WELL · 42-447-34538 · DISTRICT 7
Bailey Z #4
Throckmorton County · Throckmorton County Regular field · Vertical
Bailey Z #4 (API 42-447-34538) is a plugged well in Throckmorton County, plugged February 6, 1995, last operated by M. & K. Development CO..
The RRC has issued one drilling permit, issued December 30, 1985, permitted to 990 ft.
It was permitted by Sierra Special Oil Company and has since transferred to M. & K. Development CO. on the wellbore schedule.
Completion filings report one formation top, including Gunsight.
Its 2 leases have reported 308 barrels of oil and 50 mcf of gas since January 1993, last reporting in August 2003. The leases carry 10 wells, so these are lease totals, not this well alone.
Operator of record
Permitted by Sierra Special Oil Company; the EWA schedule now lists a different operator.
Lolita, TX · P-5 Y, filed Mar 7, 1997 · 4 permits on file
SOURCE · RRC EWA WELLBORE SCHEDULE
What each RRC source says
| Wellbore schedule | M. & K. Development Co. |
| Production reports | M. & K. Development Co.through Feb 1997 |
| Latest permit | Sierra Special Oil CompanyDec 30, 1985 |
The sources disagree, which usually means a transfer or a lease-level production filing by a different entity. Petrora goes with the schedule.
- 990
- total depth, ft
- 1
- permits on file
- Dec 30, 1985
- last permit issued
- Jan 24, 1986
- completed
- 308
- cumulative oil, bbl
- 50
- cumulative gas, mcf
PRODUCTION FROM PDQ LEASE REPORTS · Jan 1993 THROUGH Aug 2003
Regulatory status · RRC wellbore file
- Schedule
- OFF SCHEDULE
- Completed
- Jan 24, 1986
- Shut in
- —
- Plugged
- Feb 6, 1995
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 2 leases this well is completed on; they carry 10 wells in total, so volumes are shared.Why →
| Lease | Field | Reporting operator | Wells | Oil, bbl | Gas, mcf | Reported |
|---|---|---|---|---|---|---|
| Bailey Z O-8-23310 | Throckmorton County Regular | M. & K. Development Co. | 6 | 308 | 50 | Jan 1993 – Aug 2003 |
| Bailey O-8-25775 | Throckmorton County Regular | Creswell, Gene | 4 | 0 | 0 | Jan 1993 – Aug 2003 |
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.
- 1M. & K. Development Co.Jan 1993 → Sep 1996
Permits
| Permit | Type | Operator | Received | Issued | Spud | Depth |
|---|---|---|---|---|---|---|
| 293755-99 | Drill | Sierra Special Oil Company | Dec 30, 1985 | Dec 30, 1985 | — | 990 |
Completions
| Completed | Lease | Field | Operator | Status | Depth |
|---|---|---|---|---|---|
| — | — O-8-23310 | — | — | — | — |
| — | — O-8-25775 | — | — | — | — |
Formation tops
As filed on W-2/G-1. Subsea from 1,205 ft elevation.Download CSV →
| Formation | MD ft | Subsea |
|---|---|---|
| Gunsight | 357 | 848 |
Perforations
Perforated and open-hole intervals.
| From | To | Type |
|---|---|---|
| 359 | 363 | Perforated |
Casing
Strings as reported, shallowest first.
| Casing in | Set at | Hole in | Cement |
|---|---|---|---|
| 4.5 | 430 | 6.75 | 115 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 4, 1990 | Feb 4, 1986 | Yes |
| 00 | Apr 12, 1990 | — | — |
| 00 | Feb 26, 1986 | Feb 4, 1986 | Yes |
| 00 | Feb 14, 1986 | — | — |
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 42-447-34538 → W-2, G-1, plugging reports, as PDFs
- Completion packets for 42-447-34538 → 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/44734538, documented in the API reference.