WELL · 42-317-44315 · DISTRICT 8
Knox 4 #204
Martin County · Spraberry (Trend Area) R 40 Exc field · Horizontal
Knox 4 #204 (API 42-317-44315) is a horizontal well in Martin County operated by Diamondback E&P LLC, completed May 1, 2023.
The RRC has issued one drilling permit (amended once), issued June 16, 2022, permitted to 10,200 ft.
Completion filings report 10 formation tops, including Yates, Queen, Grayburg, San Andres.
Its 2 leases have reported 502K barrels of oil and 930K mcf of gas since April 2023, last reporting in July 2026. The leases carry 4 wells, so these are lease totals, not this well alone.
Operator of record
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 | Diamondback E&P LLCJun 16, 2022 |
- 10,200
- total depth, ft
- 2
- permits on file
- Jun 16, 2022
- last permit issued
- May 1, 2023
- completed
- 502K
- cumulative oil, bbl
- 930K
- cumulative gas, mcf
PRODUCTION FROM PDQ LEASE REPORTS · Apr 2023 THROUGH Jul 2026
Regulatory status · RRC wellbore file
- Schedule
- OFF SCHEDULE
- Completed
- May 1, 2023
- Shut in
- —
- Plugged
- —
Surface location
32.112752, -101.794815
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 2 leases this well is completed on; they carry 4 wells in total, so volumes are shared.Why →
| Lease | Field | Reporting operator | Wells | Oil, bbl | Gas, mcf | Reported |
|---|---|---|---|---|---|---|
| Knox 4 O-10-60740 | Spraberry (Trend Area) | Diamondback E&P LLC | 2 | 502K | 930K | Apr 2023 – Jul 2026 |
| Knox 4 O-10-59864 | Spraberry (Trend Area) R 40 Exc | Diamondback E&P LLC | 2 | 0 | 0 | Apr 2023 – Jun 2024 |
Oil, barrels lease total
Last 12 months 76,174 · prior 12 116,130(-34%)
Gas, mcf lease total
Last 12 months 192,130 · prior 12 224,596(-14%)
Chain of custody
Every operator that reported production on this well's lease, in order.
- 1Diamondback E&P LLCApr 2023 → Apr 2026
Permits
| Permit | Type | Operator | Received | Issued | Spud | Depth |
|---|---|---|---|---|---|---|
| 879379-98 | Drill | Diamondback E&P LLC | Sep 26, 2023 | Jun 16, 2022 | Aug 3, 2022 | 8,267 |
| 879379-99 | Drill | Lario Oil & Gas Company | Apr 22, 2022 | Jun 16, 2022 | Aug 3, 2022 | 10,200 |
Completions
| Completed | Lease | Field | Operator | Status | Depth |
|---|---|---|---|---|---|
| — | — O-10-59864 | — | — | — | — |
| — | — O-10-60740 | — | — | — | — |
Formation tops
As filed on W-2/G-1. Subsea from 2,673 ft elevation.Download CSV →
| Formation | MD ft | Subsea |
|---|---|---|
| Yates | 2,888 | -215 |
| Queen | 3,214 | -541 |
| Grayburg | 3,771 | -1,098 |
| San AndresSAN ANDRES - ACTIVE CO2 FLOOD; H | 3,957 | -1,284 |
| Spraberry | 7,078 | -4,405 |
| Cisco | — | — |
| Dean | — | — |
| Pennsylvanian | — | — |
| Santa Rosa | — | — |
| Wolfcamp | — | — |
Perforations
Perforated and open-hole intervals.
| From | To | Type |
|---|---|---|
| 8,619 | 16,165 | Perforated |
Casing
Strings as reported, shallowest first.
| Casing in | Set at | Hole in | Cement |
|---|---|---|---|
| 13.375 | 1,423 | 17.5 | 1,120 S |
| 9.625 | 7,567 | 12.25 | 1,405 S |
| 5.5 | 16,258 | 8.5 | 2,000 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 | Apr 30, 2024 | Apr 29, 2024 | — |
| 00 | Nov 14, 2023 | Sep 21, 2023 | 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 42-317-44315 → W-2, G-1, plugging reports, as PDFs
- Completion packets for 42-317-44315 → 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.
Knox 342-317-44245
0.0 KM · Lario Oil & Gas Company · Section with this well →
| Santa Rosa | 1,092 | 1,581 |
| Yates | 2,308 | 365 |
| Queen | 3,217 | -544 |
| Grayburg | 3,775 | -1,102 |
| San Andres | 3,962 | -1,289 |
| Clear Fork | 6,069 | -3,396 |
| Spraberry | 7,076 | -4,403 |
| Dean | — |
10 TOPS · FIRST 8
Knox 342-317-44244
0.0 KM · Lario Oil & Gas Company · Section with this well →
| Santa Rosa | 1,093 | 1,580 |
| Yates | 2,305 | 368 |
| Queen | 3,217 | -544 |
| Grayburg | 3,776 | -1,103 |
| San Andres | 3,948 | -1,275 |
| Clear Fork | 6,079 | -3,406 |
| Spraberry | 7,079 | -4,406 |
| Dean | 8,398 | -5,725 |
11 TOPS · FIRST 8
Knox 442-317-44312
0.0 KM · Lario Oil & Gas Company · Section with this well →
| Santa Rosa | 1,048 | 1,623 |
| Yates | 2,287 | 384 |
| Queen | 3,214 | -543 |
| Grayburg | 3,773 | -1,102 |
| San Andres | 3,959 | -1,288 |
| Clear Fork | 6,070 | -3,399 |
| Spraberry | 7,076 | -4,405 |
| Dean | 8,403 | -5,732 |
11 TOPS · FIRST 8
Washington 242-317-44357
0.1 KM · Lario Oil & Gas Company · Section with this well →
| Yates | 2,283 | 389 |
| Queen | 2,875 | -203 |
| Grayburg | 3,311 | -639 |
| San Andres | 3,740 | -1,068 |
| Clear Fork | 6,072 | -3,400 |
| Spraberry | 7,077 | -4,405 |
| Wolfcamp | — | |
| Cisco | — |
10 TOPS · FIRST 8
Washington 242-317-44356
0.1 KM · Lario Oil & Gas Company · Section with this well →
| Yates | 2,279 | 394 |
| Queen | 2,864 | -191 |
| Grayburg | 3,313 | -640 |
| San Andres | 3,719 | -1,046 |
| Clear Fork | 6,055 | -3,382 |
| Spraberry | 7,056 | -4,383 |
| Dean | 8,361 | -5,688 |
| Wolfcamp | 8,572 | -5,899 |
10 TOPS · FIRST 8
Washington 342-317-42513
0.1 KM · Lario Oil & Gas Company · Section with this well →
| Santa Rosa | 993 | 1,679 |
| Yates | 2,287 | 385 |
| Queen | 3,206 | -534 |
| Grayburg | 3,949 | -1,277 |
| San Andres | 4,085 | -1,413 |
| Spraberry | 7,079 | -4,407 |
| Dean | 8,398 | -5,726 |
| Wolfcamp | 8,589 | -5,917 |
10 TOPS · FIRST 8
Washington 242-317-42512
0.1 KM · Lario Oil & Gas Company · Section with this well →
| Santa Rosa | 987 | 1,685 |
| Yates | 2,287 | 385 |
| Queen | 3,208 | -536 |
| Grayburg | 3,956 | -1,284 |
| San Andres | 4,085 | -1,413 |
| Spraberry | 7,079 | -4,407 |
| Cisco | — | |
| Wolfcamp | — |
10 TOPS · FIRST 8
Washington42-317-42171
0.1 KM · Lario Oil & Gas Company · Section with this well →
| Santa Rosa | 976 | 1,695 |
| Yates | 2,296 | 375 |
| Queen | 3,230 | -559 |
| Grayburg | 3,957 | -1,286 |
| San Andres | 4,082 | -1,411 |
| Spraberry | 7,080 | -4,409 |
| Dean | 8,391 | -5,720 |
| Wolfcamp | 8,601 | -5,930 |
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/31744315, documented in the API reference.