WELL · 42-003-47604 · DISTRICT 8
UL Mason West Unit #10LS
Andrews County · Spraberry (Trend Area) field · Producing · Horizontal
UL Mason West Unit #10LS (API 42-003-47604) is a horizontal well in Andrews County operated by Diamondback E&P LLC, completed March 2, 2022 and listed as producing on the RRC schedule.
The RRC has issued one drilling permit, issued July 21, 2017, permitted to 10,590 ft.
Completion filings report 10 formation tops, including Yates, Seven Rivers, Queen, Grayburg.
Its lease has reported 2.59M barrels of oil and 2.47M mcf of gas since July 2017, last reporting in July 2026. The lease carries 11 wells, so these are lease totals, not this well alone.
Operator of record
Midland, TX · P-5 Y, filed Mar 4, 2026 · 5,237 permits on file · (855) 247-5920
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 | Diamondback E&P LLCJul 21, 2017 |
- 10,590
- total depth, ft
- 1
- permits on file
- Jul 21, 2017
- last permit issued
- Mar 2, 2022
- completed
- 2.59M
- cumulative oil, bbl
- 2.47M
- cumulative gas, mcf
PRODUCTION FROM PDQ LEASE REPORTS · Jul 2017 THROUGH Jul 2026
Regulatory status · RRC wellbore file
- Schedule
- ON SCHEDULE
- Completed
- Mar 2, 2022
- Shut in
- —
- Plugged
- —
Operator's P-5 on the schedule: X
Surface location
32.415753, -102.237368
OpenStreetMap → · Google Maps →
Permit surface location from the RRC GIS record, in Andrews 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 11 wells in total, so volumes are shared.Why →
| Lease | Field | Reporting operator | Wells | Oil, bbl | Gas, mcf | Reported |
|---|---|---|---|---|---|---|
| UL Mason West Unit O-10-49200 | Spraberry (Trend Area) | Diamondback E&P LLC | 11 | 2.59M | 2.47M | Jul 2017 – Jul 2026 |
Oil, barrels lease total
Last 12 months 130,828 · prior 12 130,052(+1%)
Gas, mcf lease total
Last 12 months 114,280 · prior 12 83,716(+37%)
Chain of custody
Every operator that reported production on this well's lease, in order.
- 1Diamondback E&P LLCJul 2017 → Apr 2026
Permits
| Permit | Type | Operator | Received | Issued | Spud | Depth |
|---|---|---|---|---|---|---|
| 829051-99 | Drill | Diamondback E&P LLC | Jul 20, 2017 | Jul 21, 2017 | Oct 7, 2017 | 10,590 |
Completions
| Completed | Lease | Field | Operator | Status | Depth |
|---|---|---|---|---|---|
| — | — O-10-49200 | — | — | — | — |
Formation tops
As filed on W-2/G-1. Subsea from 2,954 ft elevation.Download CSV →
| Formation | MD ft | Subsea |
|---|---|---|
| Yates | 3,100 | -146 |
| Seven Rivers | 3,378 | -424 |
| Queen | 3,779 | -825 |
| Grayburg | 4,203 | -1,249 |
| San AndresSAN ANDRES - CO2 FLOOD, HIGH FLO | 4,679 | -1,725 |
| Holt | 5,253 | -2,299 |
| Glorieta | 5,510 | -2,556 |
| Clear ForkCLEARFORK | 6,686 | -3,732 |
| Permian (undifferentiated)PERMIAN DETRITAL | — | — |
| Tubb | — | — |
Perforations
Perforated and open-hole intervals.
| From | To | Type |
|---|---|---|
| 9,987 | 22,884 | Perforated |
Casing
Strings as reported, shallowest first.
| Casing in | Set at | Hole in | Cement |
|---|---|---|---|
| 13.375 | 1,940 | 17.5 | 1,580 S |
| 9.625 | 6,078 | 12.25 | 1,248 S |
| 5.5 | 23,073 | 8.75 | 3,406 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 13, 2025 | May 20, 2025 | — |
| 00 | Nov 2, 2022 | Oct 24, 2022 | — |
| 00 | Aug 3, 2018 | May 23, 2018 | 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 42-003-47604 → W-2, G-1, plugging reports, as PDFs
- Completion packets for 42-003-47604 → 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 neighbours, subsea-aligned so they line up regardless of surface terrain.
UL Mason West Unit42-003-47605
0.0 KM · Diamondback E&P LLC · Section with this well →
| Yates | 3,100 | -146 |
| Seven Rivers | 3,377 | -423 |
| Queen | 3,782 | -828 |
| Grayburg | 4,207 | -1,253 |
| San Andres | 4,685 | -1,731 |
| Holt | 5,225 | -2,271 |
| Glorieta | 5,524 | -2,570 |
| Clear Fork | 6,687 | -3,733 |
10 TOPS · FIRST 8
University 7-10 Unit42-003-46685
0.2 KM · W&T Offshore, Inc. · Section with this well →
| Santa Rosa | 1,522 | 1,411 |
| Yates | 1,522 | 1,411 |
| Seven Rivers | 3,287 | -354 |
| Queen | 4,612 | -1,679 |
| Grayburg | 4,656 | -1,723 |
| San Andres | 4,856 | -1,923 |
| Glorieta | 5,736 | -2,803 |
| Clear Fork | 6,683 | -3,750 |
11 TOPS · FIRST 8
UL Lake Valley 10-19 A42-003-48587
0.4 KM · Diamondback E&P LLC · Section with this well →
| Yates | 3,135 | -179 |
| Seven Rivers | 3,350 | -394 |
| Queen | 3,763 | -807 |
| Grayburg | 4,240 | -1,284 |
| San Andres | 4,699 | -1,743 |
| Glorieta | 5,772 | -2,816 |
| Clear Fork | 6,706 | -3,750 |
| Holt | — |
18 TOPS · FIRST 8
UL Lake Valley 10-19 B42-003-48588
0.4 KM · Diamondback E&P LLC · Section with this well →
| Yates | 3,134 | -178 |
| Seven Rivers | 3,349 | -393 |
| Queen | 3,753 | -797 |
| Grayburg | 4,237 | -1,281 |
| San Andres | 4,697 | -1,741 |
| Glorieta | 5,771 | -2,815 |
| Clear Fork | 6,707 | -3,751 |
| Holt | — |
10 TOPS · FIRST 8
UL Lake Valley 10-19 F42-003-48592
0.4 KM · Diamondback E&P LLC · Section with this well →
| Yates | 3,137 | -1,146 |
| Seven Rivers | 3,353 | -1,362 |
| Queen | 3,755 | -1,764 |
| Grayburg | 4,238 | -2,247 |
| San Andres | 4,702 | -2,711 |
| Glorieta | 5,774 | -3,783 |
| Clear Fork | 6,711 | -4,720 |
| Permian (undifferentiated) | — |
10 TOPS · FIRST 8
UL Lake Valley 10-19 C42-003-48589
0.4 KM · Diamondback E&P LLC · Section with this well →
| Yates | 3,132 | -177 |
| Seven Rivers | 3,351 | -396 |
| Queen | 3,755 | -800 |
| Grayburg | 4,242 | -1,287 |
| San Andres | 4,703 | -1,748 |
| Glorieta | 5,766 | -2,811 |
| Clear Fork | 6,700 | -3,745 |
| Holt | — |
10 TOPS · FIRST 8
UL Lake Valley 10-19 D42-003-48590
0.4 KM · Diamondback E&P LLC · Section with this well →
| Yates | 3,136 | -182 |
| Seven Rivers | 3,352 | -398 |
| Queen | 3,753 | -799 |
| Grayburg | 4,240 | -1,286 |
| San Andres | 4,700 | -1,746 |
| Glorieta | 5,760 | -2,806 |
| Clear Fork | 6,695 | -3,741 |
| Tubb | — |
10 TOPS · FIRST 8
UL Lake Valley 10-19 G42-003-48593
0.4 KM · Diamondback E&P LLC · Section with this well →
| Yates | 3,131 | -177 |
| Seven Rivers | 3,351 | -397 |
| Queen | 3,764 | -810 |
| Grayburg | 4,239 | -1,285 |
| San Andres | 4,698 | -1,744 |
| Glorieta | 5,697 | -2,743 |
| Clear Fork | 6,722 | -3,768 |
| Permian (undifferentiated) | — |
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/00347604, documented in the API reference.