WELL · 42-329-36966 · DISTRICT 8
Cosper 37 #4
Midland County · Spraberry (Trend Area) field · Vertical
Cosper 37 #4 (API 42-329-36966) is a plugged well in Midland County, plugged March 23, 2018, last operated by Diamondback E&P LLC.
The RRC has issued 2 drilling permits between 2010 and 2018, permitted to 12,000 ft.
It was permitted by Endeavor Energy Resources L.P. and has since transferred to Diamondback E&P LLC on the wellbore schedule.
Completion filings report 3 formation tops, including Spraberry, Strawn, Atoka.
Its lease has reported 393K barrels of oil and 922K mcf of gas since September 2008, last reporting in July 2026. The lease carries 7 wells, so these are lease totals, not this well alone.
Operator of record
Permitted by Endeavor Energy Resources L.P.; 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 | Endeavor Energy Resources L.P.Jun 6, 2018 |
The sources disagree, which usually means a transfer or a lease-level production filing by a different entity. Petrora goes with the schedule.
- 12,000
- total depth, ft
- 2
- permits on file
- Jun 6, 2018
- last permit issued
- May 9, 2011
- completed
- 393K
- cumulative oil, bbl
- 922K
- cumulative gas, mcf
PRODUCTION FROM PDQ LEASE REPORTS · Sep 2008 THROUGH Jul 2026
Regulatory status · RRC wellbore file
- Schedule
- OFF SCHEDULE
- Completed
- May 9, 2011
- Shut in
- —
- Plugged
- Mar 23, 2018
Surface location
32.056603, -101.862298
OpenStreetMap → · Google Maps →
Permit surface location from the RRC GIS record, in Midland 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; they carry 7 wells in total, so volumes are shared.Why →
| Lease | Field | Reporting operator | Wells | Oil, bbl | Gas, mcf | Reported |
|---|---|---|---|---|---|---|
| Cosper "37" O-10-39198 | Spraberry (Trend Area) | Diamondback E&P LLC | 7 | 393K | 922K | Sep 2008 – Jul 2026 |
Oil, barrels lease total
Last 12 months 4,149 · prior 12 5,714(-27%)
Gas, mcf lease total
Last 12 months 22,536 · prior 12 21,294(+6%)
Chain of custody
Every operator that reported production on this well's lease, in order.
- 1Endeavor Energy Resources L.P.Sep 2008 → Dec 2024
- 2Diamondback E&P LLCJan 2025 → Apr 2026
Permits
| Permit | Type | Operator | Received | Issued | Spud | Depth |
|---|---|---|---|---|---|---|
| 840865-99 | Recompletion | Endeavor Energy Resources L.P. | Jun 5, 2018 | Jun 6, 2018 | Jan 6, 2011 | 10,603 |
| 706138-99 | Drill | Endeavor Energy Resources L.P. | Dec 1, 2010 | Dec 3, 2010 | Jan 6, 2011 | 12,000 |
Completions
| Completed | Lease | Field | Operator | Status | Depth |
|---|---|---|---|---|---|
| — | — O-10-39198 | — | — | — | — |
Formation tops
As filed on W-2/G-1. Subsea from 2,684 ft elevation.Download CSV →
Perforations
Perforated and open-hole intervals.
| From | To | Type |
|---|---|---|
| 7,209 | 10,483 | Perforated |
Casing
Strings as reported, shallowest first.
| Casing in | Set at | Hole in | Cement |
|---|---|---|---|
| 12.75 | 292 | 17.5 | 340 S |
| 8.625 | 5,001 | 11 | 550 S |
| 5.5 | 10,603 | 7.875 | 1,090 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 | Aug 17, 2018 | Jul 27, 2018 | — |
| 00 | Apr 17, 2013 | Nov 30, 2011 | 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 42-329-36966 → W-2, G-1, plugging reports, as PDFs
- Completion packets for 42-329-36966 → 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.
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.
Cosper '37'42-329-36171
0.4 KM · Endeavor Energy Resources L.P. · Section with this well →
| Yates | 2,400 | 280 |
| Spraberry | 7,175 | -4,495 |
| Spraberry | 7,175 | -4,495 |
| Dean | 8,475 | -5,795 |
| Wolfcamp | 8,800 | -6,120 |
| Strawn | 10,217 | -7,537 |
| Bend | 10,375 | -7,695 |
| Atoka | 11,475 | -8,795 |
Cosper '37'42-329-32138
0.5 KM · Tamarack Petroleum Company, Inc. · Section with this well →
| Yates | 2,415 | 266 |
| Spraberry | 7,705 | -5,024 |
| Dean | 8,484 | -5,803 |
| Wolfcamp | 8,824 | -6,143 |
| Strawn | 10,222 | -7,541 |
| Bend | 10,384 | -7,703 |
| Devonian | 11,114 | -8,433 |
| Atoka | — |
Cosper '37'42-329-36605
0.5 KM · Endeavor Energy Resources L.P. · Section with this well →
| Spraberry | 7,200 | -4,504 |
| Wolfcamp | 8,850 | -6,154 |
| Strawn | 10,240 | -7,544 |
| Atoka | — |
Cosper 37-48 WSL42-329-44495
1.2 KM · Endeavor Energy Resources L.P. · Section with this well →
| Santa Rosa | 1,033 | 656 |
| Yates | 2,435 | -746 |
| Queen | 3,376 | -1,687 |
| Grayburg | 3,779 | -2,090 |
| San Andres | 4,118 | -2,429 |
| Clear Fork | 6,334 | -4,645 |
| Spraberry | 7,276 | -5,587 |
| Rustler | — |
10 TOPS · FIRST 8
Cosper 37-48 WSL42-329-44496
1.2 KM · Endeavor Energy Resources L.P. · Section with this well →
| Santa Rosa | 1,033 | 1,656 |
| Yates | 2,435 | 254 |
| Queen | 3,376 | -687 |
| Grayburg | 3,779 | -1,090 |
| San Andres | 4,118 | -1,429 |
| Clear Fork | 6,334 | -3,645 |
| Spraberry | 7,299 | -4,610 |
| Seven Rivers | — |
10 TOPS · FIRST 8
Cosper 37-48 WSL42-329-44494
1.2 KM · Endeavor Energy Resources L.P. · Section with this well →
| Santa Rosa | 1,033 | |
| Yates | 2,435 | |
| Queen | 3,376 | |
| Grayburg | 3,779 | |
| San Andres | 4,118 | |
| Clear Fork | 6,334 | |
| Spraberry | 7,288 | |
| Seven Rivers | — |
10 TOPS · FIRST 8
Cosper 37-48 WSL42-329-44493
1.2 KM · Endeavor Energy Resources L.P. · Section with this well →
| Santa Rosa | 1,033 | |
| Yates | 2,435 | |
| Queen | 3,376 | |
| Grayburg | 3,779 | |
| San Andres | 4,118 | |
| Clear Fork | 6,334 | |
| Spraberry | 7,291 | |
| Rustler | — |
10 TOPS · FIRST 8
Cosper 37-48 WSL42-329-44501
1.2 KM · Endeavor Energy Resources L.P. · Section with this well →
| Santa Rosa | 1,033 | |
| Yates | 2,435 | |
| Queen | 3,376 | |
| Grayburg | 3,779 | |
| San Andres | 4,118 | |
| Clear Fork | 6,334 | |
| Spraberry | 7,295 | |
| Pennsylvanian | — |
17 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/32936966, documented in the API reference.