WELL · 42-329-47127 · DISTRICT 10
Mask HZ Unit #1004LH
Midland County · Spraberry (Trend Area) field · Water Supply · Horizontal
Mask HZ Unit #1004LH (API 42-329-47127) is a horizontal well in Midland County operated by Cog Operating LLC, completed October 27, 2025 and listed as water supply on the RRC schedule.
The RRC has issued one drilling permit, issued July 22, 2024, permitted to 11,000 ft.
Completion filings report 10 formation tops, including Santa Rosa, Rustler, Yates, Seven Rivers.
Its lease has reported 5.01M barrels of oil and 8.53M mcf of gas since June 2016, last reporting in July 2026. The lease carries 22 wells, so these are lease totals, not this well alone.
Operator of record
Midland, TX · P-5 Y, filed May 4, 2026 · 4,568 permits on file · (432) 853-2355
SOURCE · RRC EWA WELLBORE SCHEDULE
What each RRC source says
| Wellbore schedule | COG Operating LLC |
| Production reports | COG Operating LLCthrough Apr 2026 |
| Latest permit | COG Operating LLCJul 22, 2024 |
- 11,000
- total depth, ft
- 1
- permits on file
- Jul 22, 2024
- last permit issued
- Oct 27, 2025
- completed
- 5.01M
- cumulative oil, bbl
- 8.53M
- cumulative gas, mcf
PRODUCTION FROM PDQ LEASE REPORTS · Jun 2016 THROUGH Jul 2026
Regulatory status · RRC wellbore file
- Schedule
- ON SCHEDULE
- Completed
- Oct 27, 2025
- Shut in
- —
- Plugged
- —
Operator's P-5 on the schedule: X
Surface location
32.067295, -102.110823
OpenStreetMap → · Google Maps →
Permit surface location from the RRC GIS record, in Midland 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 22 wells in total, so volumes are shared.Why →
| Lease | Field | Reporting operator | Wells | Oil, bbl | Gas, mcf | Reported |
|---|---|---|---|---|---|---|
| Mask HZ Unit O-10-48498 | Spraberry (Trend Area) | COG Operating LLC | 22 | 5.01M | 8.53M | Jun 2016 – Jul 2026 |
Oil, barrels lease total
Last 12 months 110,225 · prior 12 182,158(-39%)
Gas, mcf lease total
Last 12 months 315,323 · prior 12 392,018(-20%)
Chain of custody
Every operator that reported production on this well's lease, in order.
- 1RSP Permian, LLCOct 2016 → Jul 2018
- 2COG Operating LLCAug 2018 → Apr 2026
Permits
| Permit | Type | Operator | Received | Issued | Spud | Depth |
|---|---|---|---|---|---|---|
| 900614-99 | Drill | COG Operating LLC | Jun 19, 2024 | Jul 22, 2024 | May 12, 2025 | 11,000 |
Completions
| Completed | Lease | Field | Operator | Status | Depth |
|---|---|---|---|---|---|
| — | — O-10-48498 | — | — | — | — |
Formation tops
As filed on W-2/G-1. Subsea from 2,811 ft elevation.Download CSV →
| Formation | MD ft | Subsea |
|---|---|---|
| Santa Rosa | 1,157 | 1,654 |
| Rustler | 1,854 | 957 |
| Yates | 2,826 | -15 |
| Seven Rivers | 3,194 | -383 |
| Queen | 3,585 | -774 |
| Grayburg | 4,058 | -1,247 |
| San AndresSAN ANDRES - HIGH FLOWS, H2S, CO | 4,592 | -1,781 |
| Glorieta | 5,658 | -2,847 |
| Clear ForkCLEARFORK | 6,950 | -4,139 |
| Spraberry | 7,876 | -5,065 |
Perforations
Perforated and open-hole intervals.
| From | To | Type |
|---|---|---|
| 8,624 | 19,191 | Perforated |
Casing
Strings as reported, shallowest first.
| Casing in | Set at | Hole in | Cement |
|---|---|---|---|
| 13.375 | 1,586 | 17.5 | 1,200 S |
| 8.625 | 5,755 | 9.875 | 975 S |
| 5.5 | 19,233 | 7.875 | 1,915 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 | Oct 15, 2026 | Aug 4, 2026 | — |
| 00 | Mar 31, 2026 | Feb 18, 2026 | 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 42-329-47127 → W-2, G-1, plugging reports, as PDFs
- Completion packets for 42-329-47127 → 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 neighbours, subsea-aligned so they line up regardless of surface terrain.
Mask HZ Unit42-329-47129
0.0 KM · COG Operating LLC · Section with this well →
| Santa Rosa | 1,157 | 1,654 |
| Rustler | 1,854 | 957 |
| Yates | 2,828 | -17 |
| Seven Rivers | 3,197 | -386 |
| Queen | 3,589 | -778 |
| Grayburg | 4,063 | -1,252 |
| San Andres | 4,593 | -1,782 |
| Glorieta | 5,665 | -2,854 |
10 TOPS · FIRST 8
Mask HZ Unit42-329-47132
0.0 KM · COG Operating LLC · Section with this well →
| Santa Rosa | 1,157 | 1,654 |
| Rustler | 1,854 | 957 |
| Yates | 2,829 | -18 |
| Seven Rivers | 3,197 | -386 |
| Queen | 3,589 | -778 |
| Grayburg | 4,063 | -1,252 |
| San Andres | 4,593 | -1,782 |
| Glorieta | 5,669 | -2,858 |
10 TOPS · FIRST 8
Mask HZ Unit42-329-47131
0.0 KM · COG Operating LLC · Section with this well →
| Santa Rosa | 1,157 | 1,654 |
| Rustler | 1,854 | 957 |
| Yates | 2,830 | -19 |
| Seven Rivers | 3,198 | -387 |
| Queen | 3,590 | -779 |
| Grayburg | 4,065 | -1,254 |
| San Andres | 4,593 | -1,782 |
| Glorieta | 5,671 | -2,860 |
10 TOPS · FIRST 8
Mask HZ Unit42-329-47128
0.1 KM · COG Operating LLC · Section with this well →
| Santa Rosa | 1,157 | 1,654 |
| Rustler | 1,854 | 957 |
| Yates | 2,826 | -15 |
| Seven Rivers | 3,194 | -383 |
| Queen | 3,586 | -775 |
| Grayburg | 4,058 | -1,247 |
| San Andres | 4,592 | -1,781 |
| Glorieta | 5,659 | -2,848 |
10 TOPS · FIRST 8
Mask HZ Unit42-329-47125
0.2 KM · COG Operating LLC · Section with this well →
| Santa Rosa | 1,154 | 1,657 |
| Rustler | 1,850 | 961 |
| Yates | 2,824 | -13 |
| Seven Rivers | 3,191 | -380 |
| Queen | 3,583 | -772 |
| Grayburg | 4,055 | -1,244 |
| San Andres | 4,591 | -1,780 |
| Glorieta | 5,656 | -2,845 |
11 TOPS · FIRST 8
Mask HZ Unit42-329-47126
0.2 KM · COG Operating LLC · Section with this well →
| Santa Rosa | 1,153 | 1,657 |
| Rustler | 1,849 | 961 |
| Yates | 2,823 | -13 |
| Seven Rivers | 3,191 | -381 |
| Queen | 3,582 | -772 |
| Grayburg | 4,054 | -1,244 |
| San Andres | 4,591 | -1,781 |
| Glorieta | 5,654 | -2,844 |
10 TOPS · FIRST 8
Mask HZ Unit42-329-47124
0.2 KM · COG Operating LLC · Section with this well →
| Santa Rosa | 1,153 | 1,657 |
| Rustler | 1,849 | 961 |
| Yates | 2,823 | -13 |
| Seven Rivers | 3,191 | -381 |
| Queen | 3,582 | -772 |
| Grayburg | 4,054 | -1,244 |
| San Andres | 4,590 | -1,780 |
| Glorieta | 5,652 | -2,842 |
13 TOPS · FIRST 8
Mask HZ Unit42-329-47123
0.2 KM · COG Operating LLC · Section with this well →
| Santa Rosa | 1,153 | 1,657 |
| Rustler | 1,849 | 961 |
| Yates | 2,823 | -13 |
| Seven Rivers | 3,191 | -381 |
| Queen | 3,562 | -752 |
| Grayburg | 4,054 | -1,244 |
| San Andres | 4,590 | -1,780 |
| Glorieta | 5,651 | -2,841 |
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/32947127, documented in the API reference.