WELL · 42-227-38337 · DISTRICT 8
Darwin #4
Howard County · Jailhouse (Fusselman) field · Vertical
Darwin #4 (API 42-227-38337) is a plugged well in Howard County, plugged December 6, 2023, last operated by Trilogy Operating Inc..
The RRC has issued one drilling permit, issued October 15, 2014, permitted to 12,000 ft.
Completion filings report 10 formation tops, including Yates, Seven Rivers, San Andres, Clear Fork.
Its lease has reported 100 barrels of oil since February 2015, last reporting in January 2024.
Operator of record
Midland, TX · P-5 Y, filed Nov 4, 2025 · 247 permits on file · (432) 556-7931
SOURCE · RRC EWA WELLBORE SCHEDULE
What each RRC source says
| Wellbore schedule | Trilogy Operating Inc. |
| Production reports | Trilogy Operating, Inc.through Oct 2015 |
| Latest permit | Trilogy Operating, Inc.Oct 15, 2014 |
- 12,000
- total depth, ft
- 1
- permits on file
- Oct 15, 2014
- last permit issued
- Feb 22, 2015
- completed
- 100
- cumulative oil, bbl
- 0
- cumulative gas, mcf
PRODUCTION FROM PDQ LEASE REPORTS · Feb 2015 THROUGH Jan 2024
Regulatory status · RRC wellbore file
- Schedule
- OFF SCHEDULE
- Completed
- Feb 22, 2015
- Shut in
- —
- Plugged
- Dec 6, 2023
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 |
|---|---|---|---|---|---|---|
| Darwin O-10-46084 | Jailhouse (Fusselman) | Trilogy Operating, Inc. | 1 | 100 | 0 | Feb 2015 – Jan 2024 |
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.
- 1Trilogy Operating, Inc.Mar 2015 → Oct 2015
Permits
| Permit | Type | Operator | Received | Issued | Spud | Depth |
|---|---|---|---|---|---|---|
| 798348-99 | Drill | Trilogy Operating, Inc. | Oct 14, 2014 | Oct 15, 2014 | Nov 18, 2014 | 12,000 |
Completions
| Completed | Lease | Field | Operator | Status | Depth |
|---|---|---|---|---|---|
| — | — O-10-46084 | — | — | — | — |
Formation tops
As filed on W-2/G-1. Subsea from 2,795 ft elevation.Download CSV →
| Formation | MD ft | Subsea |
|---|---|---|
| Yates | 1,721 | 1,074 |
| Seven Rivers | 2,136 | 659 |
| San AndresSAN ANDRES - HIGH FLOWS, H2S, CO | 2,760 | 35 |
| Clear ForkCLEARFORK - SEVERE WATER FLOWS | 3,660 | -865 |
| Wolfcamp | 5,810 | -3,015 |
| Coleman Junction | — | — |
| Dean | — | — |
| Glorieta | — | — |
| Leonard | — | — |
| Spraberry | — | — |
Perforations
Perforated and open-hole intervals.
| From | To | Type |
|---|---|---|
| 9,973 | 9,978 | Perforated |
Casing
Strings as reported, shallowest first.
| Casing in | Set at | Hole in | Cement |
|---|---|---|---|
| 13.375 | 398 | 17.5 | 420 S |
| 8.625 | 4,290 | 11 | 700 S |
| 5.5 | 10,188 | 7.875 | 770 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 | May 7, 2015 | Apr 1, 2015 | Yes |
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 42-227-38337 → W-2, G-1, plugging reports, as PDFs
- Completion packets for 42-227-38337 → 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/22738337, documented in the API reference.