE SCHEDULE
What each RRC source says
| Wellbore schedule | Extex Operating Company |
| Production reports | Extex Operating Companythrough Apr 2026 |
| Latest permit | Mobil Producing TX. & N.M. Inc.Aug 14, 1985 |
The sources disagree, which usually means a transfer or a lease-level production filing by a different entity. Petrora goes with the schedule.
- 5,100
- total depth, ft
- 1
- permits on file
- Aug 14, 1985
- last permit issued
- Oct 4, 1985
- completed
- 133K
- cumulative oil, bbl
- 165K
- cumulative gas, mcf
PRODUCTION FROM PDQ LEASE REPORTS · Jan 1993 THROUGH Apr 2026
Regulatory status · RRC wellbore file
- Schedule
- ON SCHEDULE
- Completed
- Oct 4, 1985
- Shut in
- —
- Plugged
- —
Operator's P-5 on the schedule: Active (A)
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 14 wells in total, so volumes are shared.Why →
| Lease | Field | Reporting operator | Wells | Oil, bbl | Gas, mcf | Reported |
|---|---|---|---|---|---|---|
| Dean "C" O-11-5981 | Slaughter | Extex Operating Company | 14 | 133K | 165K | Jan 1993 – Apr 2026 |
Oil, barrels lease total
Last 12 months 530 · prior 12 676(-22%)
Chain of custody
Every operator that reported production on this well's lease, in order.
- 1Mobil Producing TX. & N.M. Inc.Jan 1993 → Dec 1994
- 2Coda Energy, Inc.Jan 1995 → Aug 1998
- 3Belco Energy Corp.Sep 1998 → Feb 2002
- 4Westport Oil and Gas Company, LPMar 2002 → Nov 2005
- 5Encore Operating, L.P.Dec 2005 → Aug 2009
- 6Encore Energy Partners Oper LLCSep 2009 → Mar 2012
- 7Vanguard Permian, LLCApr 2012 → Apr 2015
- 8Vanguard Operating, LLCMay 2015 → Jun 2019
- 9Grizzly OP of Delaware, LLCSep 2019 → Apr 2020
- 10Extex Operating CompanyMay 2020 → Apr 2026
- 11New Horizon Resources LLCJan 2022 → Sep 2025
Permits
| Permit | Type | Operator | Received | Issued | Spud | Depth |
|---|---|---|---|---|---|---|
| 282452-99 | Drill | Mobil Producing TX. & N.M. Inc. | Aug 14, 1985 | Aug 14, 1985 | — | 5,100 |
Completions
| Completed | Lease | Field | Operator | Status | Depth |
|---|---|---|---|---|---|
| Oct 4, 1985 | Dean C O-11-5981 | Slaughter | Extex Operating Company | Producing | 5,100 |
Formation tops
As filed on W-2/G-1. Subsea from 3,725 ft elevation.Download CSV →
| Formation | MD ft | Subsea |
|---|---|---|
| Mallet | 4,961 | -1,236 |
| 1ST Slaughter | 5,000 | -1,275 |
| 2ND Slaughter | 5,064 | -1,339 |
Perforations
Perforated and open-hole intervals.
| From | To | Type |
|---|---|---|
| 5,002 | 5,050 | Perforated |
| 5,064 | 5,092 | Perforated |
Casing
Strings as reported, shallowest first.
| Casing in | Set at | Hole in | Cement |
|---|---|---|---|
| 8.625 | 455 | 12.25 | 350 S |
| 5.5 | 5,100 | 7.875 | 1,550 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 | Nov 5, 1985 | Oct 25, 1985 | Yes |
| 00 | Nov 1, 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 42-079-32131 → W-2, G-1, plugging reports, as PDFs
- Completion packets for 42-079-32131 → 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/07932131, documented in the API reference.