WELL · 42-287-31631 · DISTRICT 3
Koudelke Z #1
Lee County · Hooker Creek (Navarro A) field · Vertical
Koudelke Z #1 (API 42-287-31631) is a plugged well in Lee County, plugged September 11, 2019, last operated by Ernest Operating Company.
The RRC has issued one drilling permit, issued May 25, 1984, permitted to 6,000 ft.
It was permitted by Hollub, Lambert Drilling Company and has since transferred to Ernest Operating Company on the wellbore schedule.
Completion filings report 3 formation tops, including Wilcox, Top Poth, Base Poth.
Its 3 leases have reported 1.62K barrels of oil and 38.7K mcf of gas since January 1993, last reporting in April 2020. The leases carry 3 wells, so these are lease totals, not this well alone.
Operator of record
Permitted by Hollub, Lambert Drilling Company; the EWA schedule now lists a different operator.
- Based in
- Rockdale, TX
- P-5 status
- Active – Extension (X)
- P-5 last filed
- Feb 24, 2026
- Permits on file
- 32
- Phone
- (512) 446-3855
SOURCE · RRC EWA WELLBORE SCHEDULE
What each RRC source says
| Wellbore schedule | Ernest Operating Company |
| Production reports | Ernest Operating Companythrough Feb 2017 |
| Latest permit | Hollub, Lambert Drilling CompanyMay 25, 1984 |
The sources disagree, which usually means a transfer or a lease-level production filing by a different entity. Petrora goes with the schedule.
- 6,000
- total depth, ft
- 1
- permits on file
- May 25, 1984
- last permit issued
- Jun 18, 1984
- completed
- 1.62K
- cumulative oil, bbl
- 38.7K
- cumulative gas, mcf
PRODUCTION FROM PDQ LEASE REPORTS · Jan 1993 THROUGH Apr 2020
Regulatory status · RRC wellbore file
- Schedule
- OFF SCHEDULE
- Completed
- Jun 18, 1984
- Shut in
- —
- Plugged
- Sep 11, 2019
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 3 leases this well is completed on; they carry 3 wells in total, so volumes are shared.Why →
| Lease | Field | Reporting operator | Wells | Oil, bbl | Gas, mcf | Reported |
|---|---|---|---|---|---|---|
| Koudelke Z G-3-264188 | Hooker Creek (Navarro A) | Ernest Operating Company | 1 | 0 | 5.26K | Dec 2010 – Apr 2020 |
| Koudelke Z O-3-22144 | Hooker Creek (Navarro A) | Bar-Mac Investments Inc. | 1 | 1.62K | 32.1K | Sep 1993 – Jun 2017 |
| Koudelka, Z. G-3-111258 | Hooker Creek (Navarro A) | Bar-Mac Investments Inc. | 1 | 0 | 1.33K | Jan 1993 – Dec 1993 |
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.
- 1Bar-Mac Investments Inc.Jan 1993 → Oct 2016
- 2Ernest Operating CompanyFeb 2017 → Feb 2017
Permits
| Permit | Type | Operator | Received | Issued | Spud | Depth |
|---|---|---|---|---|---|---|
| 240293-99 | Drill | Hollub, Lambert Drilling Company | May 25, 1984 | May 25, 1984 | — | 6,000 |
Completions
| Completed | Lease | Field | Operator | Status | Depth |
|---|---|---|---|---|---|
| — | — G-3-111258 | — | — | — | — |
| — | — G-3-264188 | — | — | — | — |
| — | — O-3-22144 | — | — | — | — |
Formation tops
As filed on W-2/G-1. Subsea from 381 ft elevation.Download CSV →
| Formation | MD ft | Subsea |
|---|---|---|
| WilcoxBASE WILCOX | 3,810 | -3,429 |
| Top Poth | 3,880 | -3,499 |
| Base Poth | 4,021 | -3,640 |
Perforations
Perforated and open-hole intervals.
| From | To | Type |
|---|---|---|
| 4,590 | 4,611 | Perforated |
Casing
Strings as reported, shallowest first.
| Casing in | Set at | Hole in | Cement |
|---|---|---|---|
| 8.625 | 160 | 12.25 | 110 sx |
| 4.5 | 4,710 | 7.875 | 785 sx |
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 | Aug 7, 2012 | Feb 7, 2011 | — |
| 00 | Oct 28, 1993 | Sep 23, 1993 | — |
| 00 | Sep 28, 1993 | — | — |
| 00 | Jul 16, 1984 | Apr 5, 1984 | — |
| 00 | Jul 12, 1984 | Apr 5, 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 42-287-31631 → W-2, G-1, plugging reports, as PDFs
- Completion packets for 42-287-31631 → 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/28731631, documented in the API reference.