WELL · 42-495-34620 · DISTRICT 8
UL 20 Flathead #A004H
Winkler County · Phantom (Wolfcamp) field · Horizontal
UL 20 Flathead #A004H (API 42-495-34620) is a horizontal well in Winkler County operated by Apache Corporation, completed February 1, 2022.
The RRC has issued one drilling permit, issued July 22, 2021, permitted to 12,151 ft.
It was permitted by Oasis Petroleum Permian LLC and has since transferred to Apache Corporation on the wellbore schedule.
Completion filings report 10 formation tops, including Delaware, Capitan, Clear Fork, Colby / Queen.
Its 2 leases have reported 439K barrels of oil and 738K mcf of gas since December 2016, last reporting in July 2026. The leases carry 5 wells, so these are lease totals, not this well alone.
Operator of record
Permitted by Oasis Petroleum Permian LLC; the EWA schedule now lists a different operator.
Houston, TX · P-5 Y, filed Oct 4, 2025 · 9,754 permits on file · (713) 296-6400
SOURCE · RRC EWA WELLBORE SCHEDULE
What each RRC source says
| Wellbore schedule | Apache Corporation |
| Production reports | Apache Corporationthrough Apr 2026 |
| Latest permit | Oasis Petroleum Permian LLCJul 22, 2021 |
The sources disagree, which usually means a transfer or a lease-level production filing by a different entity. Petrora goes with the schedule.
- 12,151
- total depth, ft
- 1
- permits on file
- Jul 22, 2021
- last permit issued
- Feb 1, 2022
- completed
- 439K
- cumulative oil, bbl
- 738K
- cumulative gas, mcf
PRODUCTION FROM PDQ LEASE REPORTS · Dec 2016 THROUGH Jul 2026
Regulatory status · RRC wellbore file
- Schedule
- OFF SCHEDULE
- Completed
- Feb 1, 2022
- Shut in
- —
- Plugged
- —
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 2 leases this well is completed on; they carry 5 wells in total, so volumes are shared.Why →
| Lease | Field | Reporting operator | Wells | Oil, bbl | Gas, mcf | Reported |
|---|---|---|---|---|---|---|
| UL 20 Flathead G-10-300113 | Phantom (Wolfcamp) | Apache Corporation | 1 | 0 | 51.5K | Feb 2022 – Jul 2026 |
| UL 20 Flathead O-10-48623 | Phantom (Wolfcamp) | Apache Corporation | 4 | 439K | 687K | Dec 2016 – Jul 2026 |
Oil, barrels lease total
Last 12 months 35,749 · prior 12 12,368(+189%)
Gas, mcf lease total
Last 12 months 51,170 · prior 12 32,532(+57%)
Chain of custody
Every operator that reported production on this well's lease, in order.
- 1Forge Energy, LLCJun 2017 → Jan 2018
- 2Oasis Petroleum Permian LLCFeb 2018 → Feb 2021
- 3Percussion Petroleum Oper Ii,llcMar 2021 → Jul 2023
- 4Apache CorporationFeb 2022 → Apr 2026
- 5Callon Permian II, LLCAug 2023 → Jul 2024
Permits
| Permit | Type | Operator | Received | Issued | Spud | Depth |
|---|---|---|---|---|---|---|
| 871031-99 | Drill | Oasis Petroleum Permian LLC | Jul 7, 2021 | Jul 22, 2021 | Aug 20, 2021 | 12,151 |
Completions
| Completed | Lease | Field | Operator | Status | Depth |
|---|---|---|---|---|---|
| — | — G-10-300113 | — | — | — | — |
| — | — O-10-48623 | — | — | — | — |
Formation tops
As filed on W-2/G-1. Subsea from 2,779 ft elevation.Download CSV →
| Formation | MD ft | Subsea |
|---|---|---|
| Delaware | 5,083 | -2,304 |
| CapitanCAPITAN REEF - HIGH FLOWS | — | — |
| Clear ForkCLEARFORK | — | — |
| Colby / Queen | — | — |
| Glorieta | — | — |
| Holt | — | — |
| RustlerRUSTLER - POSSIBLE FLOW; POSSIBL | — | — |
| San AndresSAN ANDRES - HIGH FLOWS, H2S, CO | — | — |
| Seven RiversSEVEN RIVERS / QUEEN | — | — |
| Yates | — | — |
Perforations
Perforated and open-hole intervals.
| From | To | Type |
|---|---|---|
| 12,215 | 17,274 | Perforated |
Casing
Strings as reported, shallowest first.
| Casing in | Set at | Hole in | Cement |
|---|---|---|---|
| 10.75 | 5,080 | 12.25 | 1,560 S |
| 7.625 | 11,145 | 9.875 | 535 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 | Oct 16, 2025 | Aug 18, 2025 | — |
| 00 | Aug 30, 2022 | Jun 2, 2022 | 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 42-495-34620 → W-2, G-1, plugging reports, as PDFs
- Completion packets for 42-495-34620 → 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/49534620, documented in the API reference.