WELL · 42-461-35455 · DISTRICT 7
XBC 85 #857
Upton County · Spraberry (Trend Area) field · Vertical
Xbc 85 #857 (API 42-461-35455) is a well in Upton County operated by Pioneer Natural Res. USA Inc., completed November 30, 2007.
The RRC has issued 2 drilling permits between 2007 and 2014, permitted to 11,000 ft.
Completion filings report 3 formation tops, including Spraberry, Dean, Wolfcamp.
Its 2 leases have reported 23.1K barrels of oil and 55.3K mcf of gas since November 2007, last reporting in July 2026. The leases carry 3 wells, so these are lease totals, not this well alone.
Operator of record
Spring, TX · P-5 Y, filed May 4, 2026 · 15,618 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 Aug 2020 |
| Latest permit | Pioneer Natural Res. USA, Inc.Oct 14, 2014 |
- 11,000
- total depth, ft
- 2
- permits on file
- Oct 14, 2014
- last permit issued
- Nov 30, 2007
- completed
- 23.1K
- cumulative oil, bbl
- 55.3K
- cumulative gas, mcf
PRODUCTION FROM PDQ LEASE REPORTS · Nov 2007 THROUGH Jul 2026
Regulatory status · RRC wellbore file
- Schedule
- OFF SCHEDULE
- Completed
- Nov 30, 2007
- Shut in
- —
- Plugged
- —
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 2 leases 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 |
|---|---|---|---|---|---|---|
| Pembrook 15 O-9-18667 | Spraberry (Trend Area) R 40 Exc | Pioneer Natural Res. USA, Inc. | 2 | 14.2K | 34K | Nov 2012 – Jul 2026 |
| XBC "85" O-9-16482 | Spraberry (Trend Area) | Pioneer Natural Res. USA, Inc. | 1 | 8.95K | 21.3K | Nov 2007 – Jan 2015 |
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.Dec 2007 → Nov 2018
Permits
| Permit | Type | Operator | Received | Issued | Spud | Depth |
|---|---|---|---|---|---|---|
| 797388-99 | Field transfer | Pioneer Natural Res. USA, Inc. | Sep 30, 2014 | Oct 14, 2014 | Sep 29, 2007 | 10,335 |
| 644614-99 | Drill | Pioneer Natural Res. USA, Inc. | Aug 17, 2007 | Aug 20, 2007 | Sep 29, 2007 | 11,000 |
Completions
| Completed | Lease | Field | Operator | Status | Depth |
|---|---|---|---|---|---|
| — | — O-9-16482 | — | — | — | — |
| — | — O-9-18667 | — | — | — | — |
Formation tops
As filed on W-2/G-1. Subsea from 2,683 ft elevation.Download CSV →
Perforations
Perforated and open-hole intervals.
| From | To | Type |
|---|---|---|
| 8,345 | 8,471 | Perforated |
| 8,345 | 9,931 | Perforated |
| 8,669 | 8,787 | Perforated |
| 8,911 | 9,062 | Perforated |
| 9,163 | 9,353 | Perforated |
| 9,569 | 9,931 | Perforated |
Casing
Strings as reported, shallowest first.
| Casing in | Set at | Hole in | Cement |
|---|---|---|---|
| 8.625 | 523 | 11 | 250 S |
| 8.625 | 529 | 11 | 250 S |
| 4.5 | 10,330 | 7.875 | 1,050 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 | Feb 6, 2019 | Jan 17, 2019 | — |
| 00 | Nov 26, 2014 | Oct 23, 2014 | Yes |
| 00 | Mar 26, 2008 | Feb 4, 2008 | Yes |
| 00 | Mar 10, 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 42-461-35455 → W-2, G-1, plugging reports, as PDFs
- Completion packets for 42-461-35455 → scanned completion filings
Log images are in archives with no per-well link: the RRC's Neubus archive (2004 onward) and the University Lands library. 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/46135455, documented in the API reference.