WELL · 42-329-40568 · DISTRICT 8
Willow Lakes 34 SL #391HS
Midland County · Spraberry (Trend Area) field · Producing · Horizontal
Willow Lakes 34 SL #391HS (API 42-329-40568) is a horizontal well in Midland County operated by Diamondback E&P LLC, completed February 12, 2016 and listed as producing on the RRC schedule.
The RRC has issued one drilling permit (amended once), issued October 20, 2015, permitted to 10,500 ft.
It was permitted by Trail Ridge Energy Prtns II LLC and has since transferred to Diamondback E&P LLC on the wellbore schedule.
Completion filings report 9 formation tops, including Santa Rosa, Yates, Seven Rivers, Queen.
Its lease has reported 556K barrels of oil and 694K mcf of gas since February 2016, last reporting in July 2026. The lease carries 2 wells, so these are lease totals, not this well alone.
Operator of record
Permitted by Trail Ridge Energy Prtns II LLC; the EWA schedule now lists a different operator.
Midland, TX · P-5 Y, filed Mar 4, 2026 · 5,237 permits on file · (855) 247-5920
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 | Trail Ridge Energy Prtns II LLCOct 20, 2015 |
The sources disagree, which usually means a transfer or a lease-level production filing by a different entity. Petrora goes with the schedule.
- 10,500
- total depth, ft
- 2
- permits on file
- Oct 20, 2015
- last permit issued
- Feb 12, 2016
- completed
- 556K
- cumulative oil, bbl
- 694K
- cumulative gas, mcf
PRODUCTION FROM PDQ LEASE REPORTS · Feb 2016 THROUGH Jul 2026
Regulatory status · RRC wellbore file
- Schedule
- ON SCHEDULE
- Completed
- Feb 12, 2016
- Shut in
- —
- Plugged
- —
Operator's P-5 on the schedule: X
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 2 wells in total, so volumes are shared.Why →
| Lease | Field | Reporting operator | Wells | Oil, bbl | Gas, mcf | Reported |
|---|---|---|---|---|---|---|
| Willow Lakes 34 SL O-10-48297 | Spraberry (Trend Area) | Diamondback E&P LLC | 2 | 556K | 694K | Feb 2016 – Jul 2026 |
Oil, barrels lease total
Last 12 months 30,172 · prior 12 10,708(+182%)
Gas, mcf lease total
Last 12 months 72,737 · prior 12 3,616(+1912%)
Chain of custody
Every operator that reported production on this well's lease, in order.
- 1Trail Ridge Energy Prtns II LLCFeb 2016 → Feb 2017
- 2Lario Oil & Gas CompanyMar 2017 → Jan 2023
- 3Diamondback E&P LLCMar 2023 → Apr 2026
Permits
| Permit | Type | Operator | Received | Issued | Spud | Depth |
|---|---|---|---|---|---|---|
| 811238-98 | Drill | Trail Ridge Energy Prtns II LLC | Oct 4, 2016 | Oct 20, 2015 | Nov 5, 2015 | 10,500 |
| 811238-99 | Drill | Trail Ridge Energy Prtns II LLC | Oct 15, 2015 | Oct 20, 2015 | Nov 5, 2015 | 10,500 |
Completions
| Completed | Lease | Field | Operator | Status | Depth |
|---|---|---|---|---|---|
| — | — O-10-48297 | — | — | — | — |
Formation tops
As filed on W-2/G-1. Subsea from 2,802 ft elevation.Download CSV →
| Formation | MD ft | Subsea |
|---|---|---|
| Santa Rosa | 838 | 1,964 |
| Yates | 2,667 | 135 |
| Seven Rivers | 2,964 | -162 |
| Queen | 3,741 | -939 |
| Grayburg | 4,046 | -1,244 |
| San AndresSAN ANDRES - HIGH FLOWS, H2S, CO | 4,202 | -1,400 |
| Glorieta | 4,250 | -1,448 |
| Clear ForkCLEARFORK | 5,465 | -2,663 |
| Spraberry | 7,649 | -4,847 |
| SpraberrySPRABERRY UPPER-DEAN | 8,542 | -5,740 |
Perforations
Perforated and open-hole intervals.
| From | To | Type |
|---|---|---|
| 9,820 | 14,958 | Perforated |
Casing
Strings as reported, shallowest first.
| Casing in | Set at | Hole in | Cement |
|---|---|---|---|
| 13.375 | 513 | 17.5 | 500 S |
| 9.625 | 5,615 | 12.25 | 700 S |
| 5.5 | 15,008 | 8.5 | 2,385 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 | Sep 4, 2025 | Aug 20, 2025 | — |
| 00 | Mar 17, 2017 | Jan 5, 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 42-329-40568 → W-2, G-1, plugging reports, as PDFs
- Completion packets for 42-329-40568 → scanned completion filings
Log images are in archives with no per-well link: the RRC's Neubus archive (2004 onward). 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/32940568, documented in the API reference.