TEXAS · WELLS · MARTIN COUNTY · COX 10 LEASE · API 42-317-43890 · DISTRICT 7B
Cox 10 #4
Martin County · Spraberry (Trend Area) field · Producing · Vertical
Cox 10 #4 (API 42-317-43890) is a well in Martin County operated by Pioneer Natural Res. USA Inc., completed February 17, 2022 and listed as producing on the RRC schedule.
The RRC has issued one drilling permit, issued November 3, 2021, permitted to 10,006 ft.
Completion filings report 10 formation tops, including Santa Rosa, Yates, Queen, Grayburg.
Its lease has reported 31.7K barrels of oil and 37.6K mcf of gas since February 2022, last reporting in July 2026.
Operator of record
- Based in
- Spring, TX
- P-5 status
- Active (A)
- P-5 last filed
- Jul 8, 2026
- Permits on file
- 15,628
- Phone
- (972) 444-4001
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 Apr 2026 |
| Latest permit | Pioneer Natural Res. USA, Inc.Nov 3, 2021 |
- 10,006
- total depth, ft
- 1
- permits on file
- Nov 3, 2021
- last permit issued
- Feb 17, 2022
- completed
- 31.7K
- cumulative oil, bbl
- 37.6K
- cumulative gas, mcf
PRODUCTION FROM PDQ LEASE REPORTS · Feb 2022 THROUGH Jul 2026
Regulatory status · RRC wellbore file
- Schedule
- ON SCHEDULE
- Completed
- Feb 17, 2022
- Shut in
- —
- Plugged
- —
Operator's P-5 on the schedule: Active (A)
Surface location
32.320169, -102.030310
Permit surface location from the RRC GIS record, in Martin County.
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; this well is the only one on it.Why →
| Lease | Field | Reporting operator | Wells | Oil, bbl | Gas, mcf | Reported |
|---|---|---|---|---|---|---|
| Cox 10 O-10-57283 | Spraberry (Trend Area) | Pioneer Natural Res. USA, Inc. | 1 | 31.7K | 37.6K | Feb 2022 – Jul 2026 |
Oil, barrels lease total
Last 12 months 4,069 · prior 12 4,493(-9%)
Gas, mcf lease total
Last 12 months 5,095 · prior 12 5,220(-2%)
Chain of custody
Every operator that reported production on this well's lease, in order.
- 1Pioneer Natural Res. USA, Inc.Mar 2022 → Apr 2026
Permits
| Permit | Type | Operator | Received | Issued | Spud | Depth |
|---|---|---|---|---|---|---|
| 874059-99 | Drill | Pioneer Natural Res. USA, Inc. | Oct 28, 2021 | Nov 3, 2021 | Dec 15, 2021 | 10,896 |
Completions
| Completed | Lease | Field | Operator | Status | Depth |
|---|---|---|---|---|---|
| Feb 17, 2022 | Cox 10 O-10-57283 | Spraberry (Trend Area) | Pioneer Natural Res. USA Inc. | Producing | 10,006 |
Formation tops
As filed on W-2/G-1. Subsea from 2,876 ft elevation.Download CSV →
| Formation | MD ft | Subsea |
|---|---|---|
| Santa Rosa | 1,437 | 1,439 |
| Yates | 2,821 | 55 |
| Queen | 3,718 | -842 |
| Grayburg | 4,173 | -1,297 |
| San AndresSAN ANDRES - ACTIVE CO2 FLOOD; H | 4,380 | -1,504 |
| Spraberry | 7,905 | -5,029 |
| Dean | 9,205 | -6,329 |
| Wolfcamp | 9,455 | -6,579 |
| Cisco | — | — |
| Pennsylvanian | — | — |
Perforations
Perforated and open-hole intervals.
| From | To | Type |
|---|---|---|
| 8,228 | 9,900 | Perforated |
Casing
Strings as reported, shallowest first.
| Casing in | Set at | Hole in | Cement |
|---|---|---|---|
| 13.375 | 1,829 | 17.5 | 1,632 S |
| 9.625 | 6,582 | 12.25 | 1,093 S |
| 5.5 | 9,995 | 8.75 | 980 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 12, 2022 | Aug 1, 2022 | — |
| 00 | Aug 23, 2022 | May 16, 2022 | Yes |
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 42-317-43890 → W-2, G-1, plugging reports, as PDFs
- Completion packets for 42-317-43890 → 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.
Nearby wells and their tops
NEAREST 8 LOCATED WELLS WITH TOPS · WITHIN 16 KM
Draw a cross-section
This well's tops beside its 5 nearest neighbors, subsea-aligned so they line up regardless of surface terrain.
Glaze, J.L.42-317-43612
0.4 KM · Pioneer Natural Res. USA, Inc. · Section with this well →
| Santa Rosa | 1,358 | 1,504 |
| Yates | 3,001 | -139 |
| Queen | 3,801 | -939 |
| Grayburg | 4,464 | -1,602 |
| San Andres | 4,617 | -1,755 |
| Spraberry | 7,909 | -5,047 |
| Dean | 9,183 | -6,321 |
| Wolfcamp | 9,471 | -6,609 |
10 TOPS · FIRST 8
Cox 9-12 Unit 242-317-41226
0.7 KM · Endeavor Energy Resources L.P. · Section with this well →
| Santa Rosa | 1,000 | 1,840 |
| Yates | 1,250 | 1,590 |
| Queen | 1,300 | 1,540 |
| Grayburg | 4,395 | -1,555 |
| San Andres | 4,615 | -1,775 |
| Cisco | 5,260 | -2,420 |
| Spraberry | 7,888 | -5,048 |
| Dean | 9,178 | -6,338 |
10 TOPS · FIRST 8
Cox 9-12 Unit 242-317-41228
0.7 KM · Endeavor Energy Resources L.P. · Section with this well →
| Santa Rosa | 1,000 | 1,840 |
| Yates | 1,250 | 1,590 |
| Queen | 1,300 | 1,540 |
| Grayburg | 4,395 | -1,555 |
| San Andres | 4,615 | -1,775 |
| Cisco | 5,260 | -2,420 |
| Spraberry | 7,888 | -5,048 |
| Dean | 9,178 | -6,338 |
10 TOPS · FIRST 8
Cox 9-12 Unit 242-317-41229
0.7 KM · Endeavor Energy Resources L.P. · Section with this well →
| Santa Rosa | 1,000 | 1,840 |
| Yates | 1,250 | 1,590 |
| Queen | 1,300 | 1,540 |
| Grayburg | 4,395 | -1,555 |
| San Andres | 4,615 | -1,775 |
| Cisco | 5,260 | -2,420 |
| Spraberry | 7,888 | -5,048 |
| Dean | 9,178 | -6,338 |
10 TOPS · FIRST 8
Cox 9-12 Unit 242-317-41230
0.8 KM · Endeavor Energy Resources L.P. · Section with this well →
| Santa Rosa | 1,000 | 1,840 |
| Yates | 1,250 | 1,590 |
| Queen | 1,300 | 1,540 |
| Grayburg | 4,395 | -1,555 |
| San Andres | 4,615 | -1,775 |
| Cisco | 5,260 | -2,420 |
| Spraberry | 7,888 | -5,048 |
| Dean | 8,693 | -5,853 |
10 TOPS · FIRST 8
Cox 9-12 Unit 242-317-41231
0.8 KM · Endeavor Energy Resources L.P. · Section with this well →
| Santa Rosa | 1,000 | 1,840 |
| Yates | 1,250 | 1,590 |
| Queen | 1,300 | 1,540 |
| Grayburg | 4,395 | -1,555 |
| San Andres | 4,615 | -1,775 |
| Cisco | 5,005 | -2,165 |
| Spraberry | 7,888 | -5,048 |
| Dean | 9,175 | -6,335 |
10 TOPS · FIRST 8
Campbell42-317-46623
0.9 KM · Diamondback E&P LLC · Section with this well →
| Glorieta | 5,556 | -2,714 |
| Clear Fork | 6,539 | -3,697 |
| Spraberry | 7,938 | -5,096 |
| Jo Mill | 8,437 | -5,595 |
| Yates | — | |
| Dean | — | |
| Grayburg | — | |
| Queen | — |
10 TOPS · FIRST 8
Campbell42-317-46620
0.9 KM · Diamondback E&P LLC · Section with this well →
| Spraberry | 7,936 | -5,093 |
| Cisco | — | |
| Pennsylvanian | — | |
| Dean | — | |
| Grayburg | — | |
| San Andres | — | |
| Santa Rosa | — | |
| Wolfcamp | — |
10 TOPS · FIRST 8
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/31743890, documented in the API reference.