WELL · 42-435-35666 · DISTRICT 7
Mayfield 45 #15
Sutton County · Sawyer (Strawn North) field · SWR-10-Well · Vertical
Mayfield 45 #15 (API 42-435-35666) is a well in Sutton County operated by Upp Operating LLC, completed December 15, 2001 and listed as swr-10-well on the RRC schedule.
The RRC has issued one drilling permit (amended once), issued November 1, 2001, permitted to 8,425 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.
Houston, TX · P-5 Active, filed Mar 6, 2026 · 33 permits on file · (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, IncNov 1, 2001 |
The sources disagree, which usually means a transfer or a lease-level production filing by a different entity. Petrora goes with the schedule.
- 8,425
- total depth, ft
- 2
- permits on file
- Nov 1, 2001
- last permit issued
- Dec 15, 2001
- completed
- 0
- cumulative oil, bbl
- 326K
- cumulative gas, mcf
PRODUCTION FROM PDQ LEASE REPORTS · Dec 2001 THROUGH Jul 2026
Regulatory status · RRC wellbore file
- Schedule
- ON SCHEDULE
- Completed
- Dec 15, 2001
- Shut in
- —
- Plugged
- —
Operator's P-5 on the schedule: Active
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 45 G-9-188416 | Sawyer (Canyon) | Upp Operating, LLC | 1 | 0 | 326K | Dec 2001 – Jul 2026 |
| Mayfield 45 G-9-188417 | Sawyer (Strawn, North) | Upp Operating, LLC | 1 | 0 | 0 | Dec 2001 – Jul 2026 |
Gas, mcf lease total
Last 12 months 3,543 · prior 12 3,757(-6%)
Chain of custody
Every operator that reported production on this well's lease, in order.
- 1Dominion Oklahoma Texas E&P, IncDec 2001 → 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 |
|---|---|---|---|---|---|---|
| 514979-98 | Drill | Dominion Oklahoma Texas E&P, Inc | Oct 24, 2002 | Nov 1, 2001 | Nov 24, 2001 | 8,425 |
| 514979-99 | Drill | Dreyfus, Louis Natural Gas Corp | Nov 1, 2001 | Nov 1, 2001 | — | 8,425 |
Completions
| Completed | Lease | Field | Operator | Status | Depth |
|---|---|---|---|---|---|
| — | — G-9-188416 | — | — | — | — |
| — | — G-9-188417 | — | — | — | — |
Formation tops
As filed on W-2/G-1. Subsea from 2,229 ft elevation.Download CSV →
| Formation | MD ft | Subsea |
|---|---|---|
| Base Cretaceous (marker)BASE CRETACEOUS | 812 | 1,417 |
| Wolfcamp | 3,405 | -1,176 |
| Canyon | 6,090 | -3,861 |
| Strawn | 7,591 | -5,362 |
Perforations
Perforated and open-hole intervals.
| From | To | Type |
|---|---|---|
| 6,092 | 7,126 | Perforated |
| 7,593 | 7,698 | Perforated |
Casing
Strings as reported, shallowest first.
| Casing in | Set at | Hole in | Cement |
|---|---|---|---|
| 13.375 | 270 | 17.5 | 293 S |
| 8.625 | 2,411 | 11 | 725 S |
| 4.5 | 7,921 | 7.875 | 600 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 22, 2003 | Apr 12, 2002 | — |
| 00 | Feb 20, 2003 | Apr 12, 2002 | Yes |
| 00 | May 8, 2002 | — | — |
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 42-435-35666 → W-2, G-1, plugging reports, as PDFs
- Completion packets for 42-435-35666 → 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/43535666, documented in the API reference.