WELL · 42-003-47817 · DISTRICT 8
UL Mason East B #14LS
Andrews County · Spraberry (Trend Area) field · Producing · Horizontal
UL Mason East B #14LS (API 42-003-47817) is a horizontal well in Andrews County operated by Diamondback E&P LLC, completed January 23, 2021 and listed as producing on the RRC schedule.
The RRC has issued one drilling permit, issued June 6, 2018, permitted to 9,518 ft.
Completion filings report 10 formation tops, including Yates, Seven Rivers, Grayburg, San Andres.
Its lease has reported 395K barrels of oil and 386K mcf of gas since February 2019, last reporting in July 2026.
Operator of record
- 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 | Diamondback E&P LLCJun 6, 2018 |
- 9,518
- total depth, ft
- 1
- permits on file
- Jun 6, 2018
- last permit issued
- Jan 23, 2021
- completed
- 395K
- cumulative oil, bbl
- 386K
- cumulative gas, mcf
PRODUCTION FROM PDQ LEASE REPORTS · Feb 2019 THROUGH Jul 2026
Regulatory status · RRC wellbore file
- Schedule
- ON SCHEDULE
- Completed
- Jan 23, 2021
- Shut in
- —
- Plugged
- —
Operator's P-5 on the schedule: Active (A)
Surface location
32.445158, -102.227347
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; this well is the only one on it.Why →
| Lease | Field | Reporting operator | Wells | Oil, bbl | Gas, mcf | Reported |
|---|---|---|---|---|---|---|
| UL Mason East B O-10-52101 | Spraberry (Trend Area) | Diamondback E&P LLC | 1 | 395K | 386K | Feb 2019 – Jul 2026 |
Oil, barrels lease total
Last 12 months 17,127 · prior 12 16,113(+6%)
Gas, mcf lease total
Last 12 months 19,895 · prior 12 17,342(+15%)
Chain of custody
Every operator that reported production on this well's lease, in order.
- 1Diamondback E&P LLCFeb 2019 → Apr 2026
Permits
| Permit | Type | Operator | Received | Issued | Spud | Depth |
|---|---|---|---|---|---|---|
| 839862-99 | Drill | Diamondback E&P LLC | May 9, 2018 | Jun 6, 2018 | Aug 30, 2018 | 10,412 |
Completions
| Completed | Lease | Field | Operator | Status | Depth |
|---|---|---|---|---|---|
| Jan 23, 2021 | UL Mason East B O-10-52101 | Spraberry (Trend Area) | Diamondback E&P LLC | Producing | 9,518 |
Formation tops
As filed on W-2/G-1. Subsea from 2,957 ft elevation.Download CSV →
| Formation | MD ft | Subsea |
|---|---|---|
| Yates | 3,083 | -126 |
| Seven Rivers | 3,315 | -358 |
| Grayburg | 4,178 | -1,221 |
| San AndresSAN ANDRES - CO2 FLOOD, HIGH FLO | 4,625 | -1,668 |
| Holt | 5,290 | -2,333 |
| Glorieta | 5,402 | -2,445 |
| Clear ForkCLEARFORK | 6,587 | -3,630 |
| Permian (undifferentiated)PERMIAN DETRITAL | — | — |
| Queen | — | — |
| Tubb | — | — |
Perforations
Perforated and open-hole intervals.
| From | To | Type |
|---|---|---|
| 10,013 | 17,678 | Perforated |
Casing
Strings as reported, shallowest first.
| Casing in | Set at | Hole in | Cement |
|---|---|---|---|
| 13.375 | 1,875 | 17.5 | 2,870 S |
| 9.625 | 7,018 | 12.25 | 1,943 S |
| 5.5 | 17,780 | 8.5 | 2,705 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 | Apr 16, 2021 | Apr 7, 2021 | Yes |
| 00 | Sep 17, 2019 | May 23, 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 42-003-47817 → W-2, G-1, plugging reports, as PDFs
- Completion packets for 42-003-47817 → 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.
UL Mason East C42-003-47815
0.0 KM · Diamondback E&P LLC · Section with this well →
| Yates | 3,086 | -129 |
| Seven Rivers | 3,314 | -357 |
| Grayburg | 4,180 | -1,223 |
| San Andres | 4,623 | -1,666 |
| Holt | 5,318 | -2,361 |
| Glorieta | 5,415 | -2,458 |
| Clear Fork | 6,591 | -3,634 |
| Tubb | — |
10 TOPS · FIRST 8
UL Mason East A42-003-47814
0.0 KM · Diamondback E&P LLC · Section with this well →
| Yates | 3,079 | -122 |
| Seven Rivers | 3,305 | -348 |
| Grayburg | 4,172 | -1,215 |
| San Andres | 4,611 | -1,654 |
| Holt | 5,304 | -2,347 |
| Glorieta | 5,404 | -2,447 |
| Clear Fork | 6,584 | -3,627 |
| Tubb | — |
13 TOPS · FIRST 8
UL Mason East Unit42-003-47818
0.0 KM · Diamondback E&P LLC · Section with this well →
| Yates | 3,085 | -129 |
| Seven Rivers | 3,306 | -350 |
| Grayburg | 4,181 | -1,225 |
| San Andres | 4,620 | -1,664 |
| Holt | 5,319 | -2,363 |
| Glorieta | 5,414 | -2,458 |
| Clear Fork | 6,604 | -3,648 |
| Queen | — |
10 TOPS · FIRST 8
UL Monty East 46-32 F42-003-49211
0.8 KM · Diamondback E&P LLC · Section with this well →
| Yates | 3,073 | -121 |
| Grayburg | 4,153 | -1,201 |
| Clear Fork | 6,549 | -3,597 |
| Tubb | — | |
| Glorieta | — | |
| Holt | — | |
| Permian (undifferentiated) | — | |
| Queen | — |
10 TOPS · FIRST 8
UL Monty East 46-32 G42-003-49209
0.8 KM · Diamondback E&P LLC · Section with this well →
| Yates | 3,073 | -121 |
| Grayburg | 4,150 | -1,198 |
| Clear Fork | 6,551 | -3,599 |
| Holt | — | |
| Glorieta | — | |
| Permian (undifferentiated) | — | |
| Queen | — | |
| San Andres | — |
10 TOPS · FIRST 8
UL Monty East 46-32 H42-003-49216
0.8 KM · Diamondback E&P LLC · Section with this well →
| Rustler | 2,114 | 838 |
| Yates | 3,074 | -122 |
| Grayburg | 4,155 | -1,203 |
| San Andres | 4,614 | -1,662 |
| Clear Fork | 6,549 | -3,597 |
| Glorieta | — | |
| Queen | — | |
| Tubb | — |
10 TOPS · FIRST 8
UL Monty East 46-32 E42-003-49213
0.8 KM · Diamondback E&P LLC · Section with this well →
| Yates | 3,077 | -125 |
| Grayburg | 4,162 | -1,210 |
| San Andres | 4,625 | -1,673 |
| Clear Fork | 6,561 | -3,609 |
| Seven Rivers | — | |
| Queen | — | |
| Permian (undifferentiated) | — | |
| Holt | — |
10 TOPS · FIRST 8
UL Monty East 46-32 C42-003-49214
0.8 KM · Diamondback E&P LLC · Section with this well →
| Rustler | 2,138 | 814 |
| Yates | 3,077 | -125 |
| Grayburg | 4,163 | -1,211 |
| San Andres | 4,626 | -1,674 |
| Clear Fork | 6,568 | -3,616 |
| Glorieta | — | |
| Seven Rivers | — | |
| Tubb | — |
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/00347817, documented in the API reference.