WELL · 42-435-35053 · DISTRICT 7
Mayfield 39 #15
Sutton County · Sawyer (Canyon) field · Vertical
Mayfield 39 #15 (API 42-435-35053) is a well in Sutton County operated by Enervest Operating L.L.C., completed March 2, 2000.
The RRC has issued 2 drilling permits between 2000 and 2013, permitted to 8,500 ft.
It was permitted by Highmount Expl & Prod Texas LLC and has since transferred to Enervest Operating L.L.C. on the wellbore schedule.
Completion filings report 5 formation tops, including Base Cretaceous (marker), Leonard, Wolfcamp, Canyon.
No lease production has been reported under this well’s leases.
Operator of record
Permitted by Highmount Expl & Prod Texas LLC; the EWA schedule now lists a different operator.
Houston, TX · P-5 Y, filed Oct 4, 2025 · 1,249 permits on file · (713) 659-3500
SOURCE · RRC EWA WELLBORE SCHEDULE
What each RRC source says
| Wellbore schedule | Enervest Operating L.L.C. |
| Production reports | Upp Operating, LLCthrough Apr 2026 |
| Latest permit | Highmount Expl & Prod Texas LLCSep 18, 2013 |
The sources disagree, which usually means a transfer or a lease-level production filing by a different entity. Petrora goes with the schedule.
- 8,500
- total depth, ft
- 2
- permits on file
- Sep 18, 2013
- last permit issued
- Mar 2, 2000
- completed
- 0
- cumulative oil, bbl
- 90.5K
- cumulative gas, mcf
PRODUCTION FROM PDQ LEASE REPORTS · Mar 2000 THROUGH Jul 2026
Regulatory status · RRC wellbore file
- Schedule
- OFF SCHEDULE
- Completed
- Mar 2, 2000
- 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 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 39 G-9-280290 | Fawcett (Wolfcamp) | Upp Operating, LLC | 1 | 0 | 16.8K | Jun 2014 – Jul 2026 |
| Mayfield 39 G-9-177097 | Sawyer (Canyon) | Enervest Operating, L.L.C. | 1 | 0 | 73.7K | Mar 2000 – Mar 2016 |
Gas, mcf lease total
Last 12 months 1,670 · prior 12 0
Chain of custody
Every operator that reported production on this well's lease, in order.
- 1Dreyfus, Louis Natural Gas CorpMar 2000 → Nov 2001
- 2Dominion Oklahoma Texas E&P, IncDec 2001 → Dec 2007
- 3Highmount Expl & Prod Texas LLCJan 2008 → Oct 2013
- 4Enervest Operating, L.L.C.Jun 2014 → Nov 2018
- 5Upp Operating, LLCMay 2019 → Apr 2026
Permits
| Permit | Type | Operator | Received | Issued | Spud | Depth |
|---|---|---|---|---|---|---|
| 769758-99 | Recompletion | Highmount Expl & Prod Texas LLC | Sep 10, 2013 | Sep 18, 2013 | Oct 8, 2013 | 8,500 |
| 491509-99 | Drill | Dreyfus, Louis Natural Gas Corp | Jan 27, 2000 | Jan 27, 2000 | Feb 7, 2000 | 8,450 |
Completions
| Completed | Lease | Field | Operator | Status | Depth |
|---|---|---|---|---|---|
| — | — G-9-177097 | — | — | — | — |
| — | — G-9-280290 | — | — | — | — |
Formation tops
As filed on W-2/G-1. Subsea from 2,238 ft elevation.Download CSV →
Perforations
Perforated and open-hole intervals.
| From | To | Type |
|---|---|---|
| 3,710 | 4,639 | Perforated |
| 6,733 | 7,074 | Perforated |
Casing
Strings as reported, shallowest first.
| Casing in | Set at | Hole in | Cement |
|---|---|---|---|
| 8.625 | 2,402 | 11 | 550 S |
| 4.5 | 7,450 | 7.875 | 400 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 | Jul 13, 2016 | Mar 17, 2016 | — |
| 00 | Oct 16, 2000 | May 25, 2000 | Yes |
| 00 | Jun 6, 2000 | — | — |
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 42-435-35053 → W-2, G-1, plugging reports, as PDFs
- Completion packets for 42-435-35053 → 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/43535053, documented in the API reference.