WELL · 42-227-39174 · DISTRICT 8
Williams 21 C #4WA
Howard County · Spraberry (Trend Area) field · Producing · Horizontal
Williams 21 C #4WA (API 42-227-39174) is a horizontal well in Howard County operated by Diamondback E&P LLC, completed February 6, 2018 and listed as producing on the RRC schedule.
The RRC has issued one drilling permit (amended once), issued June 28, 2017, permitted to 9,155 ft.
Completion filings report 10 formation tops, including Yates, Seven Rivers, San Andres, Glorieta.
Its lease has reported 665K barrels of oil and 3.22M mcf of gas since February 2018, last reporting in July 2026. The lease carries 3 wells, so these are lease totals, not this well alone.
Operator of record
- Based in
- Midland, TX
- P-5 status
- Active – Extension (X)
- P-5 last filed
- May 4, 2026
- Permits on file
- 5,237
- Phone
- (432) 221-7400
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 28, 2017 |
- 9,155
- total depth, ft
- 2
- permits on file
- Jun 28, 2017
- last permit issued
- Feb 6, 2018
- completed
- 665K
- cumulative oil, bbl
- 3.22M
- cumulative gas, mcf
PRODUCTION FROM PDQ LEASE REPORTS · Feb 2018 THROUGH Jul 2026
Regulatory status · RRC wellbore file
- Schedule
- ON SCHEDULE
- Completed
- Feb 6, 2018
- Shut in
- —
- Plugged
- —
Operator's P-5 on the schedule: Active – Extension (X)
Surface location
32.368580, -101.661329
Permit surface location from the RRC GIS record, in Howard 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 3 wells in total, so volumes are shared.Why →
| Lease | Field | Reporting operator | Wells | Oil, bbl | Gas, mcf | Reported |
|---|---|---|---|---|---|---|
| Williams 21 C O-10-52008 | Spraberry (Trend Area) | Diamondback E&P LLC | 3 | 665K | 3.22M | Feb 2018 – Jul 2026 |
Gas, mcf lease total
Last 12 months 702,993 · prior 12 811,253(-13%)
Oil, barrels lease total
Last 12 months 28,359 · prior 12 52,552(-46%)
Chain of custody
Every operator that reported production on this well's lease, in order.
- 1Diamondback E&P LLCFeb 2018 → Apr 2026
Permits
| Permit | Type | Operator | Received | Issued | Spud | Depth |
|---|---|---|---|---|---|---|
| 827841-98 | Drill | Diamondback E&P LLC | Jul 30, 2019 | Jun 28, 2017 | Aug 4, 2017 | 9,155 |
| 827841-99 | Drill | Diamondback E&P LLC | Jun 14, 2017 | Jun 28, 2017 | Aug 4, 2017 | 9,155 |
Completions
| Completed | Lease | Field | Operator | Status | Depth |
|---|---|---|---|---|---|
| — | — O-10-52008 | — | — | — | — |
Formation tops
As filed on W-2/G-1. Subsea from 2,551 ft elevation.Download CSV →
| Formation | MD ft | Subsea |
|---|---|---|
| Yates | 1,924 | 627 |
| Seven Rivers | 2,099 | 452 |
| San AndresSAN ANDRES - HIGH FLOWS, H2S, CO | 3,684 | -1,133 |
| Glorieta | 4,255 | -1,704 |
| Clear ForkCLEARFORK - SEVERE WATER FLOWS | 4,874 | -2,323 |
| Spraberry | 6,632 | -4,081 |
| Leonard | 7,550 | -4,999 |
| Dean | 7,906 | -5,355 |
| Wolfcamp | 8,092 | -5,541 |
| Coleman Junction | — | — |
Perforations
Perforated and open-hole intervals.
| From | To | Type |
|---|---|---|
| 8,454 | 18,784 | Perforated |
Casing
Strings as reported, shallowest first.
| Casing in | Set at | Hole in | Cement |
|---|---|---|---|
| 13.375 | 443 | 17.5 | 580 S |
| 9.625 | 7,655 | 12.25 | 830 S |
| 5.5 | 18,878 | 8.5 | 2,795 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 3, 2019 | Mar 7, 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 42-227-39174 → W-2, G-1, plugging reports, as PDFs
- Completion packets for 42-227-39174 → 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 neighbors, subsea-aligned so they line up regardless of surface terrain.
Williams 21 B42-227-39175
0.0 KM · Diamondback E&P LLC · Section with this well →
| Yates | 1,923 | 628 |
| Seven Rivers | 2,102 | 449 |
| San Andres | 3,684 | -1,133 |
| Glorieta | 4,245 | -1,694 |
| Clear Fork | 4,872 | -2,321 |
| Spraberry | 6,629 | -4,078 |
| Leonard | 7,543 | -4,992 |
| Dean | 7,894 | -5,343 |
10 TOPS · FIRST 8
Williams 21 A42-227-39176
0.0 KM · Diamondback E&P LLC · Section with this well →
| Yates | 1,925 | 626 |
| Seven Rivers | 2,098 | 453 |
| San Andres | 3,668 | -1,117 |
| Glorieta | 4,218 | -1,667 |
| Clear Fork | 4,860 | -2,309 |
| Spraberry | 6,620 | -4,069 |
| Leonard | 7,537 | -4,986 |
| Dean | 7,890 | -5,339 |
10 TOPS · FIRST 8
Williams 21 B42-227-40267
0.1 KM · Diamondback E&P LLC · Section with this well →
| Yates | 1,930 | 621 |
| Seven Rivers | 2,028 | 523 |
| San Andres | 3,411 | -860 |
| Glorieta | 4,223 | -1,672 |
| Clear Fork | 4,843 | -2,292 |
| Spraberry | 6,598 | -4,047 |
| Leonard | — | |
| Coleman Junction | — |
10 TOPS · FIRST 8
Williams 21 B42-227-40268
0.1 KM · Diamondback E&P LLC · Section with this well →
| Yates | 1,943 | 608 |
| Seven Rivers | 2,045 | 506 |
| San Andres | 3,415 | -864 |
| Glorieta | 4,243 | -1,692 |
| Clear Fork | 4,862 | -2,311 |
| Spraberry | 6,596 | -4,045 |
| Dean | 7,880 | -5,329 |
| Wolfcamp | 8,018 | -5,467 |
12 TOPS · FIRST 8
Williams 21 C42-227-40269
0.1 KM · Diamondback E&P LLC · Section with this well →
| Yates | 1,943 | 608 |
| Seven Rivers | 2,028 | 523 |
| San Andres | 3,410 | -859 |
| Glorieta | 4,230 | -1,679 |
| Clear Fork | 4,860 | -2,309 |
| Spraberry | 6,585 | -4,034 |
| Coleman Junction | — | |
| Dean | — |
10 TOPS · FIRST 8
Williams 21 C42-227-40270
0.1 KM · Diamondback E&P LLC · Section with this well →
| Yates | 1,928 | 624 |
| Seven Rivers | 2,053 | 499 |
| San Andres | 3,431 | -879 |
| Glorieta | 4,254 | -1,702 |
| Clear Fork | 4,862 | -2,310 |
| Spraberry | 6,597 | -4,045 |
| Dean | 7,871 | -5,319 |
| Wolfcamp | 8,023 | -5,471 |
10 TOPS · FIRST 8
Demon Deacon 22-25 D42-227-41839
0.2 KM · Birch Operations, Inc. · Section with this well →
| Santa Rosa | 840 | 1,712 |
| Rustler | 1,258 | 1,294 |
| Yates | 1,938 | 614 |
| Seven Rivers | 2,071 | 481 |
| San Andres | 3,423 | -871 |
| Glorieta | 4,571 | -2,019 |
| Clear Fork | 4,856 | -2,304 |
| Spraberry | 6,596 | -4,044 |
10 TOPS · FIRST 8
Demon Deacon 22-25 E42-227-42522
0.8 KM · Birch Operations, Inc. · Section with this well →
| Santa Rosa | 807 | 1,760 |
| Rustler | 1,257 | 1,310 |
| Yates | 1,933 | 634 |
| Seven Rivers | 2,071 | 496 |
| San Andres | 3,422 | -855 |
| Glorieta | 4,529 | -1,962 |
| Clear Fork | 4,828 | -2,261 |
| Spraberry | 6,598 | -4,031 |
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/22739174, documented in the API reference.