WELL · 42-041-31765 · DISTRICT 3
Zwiefel Unit #1
Brazos County · Kurten (Buda) field · Horizontal
Zwiefel Unit #1 (API 42-041-31765) is a plugged horizontal well in Brazos County, plugged August 5, 2014, last operated by Williams Clayton Energy Inc..
The RRC has issued one drilling permit, issued August 10, 1993, permitted to 8,500 ft.
Completion filings report 4 formation tops, including Pecan Gap, Austin Chalk, Eagle Ford, Buda.
Its lease has reported 122K barrels of oil and 58.8K mcf of gas since September 1993, last reporting in February 2015.
Operator of record
- Based in
- Houston, TX
- P-5 status
- Delinquent (D)
- P-5 last filed
- Apr 11, 2017
- Permits on file
- 1,139
- Phone
- (281) 872-3100
SOURCE · RRC EWA WELLBORE SCHEDULE
What each RRC source says
| Wellbore schedule | Williams Clayton Energy Inc. |
| Production reports | Williams, Clayton Energy, Inc.through May 2012 |
| Latest permit | Williams, Clayton Energy, Inc.Aug 10, 1993 |
- 8,500
- total depth, ft
- 1
- permits on file
- Aug 10, 1993
- last permit issued
- Sep 20, 1993
- completed
- 122K
- cumulative oil, bbl
- 58.8K
- cumulative gas, mcf
PRODUCTION FROM PDQ LEASE REPORTS · Sep 1993 THROUGH Feb 2015
Regulatory status · RRC wellbore file
- Schedule
- OFF SCHEDULE
- Completed
- Sep 20, 1993
- Shut in
- —
- Plugged
- Aug 5, 2014
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 |
|---|---|---|---|---|---|---|
| Zwiefel Unit O-3-22172 | Kurten (Buda) | Williams, Clayton Energy, Inc. | 1 | 122K | 58.8K | Sep 1993 – Feb 2015 |
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.
- 1Williams, Clayton Energy, Inc.Sep 1993 → May 2012
Permits
| Permit | Type | Operator | Received | Issued | Spud | Depth |
|---|---|---|---|---|---|---|
| 414802-99 | Drill | Williams, Clayton Energy, Inc. | Aug 10, 1993 | Aug 10, 1993 | Aug 12, 1993 | 8,500 |
Completions
| Completed | Lease | Field | Operator | Status | Depth |
|---|---|---|---|---|---|
| — | — O-3-22172 | — | — | — | — |
Formation tops
As filed on W-2/G-1. Subsea from 405 ft elevation.Download CSV →
| Formation | MD ft | Subsea |
|---|---|---|
| Pecan Gap | 5,985 | -5,580 |
| Austin Chalk | 7,173 | -6,768 |
| Eagle FordEAGLEFORD | 7,490 | -7,085 |
| Buda | 8,190 | -7,785 |
Perforations
Perforated and open-hole intervals.
| From | To | Type |
|---|---|---|
| 8,146 | 11,983 | Perforated |
Casing
Strings as reported, shallowest first.
| Casing in | Set at | Hole in | Cement |
|---|---|---|---|
| 9.625 | 1,009 | 12.25 | 380 S |
| 7 | 8,146 | 8.75 | 480 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 | Nov 1, 1993 | Oct 13, 1993 | Yes |
| 00 | Oct 26, 1993 | — | — |
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 42-041-31765 → W-2, G-1, plugging reports, as PDFs
- Completion packets for 42-041-31765 → 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/04131765, documented in the API reference.