TEXAS · WELLS · WINKLER COUNTY · UL ELK PARK 21-21 LEASE · API 42-495-33770 · DISTRICT 7B
UL Elk Park 21-21 #1H
Winkler County · Phantom (Wolfcamp) field · Producing · Horizontal
UL Elk Park 21-21 #1H (API 42-495-33770) is a horizontal well in Winkler County operated by Wpx Energy Permian LLC, completed March 9, 2017 and listed as producing on the RRC schedule.
The RRC has issued one drilling permit (amended once), issued December 6, 2016, permitted to 12,020 ft.
It was permitted by Felix Energy Holdings II, LLC and has since transferred to Wpx Energy Permian LLC on the wellbore schedule.
Completion filings report 10 formation tops, including Rustler, Delaware, Clear Fork, Colby-Queen.
Its lease has reported 289K barrels of oil and 346K mcf of gas since March 2017, last reporting volume in September 2025.
Operator of record
Permitted by Felix Energy Holdings II, LLC; the EWA schedule now lists a different operator.
- Based in
- Oklahoma City, OK
- P-5 status
- Active (A)
- P-5 last filed
- Oct 22, 2025
- Permits on file
- 956
- Phone
- (405) 235-3611
SOURCE · RRC EWA WELLBORE SCHEDULE
What each RRC source says
| Wellbore schedule | WPX Energy Permian LLC |
| Production reports | WPX Energy Permian, LLCthrough Sep 2025 |
| Latest permit | Felix Energy Holdings II, LLCDec 6, 2016 |
The sources disagree, which usually means a transfer or a lease-level production filing by a different entity. Petrora goes with the schedule.
- 12,020
- total depth, ft
- 2
- permits on file
- Dec 6, 2016
- last permit issued
- Mar 9, 2017
- completed
- 289K
- cumulative oil, bbl
- 346K
- cumulative gas, mcf
PRODUCTION FROM PDQ LEASE REPORTS · Mar 2017 THROUGH Sep 2025
Regulatory status · RRC wellbore file
- Schedule
- ON SCHEDULE
- Completed
- Mar 9, 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; this well is the only one on it.Why →
| Lease | Field | Reporting operator | Wells | Oil, bbl | Gas, mcf | Reported |
|---|---|---|---|---|---|---|
| UL Elk Park 21-21 O-10-48860 | Phantom (Wolfcamp) | WPX Energy Permian, LLC | 1 | 289K | 346K | Mar 2017 – Sep 2025 |
Oil, barrels lease total
Last 12 months 24 · prior 12 2,670(-99%)
Gas, mcf lease total
Last 12 months 22 · prior 12 35(-37%)
Chain of custody
Every operator that reported production on this well's lease, in order.
- 1Felix Energy Holdings II, LLCMar 2017 → Apr 2020
- 2WPX Energy Permian, LLCMay 2020 → Sep 2025
Permits
| Permit | Type | Operator | Received | Issued | Spud | Depth |
|---|---|---|---|---|---|---|
| 820660-98 | Drill | Felix Energy Holdings II, LLC | Jan 4, 2017 | Dec 6, 2016 | Dec 22, 2016 | 14,000 |
| 820660-99 | Drill | Felix Energy Holdings II, LLC | Nov 23, 2016 | Dec 6, 2016 | Dec 22, 2016 | 14,000 |
Completions
| Completed | Lease | Field | Operator | Status | Depth |
|---|---|---|---|---|---|
| Mar 9, 2017 | UL Elk Park 21-21 O-10-48860 | Phantom (Wolfcamp) | WPX Energy Permian LLC | Producing | 12,020 |
Formation tops
As filed on W-2/G-1. Subsea from 2,304 ft elevation.Download CSV →
| Formation | MD ft | Subsea |
|---|---|---|
| RustlerRUSTLER - POSSIBLE FLOW; POSSIBL | 843 | 1,461 |
| Delaware | 5,121 | -2,817 |
| Clear ForkCLEARFORK | — | — |
| Colby-Queen | — | — |
| Glorieta | — | — |
| Holt | — | — |
| QueenQUEEN-SEVEN RIVERS | — | — |
| San AndresSAN ANDRES - HIGH FLOWS, H2S, CO | — | — |
| Wichita-AlbanyWICHITA ALBANY | — | — |
| Yates | — | — |
Perforations
Perforated and open-hole intervals.
| From | To | Type |
|---|---|---|
| 11,738 | 16,812 | Perforated |
| 12,246 | 16,802 | Perforated |
Casing
Strings as reported, shallowest first.
| Casing in | Set at | Hole in | Cement |
|---|---|---|---|
| 13.375 | 1,064 | 17.5 | 1,257 S |
| 10.75 | 5,161 | 12.25 | 1,192 S |
| 7.625 | 11,475 | 9.875 | 903 S |
| 5.5 | 16,963 | 6.75 | 990 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. The record date is the RRC's own date on the record, not the day the report was filed: 462,034 of the state's filings carry 1984-01-12. About these reports →
| Suffix | RRC record date | W-2 / G-1 date | Logs referenced |
|---|---|---|---|
| 00 | Aug 1, 2019 | Jan 2, 2019 | Yes |
| 00 | Mar 21, 2018 | Feb 5, 2018 | — |
| 00 | Nov 28, 2017 | Jun 26, 2017 | Yes |
Well logs
1 log loaded from the RRC's log index, 1 of it with a digital LAS file, the latest received Sep 22, 2021. Mud log. These are the logs loaded into Petrora from the Railroad Commission's inventories, not necessarily every log run on the well. The RRC holds the files; each opens from its log search for the well. The kind is the RRC's description of the log; the interval is the one filed for it.
Open the RRC's log search for this well ↗| Logas described | Files | Intervalft, as filed | Datereceived | SizeMB |
|---|---|---|---|---|
| MudSpans Rustler, Delaware | LAS + TIFF | 4,428 to 16,963 | Sep 22, 2021 | 0.56 + 20.6 |
"Spans" is by this well's own filed formation tops: a formation runs from its top to the next deeper top filed, and the deepest runs to the bottom of the log. Depths are measured along the wellbore, so on a horizontal the lateral counts in the formation it was landed in.
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 42-495-33770 → W-2, G-1, plugging reports, as PDFs
- Completion packets for 42-495-33770 → scanned completion filings
The logs loaded for this well are under Well logs, with the RRC's log search for it. The University Lands library has no per-well link: then paste it into its 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/49533770, documented in the API reference.