WELL · 42-079-31821 · DISTRICT 8
Masten F. O. Estate #1
Cochran County · Buckshot (Fusselman) field · Vertical
Masten F. O. Estate #1 (API 42-079-31821) is a plugged well in Cochran County, plugged October 23, 2020, last operated by Southwest Royalties Inc..
The RRC has issued one drilling permit, issued September 23, 1983, permitted to 12,000 ft.
It was permitted by Klabzuba, Robert and has since transferred to Southwest Royalties Inc. on the wellbore schedule.
Completion filings report 4 formation tops, including T/Miss, T/Kinderhook, T/Wd, T/Fusselman.
Its lease has reported 249K barrels of oil and 54 mcf of gas since January 1993, last reporting in April 2021.
Operator of record
Permitted by Klabzuba, Robert; the EWA schedule now lists a different operator.
Midland, TX · P-5 Y, filed Oct 4, 2025 · 497 permits on file · (432) 770-0615
SOURCE · RRC EWA WELLBORE SCHEDULE
What each RRC source says
| Wellbore schedule | Southwest Royalties Inc. |
| Production reports | Southwest Royalties, Inc.through Feb 2019 |
| Latest permit | Klabzuba, RobertSep 23, 1983 |
The sources disagree, which usually means a transfer or a lease-level production filing by a different entity. Petrora goes with the schedule.
- 12,000
- total depth, ft
- 1
- permits on file
- Sep 23, 1983
- last permit issued
- Jan 26, 1984
- completed
- 249K
- cumulative oil, bbl
- 54
- cumulative gas, mcf
PRODUCTION FROM PDQ LEASE REPORTS · Jan 1993 THROUGH Apr 2021
Regulatory status · RRC wellbore file
- Schedule
- OFF SCHEDULE
- Completed
- Jan 26, 1984
- Shut in
- —
- Plugged
- Oct 23, 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 lease this well is completed on; this well is the only one on it.Why →
| Lease | Field | Reporting operator | Wells | Oil, bbl | Gas, mcf | Reported |
|---|---|---|---|---|---|---|
| Masten, F. O. Estate O-11-64683 | Buckshot (Fusselman) | Southwest Royalties, Inc. | 1 | 249K | 54 | Jan 1993 – Apr 2021 |
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.
- 1Klabzuba Operating CompanyJan 1993 → Jun 1997
- 2Southwest Royalties, Inc.Jul 1997 → Feb 2019
Permits
| Permit | Type | Operator | Received | Issued | Spud | Depth |
|---|---|---|---|---|---|---|
| 214213-99 | Drill | Klabzuba, Robert | Sep 19, 1983 | Sep 23, 1983 | — | 12,000 |
Completions
| Completed | Lease | Field | Operator | Status | Depth |
|---|---|---|---|---|---|
| — | — O-11-64683 | — | — | — | — |
Formation tops
As filed on W-2/G-1. Subsea from 3,873 ft elevation.Download CSV →
| Formation | MD ft | Subsea |
|---|---|---|
| T/Miss | 10,940 | -7,067 |
| T/Kinderhook | 11,298 | -7,425 |
| T/WD | 11,314 | -7,441 |
| T/Fusselman | 11,342 | -7,469 |
Perforations
Perforated and open-hole intervals.
| From | To | Type |
|---|---|---|
| 11,342 | 11,355 | Perforated |
Casing
Strings as reported, shallowest first.
| Casing in | Set at | Hole in | Cement |
|---|---|---|---|
| 13.375 | 452 | 17.5 | 475 S |
| 8.625 | 5,226 | 12.25 | 500 S |
| 5.5 | 11,344 | 7.875 | 240 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 | Mar 20, 1984 | Feb 10, 1984 | — |
| 00 | Feb 22, 1984 | Feb 10, 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 42-079-31821 → W-2, G-1, plugging reports, as PDFs
- Completion packets for 42-079-31821 → 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/07931821, documented in the API reference.