WELL · 42-495-34694 · DISTRICT 8
UL Yellowtail D 21-29-17 TB #4H
Winkler County · Phantom (Wolfcamp) field · Producing · Horizontal
UL Yellowtail D 21-29-17 TB #4H (API 42-495-34694) is a horizontal well in Winkler County operated by Apache Corporation, completed September 16, 2022 and listed as producing on the RRC schedule.
The RRC has issued one drilling permit (amended once), issued February 16, 2022, permitted to 13,500 ft.
It was permitted by Percussion Petroleum Oper II,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 lease has reported 148K barrels of oil and 157K mcf of gas since September 2022, last reporting in July 2026.
Operator of record
Permitted by Percussion Petroleum Oper Ii,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 | Percussion Petroleum Oper Ii,llcFeb 16, 2022 |
The sources disagree, which usually means a transfer or a lease-level production filing by a different entity. Petrora goes with the schedule.
- 13,500
- total depth, ft
- 2
- permits on file
- Feb 16, 2022
- last permit issued
- Sep 16, 2022
- completed
- 148K
- cumulative oil, bbl
- 157K
- cumulative gas, mcf
PRODUCTION FROM PDQ LEASE REPORTS · Sep 2022 THROUGH Jul 2026
Regulatory status · RRC wellbore file
- Schedule
- ON SCHEDULE
- Completed
- Sep 16, 2022
- Shut in
- —
- Plugged
- —
Operator's P-5 on the schedule: Active
Surface location
31.710999, -103.244139
OpenStreetMap → · Google Maps →
Permit surface location from the RRC GIS record, in Winkler 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 Yellowtail D 21-29-17 TB O-10-58183 | Phantom (Wolfcamp) | Apache Corporation | 1 | 148K | 157K | Sep 2022 – Jul 2026 |
Oil, barrels lease total
Last 12 months 20,448 · prior 12 37,100(-45%)
Gas, mcf lease total
Last 12 months 24,062 · prior 12 37,910(-37%)
Chain of custody
Every operator that reported production on this well's lease, in order.
- 1Percussion Petroleum Oper Ii,llcSep 2022 → Jul 2023
- 2Callon Permian II, LLCAug 2023 → Jul 2024
- 3Apache CorporationAug 2024 → Apr 2026
Permits
| Permit | Type | Operator | Received | Issued | Spud | Depth |
|---|---|---|---|---|---|---|
| 876937-98 | Drill | Percussion Petroleum Oper Ii,llc | Feb 28, 2022 | Feb 16, 2022 | Apr 21, 2022 | 13,500 |
| 876937-99 | Drill | Percussion Petroleum Oper Ii,llc | Feb 9, 2022 | Feb 16, 2022 | — | 13,500 |
Completions
| Completed | Lease | Field | Operator | Status | Depth |
|---|---|---|---|---|---|
| — | — O-10-58183 | — | — | — | — |
Formation tops
As filed on W-2/G-1. Subsea from 2,763 ft elevation.Download CSV →
| Formation | MD ft | Subsea |
|---|---|---|
| Delaware | 5,111 | -2,348 |
| 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 |
|---|---|---|
| 11,717 | 21,928 | Perforated |
Casing
Strings as reported, shallowest first.
| Casing in | Set at | Hole in | Cement |
|---|---|---|---|
| 10.75 | 5,081 | 12.25 | 1,685 S |
| 7.625 | 10,793 | 8.75 | 1,275 S |
| 5.5 | 22,020 | 6.75 | 935 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 | Jan 10, 2023 | Nov 17, 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 42-495-34694 → W-2, G-1, plugging reports, as PDFs
- Completion packets for 42-495-34694 → 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 Yellowtail West E 21-29-17 WB42-495-34695
0.0 KM · Percussion Petroleum Oper Ii,llc · Section with this well →
| Delaware | 5,109 | -2,346 |
| Yates | — | |
| Seven Rivers | — | |
| San Andres | — | |
| Rustler | — | |
| Holt | — | |
| Glorieta | — | |
| Colby / Queen | — |
10 TOPS · FIRST 8
UL Yellowtail West G 21-29-17 WA42-495-34697
0.0 KM · Percussion Petroleum Oper Ii,llc · Section with this well →
| Delaware | 5,101 | -2,337 |
| Glorieta | — | |
| Holt | — | |
| Rustler | — | |
| San Andres | — | |
| Seven Rivers | — | |
| Yates | — | |
| Capitan | — |
10 TOPS · FIRST 8
UL Yellowtail West H 21-29-17 WB42-495-34698
0.0 KM · Percussion Petroleum Oper Ii,llc · Section with this well →
| Delaware | 5,111 | -2,348 |
| Bone Spring | 10,069 | -7,306 |
| Bone Spring | 10,820 | -8,057 |
| Glorieta | — | |
| Capitan | — | |
| Colby / Queen | — | |
| Rustler | — | |
| San Andres | — |
10 TOPS · FIRST 8
UL 21 Yellowtail42-495-33769
0.4 KM · Percussion Petroleum Oper Ii,llc · Section with this well →
| Rustler | 707 | 2,057 |
| Yates | 3,200 | -436 |
| Colby-Queen | 3,200 | -436 |
| Queen | 3,400 | -636 |
| San Andres | 4,400 | -1,636 |
| Holt | 4,800 | -2,036 |
| Delaware | 5,000 | -2,236 |
| Glorieta | 5,600 | -2,836 |
10 TOPS · FIRST 8
UL Yellowtail I 21-29-17 WA42-495-34699
0.7 KM · Percussion Petroleum Oper Ii,llc · Section with this well →
| Delaware | 5,116 | -2,349 |
| Capitan | — | |
| Clear Fork | — | |
| Colby / Queen | — | |
| Glorieta | — | |
| Holt | — | |
| Rustler | — | |
| San Andres | — |
10 TOPS · FIRST 8
UL Yellowtail J 21-29-17 TB42-495-34700
0.7 KM · Percussion Petroleum Oper Ii,llc · Section with this well →
| Delaware | 5,114 | -2,346 |
| Bone Spring | 10,067 | -7,299 |
| Bone Spring | 10,825 | -8,057 |
| Capitan | — | |
| San Andres | — | |
| Seven Rivers | — | |
| Yates | — | |
| Rustler | — |
10 TOPS · FIRST 8
UL Yellowtail K 21-29-17 WB42-495-34701
0.7 KM · Percussion Petroleum Oper Ii,llc · Section with this well →
| Delaware | 5,114 | -2,347 |
| Bone Spring | 10,066 | -7,299 |
| Bone Spring | 10,782 | -8,015 |
| Glorieta | — | |
| Capitan | — | |
| Colby / Queen | — | |
| Rustler | — | |
| San Andres | — |
10 TOPS · FIRST 8
UL Yellowtail L 21-29-17 TB42-495-34702
0.7 KM · Percussion Petroleum Oper Ii,llc · Section with this well →
| Delaware | 5,125 | -2,358 |
| Clear Fork | — | |
| Colby / Queen | — | |
| Glorieta | — | |
| Holt | — | |
| Rustler | — | |
| San Andres | — | |
| Seven Rivers | — |
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/49534694, documented in the API reference.