WELL · 42-021-31200 · DISTRICT 3
Milrose-Cook #1
Bastrop County · Serbin (Taylor Sand) field · Producing · Vertical
Milrose-Cook #1 (API 42-021-31200) is a well in Bastrop County operated by Trivista Operating LLC, completed July 5, 1988 and listed as producing on the RRC schedule.
The RRC has issued one drilling permit, issued April 26, 1988, permitted to 5,800 ft.
It was permitted by Amberton Exploration Company and has since transferred to Trivista Operating LLC on the wellbore schedule.
Completion filings report 3 formation tops, including Wilcox, Navarro, Taylor.
Its lease has reported 15.7K barrels of oil and 24.2K mcf of gas since January 1993, last reporting in July 2026.
Operator of record
Permitted by Amberton Exploration Company; the EWA schedule now lists a different operator.
Giddings, TX · P-5 Y, filed Jul 4, 2026 · 3 permits on file · (979) 540-7335
SOURCE · RRC EWA WELLBORE SCHEDULE
What each RRC source says
| Wellbore schedule | Trivista Operating LLC |
| Production reports | Trivista Operating LLCthrough Feb 2026 |
| Latest permit | Amberton Exploration CompanyApr 26, 1988 |
The sources disagree, which usually means a transfer or a lease-level production filing by a different entity. Petrora goes with the schedule.
- 5,800
- total depth, ft
- 1
- permits on file
- Apr 26, 1988
- last permit issued
- Jul 5, 1988
- completed
- 15.7K
- cumulative oil, bbl
- 24.2K
- cumulative gas, mcf
PRODUCTION FROM PDQ LEASE REPORTS · Jan 1993 THROUGH Jul 2026
Regulatory status · RRC wellbore file
- Schedule
- ON SCHEDULE
- Completed
- Jul 5, 1988
- Shut in
- —
- Plugged
- —
Operator's P-5 on the schedule: H
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 |
|---|---|---|---|---|---|---|
| Milrose-Cook O-3-20222 | Serbin (Taylor Sand) | Trivista Operating LLC | 1 | 15.7K | 24.2K | Jan 1993 – Jul 2026 |
Oil, barrels lease total
Last 12 months 407 · prior 12 389(+5%)
Chain of custody
Every operator that reported production on this well's lease, in order.
- 1Gulfstar Properties, Inc.Jan 1993 → Jan 1993
- 2Infield Development CorporationFeb 1993 → Aug 1993
- 3LE Bas Operating Company, Inc.Sep 1993 → Feb 1998
- 4Texas Vanguard Oil CompanyMar 1998 → Sep 2013
- 5Trivista Operating LLCOct 2013 → Feb 2026
Permits
| Permit | Type | Operator | Received | Issued | Spud | Depth |
|---|---|---|---|---|---|---|
| 345729-99 | Drill | Amberton Exploration Company | Apr 26, 1988 | Apr 26, 1988 | — | 5,800 |
Completions
| Completed | Lease | Field | Operator | Status | Depth |
|---|---|---|---|---|---|
| — | — O-3-20222 | — | — | — | — |
Formation tops
As filed on W-2/G-1. Subsea from 402 ft elevation.Download CSV →
Perforations
Perforated and open-hole intervals.
| From | To | Type |
|---|---|---|
| 5,203 | 5,205 | Perforated |
| 5,210 | 5,212 | Perforated |
| 5,230 | 5,232 | Perforated |
| 5,236 | 5,246 | Perforated |
Casing
Strings as reported, shallowest first.
| Casing in | Set at | Hole in | Cement |
|---|---|---|---|
| 8.625 | 597 | 12.25 | 240 S |
| 4.5 | 5,397 | 7.875 | 160 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 21, 1988 | Aug 8, 1988 | Yes |
| 00 | Sep 13, 1988 | — | — |
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 42-021-31200 → W-2, G-1, plugging reports, as PDFs
- Completion packets for 42-021-31200 → 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/02131200, documented in the API reference.