WELL · 42-329-35777 · DISTRICT 8
Cass A #1
Midland County · Spraberry (Trend Area) field · Vertical
Cass A #1 (API 42-329-35777) is a plugged well in Midland County, plugged February 16, 2012, last operated by Pioneer Natural Res. USA Inc..
The RRC has issued one drilling permit, issued July 30, 2007, permitted to 10,000 ft.
Completion filings report 6 formation tops, including Top Of Upper Spby, Spraberry, Top Lower Sprabrry, Top Of Lower Spby.
Its lease has reported 82.8K barrels of oil and 149K mcf of gas since November 2007, last reporting in July 2026. The lease carries 3 wells, so these are lease totals, not this well alone.
Operator of record
Spring, TX · P-5 Y, filed May 4, 2026 · 15,619 permits on file · (972) 598-8150
SOURCE · RRC EWA WELLBORE SCHEDULE
What each RRC source says
| Wellbore schedule | Pioneer Natural Res. USA Inc. |
| Production reports | Pioneer Natural Res. USA, Inc.through Oct 2021 |
| Latest permit | Pioneer Natural Res. USA, Inc.Jul 30, 2007 |
- 10,000
- total depth, ft
- 1
- permits on file
- Jul 30, 2007
- last permit issued
- Aug 26, 2011
- completed
- 82.8K
- cumulative oil, bbl
- 149K
- cumulative gas, mcf
PRODUCTION FROM PDQ LEASE REPORTS · Nov 2007 THROUGH Jul 2026
Regulatory status · RRC wellbore file
- Schedule
- OFF SCHEDULE
- Completed
- Aug 26, 2011
- Shut in
- —
- Plugged
- Feb 16, 2012
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 3 wells in total, so volumes are shared.Why →
| Lease | Field | Reporting operator | Wells | Oil, bbl | Gas, mcf | Reported |
|---|---|---|---|---|---|---|
| Cass "A" O-10-38554 | Spraberry (Trend Area) | Pioneer Natural Res. USA, Inc. | 3 | 82.8K | 149K | Nov 2007 – 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.
- 1Pioneer Natural Res. USA, Inc.Nov 2007 → Oct 2021
Permits
| Permit | Type | Operator | Received | Issued | Spud | Depth |
|---|---|---|---|---|---|---|
| 642671-99 | Drill | Pioneer Natural Res. USA, Inc. | Jul 17, 2007 | Jul 30, 2007 | Aug 31, 2007 | 10,000 |
Completions
| Completed | Lease | Field | Operator | Status | Depth |
|---|---|---|---|---|---|
| — | — O-10-38554 | — | — | — | — |
Formation tops
As filed on W-2/G-1. Subsea from 2,812 ft elevation.Download CSV →
| Formation | MD ft | Subsea |
|---|---|---|
| Top of Upper Spby | 7,830 | -5,018 |
| SpraberryTOP UPPER SPRABERRY | 7,830 | -5,018 |
| SpraberryTOP LOWER SPRABERRY | 8,394 | -5,582 |
| Top Lower Sprabrry | 8,394 | -5,582 |
| Top of Lower Spby | 8,394 | -5,582 |
| DeanTOP OF DEAN | 9,363 | -6,551 |
| DeanTOP DEAN | 9,426 | -6,614 |
| DeanTOP OF DEAN | 9,426 | -6,614 |
| WolfcampTOP OF WOLFCAMP | 9,633 | -6,821 |
| WolfcampTOP WOLFCAMP | 9,633 | -6,821 |
Perforations
Perforated and open-hole intervals.
| From | To | Type |
|---|---|---|
| 7,831 | 7,943 | Perforated |
| 8,627 | 8,721 | Perforated |
| 9,196 | 9,363 | Perforated |
| 9,464 | 10,208 | Perforated |
Casing
Strings as reported, shallowest first.
| Casing in | Set at | Hole in | Cement |
|---|---|---|---|
| 8.625 | 354 | 11 | 200 S |
| 4.5 | 10,467 | 7.875 | 1,390 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 26, 2012 | Sep 8, 2011 | — |
| 00 | Oct 2, 2012 | Dec 20, 2010 | — |
| 00 | Jul 22, 2010 | Mar 22, 2010 | — |
| 00 | Mar 9, 2010 | Oct 5, 2009 | — |
| 00 | Mar 18, 2008 | Jan 16, 2008 | Yes |
| 00 | Feb 20, 2008 | — | — |
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 42-329-35777 → W-2, G-1, plugging reports, as PDFs
- Completion packets for 42-329-35777 → 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/32935777, documented in the API reference.