TEXAS · WELLS · UPTON COUNTY · ROSS "48A" LEASE · API 42-461-36884 · DISTRICT 6E
Ross 48A #1
Upton County · Spraberry (Trend Area) field · Vertical
Ross 48a #1 (API 42-461-36884) is a plugged well in Upton County, plugged April 10, 2024, last operated by Cog Operating LLC.
The RRC has issued one drilling permit (amended once), issued August 4, 2010, 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 3 formation tops, including Spraberry, Strawn, Devonian.
Its lease has reported 33.6K barrels of oil and 202K mcf of gas since January 2011, with no volume in the three years through April 2026.
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 Aug 2022 |
| Latest permit | Endeavor Energy Resources L.P.Aug 4, 2010 |
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
- Aug 4, 2010
- last permit issued
- Oct 29, 2020
- completed
- 33.6K
- cumulative oil, bbl
- 202K
- cumulative gas, mcf
PRODUCTION FROM PDQ LEASE REPORTS · Jan 2011 THROUGH Aug 2022
Regulatory status · RRC wellbore file
- Schedule
- OFF SCHEDULE
- Completed
- Oct 29, 2020
- Shut in
- —
- Plugged
- Apr 10, 2024
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; this well is the only one on it.Why →
| Lease | Field | Reporting operator | Wells | Oil, bbl | Gas, mcf | Reported |
|---|---|---|---|---|---|---|
| Ross "48A" O-9-17471 | Spraberry (Trend Area) | COG Operating LLC | 1 | 33.6K | 202K | Jan 2011 – Aug 2022 |
No volumes reported on these leases in the last three years.
Chain of custody
Every operator that reported production on this well's lease, in order.
- 1Endeavor Energy Resources L.P.Jan 2011 → Jul 2015
- 2COG Operating LLCAug 2015 → Aug 2022
Permits
| Permit | Type | Operator | Received | Issued | Spud | Depth |
|---|---|---|---|---|---|---|
| 700156-98 | Drill | Endeavor Energy Resources L.P. | Sep 1, 2010 | Aug 4, 2010 | Sep 3, 2010 | 13,000 |
| 700156-99 | Drill | Endeavor Energy Resources L.P. | Aug 3, 2010 | Aug 4, 2010 | Sep 3, 2010 | 12,000 |
Completions
| Completed | Lease | Field | Operator | Status | Depth |
|---|---|---|---|---|---|
| Oct 29, 2020 | Ross 48A O-9-17471 | Spraberry (Trend Area) | COG Operating LLC | Plugged | — |
Formation tops
As filed on W-2/G-1. Subsea from 2,815 ft elevation.Download CSV →
Perforations
Perforated and open-hole intervals.
| From | To | Type |
|---|---|---|
| 9,191 | 10,449 | Perforated |
Casing
Strings as reported, shallowest first.
| Casing in | Set at | Hole in | Cement |
|---|---|---|---|
| 13.375 | 398 | 17.5 | 425 S |
| 8.625 | 5,328 | 11 | 625 S |
| 5.5 | 12,684 | 7.875 | 1,465 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. The record date is the RRC's own date on the record, not the day the report was filed: 462,034 of the state's filings carry 1984-01-12. About these reports →
| Suffix | RRC record date | W-2 / G-1 date | Logs referenced |
|---|---|---|---|
| 00 | Nov 30, 2020 | Nov 17, 2020 | — |
| 00 | Apr 10, 2012 | Jan 27, 2011 | Yes |
Well logs
1 log loaded from the RRC's log index, the latest received Sep 9, 2013. Neutron. These are the logs loaded into Petrora from the Railroad Commission's inventories, not necessarily every log run on the well. The RRC holds the files; each opens from its log search for the well. The kind is the RRC's description of the log; the interval is the one filed for it.
Open the RRC's log search for this well ↗| Logas described | Files | Intervalft, as filed | Datereceived | SizeMB |
|---|---|---|---|---|
| NEUTRON POROSITYSpans Spraberry, Strawn, Devonian | TIFF | 6,140 to 12,603 | Sep 9, 2013run Oct 20, 2010 | 5.87 |
"Spans" is by this well's own filed formation tops: a formation runs from its top to the next deeper top filed, and the deepest runs to the bottom of the log. Depths are measured along the wellbore, so on a horizontal the lateral counts in the formation it was landed in.
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 42-461-36884 → W-2, G-1, plugging reports, as PDFs
- Completion packets for 42-461-36884 → scanned completion filings
The logs loaded for this well are under Well logs, with the RRC's log search for it. The University Lands library has no per-well link: then paste it into its 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/46136884, documented in the API reference.