WELL · 42-435-36713 · DISTRICT 7
Mayfield 32 #12
Sutton County · Sawyer (Strawn North) field · SWR-10-Well · Vertical
Mayfield 32 #12 (API 42-435-36713) is a well in Sutton County operated by Upp Operating LLC, completed April 21, 2004 and listed as swr-10-well on the RRC schedule.
The RRC has issued one drilling permit, issued February 20, 2004, permitted to 8,750 ft.
It was permitted by Dominion Oklahoma Texas E&P, Inc and has since transferred to Upp Operating LLC on the wellbore schedule.
Completion filings report 4 formation tops, including Base Cretaceous (marker), Wolfcamp, Canyon, Strawn.
No lease production has been reported under this well’s leases.
Operator of record
Permitted by Dominion Oklahoma Texas E&P, Inc; the EWA schedule now lists a different operator.
- Based in
- Houston, TX
- P-5 status
- Active (A)
- P-5 last filed
- Mar 6, 2026
- Permits on file
- 33
- Phone
- (713) 495-5300
SOURCE · RRC EWA WELLBORE SCHEDULE
What each RRC source says
| Wellbore schedule | Upp Operating LLC |
| Production reports | Upp Operating, LLCthrough Apr 2026 |
| Latest permit | Dominion Oklahoma Texas E&P, IncFeb 20, 2004 |
The sources disagree, which usually means a transfer or a lease-level production filing by a different entity. Petrora goes with the schedule.
- 8,750
- total depth, ft
- 1
- permits on file
- Feb 20, 2004
- last permit issued
- Apr 21, 2004
- completed
- 0
- cumulative oil, bbl
- 245K
- cumulative gas, mcf
PRODUCTION FROM PDQ LEASE REPORTS · Apr 2004 THROUGH Jul 2026
Regulatory status · RRC wellbore file
- Schedule
- ON SCHEDULE
- Completed
- Apr 21, 2004
- 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 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 |
|---|---|---|---|---|---|---|
| Mayfield 32 G-9-206218 | Sawyer (Strawn, North) | Upp Operating, LLC | 1 | 0 | 0 | Apr 2004 – Jul 2026 |
| Mayfield 32 G-9-206405 | Sawyer (Canyon) | Upp Operating, LLC | 1 | 0 | 245K | Apr 2004 – Jul 2026 |
Gas, mcf lease total
Last 12 months 2,198 · prior 12 1,958(+12%)
Chain of custody
Every operator that reported production on this well's lease, in order.
- 1Dominion Oklahoma Texas E&P, IncApr 2004 → Dec 2007
- 2Highmount Expl & Prod Texas LLCJan 2008 → Sep 2014
- 3Enervest Operating, L.L.C.Oct 2014 → Mar 2019
- 4Upp Operating, LLCApr 2019 → Apr 2026
Permits
| Permit | Type | Operator | Received | Issued | Spud | Depth |
|---|---|---|---|---|---|---|
| 542325-99 | Drill | Dominion Oklahoma Texas E&P, Inc | Feb 20, 2004 | Feb 20, 2004 | Mar 19, 2004 | 8,850 |
Completions
| Completed | Lease | Field | Operator | Status | Depth |
|---|---|---|---|---|---|
| — | — G-9-206218 | — | — | — | — |
| — | — G-9-206405 | — | — | — | — |
Formation tops
As filed on W-2/G-1. Subsea from 2,221 ft elevation.Download CSV →
| Formation | MD ft | Subsea |
|---|---|---|
| Base Cretaceous (marker)BASE CRETACEOUS | 818 | 1,403 |
| Wolfcamp | 3,429 | -1,208 |
| Canyon | 6,340 | -4,119 |
| Strawn | 8,100 | -5,879 |
Perforations
Perforated and open-hole intervals.
| From | To | Type |
|---|---|---|
| 6,866 | 7,490 | Perforated |
| 8,014 | 8,686 | Perforated |
Casing
Strings as reported, shallowest first.
| Casing in | Set at | Hole in | Cement |
|---|---|---|---|
| 13.375 | 315 | 17.5 | 296 S |
| 8.625 | 2,412 | 11 | 650 S |
| 4.5 | 8,744 | 7.875 | 670 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 10, 2005 | May 7, 2004 | — |
| 00 | May 9, 2005 | May 7, 2004 | Yes |
| 00 | Feb 25, 2005 | — | — |
| 00 | Feb 15, 2005 | — | — |
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 42-435-36713 → W-2, G-1, plugging reports, as PDFs
- Completion packets for 42-435-36713 → 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/43536713, documented in the API reference.