WELL · 42-033-31072 · DISTRICT 8
West JO-Mill Unit #305WS
Borden County · JO-Mill (Spraberry) field · Vertical
West JO-Mill Unit #305WS (API 42-033-31072) is a plugged well in Borden County, plugged December 18, 1993, last operated by JO Mill Oil Company LLC.
The RRC has issued 2 drilling permits between 1984 and 1999, permitted to 7,600 ft.
It was permitted by Phillips Petroleum Company and has since transferred to JO Mill Oil Company LLC on the wellbore schedule.
Completion filings report 6 formation tops, including Santa Rosa, Rustler, Yates, San Andres.
Its lease has reported 7.68M barrels of oil and 2.74M mcf of gas since January 1993, last reporting in July 2026. The lease carries 103 wells, so these are lease totals, not this well alone.
Operator of record
Permitted by Phillips Petroleum Company; the EWA schedule now lists a different operator.
Fort Worth, TX · P-5 Y, filed May 4, 2026 · (682) 715-5794
SOURCE · RRC EWA WELLBORE SCHEDULE
What each RRC source says
| Wellbore schedule | JO Mill Oil Company LLC |
| Production reports | JO Mill Oil Company LLCthrough Apr 2026 |
| Latest permit | Phillips Petroleum CompanyMay 28, 1999 |
The sources disagree, which usually means a transfer or a lease-level production filing by a different entity. Petrora goes with the schedule.
- 7,600
- total depth, ft
- 2
- permits on file
- May 28, 1999
- last permit issued
- Jun 21, 1988
- completed
- 7.68M
- cumulative oil, bbl
- 2.74M
- cumulative gas, mcf
PRODUCTION FROM PDQ LEASE REPORTS · Jan 1993 THROUGH Jul 2026
Regulatory status · RRC wellbore file
- Schedule
- OFF SCHEDULE
- Completed
- Jun 21, 1988
- Shut in
- —
- Plugged
- Dec 18, 1993
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; they carry 103 wells in total, so volumes are shared.Why →
| Lease | Field | Reporting operator | Wells | Oil, bbl | Gas, mcf | Reported |
|---|---|---|---|---|---|---|
| West JO-Mill Unit O-11-61062 | JO-Mill (Spraberry) | JO Mill Oil Company LLC | 103 | 7.68M | 2.74M | Jan 1993 – Jul 2026 |
Oil, barrels lease total
Last 12 months 87,073 · prior 12 110,705(-21%)
Chain of custody
Every operator that reported production on this well's lease, in order.
- 1Phillips Petroleum CompanyJan 1993 → Dec 2002
- 2Conocophillips CompanyJan 2003 → Jun 2018
- 3Great Western Drilling CompanyJul 2018 → Oct 2024
- 4Basin Oil & Gas Operating, LLCNov 2024 → Mar 2025
- 5JO Mill Oil Company LLCApr 2025 → Apr 2026
Permits
| Permit | Type | Operator | Received | Issued | Spud | Depth |
|---|---|---|---|---|---|---|
| 484798-99 | Reenter | Phillips Petroleum Company | May 26, 1999 | May 28, 1999 | Jun 8, 1999 | 1,900 |
| 249994-99 | Drill | Phillips Petroleum Company | Aug 29, 1984 | Aug 30, 1984 | Oct 2, 1984 | 7,600 |
Completions
| Completed | Lease | Field | Operator | Status | Depth |
|---|---|---|---|---|---|
| — | — O-11-61062 | — | — | — | — |
| — | — O-11-61062 | — | — | — | — |
Formation tops
As filed on W-2/G-1. Subsea from 2,724 ft elevation.Download CSV →
| Formation | MD ft | Subsea |
|---|---|---|
| Santa Rosa | 770 | 1,954 |
| Rustler | 1,452 | 1,272 |
| Yates | 1,964 | 760 |
| San Andres | 3,236 | -512 |
| Clear Fork | 4,960 | -2,236 |
| SpraberryUPPER SPRABERRY | 6,428 | -3,704 |
| SpraberryLOWER SPRABERRY | 6,950 | -4,226 |
Perforations
Perforated and open-hole intervals.
| From | To | Type |
|---|---|---|
| 890 | 1,110 | Perforated |
| 7,413 | 7,436 | Perforated |
Casing
Strings as reported, shallowest first.
| Casing in | Set at | Hole in | Cement |
|---|---|---|---|
| 13.375 | 500 | 17.2 | 500 S |
| 13.375 | 500 | 17.5 | 500 S |
| 8.625 | 4,600 | 11 | 1,700 S |
| 5.5 | 7,500 | 7.875 | 450 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 | Oct 8, 1999 | Aug 20, 1999 | Yes |
| 00 | Sep 7, 1999 | — | — |
| 00 | Aug 25, 1988 | Aug 9, 1988 | — |
| 00 | Dec 21, 1984 | Dec 10, 1984 | — |
| 00 | Dec 20, 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 42-033-31072 → W-2, G-1, plugging reports, as PDFs
- Completion packets for 42-033-31072 → 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/03331072, documented in the API reference.