WELL · 42-389-31703 · DISTRICT 8
Tunstill O & L -A- #1
Reeves County · Matthews (Canyon Cons.) field · Vertical
Tunstill O & L -A- #1 (API 42-389-31703) is a plugged well in Reeves County, plugged March 24, 2020, last operated by Mayjac I LLC.
The RRC has issued one drilling permit, issued December 9, 1985, permitted to 4,550 ft.
It was permitted by Conoco Inc. and has since transferred to Mayjac I LLC on the wellbore schedule.
Completion filings report one formation top, including Cherry Canyon.
Its 2 leases have reported 41.2K barrels of oil and 35.9K mcf of gas since January 1993, last reporting in July 2026. The leases carry 2 wells, so these are lease totals, not this well alone.
Operator of record
Permitted by Conoco Inc.; the EWA schedule now lists a different operator.
Midland, TX · P-5 Y, filed Jul 4, 2026 · (432) 553-2149
SOURCE · RRC EWA WELLBORE SCHEDULE
What each RRC source says
| Wellbore schedule | Mayjac I LLC |
| Production reports | Mayjac I, LLCthrough Apr 2020 |
| Latest permit | Conoco Inc.Dec 9, 1985 |
The sources disagree, which usually means a transfer or a lease-level production filing by a different entity. Petrora goes with the schedule.
- 4,550
- total depth, ft
- 1
- permits on file
- Dec 9, 1985
- last permit issued
- Feb 20, 1986
- completed
- 41.2K
- cumulative oil, bbl
- 35.9K
- cumulative gas, mcf
PRODUCTION FROM PDQ LEASE REPORTS · Jan 1993 THROUGH Jul 2026
Regulatory status · RRC wellbore file
- Schedule
- OFF SCHEDULE
- Completed
- Feb 20, 1986
- Shut in
- —
- Plugged
- Mar 24, 2020
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 |
|---|---|---|---|---|---|---|
| Tunstill O & L -A- O-10-38661 | Matthews (Canyon Cons.) | Mayjac I, LLC | 1 | 6.76K | 0 | Oct 2007 – Jul 2026 |
| Tunstil O & L -A O-10-30581 | Matthews (Lower Cherry Canyon) | Mayjac I, LLC | 1 | 34.4K | 35.9K | Jan 1993 – Aug 2008 |
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.
- 1Conoco Inc.Jan 1993 → Mar 1993
- 2Huff, JackApr 1993 → Dec 2004
- 3Mayjac I, LLCJan 2005 → Apr 2020
Permits
| Permit | Type | Operator | Received | Issued | Spud | Depth |
|---|---|---|---|---|---|---|
| 292148-99 | Drill | Conoco Inc. | Nov 19, 1985 | Dec 9, 1985 | Feb 3, 1986 | 4,550 |
Completions
| Completed | Lease | Field | Operator | Status | Depth |
|---|---|---|---|---|---|
| — | — O-10-30581 | — | — | — | — |
| — | — O-10-38661 | — | — | — | — |
Perforations
Perforated and open-hole intervals.
| From | To | Type |
|---|---|---|
| 4,456 | 4,474 | Perforated |
Casing
Strings as reported, shallowest first.
| Casing in | Set at | Hole in | Cement |
|---|---|---|---|
| 8.625 | 823 | 12.25 | 700 S |
| 5.5 | 4,550 | 7.875 | 1,572 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 | Jun 27, 2008 | Mar 12, 1986 | Yes |
| 00 | Apr 1, 1986 | Mar 12, 1986 | Yes |
| 00 | Mar 21, 1986 | — | — |
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 42-389-31703 → W-2, G-1, plugging reports, as PDFs
- Completion packets for 42-389-31703 → scanned completion filings
Log images are in archives with no per-well link: the RRC's Neubus archive (2004 onward) and the University Lands library. 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/38931703, documented in the API reference.