WELL · 42-317-33934 · DISTRICT 8
M.a.k.(spraberry)unit #4201
Martin County · Spraberry (Trend Area) field · Vertical
M.A.K.(Spraberry)Unit #4201 (API 42-317-33934) is a well in Martin County operated by Diamondback E&P LLC, completed May 5, 1993.
The RRC has issued 2 drilling permits (amended once) between 1993 and 2019, permitted to 12,200 ft.
Completion filings report 5 formation tops, including Strawn, Up Mississippian, Mississippian, Woodford.
Its 4 leases have reported 1.54M barrels of oil and 925K mcf of gas since January 1993, last reporting in July 2026. The leases carry 42 wells, so these are lease totals, not this well alone.
Operator of record
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 | Diamondback E&P LLCMay 29, 2019 |
- 12,200
- total depth, ft
- 3
- permits on file
- May 29, 2019
- last permit issued
- May 5, 1993
- completed
- 1.54M
- cumulative oil, bbl
- 925K
- cumulative gas, mcf
PRODUCTION FROM PDQ LEASE REPORTS · Jan 1993 THROUGH Jul 2026
Regulatory status · RRC wellbore file
- Schedule
- OFF SCHEDULE
- Completed
- May 5, 1993
- Shut in
- —
- Plugged
- —
Surface location
32.472648, -102.185805
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 4 leases this well is completed on; they carry 42 wells in total, so volumes are shared.Why →
| Lease | Field | Reporting operator | Wells | Oil, bbl | Gas, mcf | Reported |
|---|---|---|---|---|---|---|
| M.a.k.(spraberry)unit O-10-50198 | Spraberry (Trend Area) | Diamondback E&P LLC | 14 | 631K | 442K | Nov 2017 – Jul 2026 |
| University 6-42 A O-10-55849 | Spraberry (Trend Area) | Diamondback E&P LLC | 1 | 0 | 0 | Jul 2021 – Jul 2026 |
| M.a.k.(spraberry)unit O-10-35243 | M.A.K. (Spraberry) | Diamondback E&P LLC | 25 | 897K | 462K | Feb 1997 – Sep 2020 |
| University O-10-17840 | M.A.K. (Spraberry) | Coastal Management Corporation | 2 | 11.4K | 20.5K | Jan 1993 – May 1997 |
Oil, barrels lease total
Last 12 months 24,135 · prior 12 39,996(-40%)
Gas, mcf lease total
Last 12 months 47,431 · prior 12 45,572(+4%)
Chain of custody
Every operator that reported production on this well's lease, in order.
- 1Knox Industries, Inc.Jan 1993 → Jun 1995
- 2Trinity Operating & Prod., Inc.Jul 1995 → Jul 1995
- 3Coastal Management CorporationAug 1995 → Apr 2000
- 4Aroc (Texas) Inc.May 2000 → Nov 2007
- 5Southern Bay Operating, L.L.C.Dec 2007 → Jun 2013
- 6HK Energy Operating, LLCJul 2013 → Nov 2013
- 7Energyquest II, LLCDec 2013 → Oct 2018
- 8Diamondback E&P LLCNov 2018 → Apr 2026
Permits
| Permit | Type | Operator | Received | Issued | Spud | Depth |
|---|---|---|---|---|---|---|
| 853457-99 | Field transfer | Diamondback E&P LLC | May 23, 2019 | May 29, 2019 | Mar 10, 1993 | 12,190 |
| 409962-98 | Drill | Knox Industries, Inc. | May 25, 1993 | Mar 17, 1993 | — | 8,555 |
| 409962-99 | Drill | Knox Industries, Inc. | Mar 17, 1993 | Mar 17, 1993 | Mar 19, 1993 | 12,200 |
Completions
| Completed | Lease | Field | Operator | Status | Depth |
|---|---|---|---|---|---|
| — | — O-10-17840 | — | — | — | — |
| — | — O-10-35243 | — | — | — | — |
| — | — O-10-50198 | — | — | — | — |
| — | — O-10-55849 | — | — | — | — |
Formation tops
As filed on W-2/G-1. Subsea from 2,890 ft elevation.Download CSV →
| Formation | MD ft | Subsea |
|---|---|---|
| Strawn | 10,828 | -7,938 |
| UP Mississippian | 11,296 | -8,406 |
| MississippianUPPER MISSISSIPPIAN | 11,296 | -8,406 |
| MississippianLOWER MISS | 11,703 | -8,813 |
| MississippianLOWER MISSISSIPPIAN | 11,703 | -8,813 |
| Woodford | 12,043 | -9,153 |
| Silurian (undifferentiated)SILURIAN | 12,143 | -9,253 |
Perforations
Perforated and open-hole intervals.
| From | To | Type |
|---|---|---|
| 8,446 | 8,490 | Perforated |
Casing
Strings as reported, shallowest first.
| Casing in | Set at | Hole in | Cement |
|---|---|---|---|
| 13.375 | 419 | 17.125 | 425 S |
| 8.625 | 4,500 | 11 | 2,150 S |
| 5.5 | 12,150 | 7.875 | 650 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 8, 2021 | Aug 25, 2021 | — |
| 00 | Jul 12, 2021 | Jun 7, 2019 | Yes |
| 00 | Nov 18, 2019 | Jun 7, 2019 | Yes |
| 00 | Apr 2, 1997 | Jun 1, 1993 | Yes |
| 00 | Jul 13, 1993 | Jun 1, 1993 | Yes |
| 00 | Jun 11, 1993 | — | — |
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 42-317-33934 → W-2, G-1, plugging reports, as PDFs
- Completion packets for 42-317-33934 → 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.
UL Comanche 282942-317-41247
0.3 KM · EXL Petroleum Operating Inc. · Section with this well →
| Santa Rosa | 1,301 | 1,679 |
| Yates | 3,877 | -897 |
| San Andres | 4,641 | -1,661 |
| Spraberry | 8,208 | -5,228 |
| Wolfcamp | 9,586 | -6,606 |
| Cisco | — | |
| Pennsylvanian | — | |
| Queen | — |
10 TOPS · FIRST 8
UL Comanche 42A42-317-41272
0.5 KM · EXL Petroleum Operating Inc. · Section with this well →
| Santa Rosa | 1,280 | 1,606 |
| Grayburg | 4,370 | -1,484 |
| Spraberry | 8,173 | -5,287 |
| Wolfcamp | 9,570 | -6,684 |
| Silurian (undifferentiated) | — | |
| Cisco | — | |
| Dean | — | |
| Devonian | — |
15 TOPS · FIRST 8
UL Comanche 42B42-317-41271
0.9 KM · EXL Petroleum Operating Inc. · Section with this well →
| Santa Rosa | 1,325 | 1,586 |
| Yates | 2,951 | -40 |
| Clear Fork | 6,391 | -3,480 |
| Spraberry | 8,227 | -5,316 |
| Wolfcamp | 9,610 | -6,699 |
| Grayburg | — | |
| Cisco | — | |
| Dean | — |
10 TOPS · FIRST 8
M.A.K. (Spraberry) Unit42-317-00022
0.9 KM · Diamondback E&P LLC · Section with this well →
| Spraberry | 8,240 | -5,317 |
| Spraberry | 8,690 | -5,767 |
State University -DF-42-317-34067
1.1 KM · Diamondback E&P LLC · Section with this well →
| San Andres | 4,680 | -1,782 |
| Clear Fork | 6,375 | -3,477 |
| Spraberry | 8,466 | -5,568 |
M.A.K. (Spraberry) Unit42-317-10047
1.2 KM · Diamondback E&P LLC · Section with this well →
| Spraberry | 8,240 | -5,345 |
| Spraberry | 8,690 | -5,795 |
UL Comanche J 29-4242-317-43394
1.2 KM · Diamondback E&P LLC · Section with this well →
| Yates | 2,933 | -47 |
| Seven Rivers | 3,149 | -263 |
| Queen | 3,912 | -1,026 |
| Grayburg | 4,045 | -1,159 |
| San Andres | 4,417 | -1,531 |
| Glorieta | 5,406 | -2,520 |
| Clear Fork | 6,366 | -3,480 |
| Spraberry | 8,215 | -5,329 |
11 TOPS · FIRST 8
UL Comanche H 29-4242-317-43392
1.2 KM · Diamondback E&P LLC · Section with this well →
| Yates | 2,928 | -42 |
| Queen | 3,912 | -1,026 |
| Grayburg | 4,044 | -1,158 |
| San Andres | 4,418 | -1,532 |
| Glorieta | 5,426 | -2,540 |
| Clear Fork | 6,363 | -3,477 |
| Spraberry | 8,206 | -5,320 |
| Wolfcamp | — |
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/31733934, documented in the API reference.