WELL · 42-329-31855 · DISTRICT 8
Preston Sam A #11
Midland County · Spraberry(trend Area Dean-Wlfcp) field · Vertical
Preston Sam A #11 (API 42-329-31855) is a plugged well in Midland County, plugged December 19, 2019, last operated by Parker & Parsley Development CO..
The RRC has issued one drilling permit, issued June 18, 1987, permitted to 9,200 ft.
It was permitted by Mobil Producing TX. & N.M. Inc. and has since transferred to Parker & Parsley Development CO. on the wellbore schedule.
Completion filings report 5 formation tops, including Spraberry, Top Upr Sprby, Top Lwr Sprby, Dean.
Its 3 leases have reported 17.9M barrels of oil and 54.4M mcf of gas since January 1993, last reporting in July 2026. The leases carry 399 wells, so these are lease totals, not this well alone.
Operator of record
Parker & Parsley Development Co.
Permitted by Mobil Producing TX. & N.M. Inc.; the EWA schedule now lists a different operator.
Midland, TX · P-5 Y, filed Oct 6, 1995 · 961 permits on file
SOURCE · RRC EWA WELLBORE SCHEDULE
What each RRC source says
| Wellbore schedule | Parker & Parsley Development Co. |
| Production reports | Pioneer Natural Res. USA, Inc.through Feb 2026 |
| Latest permit | Mobil Producing TX. & N.M. Inc.Jun 18, 1987 |
The sources disagree, which usually means a transfer or a lease-level production filing by a different entity. Petrora goes with the schedule.
- 9,200
- total depth, ft
- 1
- permits on file
- Jun 18, 1987
- last permit issued
- Jan 4, 1988
- completed
- 17.9M
- cumulative oil, bbl
- 54.4M
- cumulative gas, mcf
PRODUCTION FROM PDQ LEASE REPORTS · Jan 1993 THROUGH Jul 2026
Regulatory status · RRC wellbore file
- Schedule
- OFF SCHEDULE
- Completed
- Jan 4, 1988
- Shut in
- —
- Plugged
- Dec 19, 2019
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 3 leases this well is completed on; they carry 399 wells in total, so volumes are shared.Why →
| Lease | Field | Reporting operator | Wells | Oil, bbl | Gas, mcf | Reported |
|---|---|---|---|---|---|---|
| Preston Spraberry Unit O-10-18551 | Spraberry (Trend Area) | Pioneer Natural Res. USA, Inc. | 391 | 17.8M | 54.3M | Jan 1993 – Jul 2026 |
| Preston, Sam -A- O-10-33717 | Spraberry (Trend Area) | Pioneer Natural Res. USA, Inc. | 4 | 30.2K | 56.9K | Mar 1993 – Oct 1997 |
| Preston, Sam "A" O-10-24963 | Spraberry(trend Area Dean-Wlfcp) | Parker & Parsley Development Co. | 4 | 1.81K | 2.78K | Jan 1993 – May 1993 |
Oil, barrels lease total
Last 12 months 84,304 · prior 12 181,969(-54%)
Gas, mcf lease total
Last 12 months 435,059 · prior 12 736,247(-41%)
Chain of custody
Every operator that reported production on this well's lease, in order.
- 1Parker & Parsley Development Co.Jan 1993 → Feb 1995
- 2Parker & Parsley Development L.PMar 1995 → Aug 1997
- 3Pioneer Natural Res. USA, Inc.Sep 1997 → Feb 2026
Permits
| Permit | Type | Operator | Received | Issued | Spud | Depth |
|---|---|---|---|---|---|---|
| 331670-99 | Drill | Mobil Producing TX. & N.M. Inc. | Jun 16, 1987 | Jun 18, 1987 | — | 9,200 |
Completions
| Completed | Lease | Field | Operator | Status | Depth |
|---|---|---|---|---|---|
| — | — O-10-18551 | — | — | — | — |
| — | — O-10-24963 | — | — | — | — |
| — | — O-10-33717 | — | — | — | — |
Formation tops
As filed on W-2/G-1. Subsea from 2,715 ft elevation.Download CSV →
Perforations
Perforated and open-hole intervals.
| From | To | Type |
|---|---|---|
| 7,145 | 7,341 | Perforated |
| 7,959 | 8,082 | Perforated |
| 8,645 | 8,739 | Perforated |
Casing
Strings as reported, shallowest first.
| Casing in | Set at | Hole in | Cement |
|---|---|---|---|
| 13.375 | 423 | 17.5 | 450 S |
| 8.625 | 5,350 | 12.25 | 2,500 S |
| 5.5 | 9,099 | 7.875 | 1,850 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 | Oct 2, 1997 | Aug 14, 1997 | Yes |
| 00 | Sep 24, 1997 | Feb 16, 1988 | Yes |
| 00 | Mar 17, 1993 | Feb 16, 1988 | Yes |
| 00 | Mar 1, 1988 | Feb 16, 1988 | Yes |
| 00 | Feb 25, 1988 | — | — |
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 42-329-31855 → W-2, G-1, plugging reports, as PDFs
- Completion packets for 42-329-31855 → 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/32931855, documented in the API reference.