WELL · 42-317-40208 · DISTRICT 8
East Willow Lakes #291H
Martin County · Spraberry (Trend Area) R 40 Exc field · Producing · Horizontal
East Willow Lakes #291H (API 42-317-40208) is a horizontal well in Martin County operated by Diamondback E&P LLC, completed July 13, 2015 and listed as producing on the RRC schedule.
The RRC has issued one drilling permit (amended twice), issued June 12, 2015, permitted to 9,200 ft.
It was permitted by Lario Oil & Gas Company and has since transferred to Diamondback E&P LLC on the wellbore schedule.
Completion filings report 10 formation tops, including Santa Rosa, Yates, Queen, Grayburg.
Its lease has reported 463K barrels of oil and 1.04M mcf of gas since July 2015, last reporting in July 2026.
Operator of record
Permitted by Lario Oil & Gas Company; the EWA schedule now lists a different operator.
Midland, TX · P-5 Y, filed Mar 4, 2026 · 5,231 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 | Lario Oil & Gas CompanyJun 12, 2015 |
The sources disagree, which usually means a transfer or a lease-level production filing by a different entity. Petrora goes with the schedule.
- 9,200
- total depth, ft
- 3
- permits on file
- Jun 12, 2015
- last permit issued
- Jul 13, 2015
- completed
- 463K
- cumulative oil, bbl
- 1.04M
- cumulative gas, mcf
PRODUCTION FROM PDQ LEASE REPORTS · Jul 2015 THROUGH Jul 2026
Regulatory status · RRC wellbore file
- Schedule
- ON SCHEDULE
- Completed
- Jul 13, 2015
- Shut in
- —
- Plugged
- —
Operator's P-5 on the schedule: X
Surface location
32.100487, -101.842414
OpenStreetMap → · Google Maps →
Permit surface location from the RRC GIS record, in Martin 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 |
|---|---|---|---|---|---|---|
| East Willow Lakes O-10-47253 | Spraberry (Trend Area) R 40 Exc | Diamondback E&P LLC | 1 | 463K | 1.04M | Jul 2015 – Jul 2026 |
Gas, mcf lease total
Last 12 months 114,233 · prior 12 131,342(-13%)
Oil, barrels lease total
Last 12 months 11,222 · prior 12 12,762(-12%)
Chain of custody
Every operator that reported production on this well's lease, in order.
- 1Trail Ridge Energy Prtns II LLCAug 2015 → Feb 2017
- 2Lario Oil & Gas CompanyMar 2017 → Feb 2023
- 3Diamondback E&P LLCMar 2023 → Apr 2026
Permits
| Permit | Type | Operator | Received | Issued | Spud | Depth |
|---|---|---|---|---|---|---|
| 807132-97 | Drill | Lario Oil & Gas Company | Oct 8, 2020 | Jun 12, 2015 | Jun 13, 2015 | 9,200 |
| 807132-98 | Drill | Trail Ridge Energy Prtns II LLC | Feb 4, 2016 | Jun 12, 2015 | Jun 13, 2015 | 9,200 |
| 807132-99 | Drill | Trail Ridge Energy Prtns II LLC | Jun 2, 2015 | Jun 12, 2015 | Jun 13, 2015 | 9,200 |
Completions
| Completed | Lease | Field | Operator | Status | Depth |
|---|---|---|---|---|---|
| — | — O-10-47253 | — | — | — | — |
Formation tops
As filed on W-2/G-1. Subsea from 2,693 ft elevation.Download CSV →
| Formation | MD ft | Subsea |
|---|---|---|
| Santa Rosa | 950 | 1,743 |
| Yates | 2,306 | 387 |
| Queen | 3,221 | -528 |
| Grayburg | 3,962 | -1,269 |
| San AndresSAN ANDRES - ACTIVE CO2 FLOOD; H | 4,150 | -1,457 |
| Spraberry | 7,145 | -4,452 |
| Dean | 8,500 | -5,807 |
| Wolfcamp | 8,697 | -6,004 |
| Cisco | — | — |
| Pennsylvanian | — | — |
Perforations
Perforated and open-hole intervals.
| From | To | Type |
|---|---|---|
| 9,318 | 17,586 | Perforated |
Casing
Strings as reported, shallowest first.
| Casing in | Set at | Hole in | Cement |
|---|---|---|---|
| 13.375 | 425 | 17.5 | 550 S |
| 9.625 | 5,101 | 12.25 | 600 S |
| 9.625 | 8,500 | 12.25 | 1,445 S |
| 5.5 | 17,686 | 8.5 | 3,020 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 | Dec 29, 2020 | Oct 7, 2020 | — |
| 00 | Feb 11, 2016 | Dec 18, 2015 | 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 42-317-40208 → W-2, G-1, plugging reports, as PDFs
- Completion packets for 42-317-40208 → 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.
Greene 242-317-40690
0.1 KM · Trail Ridge Energy Prtns II LLC · Section with this well →
| Santa Rosa | 904 | 1,789 |
| Yates | 2,339 | 354 |
| Queen | 3,310 | -617 |
| Grayburg | 3,928 | -1,235 |
| San Andres | 4,099 | -1,406 |
| Spraberry | 7,163 | -4,470 |
| Dean | 8,478 | -5,785 |
| Wolfcamp | 8,692 | -5,999 |
10 TOPS · FIRST 8
Greene 342-317-41010
0.2 KM · Lario Oil & Gas Company · Section with this well →
| Santa Rosa | 904 | 1,787 |
| Yates | 2,367 | 324 |
| Queen | 3,312 | -621 |
| Grayburg | 3,946 | -1,255 |
| San Andres | 4,087 | -1,396 |
| Spraberry | 7,224 | -4,533 |
| Dean | 8,494 | -5,803 |
| Wolfcamp | 8,707 | -6,016 |
10 TOPS · FIRST 8
Greene42-317-40921
0.2 KM · Lario Oil & Gas Company · Section with this well →
| Santa Rosa | 902 | 1,789 |
| Yates | 2,355 | 336 |
| Queen | 3,311 | -620 |
| Grayburg | 3,952 | -1,261 |
| San Andres | 4,088 | -1,397 |
| Spraberry | 7,182 | -4,491 |
| Dean | 8,503 | -5,812 |
| Wolfcamp | 8,705 | -6,014 |
10 TOPS · FIRST 8
White '20'42-317-40063
0.4 KM · Petroplex Energy Inc. · Section with this well →
| Santa Rosa | 1,000 | 1,709 |
| Yates | 2,325 | 384 |
| Queen | 4,100 | -1,391 |
| Grayburg | 4,300 | -1,591 |
| San Andres | 4,675 | -1,966 |
| Cisco | 4,700 | -1,991 |
| Spraberry | 7,173 | -4,464 |
| Dean | 8,525 | -5,816 |
10 TOPS · FIRST 8
Lafayette 342-317-44050
1.0 KM · Lario Oil & Gas Company · Section with this well →
| Santa Rosa | 1,767 | 915 |
| Yates | 2,345 | 337 |
| Queen | 3,331 | -649 |
| Grayburg | 3,937 | -1,255 |
| San Andres | 4,128 | -1,446 |
| Spraberry | 7,078 | -4,396 |
Lafayette 542-317-44048
1.0 KM · Lario Oil & Gas Company · Section with this well →
| Santa Rosa | 987 | 1,695 |
| Yates | 2,343 | 339 |
| Queen | 3,324 | -642 |
| Grayburg | 3,875 | -1,193 |
| San Andres | 4,139 | -1,457 |
| Clear Fork | 6,314 | -3,632 |
| Spraberry | 7,088 | -4,406 |
| Dean | 8,458 | -5,776 |
11 TOPS · FIRST 8
Lafayette 242-317-44046
1.0 KM · Lario Oil & Gas Company · Section with this well →
| Santa Rosa | 987 | 1,695 |
| Yates | 2,343 | 339 |
| Queen | 3,332 | -650 |
| Grayburg | 3,895 | -1,213 |
| San Andres | 4,132 | -1,450 |
| Clear Fork | 6,243 | -3,561 |
| Spraberry | 7,069 | -4,387 |
| Dean | 8,441 | -5,759 |
10 TOPS · FIRST 8
Lafayette 442-317-43444
1.0 KM · Lario Oil & Gas Company · Section with this well →
| Santa Rosa | 1,016 | 1,666 |
| Yates | 2,339 | 343 |
| Queen | 3,354 | -672 |
| Grayburg | 4,072 | -1,390 |
| San Andres | 4,218 | -1,536 |
| Spraberry | 7,127 | -4,445 |
| Dean | 8,413 | -5,731 |
| Wolfcamp | 8,662 | -5,980 |
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/31740208, documented in the API reference.