WELL · 42-059-34934 · DISTRICT 7
Williams R. D. A #A1
Callahan County · Callahan County Regular field · Vertical
Williams R. D. A #A1 (API 42-059-34934) is a plugged well in Callahan County, plugged February 1, 2013, last operated by Diamond S Masada LLC.
The RRC has issued one drilling permit, issued May 4, 1984, permitted to 750 ft.
It was permitted by R.D. Oil Company and has since transferred to Diamond S Masada LLC on the wellbore schedule.
Completion filings report 2 formation tops, including Bluffcreek, Tannyhill Sd.
Its lease has reported 3.54K barrels of oil and 20 mcf of gas since January 1993, last reporting in July 2026. The lease carries 7 wells, so these are lease totals, not this well alone.
Operator of record
Permitted by R.D. Oil Company; the EWA schedule now lists a different operator.
Magnolia, TX · P-5 Y, filed Aug 4, 2025 · 8 permits on file · (713) 882-1777
SOURCE · RRC EWA WELLBORE SCHEDULE
What each RRC source says
| Wellbore schedule | Diamond S Masada LLC |
| Production reports | Diamond S Masada LLCthrough Mar 2009 |
| Latest permit | R.D. Oil CompanyMay 4, 1984 |
The sources disagree, which usually means a transfer or a lease-level production filing by a different entity. Petrora goes with the schedule.
- 750
- total depth, ft
- 1
- permits on file
- May 4, 1984
- last permit issued
- Jun 27, 1991
- completed
- 3.54K
- cumulative oil, bbl
- 20
- cumulative gas, mcf
PRODUCTION FROM PDQ LEASE REPORTS · Jan 1993 THROUGH Jul 2026
Regulatory status · RRC wellbore file
- Schedule
- OFF SCHEDULE
- Completed
- Jun 27, 1991
- Shut in
- —
- Plugged
- Feb 1, 2013
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 7 wells in total, so volumes are shared.Why →
| Lease | Field | Reporting operator | Wells | Oil, bbl | Gas, mcf | Reported |
|---|---|---|---|---|---|---|
| Williams, R. D. "A" O-8-478 | Callahan County Regular | Diamond S Masada LLC | 7 | 3.54K | 20 | Jan 1993 – Jul 2026 |
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.
- 1Wylie Bros. Prod. & Drgl. Co,incJan 1993 → Oct 1997
- 2Sojourner Drilling CorporationNov 1997 → Feb 2006
- 3Diamond S Masada LLCMar 2006 → Mar 2009
Permits
| Permit | Type | Operator | Received | Issued | Spud | Depth |
|---|---|---|---|---|---|---|
| 237894-99 | Drill | R.D. Oil Company | May 4, 1984 | May 4, 1984 | — | 750 |
Completions
| Completed | Lease | Field | Operator | Status | Depth |
|---|---|---|---|---|---|
| — | — O-8-478 | — | — | — | — |
Formation tops
As filed on W-2/G-1. Subsea from 1,700 ft elevation.Download CSV →
| Formation | MD ft | Subsea |
|---|---|---|
| Bluffcreek | 404 | 1,296 |
| Tannyhill SD | 404 | 1,296 |
Perforations
Perforated and open-hole intervals.
| From | To | Type |
|---|---|---|
| 404 | 412 | Perforated |
| — | 412 | Perforated |
Casing
Strings as reported, shallowest first.
| Casing in | Set at | Hole in | Cement |
|---|---|---|---|
| 4.5 | 551 | 6.75 | 140 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 5, 1991 | Jul 29, 1991 | — |
| 00 | Mar 13, 1985 | Dec 12, 1984 | — |
| 00 | Feb 20, 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 42-059-34934 → W-2, G-1, plugging reports, as PDFs
- Completion packets for 42-059-34934 → 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/05934934, documented in the API reference.