TEXAS · WELLS · FRIO COUNTY · MCWILLIAMS HEIRS A LEASE · API 42-163-33393 · DISTRICT 01
McWilliams Heirs A #1
Frio County · Doering Ranch (Georgetown) field · Vertical
Mcwilliams Heirs A #1 (API 42-163-33393) is a plugged well in Frio County, plugged July 14, 2025, last operated by Trailblazer Energy Resources LLC.
The RRC has issued one drilling permit (amended once), issued December 5, 2008, permitted to 7,000 ft.
It was permitted by Virtex Operating Company, Inc. and has since transferred to Trailblazer Energy Resources LLC on the wellbore schedule.
Completion filings report 4 formation tops, including Midway, Escondido, Olmos, Buda.
Its lease has reported 484K barrels of oil and 3.4M mcf of gas since May 2009, last reporting volume in April 2026. The lease carries 8 wells, so these are lease totals, not this well alone.
Operator of record
Trailblazer Energy Resources LLC
Permitted by Virtex Operating Company, Inc.; the EWA schedule now lists a different operator.
- Based in
- Tulsa, OK
- P-5 status
- Active (A)
- P-5 last filed
- Oct 16, 2025
- Permits on file
- 30
- Phone
- (918) 728-3020
SOURCE · RRC EWA WELLBORE SCHEDULE
What each RRC source says
| Wellbore schedule | Trailblazer Energy Resources LLC |
| Production reports | Trailblazer Energy Resources,llcthrough Apr 2026 |
| Latest permit | Virtex Operating Company, Inc.Dec 5, 2008 |
The sources disagree, which usually means a transfer or a lease-level production filing by a different entity. Petrora goes with the schedule.
- 7,000
- total depth, ft
- 2
- permits on file
- Dec 5, 2008
- last permit issued
- Dec 5, 2010
- completed
- 484K
- cumulative oil, bbl
- 3.4M
- cumulative gas, mcf
PRODUCTION FROM PDQ LEASE REPORTS · May 2009 THROUGH Apr 2026
Regulatory status · RRC wellbore file
- Schedule
- OFF SCHEDULE
- Completed
- Dec 5, 2010
- Shut in
- —
- Plugged
- Jul 14, 2025
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 8 wells in total, so volumes are shared.Why →
| Lease | Field | Reporting operator | Wells | Oil, bbl | Gas, mcf | Reported |
|---|---|---|---|---|---|---|
| McWilliams Heirs A O-1-15060 | Doering Ranch (Georgetown) | Trailblazer Energy Resources,llc | 8 | 484K | 3.4M | May 2009 – Apr 2026 |
Gas, mcf lease total
Last 12 months 93,870 · prior 12 87,812(+7%)
Oil, barrels lease total
Last 12 months 3,759 · prior 12 5,070(-26%)
Chain of custody
Every operator that reported production on this well's lease, in order.
- 1Virtex Operating Company, Inc.May 2009 → Aug 2023
- 2Trailblazer Energy Resources,llcSep 2023 → Apr 2026
Permits
| Permit | Type | Operator | Received | Issued | Spud | Depth |
|---|---|---|---|---|---|---|
| 675671-98 | Drill | Virtex Operating Company, Inc. | Sep 30, 2010 | Dec 5, 2008 | Oct 15, 2010 | 7,000 |
| 675671-99 | Drill | Virtex Operating Company, Inc. | Dec 1, 2008 | Dec 5, 2008 | — | 7,000 |
Completions
| Completed | Lease | Field | Operator | Status | Depth |
|---|---|---|---|---|---|
| Dec 5, 2010 | McWilliams Heirs A O-1-15060 | Doering Ranch (Georgetown) | Trailblazer Energy Resources LLC | Plugged | — |
Formation tops
As filed on W-2/G-1. Subsea from 545 ft elevation.Download CSV →
Perforations
Perforated and open-hole intervals.
| From | To | Type |
|---|---|---|
| 6,041 | 6,143 | Perforated |
Casing
Strings as reported, shallowest first.
| Casing in | Set at | Hole in | Cement |
|---|---|---|---|
| 10.75 | 673 | 13.5 | 280 S |
| 4.5 | 6,458 | 9.875 | 1,085 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. The record date is the RRC's own date on the record, not the day the report was filed: 462,034 of the state's filings carry 1984-01-12. About these reports →
| Suffix | RRC record date | W-2 / G-1 date | Logs referenced |
|---|---|---|---|
| 00 | Aug 29, 2011 | Jan 7, 2011 | Yes |
Well logs
1 log loaded from the RRC's log index, the latest received Oct 10, 2013. Density, Neutron, Resistivity. These are the logs loaded into Petrora from the Railroad Commission's inventories, not necessarily every log run on the well. The RRC holds the files; each opens from its log search for the well. The kind is the RRC's description of the log; the interval is the one filed for it.
Open the RRC's log search for this well ↗| Logas described | Files | Intervalft, as filed | Datereceived | SizeMB |
|---|---|---|---|---|
| COMBINATION: RESISTIVITY/NEUTRON/DENSITY POROSITYSpans Midway, Escondido, Olmos, Buda | TIFF | 675 to 6,468 | Oct 10, 2013run Oct 24, 2010 | 1.40 |
"Spans" is by this well's own filed formation tops: a formation runs from its top to the next deeper top filed, and the deepest runs to the bottom of the log. Depths are measured along the wellbore, so on a horizontal the lateral counts in the formation it was landed in.
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 42-163-33393 → W-2, G-1, plugging reports, as PDFs
- Completion packets for 42-163-33393 → scanned completion filings
The logs loaded for this well are under Well logs, with the RRC's log search for it.
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/16333393, documented in the API reference.