WELL · 42-227-40695 · DISTRICT 8
Masters Unit #4AH
Howard County · Spraberry (Trend Area) field · Producing · Horizontal
Masters Unit #4AH (API 42-227-40695) is a horizontal well in Howard County operated by Apache Corporation, completed December 7, 2020 and listed as producing on the RRC schedule.
The RRC has issued one drilling permit (amended once), issued April 15, 2020, permitted to 8,500 ft.
It was permitted by Callon Petroleum Operating CO and has since transferred to Apache Corporation on the wellbore schedule.
Completion filings report 10 formation tops, including Santa Rosa, Yates, Seven Rivers, San Andres.
Its lease has reported 2.23M barrels of oil and 5.41M mcf of gas since November 2015, last reporting in July 2026. The lease carries 8 wells, so these are lease totals, not this well alone.
Operator of record
Permitted by Callon Petroleum Operating Co; the EWA schedule now lists a different operator.
Houston, TX · P-5 Y, filed Oct 4, 2025 · 9,754 permits on file · (713) 296-6400
SOURCE · RRC EWA WELLBORE SCHEDULE
What each RRC source says
| Wellbore schedule | Apache Corporation |
| Production reports | Apache Corporationthrough Apr 2026 |
| Latest permit | Callon Petroleum Operating CoApr 15, 2020 |
The sources disagree, which usually means a transfer or a lease-level production filing by a different entity. Petrora goes with the schedule.
- 8,500
- total depth, ft
- 2
- permits on file
- Apr 15, 2020
- last permit issued
- Dec 7, 2020
- completed
- 2.23M
- cumulative oil, bbl
- 5.41M
- cumulative gas, mcf
PRODUCTION FROM PDQ LEASE REPORTS · Nov 2015 THROUGH Jul 2026
Regulatory status · RRC wellbore file
- Schedule
- ON SCHEDULE
- Completed
- Dec 7, 2020
- Shut in
- —
- Plugged
- —
Operator's P-5 on the schedule: Active
Surface location
32.281092, -101.501595
OpenStreetMap → · Google Maps →
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 8 wells in total, so volumes are shared.Why →
| Lease | Field | Reporting operator | Wells | Oil, bbl | Gas, mcf | Reported |
|---|---|---|---|---|---|---|
| Masters Unit O-10-47823 | Spraberry (Trend Area) | Apache Corporation | 8 | 2.23M | 5.41M | Nov 2015 – Jul 2026 |
Gas, mcf lease total
Last 12 months 262,242 · prior 12 712,852(-63%)
Oil, barrels lease total
Last 12 months 50,842 · prior 12 105,418(-52%)
Chain of custody
Every operator that reported production on this well's lease, in order.
- 1Big Star Oil & Gas, LLCNov 2015 → May 2016
- 2Callon Petroleum Operating CoJun 2016 → Jul 2024
- 3Apache CorporationAug 2024 → Apr 2026
Permits
| Permit | Type | Operator | Received | Issued | Spud | Depth |
|---|---|---|---|---|---|---|
| 863321-98 | Drill | Callon Petroleum Operating Co | May 26, 2020 | Apr 15, 2020 | Sep 20, 2020 | 8,500 |
| 863321-99 | Drill | Callon Petroleum Operating Co | Apr 14, 2020 | Apr 15, 2020 | Sep 20, 2020 | 8,500 |
Completions
| Completed | Lease | Field | Operator | Status | Depth |
|---|---|---|---|---|---|
| — | — O-10-47823 | — | — | — | — |
Formation tops
As filed on W-2/G-1. Download CSV →
| Formation | MD ft |
|---|---|
| Santa Rosa | 550 |
| Yates | 1,655 |
| Seven Rivers | 1,760 |
| San AndresSAN ANDRES - HIGH FLOWS, H2S, CO | 3,045 |
| Glorieta | 4,075 |
| Clear ForkCLEARFORK - SEVERE WATER FLOWS | 5,245 |
| Spraberry | 5,970 |
| Leonard | 6,970 |
| Dean | 7,266 |
| Rustler | — |
Perforations
Perforated and open-hole intervals.
| From | To | Type |
|---|---|---|
| 7,500 | 17,514 | Perforated |
Casing
Strings as reported, shallowest first.
| Casing in | Set at | Hole in | Cement |
|---|---|---|---|
| 13.375 | 1,114 | 17.5 | 712 S |
| 9.625 | 6,982 | 12.25 | 559 S |
| 7 | 7,932 | 8.75 | 2,745 S |
| 5.5 | 17,640 | 8.5 | 2,745 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 | Mar 22, 2021 | Mar 14, 2021 | 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 42-227-40695 → W-2, G-1, plugging reports, as PDFs
- Completion packets for 42-227-40695 → 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.
Masters Unit42-227-40697
0.0 KM · Callon Petroleum Operating Co · Section with this well →
| Santa Rosa | 550 | |
| Yates | 1,655 | |
| Seven Rivers | 1,760 | |
| San Andres | 3,045 | |
| Glorieta | 4,075 | |
| Clear Fork | 5,245 | |
| Spraberry | 5,970 | |
| Leonard | 6,970 |
10 TOPS · FIRST 8
Masters Unit42-227-40696
0.0 KM · Callon Petroleum Operating Co · Section with this well →
| Santa Rosa | 550 | |
| Yates | 1,655 | |
| Seven Rivers | 1,760 | |
| San Andres | 3,045 | |
| Glorieta | 4,075 | |
| Clear Fork | 5,245 | |
| Spraberry | 5,970 | |
| Leonard | 6,970 |
10 TOPS · FIRST 8
Masters Unit42-227-40078
0.1 KM · Callon Petroleum Operating Co · Section with this well →
| Yates | 1,660 | |
| Seven Rivers | 1,765 | |
| Glorieta | 2,355 | |
| San Andres | 3,050 | |
| Clear Fork | 5,250 | |
| Spraberry | 5,975 | |
| Leonard | 6,974 | |
| Dean | 7,259 |
10 TOPS · FIRST 8
Masters Unit42-227-40077
0.1 KM · Callon Petroleum Operating Co · Section with this well →
| Yates | 1,660 | |
| Seven Rivers | 1,765 | |
| San Andres | 3,050 | |
| Glorieta | 4,080 | |
| Clear Fork | 5,250 | |
| Spraberry | 5,975 | |
| Leonard | 6,971 | |
| Wolfcamp | — |
10 TOPS · FIRST 8
Masters Unit42-227-40086
0.1 KM · Callon Petroleum Operating Co · Section with this well →
| Yates | 1,660 | |
| Seven Rivers | 1,765 | |
| San Andres | 3,050 | |
| Glorieta | 4,080 | |
| Clear Fork | 5,250 | |
| Spraberry | 5,975 | |
| Leonard | 6,986 | |
| Dean | 7,264 |
10 TOPS · FIRST 8
Masters Unit42-227-40085
0.1 KM · Callon Petroleum Operating Co · Section with this well →
| Yates | 1,660 | |
| Seven Rivers | 1,765 | |
| San Andres | 3,050 | |
| Glorieta | 4,080 | |
| Clear Fork | 5,250 | |
| Spraberry | 5,975 | |
| Leonard | 6,970 | |
| Coleman Junction | — |
10 TOPS · FIRST 8
Ryder Unit42-227-40588
0.9 KM · Callon Petroleum Operating Co · Section with this well →
| Santa Rosa | 540 | |
| Yates | 1,685 | |
| Seven Rivers | 1,795 | |
| San Andres | 3,100 | |
| Glorieta | 4,105 | |
| Clear Fork | 5,250 | |
| Spraberry | 6,060 | |
| Leonard | 6,960 |
10 TOPS · FIRST 8
Ryder Unit42-227-40589
0.9 KM · Callon Petroleum Operating Co · Section with this well →
| Santa Rosa | 540 | |
| Yates | 1,685 | |
| Seven Rivers | 1,795 | |
| San Andres | 3,100 | |
| Glorieta | 4,105 | |
| Clear Fork | 5,250 | |
| Spraberry | 6,060 | |
| Leonard | 6,959 |
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/22740695, documented in the API reference.