WELL · 42-495-10005 · DISTRICT 8
Zachary Estate #1
Winkler County · Vertical
Zachary Estate #1 (API 42-495-10005) is a permitted well in Winkler County filed by Mas Operating CO.; no completion report is on file yet.
The RRC has issued 2 drilling permits between 1996 and 2015, permitted to 5,280 ft.
Completion filings report 10 formation tops, including Rustler, Yates, Colby-Queen, Grayburg.
Its 3 leases have reported 130K barrels of oil and 906K mcf of gas since January 1993, last reporting in July 2026. The leases carry 5 wells, so these are lease totals, not this well alone.
Operator of record
Midland, TX · P-5 Y, filed Mar 4, 2026 · 6 permits on file · (432) 349-3846
SOURCE · RRC EWA WELLBORE SCHEDULE
What each RRC source says
| Wellbore schedule | none |
| Production reports | Mas Operating Co.through Apr 2026 |
| Latest permit | Mas Operating Co.Mar 27, 2015 |
- 5,280
- total depth, ft
- 2
- permits on file
- Mar 27, 2015
- last permit issued
- —
- completed
- 130K
- cumulative oil, bbl
- 906K
- cumulative gas, mcf
PRODUCTION FROM PDQ LEASE REPORTS · Jan 1993 THROUGH Jul 2026
Regulatory status · RRC wellbore file
- Schedule
- OFF SCHEDULE
- Completed
- —
- 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 3 leases this well is completed on; they carry 5 wells in total, so volumes are shared.Why →
| Lease | Field | Reporting operator | Wells | Oil, bbl | Gas, mcf | Reported |
|---|---|---|---|---|---|---|
| Zachary Estate O-10-48041 | Keystone (Consolidated) | Mas Operating Co. | 2 | 47.3K | 275K | Sep 2015 – Jul 2026 |
| Zachary Estate O-10-34887 | Keystone (Holt) | Mas Operating Co. | 2 | 83K | 616K | Mar 1996 – Mar 2017 |
| Zachary Estate G-10-33377 | Kermit, South (Devonian-Oil) | Dudley Oil Co. | 1 | 0 | 14.6K | Jan 1993 – Mar 1996 |
Oil, barrels lease total
Last 12 months 2,598 · prior 12 3,303(-21%)
Gas, mcf lease total
Last 12 months 431 · prior 12 3,386(-87%)
Chain of custody
Every operator that reported production on this well's lease, in order.
- 1Devon Energy Corporation(nevada)Jan 1993 → Feb 1994
- 2Dudley Oil Co.Mar 1996 → Dec 1998
- 3Dan Mar Well ServiceJan 1999 → Jul 2004
- 4Mas Operating Co.Aug 2004 → Apr 2026
Permits
| Permit | Type | Operator | Received | Issued | Spud | Depth |
|---|---|---|---|---|---|---|
| 804779-99 | Recompletion | Mas Operating Co. | Mar 18, 2015 | Mar 27, 2015 | — | 5,075 |
| 446329-99 | Recompletion | Dudley Oil Co. | Mar 26, 1996 | Mar 27, 1996 | Mar 24, 1996 | 5,280 |
Completions
| Completed | Lease | Field | Operator | Status | Depth |
|---|---|---|---|---|---|
| — | — G-10-33377 | — | — | — | — |
| — | — O-10-34887 | — | — | — | — |
| — | — O-10-48041 | — | — | — | — |
Formation tops
As filed on W-2/G-1. Subsea from 2,883 ft elevation.Download CSV →
| Formation | MD ft | Subsea |
|---|---|---|
| RustlerRUSTLER - POSSIBLE FLOW; POSSIBL | 725 | 2,158 |
| Yates | 2,500 | 383 |
| Colby-Queen | 3,200 | -317 |
| Grayburg | 3,350 | -467 |
| QueenQUEEN-SEVEN RIVERS | 3,400 | -517 |
| San Andres | 3,700 | -817 |
| San AndresSAN ANDRES - HIGH FLOWS, H2S, CO | 3,700 | -817 |
| San AndresLOWER SAN ANDRES | 4,292 | -1,409 |
| Glorieta | 4,772 | -1,889 |
| Holt | 4,800 | -1,917 |
| Holt | 5,105 | -2,222 |
| Clear ForkCLEARFORK | 5,150 | -2,267 |
| Holt | 5,150 | -2,267 |
| Delaware | — | — |
Perforations
Perforated and open-hole intervals.
| From | To | Type |
|---|---|---|
| 4,756 | 4,770 | Perforated |
| 5,150 | 5,280 | Perforated |
Casing
Strings as reported, shallowest first.
| Casing in | Set at | Hole in | Cement |
|---|---|---|---|
| 11.75 | 398 | — | — |
| 11.75 | 416 | 13.5 | 350 S |
| 8.625 | 3,584 | — | — |
| 8.625 | 3,600 | 10.75 | 1,340 S |
| 2.375 | 8,065 | — | — |
| 4.5 | 8,280 | — | — |
| 4.5 | 8,294 | 6.25 | 1,100 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 | Apr 12, 2017 | Oct 7, 2015 | — |
| 00 | Dec 8, 2016 | Apr 23, 2014 | — |
| 00 | Nov 24, 2014 | Apr 23, 2014 | — |
| 00 | May 9, 1996 | Apr 1, 1996 | Yes |
| 00 | Apr 25, 1996 | — | — |
| 00 | Jan 12, 1984 | Jun 24, 1964 | — |
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 42-495-10005 → W-2, G-1, plugging reports, as PDFs
- Completion packets for 42-495-10005 → 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/49510005, documented in the API reference.