WELL · 42-475-38130 · DISTRICT 8
Mud Hen 57-31 D #4BS
Ward County · Hoefs T-K (Wolfcamp) field · Producing · Horizontal
Mud Hen 57-31 D #4BS (API 42-475-38130) is a horizontal well in Ward County operated by Diamondback E&P LLC, completed June 26, 2021 and listed as producing on the RRC schedule.
The RRC has issued one drilling permit, issued April 14, 2020, permitted to 13,190 ft.
Completion filings report 10 formation tops, including Delaware, Capitan, Clear Fork, Glorieta.
Its lease has reported 520K barrels of oil and 1.74M mcf of gas since August 2020, last reporting in July 2026.
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 LLCApr 14, 2020 |
- 13,190
- total depth, ft
- 1
- permits on file
- Apr 14, 2020
- last permit issued
- Jun 26, 2021
- completed
- 520K
- cumulative oil, bbl
- 1.74M
- cumulative gas, mcf
PRODUCTION FROM PDQ LEASE REPORTS · Aug 2020 THROUGH Jul 2026
Regulatory status · RRC wellbore file
- Schedule
- ON SCHEDULE
- Completed
- Jun 26, 2021
- Shut in
- —
- Plugged
- —
Operator's P-5 on the schedule: X
Surface location
31.439631, -103.306925
OpenStreetMap → · Google Maps →
Permit surface location from the RRC GIS record, in Ward 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 |
|---|---|---|---|---|---|---|
| Mud Hen 57-31 D O-10-54957 | Hoefs T-K (Wolfcamp) | Diamondback E&P LLC | 1 | 520K | 1.74M | Aug 2020 – Jul 2026 |
Oil, barrels lease total
Last 12 months 38,373 · prior 12 59,040(-35%)
Gas, mcf lease total
Last 12 months 145,692 · prior 12 218,485(-33%)
Chain of custody
Every operator that reported production on this well's lease, in order.
- 1Diamondback E&P LLCJun 2021 → Apr 2026
Permits
| Permit | Type | Operator | Received | Issued | Spud | Depth |
|---|---|---|---|---|---|---|
| 862730-99 | Drill | Diamondback E&P LLC | Mar 12, 2020 | Apr 14, 2020 | May 1, 2020 | 13,190 |
Completions
| Completed | Lease | Field | Operator | Status | Depth |
|---|---|---|---|---|---|
| — | — O-10-54957 | — | — | — | — |
Formation tops
As filed on W-2/G-1. Subsea from 2,614 ft elevation.Download CSV →
| Formation | MD ft | Subsea |
|---|---|---|
| Delaware | 4,965 | -2,351 |
| CapitanCAPITAN REEF - HIGH FLOWS | — | — |
| Clear ForkCLEARFORK | — | — |
| Glorieta | — | — |
| Holt | — | — |
| Queen | — | — |
| Rustler | — | — |
| San AndresSAN ANDRES - HIGH FLOWS, H2S, CO | — | — |
| Seven Rivers | — | — |
| Yates | — | — |
Perforations
Perforated and open-hole intervals.
| From | To | Type |
|---|---|---|
| 11,060 | 22,833 | Perforated |
Casing
Strings as reported, shallowest first.
| Casing in | Set at | Hole in | Cement |
|---|---|---|---|
| 13.375 | 2,476 | 17.5 | 3,668 S |
| 9.625 | 10,335 | 12.25 | 1,810 S |
| 5.5 | 22,924 | 8.5 | 3,445 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 | Nov 22, 2021 | Nov 3, 2021 | Yes |
| 00 | Nov 2, 2020 | Oct 13, 2020 | — |
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 42-475-38130 → W-2, G-1, plugging reports, as PDFs
- Completion packets for 42-475-38130 → 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.
Mud Hen 57-31 B42-475-38129
0.0 KM · Diamondback E&P LLC · Section with this well →
| Delaware | 4,961 | -2,347 |
| Glorieta | — | |
| Holt | — | |
| Queen | — | |
| Rustler | — | |
| San Andres | — | |
| Seven Rivers | — | |
| Yates | — |
10 TOPS · FIRST 8
Mud Hen 57-31 C42-475-38128
0.1 KM · Diamondback E&P LLC · Section with this well →
| Delaware | 4,960 | -2,335 |
| Glorieta | — | |
| Holt | — | |
| Queen | — | |
| Rustler | — | |
| San Andres | — | |
| Seven Rivers | — | |
| Yates | — |
10 TOPS · FIRST 8
Mud Hen 57-31 A42-475-38127
0.1 KM · Diamondback E&P LLC · Section with this well →
| Delaware | 4,965 | -2,340 |
| Capitan | — | |
| Clear Fork | — | |
| Glorieta | — | |
| Holt | — | |
| Queen | — | |
| Rustler | — | |
| San Andres | — |
10 TOPS · FIRST 8
Section 5742-475-37674
0.5 KM · Jetta Operating Company, Inc. · Section with this well →
| Delaware | 4,936 | -2,350 |
| Clear Fork | — | |
| Glorieta | — | |
| Holt | — | |
| Queen | — | |
| Rustler | — | |
| San Andres | — | |
| Seven Rivers | — |
10 TOPS · FIRST 8
Fire Frog 57-32 D42-475-38158
0.9 KM · Diamondback E&P LLC · Section with this well →
| Lamar | 4,972 | -2,365 |
| Seven Rivers | — | |
| San Andres | — | |
| Rustler | — | |
| Queen | — | |
| Holt | — | |
| Glorieta | — | |
| Delaware | — |
10 TOPS · FIRST 8
Fire Frog 57-32 C42-475-38157
0.9 KM · Diamondback E&P LLC · Section with this well →
| Lamar | 4,961 | -2,354 |
| Yates | — | |
| Capitan | — | |
| Clear Fork | — | |
| Delaware | — | |
| Glorieta | — | |
| Holt | — | |
| Queen | — |
11 TOPS · FIRST 8
Fire Frog 57-32 B42-475-38156
0.9 KM · Diamondback E&P LLC · Section with this well →
| Lamar | 4,964 | -2,352 |
| Delaware | — | |
| Glorieta | — | |
| Holt | — | |
| Queen | — | |
| Rustler | — | |
| San Andres | — | |
| Seven Rivers | — |
10 TOPS · FIRST 8
Fire Frog 57-32 A42-475-38155
0.9 KM · Diamondback E&P LLC · Section with this well →
| Lamar | 4,972 | -2,363 |
| Yates | — | |
| Rustler | — | |
| Queen | — | |
| Holt | — | |
| Glorieta | — | |
| Delaware | — | |
| Clear Fork | — |
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/47538130, documented in the API reference.