WELL · 42-317-42279 · DISTRICT 8
Holcomb 39-40 E #251
Martin County · Spraberry (Trend Area) field · Producing · Horizontal
Holcomb 39-40 E #251 (API 42-317-42279) is a horizontal well in Martin County operated by Diamondback E&P LLC, completed December 24, 2019 and listed as producing on the RRC schedule.
The RRC has issued one drilling permit, issued May 20, 2019, permitted to 11,000 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 10 formation tops, including Santa Rosa, Yates, Queen, Grayburg.
Its lease has reported 403K barrels of oil and 338K mcf of gas since September 2019, last reporting in July 2026.
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.May 20, 2019 |
The sources disagree, which usually means a transfer or a lease-level production filing by a different entity. Petrora goes with the schedule.
- 11,000
- total depth, ft
- 1
- permits on file
- May 20, 2019
- last permit issued
- Dec 24, 2019
- completed
- 403K
- cumulative oil, bbl
- 338K
- cumulative gas, mcf
PRODUCTION FROM PDQ LEASE REPORTS · Sep 2019 THROUGH Jul 2026
Regulatory status · RRC wellbore file
- Schedule
- ON SCHEDULE
- Completed
- Dec 24, 2019
- Shut in
- —
- Plugged
- —
Operator's P-5 on the schedule: X
Surface location
32.429328, -101.851175
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 |
|---|---|---|---|---|---|---|
| Holcomb 39-40 E O-10-53360 | Spraberry (Trend Area) | Diamondback E&P LLC | 1 | 403K | 338K | Sep 2019 – Jul 2026 |
Oil, barrels lease total
Last 12 months 23,638 · prior 12 27,371(-14%)
Gas, mcf lease total
Last 12 months 27,100 · prior 12 38,282(-29%)
Chain of custody
Every operator that reported production on this well's lease, in order.
- 1Endeavor Energy Resources L.P.Dec 2019 → Dec 2024
- 2Diamondback E&P LLCJan 2025 → Apr 2026
Permits
| Permit | Type | Operator | Received | Issued | Spud | Depth |
|---|---|---|---|---|---|---|
| 853046-99 | Drill | Endeavor Energy Resources L.P. | May 13, 2019 | May 20, 2019 | Jul 23, 2019 | 11,000 |
Completions
| Completed | Lease | Field | Operator | Status | Depth |
|---|---|---|---|---|---|
| — | — O-10-53360 | — | — | — | — |
Formation tops
As filed on W-2/G-1. Subsea from 2,680 ft elevation.Download CSV →
| Formation | MD ft | Subsea |
|---|---|---|
| Santa Rosa | 1,000 | 1,680 |
| Yates | 1,634 | 1,046 |
| Queen | 3,050 | -370 |
| Grayburg | 3,647 | -967 |
| San AndresSAN ANDRES - ACTIVE CO2 FLOOD; H | 3,921 | -1,241 |
| Cisco | 6,100 | -3,420 |
| Spraberry | 7,549 | -4,869 |
| Dean | 8,639 | -5,959 |
| Wolfcamp | 9,291 | -6,611 |
| Pennsylvanian | — | — |
Perforations
Perforated and open-hole intervals.
| From | To | Type |
|---|---|---|
| 9,410 | 19,209 | Perforated |
| 9,518 | 19,089 | Perforated |
Casing
Strings as reported, shallowest first.
| Casing in | Set at | Hole in | Cement |
|---|---|---|---|
| 13.375 | 1,005 | 17.5 | 825 S |
| 9.625 | 8,385 | 12.25 | 1,105 S |
| 5.5 | 19,333 | 8.5 | 2,715 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 5, 2020 | May 4, 2020 | Yes |
| 00 | Apr 20, 2020 | Dec 17, 2019 | 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 42-317-42279 → W-2, G-1, plugging reports, as PDFs
- Completion packets for 42-317-42279 → 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.
Holcomb 39-4042-317-42281
0.0 KM · Endeavor Energy Resources L.P. · Section with this well →
| Santa Rosa | 1,000 | 1,680 |
| Yates | 1,634 | 1,046 |
| Queen | 3,050 | -370 |
| Grayburg | 3,689 | -1,009 |
| San Andres | 5,070 | -2,390 |
| Cisco | 6,100 | -3,420 |
| Spraberry | 7,467 | -4,787 |
| Dean | 8,685 | -6,005 |
10 TOPS · FIRST 8
Holcomb 39-4042-317-42280
0.0 KM · Endeavor Energy Resources L.P. · Section with this well →
| Santa Rosa | 1,000 | 1,655 |
| Yates | 1,634 | 1,021 |
| Queen | 3,050 | -395 |
| Grayburg | 3,689 | -1,034 |
| San Andres | 5,070 | -2,415 |
| Cisco | 6,100 | -3,445 |
| Spraberry | 7,467 | -4,812 |
| Dean | 8,685 | -6,030 |
10 TOPS · FIRST 8
Holcomb 39-4042-317-40950
0.4 KM · Endeavor Energy Resources L.P. · Section with this well →
| Santa Rosa | 1,000 | 1,667 |
| Yates | 1,634 | 1,033 |
| Queen | 3,050 | -383 |
| Grayburg | 3,689 | -1,022 |
| San Andres | 3,965 | -1,298 |
| Cisco | 6,100 | -3,433 |
| Spraberry | 7,467 | -4,800 |
| Dean | 8,665 | -5,998 |
10 TOPS · FIRST 8
Holcomb 39-4042-317-40949
0.4 KM · Endeavor Energy Resources L.P. · Section with this well →
| Santa Rosa | 1,000 | 1,668 |
| Yates | 1,634 | 1,034 |
| Queen | 3,050 | -382 |
| Grayburg | 3,689 | -1,021 |
| San Andres | 5,070 | -2,402 |
| Cisco | 6,100 | -3,432 |
| Spraberry | 7,467 | -4,799 |
| Dean | 8,685 | -6,017 |
10 TOPS · FIRST 8
Holcomb 68-41 Unit 242-317-42276
0.9 KM · Endeavor Energy Resources L.P. · Section with this well →
| Santa Rosa | 1,000 | 1,695 |
| Yates | 2,200 | 495 |
| Grayburg | 3,672 | -977 |
| San Andres | 3,946 | -1,251 |
| Queen | 4,100 | -1,405 |
| Spraberry | 7,806 | -5,111 |
| Cisco | 8,500 | -5,805 |
| Dean | 8,664 | -5,969 |
10 TOPS · FIRST 8
Holcomb 68-41 Unit 242-317-42277
0.9 KM · Endeavor Energy Resources L.P. · Section with this well →
| Santa Rosa | 1,000 | 1,695 |
| Yates | 2,200 | 495 |
| Grayburg | 3,672 | -977 |
| San Andres | 3,946 | -1,251 |
| Queen | 4,100 | -1,405 |
| Spraberry | 7,806 | -5,111 |
| Cisco | 8,500 | -5,805 |
| Dean | 8,664 | -5,969 |
10 TOPS · FIRST 8
Holcomb 68-41 Unit 242-317-42278
0.9 KM · Endeavor Energy Resources L.P. · Section with this well →
| Santa Rosa | 1,000 | 1,695 |
| Yates | 1,634 | 1,061 |
| Queen | 3,050 | -355 |
| Grayburg | 3,647 | -952 |
| San Andres | 3,921 | -1,226 |
| Cisco | 6,100 | -3,405 |
| Spraberry | 7,287 | -4,592 |
| Dean | 8,639 | -5,944 |
10 TOPS · FIRST 8
Stevie Ray W Unit42-317-44092
0.9 KM · Petrolegacy Energy II, LLC · Section with this well →
| Santa Rosa | 1,000 | 1,669 |
| Yates | 2,288 | 381 |
| Queen | 3,008 | -339 |
| Grayburg | 3,419 | -750 |
| San Andres | 3,682 | -1,013 |
| Clear Fork | 5,668 | -2,999 |
| Spraberry | 5,668 | -2,999 |
| Cisco | — |
11 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/31742279, documented in the API reference.