WELL · 42-187-32821 · DISTRICT 1
Tadlock A. U. -A- #4
Guadalupe County · Darst Creek (Buda) field · Vertical
Tadlock A. U. -A- #4 (API 42-187-32821) is a plugged well in Guadalupe County, plugged September 15, 2008, last operated by DJ Exploration Inc..
The RRC has issued one drilling permit, issued August 2, 1984, permitted to 2,600 ft.
It was permitted by Lockhart Oil & Gas and has since transferred to DJ Exploration Inc. on the wellbore schedule.
Completion filings report 4 formation tops, including Taylor, Austin Chalk, Eagle Ford, Buda.
Its lease has reported 20.6K barrels of oil and 17.1K mcf of gas since January 1993, last reporting in July 2026. The lease carries 4 wells, so these are lease totals, not this well alone.
Operator of record
Permitted by Lockhart Oil & Gas; the EWA schedule now lists a different operator.
San Antonio, TX · P-5 Y, filed Nov 4, 2025 · 23 permits on file · (210) 861-4200
SOURCE · RRC EWA WELLBORE SCHEDULE
What each RRC source says
| Wellbore schedule | DJ Exploration Inc. |
| Production reports | DJ Exploration, Inc.through Apr 2026 |
| Latest permit | Lockhart Oil & GasAug 2, 1984 |
The sources disagree, which usually means a transfer or a lease-level production filing by a different entity. Petrora goes with the schedule.
- 2,600
- total depth, ft
- 1
- permits on file
- Aug 2, 1984
- last permit issued
- Jul 17, 1985
- completed
- 20.6K
- cumulative oil, bbl
- 17.1K
- cumulative gas, mcf
PRODUCTION FROM PDQ LEASE REPORTS · Jan 1993 THROUGH Jul 2026
Regulatory status · RRC wellbore file
- Schedule
- OFF SCHEDULE
- Completed
- Jul 17, 1985
- Shut in
- —
- Plugged
- Sep 15, 2008
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; they carry 4 wells in total, so volumes are shared.Why →
| Lease | Field | Reporting operator | Wells | Oil, bbl | Gas, mcf | Reported |
|---|---|---|---|---|---|---|
| Tadlock, A. U. -A- O-1-2823 | Darst Creek (Buda) | DJ Exploration, Inc. | 4 | 20.6K | 17.1K | Jan 1993 – Jul 2026 |
Oil, barrels lease total
Last 12 months 466 · prior 12 482(-3%)
Chain of custody
Every operator that reported production on this well's lease, in order.
- 1Darst Creek Oil CompanyJan 1993 → May 2000
- 2Garrison Ltd.Jun 2000 → May 2025
- 3DJ Exploration, Inc.Jun 2025 → Apr 2026
Permits
| Permit | Type | Operator | Received | Issued | Spud | Depth |
|---|---|---|---|---|---|---|
| 247094-99 | Drill | Lockhart Oil & Gas | Jul 31, 1984 | Aug 2, 1984 | — | 2,600 |
Completions
| Completed | Lease | Field | Operator | Status | Depth |
|---|---|---|---|---|---|
| — | — O-1-2823 | — | — | — | — |
Formation tops
As filed on W-2/G-1. Download CSV →
| Formation | MD ft |
|---|---|
| Taylor | 1,940 |
| Austin Chalk | 2,310 |
| Eagle FordEAGLEFORD | 2,470 |
| BudaBUDA LIME | 2,526 |
Perforations
Perforated and open-hole intervals.
| From | To | Type |
|---|---|---|
| 2,310 | 2,550 | Perforated |
Casing
Strings as reported, shallowest first.
| Casing in | Set at | Hole in | Cement |
|---|---|---|---|
| 7 | 2,574 | 9.875 | 602 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 | Sep 18, 1985 | Aug 8, 1985 | — |
| 00 | Sep 17, 1985 | — | — |
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 42-187-32821 → W-2, G-1, plugging reports, as PDFs
- Completion packets for 42-187-32821 → 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/18732821, documented in the API reference.