TEXAS · WELLS · MARTIN COUNTY · UL MUSTANG 13 LEASE · API 42-317-40527 · DISTRICT 7B
UL Mustang 13 #233
Martin County · Spraberry (Trend Area) field · Producing · Horizontal
UL Mustang 13 #233 (API 42-317-40527) is a horizontal well in Martin County operated by Diamondback E&P LLC, completed April 15, 2017 and listed as producing on the RRC schedule.
The RRC has issued one drilling permit, issued August 17, 2016, permitted to 8,774 ft.
It was permitted by Exl Petroleum Operating Inc. and has since transferred to Diamondback E&P LLC on the wellbore schedule.
Completion filings report 10 formation tops, including Spraberry, Dean, Wolfcamp, Cisco.
Its lease has reported 966K barrels of oil and 1.54M mcf of gas since May 2016, last reporting in July 2026. The lease carries 4 wells, so these are lease totals, not this well alone.
Operator of record
Permitted by EXL Petroleum Operating Inc.; 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
- 5,243
- 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 | EXL Petroleum Operating Inc.Aug 17, 2016 |
The sources disagree, which usually means a transfer or a lease-level production filing by a different entity. Petrora goes with the schedule.
- 8,774
- total depth, ft
- 1
- permits on file
- Aug 17, 2016
- last permit issued
- Apr 15, 2017
- completed
- 966K
- cumulative oil, bbl
- 1.54M
- cumulative gas, mcf
PRODUCTION FROM PDQ LEASE REPORTS · May 2016 THROUGH Jul 2026
Regulatory status · RRC wellbore file
- Schedule
- ON SCHEDULE
- Completed
- Apr 15, 2017
- Shut in
- —
- Plugged
- —
Operator's P-5 on the schedule: Active (A)
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 lease this well is completed on; they carry 4 wells in total, so volumes are shared.Why →
| Lease | Field | Reporting operator | Wells | Oil, bbl | Gas, mcf | Reported |
|---|---|---|---|---|---|---|
| UL Mustang 13 O-10-48320 | Spraberry (Trend Area) | Diamondback E&P LLC | 4 | 966K | 1.54M | May 2016 – Jul 2026 |
Oil, barrels lease total
Last 12 months 34,151 · prior 12 51,077(-33%)
Gas, mcf lease total
Last 12 months 120,677 · prior 12 187,179(-36%)
Chain of custody
Every operator that reported production on this well's lease, in order.
- 1EXL Petroleum Operating Inc.May 2016 → Oct 2018
- 2Diamondback E&P LLCNov 2018 → Apr 2026
Permits
| Permit | Type | Operator | Received | Issued | Spud | Depth |
|---|---|---|---|---|---|---|
| 817774-99 | Drill | EXL Petroleum Operating Inc. | Aug 16, 2016 | Aug 17, 2016 | Oct 29, 2016 | 11,000 |
Completions
| Completed | Lease | Field | Operator | Status | Depth |
|---|---|---|---|---|---|
| Apr 15, 2017 | UL Mustang 13 O-10-48320 | Spraberry (Trend Area) | Diamondback E&P LLC | Producing | 8,774 |
Formation tops
As filed on W-2/G-1. Subsea from 2,905 ft elevation.Download CSV →
| Formation | MD ft | Subsea |
|---|---|---|
| Spraberry | 9,131 | -6,226 |
| Dean | 9,486 | -6,581 |
| Wolfcamp | 9,852 | -6,947 |
| Cisco | — | — |
| Grayburg | — | — |
| Pennsylvanian | — | — |
| Queen | — | — |
| San AndresSAN ANDRES - ACTIVE CO2 FLOOD; H | — | — |
| Santa Rosa | — | — |
| Yates | — | — |
Perforations
Perforated and open-hole intervals.
| From | To | Type |
|---|---|---|
| 9,176 | 14,230 | Perforated |
Casing
Strings as reported, shallowest first.
| Casing in | Set at | Hole in | Cement |
|---|---|---|---|
| 13.375 | 422 | 17.5 | 415 S |
| 9.625 | 8,000 | 12.25 | 665 S |
| 5.5 | 14,292 | 8.75 | 2,015 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 | Nov 14, 2017 | Jun 29, 2017 | 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 42-317-40527 → W-2, G-1, plugging reports, as PDFs
- Completion packets for 42-317-40527 → 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/31740527, documented in the API reference.