WELL · 42-461-35731 · DISTRICT 7
AMACKER87 #4
Upton County · Spraberry (Trend Area) field · Producing · Vertical
Amacker87 #4 (API 42-461-35731) is a well in Upton County operated by Cog Operating LLC, completed July 21, 2008 and listed as producing on the RRC schedule.
The RRC has issued one drilling permit, issued March 6, 2008, permitted to 10,800 ft.
It was permitted by Henry Petroleum LP and has since transferred to Cog Operating LLC on the wellbore schedule.
Completion filings report 5 formation tops, including Clear Fork, Spraberry, Wolfcamp, Dean.
Its lease has reported 330K barrels of oil and 973K mcf of gas since July 2004, last reporting in July 2026. The lease carries 6 wells, so these are lease totals, not this well alone.
Operator of record
Permitted by Henry Petroleum LP; the EWA schedule now lists a different operator.
- Based in
- Midland, TX
- P-5 status
- Active – Extension (X)
- P-5 last filed
- Jun 2, 2026
- Permits on file
- 4,568
- Phone
- (432) 683-7443
SOURCE · RRC EWA WELLBORE SCHEDULE
What each RRC source says
| Wellbore schedule | COG Operating LLC |
| Production reports | COG Operating LLCthrough Apr 2026 |
| Latest permit | Henry Petroleum LPMar 6, 2008 |
The sources disagree, which usually means a transfer or a lease-level production filing by a different entity. Petrora goes with the schedule.
- 10,800
- total depth, ft
- 1
- permits on file
- Mar 6, 2008
- last permit issued
- Jul 21, 2008
- completed
- 330K
- cumulative oil, bbl
- 973K
- cumulative gas, mcf
PRODUCTION FROM PDQ LEASE REPORTS · Jul 2004 THROUGH Jul 2026
Regulatory status · RRC wellbore file
- Schedule
- ON SCHEDULE
- Completed
- Jul 21, 2008
- Shut in
- —
- Plugged
- —
Operator's P-5 on the schedule: Active – Extension (X)
Surface location
No coordinates on the permit record yet. The RRC's GIS record usually lands within days of issuance; historical master-file permits never carry one.
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 6 wells in total, so volumes are shared.Why →
| Lease | Field | Reporting operator | Wells | Oil, bbl | Gas, mcf | Reported |
|---|---|---|---|---|---|---|
| AMACKER87 O-9-15548 | Spraberry (Trend Area) | COG Operating LLC | 6 | 330K | 973K | Jul 2004 – Jul 2026 |
Oil, barrels lease total
Last 12 months 3,899 · prior 12 4,704(-17%)
Gas, mcf lease total
Last 12 months 24,183 · prior 12 23,238(+4%)
Chain of custody
Every operator that reported production on this well's lease, in order.
- 1Henry Petroleum LPJul 2004 → Dec 2008
- 2COG Operating LLCJan 2009 → Apr 2026
Permits
| Permit | Type | Operator | Received | Issued | Spud | Depth |
|---|---|---|---|---|---|---|
| 656212-99 | Drill | Henry Petroleum LP | Feb 27, 2008 | Mar 6, 2008 | May 15, 2008 | 10,800 |
Completions
| Completed | Lease | Field | Operator | Status | Depth |
|---|---|---|---|---|---|
| — | — O-9-15548 | — | — | — | — |
Formation tops
As filed on W-2/G-1. Subsea from 2,714 ft elevation.Download CSV →
| Formation | MD ft | Subsea |
|---|---|---|
| Clear ForkCLEARFORK | 6,310 | -3,596 |
| Spraberry | 7,020 | -4,306 |
| Wolfcamp | 8,445 | -5,731 |
| Dean | 8,630 | -5,916 |
| LWR Wolfcamp | 8,830 | -6,116 |
| WolfcampBASE WOLFCAMP | 10,070 | -7,356 |
Perforations
Perforated and open-hole intervals.
| From | To | Type |
|---|---|---|
| 6,540 | 9,610 | Perforated |
Casing
Strings as reported, shallowest first.
| Casing in | Set at | Hole in | Cement |
|---|---|---|---|
| 13.375 | 1,210 | — | 1,000 S |
| 5.5 | 9,770 | — | 950 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 6, 2008 | Aug 15, 2008 | Yes |
| 00 | Sep 8, 2008 | — | — |
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 42-461-35731 → W-2, G-1, plugging reports, as PDFs
- Completion packets for 42-461-35731 → 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.
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/46135731, documented in the API reference.