TEXAS · WELLS · MARTIN COUNTY · COX 9-12 UNIT 2 LEASE · API 42-317-41230 · DISTRICT 7B
Cox 9-12 Unit 2 #173
Martin County · Spraberry (Trend Area) field · Shut In · Horizontal
Cox 9-12 Unit 2 #173 (API 42-317-41230) is a horizontal well in Martin County operated by Diamondback E&P LLC, completed November 7, 2018 and listed as shut in on the RRC schedule.
The RRC has issued one drilling permit (amended once), issued January 30, 2018, permitted to 9,151 ft.
It was permitted by Endeavor Energy Resources L.P. and has since transferred to Diamondback E&P LLC on the wellbore schedule.
Completion filings report 10 formation tops, including Santa Rosa, Yates, Queen, Grayburg.
Its lease has reported 2.33M barrels of oil and 5.34M mcf of gas since November 2018, last reporting in July 2026. The lease carries 13 wells, so these are lease totals, not this well alone.
Operator of record
Permitted by Endeavor Energy Resources L.P.; the EWA schedule now lists a different operator.
- Based in
- Midland, TX
- P-5 status
- Active – Extension (X)
- P-5 last filed
- May 4, 2026
- Permits on file
- 5,237
- Phone
- (432) 221-7400
SOURCE · RRC EWA WELLBORE SCHEDULE
What each RRC source says
| Wellbore schedule | Diamondback E&P LLC |
| Production reports | Diamondback E&P LLCthrough Apr 2026 |
| Latest permit | Endeavor Energy Resources L.P.Jan 30, 2018 |
The sources disagree, which usually means a transfer or a lease-level production filing by a different entity. Petrora goes with the schedule.
- 9,151
- total depth, ft
- 2
- permits on file
- Jan 30, 2018
- last permit issued
- Nov 7, 2018
- completed
- 2.33M
- cumulative oil, bbl
- 5.34M
- cumulative gas, mcf
PRODUCTION FROM PDQ LEASE REPORTS · Nov 2018 THROUGH Jul 2026
Regulatory status · RRC wellbore file
- Schedule
- ON SCHEDULE
- Completed
- Nov 7, 2018
- Shut in
- —
- Plugged
- —
Operator's P-5 on the schedule: Active (A)
Surface location
32.322450, -102.022762
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; they carry 13 wells in total, so volumes are shared.Why →
| Lease | Field | Reporting operator | Wells | Oil, bbl | Gas, mcf | Reported |
|---|---|---|---|---|---|---|
| Cox 9-12 Unit 2 O-10-51547 | Spraberry (Trend Area) | Diamondback E&P LLC | 13 | 2.33M | 5.34M | Nov 2018 – Jul 2026 |
Oil, barrels lease total
Last 12 months 538,464 · prior 12 642,280(-16%)
Gas, mcf lease total
Last 12 months 2,102,656 · prior 12 1,024,988(+105%)
Chain of custody
Every operator that reported production on this well's lease, in order.
- 1Endeavor Energy Resources L.P.Nov 2018 → Dec 2024
- 2Diamondback E&P LLCJan 2025 → Apr 2026
Permits
| Permit | Type | Operator | Received | Issued | Spud | Depth |
|---|---|---|---|---|---|---|
| 835402-98 | Drill | Endeavor Energy Resources L.P. | Apr 27, 2018 | Jan 30, 2018 | Jun 14, 2018 | 11,000 |
| 835402-99 | Drill | Endeavor Energy Resources L.P. | Jan 19, 2018 | Jan 30, 2018 | Jun 13, 2018 | 11,000 |
Completions
| Completed | Lease | Field | Operator | Status | Depth |
|---|---|---|---|---|---|
| Nov 7, 2018 | Cox 9-12 Unit 2 O-10-51547 | Spraberry (Trend Area) | Diamondback E&P LLC | Shut In | 9,151 |
Formation tops
As filed on W-2/G-1. Subsea from 2,840 ft elevation.Download CSV →
| Formation | MD ft | Subsea |
|---|---|---|
| Santa Rosa | 1,000 | 1,840 |
| Yates | 1,250 | 1,590 |
| Queen | 1,300 | 1,540 |
| Grayburg | 4,395 | -1,555 |
| San AndresSAN ANDRES - ACTIVE CO2 FLOOD; H | 4,615 | -1,775 |
| Cisco | 5,260 | -2,420 |
| Spraberry | 7,888 | -5,048 |
| Dean | 8,693 | -5,853 |
| Pennsylvanian | — | — |
| Wolfcamp | — | — |
Perforations
Perforated and open-hole intervals.
| From | To | Type |
|---|---|---|
| 9,673 | 16,574 | Perforated |
Casing
Strings as reported, shallowest first.
| Casing in | Set at | Hole in | Cement |
|---|---|---|---|
| 13.375 | 1,890 | 17.5 | 1,490 S |
| 9.625 | 6,600 | 12.25 | 1,540 S |
| 5.5 | 16,697 | 8.5 | 2,515 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 | Jun 18, 2019 | Apr 2, 2019 | 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 42-317-41230 → W-2, G-1, plugging reports, as PDFs
- Completion packets for 42-317-41230 → 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.
Cox 9-12 Unit 242-317-41229
0.0 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 242-317-41231
0.0 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
Cox 9-12 Unit 242-317-41228
0.0 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 242-317-41226
0.0 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
Campbell East 9-321 E42-317-46681
0.5 KM · Diamondback E&P LLC · Section with this well →
| San Andres | 5,563 | -2,720 |
| Spraberry | 7,895 | -5,052 |
| Santa Rosa | — | |
| Yates | — | |
| Wolfcamp | — | |
| Queen | — | |
| Pennsylvanian | — | |
| Grayburg | — |
10 TOPS · FIRST 8
Campbell East 9-321 D42-317-46680
0.5 KM · Diamondback E&P LLC · Section with this well →
| Glorieta | 5,565 | -2,722 |
| Clear Fork | 6,518 | -3,675 |
| Spraberry | 7,897 | -5,054 |
| Dean | 9,197 | -6,354 |
| Wolfcamp | 9,488 | -6,645 |
| Yates | — | |
| Grayburg | — | |
| Queen | — |
10 TOPS · FIRST 8
Campbell East 9-321 C42-317-46679
0.5 KM · Diamondback E&P LLC · Section with this well →
| Glorieta | 5,555 | -2,712 |
| Clear Fork | 6,523 | -3,680 |
| Spraberry | 7,910 | -5,067 |
| Dean | 9,197 | -6,354 |
| Wolfcamp | 9,448 | -6,605 |
| San Andres | — | |
| Queen | — | |
| Grayburg | — |
10 TOPS · FIRST 8
Campbell East 9-321 A42-317-46673
0.5 KM · Diamondback E&P LLC · Section with this well →
| San Andres | 5,556 | -2,712 |
| Clear Fork | 6,540 | -3,696 |
| Spraberry | 7,948 | -5,104 |
| Yates | — | |
| Grayburg | — | |
| Dean | — | |
| Cisco | — | |
| Queen | — |
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/31741230, documented in the API reference.