WELL · 42-389-31496 · DISTRICT 8
Tunstill Oil & Land Co. #1
Reeves County · Matthews (Canyon Cons.) field · Vertical
Tunstill Oil & Land CO. #1 (API 42-389-31496) is a plugged well in Reeves County, plugged March 26, 2020, last operated by Mayjac I LLC.
The RRC has issued one drilling permit, issued March 20, 1984, permitted to 5,100 ft.
It was permitted by Conoco Inc. and has since transferred to Mayjac I LLC on the wellbore schedule.
Completion filings report 3 formation tops, including Ramsey, Olds, Cherry Canyon.
Its 2 leases have reported 40.1K barrels of oil and 43.5K mcf of gas since January 1993, last reporting in July 2026. The leases carry 6 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.Mar 20, 1984 |
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
- Mar 20, 1984
- last permit issued
- May 18, 1984
- completed
- 40.1K
- cumulative oil, bbl
- 43.5K
- cumulative gas, mcf
PRODUCTION FROM PDQ LEASE REPORTS · Jan 1993 THROUGH Jul 2026
Regulatory status · RRC wellbore file
- Schedule
- OFF SCHEDULE
- Completed
- May 18, 1984
- Shut in
- —
- Plugged
- Mar 26, 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 6 wells in total, so volumes are shared.Why →
| Lease | Field | Reporting operator | Wells | Oil, bbl | Gas, mcf | Reported |
|---|---|---|---|---|---|---|
| Tunstill Oil & Land Co. O-10-38660 | Matthews (Canyon Cons.) | Mayjac I, LLC | 3 | 6.76K | 0 | Oct 2007 – Jul 2026 |
| Tunstill Oil & Land Co. O-10-28952 | Matthews (Lower Cherry Canyon) | Mayjac I, LLC | 3 | 33.4K | 43.5K | 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 |
|---|---|---|---|---|---|---|
| 232966-99 | Drill | Conoco Inc. | Mar 19, 1984 | Mar 20, 1984 | Apr 22, 1984 | 5,100 |
Completions
| Completed | Lease | Field | Operator | Status | Depth |
|---|---|---|---|---|---|
| — | — O-10-28952 | — | — | — | — |
| — | — O-10-38660 | — | — | — | — |
Formation tops
As filed on W-2/G-1. Subsea from 2,775 ft elevation.Download CSV →
| Formation | MD ft | Subsea |
|---|---|---|
| Ramsey | 2,980 | -205 |
| Olds | 3,005 | -230 |
| Cherry Canyon | 3,906 | -1,131 |
| Cherry CanyonLOWER CHERRY CANYON | 4,359 | -1,584 |
Perforations
Perforated and open-hole intervals.
| From | To | Type |
|---|---|---|
| 4,375 | 4,392 | Perforated |
| 4,424 | 4,444 | Perforated |
Casing
Strings as reported, shallowest first.
| Casing in | Set at | Hole in | Cement |
|---|---|---|---|
| 9.625 | 800 | 12.25 | 750 S |
| 5.5 | 5,000 | 8.5 | 660 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 | May 31, 1984 | — |
| 00 | Jun 7, 1984 | May 31, 1984 | — |
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 42-389-31496 → W-2, G-1, plugging reports, as PDFs
- Completion packets for 42-389-31496 → 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/38931496, documented in the API reference.