WELL · 42-461-36491 · DISTRICT 7
Ross #4803
Upton County · Spraberry (Trend Area) field · Vertical
Ross #4803 (API 42-461-36491) is a plugged well in Upton County, plugged January 20, 2025, last operated by Cog Operating LLC.
The RRC has issued one drilling permit (amended once), issued December 15, 2009, permitted to 13,000 ft.
It was permitted by Endeavor Energy Resources L.P. and has since transferred to Cog Operating LLC on the wellbore schedule.
Completion filings report 4 formation tops, including Spraberry, Wolfcamp, Strawn, Devonian.
Its lease has reported 106K barrels of oil and 607K mcf of gas since May 2006, last reporting in July 2026. The lease carries 3 wells, so these are lease totals, not this well alone.
Operator of record
Permitted by Endeavor Energy Resources L.P.; 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 Jan 2025 |
| Latest permit | Endeavor Energy Resources L.P.Dec 15, 2009 |
The sources disagree, which usually means a transfer or a lease-level production filing by a different entity. Petrora goes with the schedule.
- 13,000
- total depth, ft
- 2
- permits on file
- Dec 15, 2009
- last permit issued
- Apr 7, 2010
- completed
- 106K
- cumulative oil, bbl
- 607K
- cumulative gas, mcf
PRODUCTION FROM PDQ LEASE REPORTS · May 2006 THROUGH Jul 2026
Regulatory status · RRC wellbore file
- Schedule
- OFF SCHEDULE
- Completed
- Apr 7, 2010
- Shut in
- —
- Plugged
- Jan 20, 2025
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 3 wells in total, so volumes are shared.Why →
| Lease | Field | Reporting operator | Wells | Oil, bbl | Gas, mcf | Reported |
|---|---|---|---|---|---|---|
| Ross O-9-16067 | Spraberry (Trend Area) | COG Operating LLC | 3 | 106K | 607K | May 2006 – Jul 2026 |
Oil, barrels lease total
Last 12 months 0 · prior 12 846(-100%)
Gas, mcf lease total
Last 12 months 0 · prior 12 3,578(-100%)
Chain of custody
Every operator that reported production on this well's lease, in order.
- 1LCX Energy, LLCMay 2006 → Sep 2009
- 2Endeavor Energy Resources L.P.Oct 2009 → Jul 2015
- 3COG Operating LLCAug 2015 → Jul 2024
Permits
| Permit | Type | Operator | Received | Issued | Spud | Depth |
|---|---|---|---|---|---|---|
| 688430-98 | Drill | Endeavor Energy Resources L.P. | Jun 17, 2010 | Dec 15, 2009 | Feb 11, 2010 | 13,000 |
| 688430-99 | Drill | Endeavor Energy Resources L.P. | Dec 9, 2009 | Dec 15, 2009 | Feb 11, 2010 | 12,000 |
Completions
| Completed | Lease | Field | Operator | Status | Depth |
|---|---|---|---|---|---|
| Apr 7, 2010 | Ross O-9-16067 | Spraberry (Trend Area) | COG Operating LLC | Plugged | — |
Formation tops
As filed on W-2/G-1. Subsea from 2,811 ft elevation.Download CSV →
Perforations
Perforated and open-hole intervals.
| From | To | Type |
|---|---|---|
| 9,182 | 10,703 | Perforated |
Casing
Strings as reported, shallowest first.
| Casing in | Set at | Hole in | Cement |
|---|---|---|---|
| 13.375 | 410 | 17.5 | 425 S |
| 8.625 | 5,293 | 11 | 600 S |
| 5.5 | 12,700 | 7.875 | 1,645 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 | Apr 2, 2011 | Aug 17, 2010 | 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 42-461-36491 → W-2, G-1, plugging reports, as PDFs
- Completion packets for 42-461-36491 → 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/46136491, documented in the API reference.