TEXAS · WELLS · RUSK COUNTY · WILLIAMSON UNIT LEASE · API 42-401-33124 · DISTRICT 06
Williamson Unit #4
Rusk County · Oak Hill (Cotton Valley) field · Vertical
Williamson Unit #4 (API 42-401-33124) is a plugged well in Rusk County, plugged February 22, 2022, last operated by Highmark Energy Operating LLC.
The RRC has issued one drilling permit, issued June 6, 2001, permitted to 11,000 ft.
It was permitted by Energen Resources Corporation and has since transferred to Highmark Energy Operating LLC on the wellbore schedule.
Completion filings report 6 formation tops, including Tma, Rodessa, Pettit, Travis Peak.
Its lease has reported 2.74K barrels of oil and 426K mcf of gas since November 2001, with no volume in the three years through April 2026.
Operator of record
Permitted by Energen Resources Corporation; the EWA schedule now lists a different operator.
- Based in
- Houston, TX
- P-5 status
- Active (A)
- P-5 last filed
- Mar 9, 2026
- Permits on file
- 23
- Phone
- (469) 214-5299
SOURCE · RRC EWA WELLBORE SCHEDULE
What each RRC source says
| Wellbore schedule | Highmark Energy Operating LLC |
| Production reports | Highmark Energy Operating, LLCthrough Dec 2016 |
| Latest permit | Energen Resources CorporationJun 6, 2001 |
The sources disagree, which usually means a transfer or a lease-level production filing by a different entity. Petrora goes with the schedule.
- 11,000
- total depth, ft
- 1
- permits on file
- Jun 6, 2001
- last permit issued
- Nov 5, 2001
- completed
- 2.74K
- cumulative oil, bbl
- 426K
- cumulative gas, mcf
PRODUCTION FROM PDQ LEASE REPORTS · Nov 2001 THROUGH Dec 2016
Regulatory status · RRC wellbore file
- Schedule
- OFF SCHEDULE
- Completed
- Nov 5, 2001
- Shut in
- —
- Plugged
- Feb 22, 2022
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 |
|---|---|---|---|---|---|---|
| Williamson Unit G-6-186515 | Oak Hill (Cotton Valley) | Highmark Energy Operating, LLC | 1 | 2.74K | 426K | Nov 2001 – Dec 2016 |
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.
- 1Energen Resources CorporationNov 2001 → May 2014
- 2Highmark Energy Operating, LLCJun 2014 → Dec 2016
Permits
| Permit | Type | Operator | Received | Issued | Spud | Depth |
|---|---|---|---|---|---|---|
| 509921-99 | Drill | Energen Resources Corporation | Jun 6, 2001 | Jun 6, 2001 | Jul 31, 2001 | 11,000 |
Completions
| Completed | Lease | Field | Operator | Status | Depth |
|---|---|---|---|---|---|
| Nov 5, 2001 | Williamson Unit G-6-186515 | Oak Hill (Cotton Valley) | Highmark Energy Operating LLC | Plugged | — |
Formation tops
As filed on W-2/G-1. Subsea from 378 ft elevation.Download CSV →
| Formation | MD ft | Subsea |
|---|---|---|
| Tma | 5,750 | -5,372 |
| Rodessa | 6,070 | -5,692 |
| Pettit | 6,740 | -6,362 |
| Travis PeakTOP OF TRAVIS PEAK | 7,040 | -6,662 |
| Cotton ValleyUPPER COTTON VALLEY | 9,060 | -8,682 |
| Top C.V. Taylor | 10,140 | -9,762 |
Perforations
Perforated and open-hole intervals.
| From | To | Type |
|---|---|---|
| 10,204 | 10,480 | Perforated |
Casing
Strings as reported, shallowest first.
| Casing in | Set at | Hole in | Cement |
|---|---|---|---|
| 9.625 | 1,065 | 12.25 | 350 S |
| 4.5 | 10,580 | 7.875 | 1,240 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. The record date is the RRC's own date on the record, not the day the report was filed: 462,034 of the state's filings carry 1984-01-12. About these reports →
| Suffix | RRC record date | W-2 / G-1 date | Logs referenced |
|---|---|---|---|
| 00 | Feb 11, 2002 | Dec 3, 2001 | Yes |
| 00 | Jan 28, 2002 | — | — |
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 42-401-33124 → W-2, G-1, plugging reports, as PDFs
- Completion packets for 42-401-33124 → scanned completion filings
Log images filed since 2004 open from the RRC's log search for this well; none are loaded here for it.
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/40133124, documented in the API reference.