TEXAS · WELLS · UPTON COUNTY · KAREN UNIT LEASE · API 42-461-40239 · DISTRICT 6E
Karen Unit #5121AH
Upton County · Spraberry (Trend Area) field · Producing · Horizontal
Karen Unit #5121AH (API 42-461-40239) is a horizontal well in Upton County operated by Cog Operating LLC, completed August 7, 2016 and listed as producing on the RRC schedule.
The RRC has issued one drilling permit, issued November 5, 2015, permitted to 9,180 ft.
Completion filings report 9 formation tops, including Yates, Grayburg, San Andres, Spraberry.
Its lease has reported 699K barrels of oil and 3.04M mcf of gas since August 2016, last reporting volume in April 2026. The lease carries 2 wells, so these are lease totals, not this well alone.
Operator of record
- 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 | COG Operating LLCNov 5, 2015 |
- 9,180
- total depth, ft
- 1
- permits on file
- Nov 5, 2015
- last permit issued
- Aug 7, 2016
- completed
- 699K
- cumulative oil, bbl
- 3.04M
- cumulative gas, mcf
PRODUCTION FROM PDQ LEASE REPORTS · Aug 2016 THROUGH Apr 2026
Regulatory status · RRC wellbore file
- Schedule
- ON SCHEDULE
- Completed
- Aug 7, 2016
- Shut in
- —
- Plugged
- —
Operator's P-5 on the schedule: Active (A)
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 2 wells in total, so volumes are shared.Why →
| Lease | Field | Reporting operator | Wells | Oil, bbl | Gas, mcf | Reported |
|---|---|---|---|---|---|---|
| Karen Unit O-9-19374 | Spraberry (Trend Area) | COG Operating LLC | 2 | 699K | 3.04M | Aug 2016 – Apr 2026 |
Gas, mcf lease total
Last 12 months 168,368 · prior 12 270,428(-38%)
Oil, barrels lease total
Last 12 months 17,232 · prior 12 24,855(-31%)
Chain of custody
Every operator that reported production on this well's lease, in order.
- 1COG Operating LLCAug 2016 → Apr 2026
Permits
| Permit | Type | Operator | Received | Issued | Spud | Depth |
|---|---|---|---|---|---|---|
| 811704-99 | Drill | COG Operating LLC | Nov 4, 2015 | Nov 5, 2015 | Mar 14, 2016 | 10,000 |
Completions
| Completed | Lease | Field | Operator | Status | Depth |
|---|---|---|---|---|---|
| Aug 7, 2016 | Karen Unit O-9-19374 | Spraberry (Trend Area) | COG Operating LLC | Producing | 9,180 |
Formation tops
As filed on W-2/G-1. Subsea from 2,779 ft elevation.Download CSV →
| Formation | MD ft | Subsea |
|---|---|---|
| Yates | 2,566 | 213 |
| Grayburg | 4,618 | -1,839 |
| San AndresSAN ANDRES - SALTWATER FLOW | 4,700 | -1,921 |
| Spraberry | 7,395 | -4,616 |
| Wolfcamp | 8,780 | -6,001 |
| Devonian | — | — |
| Ellenburger | — | — |
| Fusselman | — | — |
| Strawn | — | — |
Perforations
Perforated and open-hole intervals.
| From | To | Type |
|---|---|---|
| 9,403 | 19,170 | Perforated |
Casing
Strings as reported, shallowest first.
| Casing in | Set at | Hole in | Cement |
|---|---|---|---|
| 13.375 | 525 | 17.5 | 520 S |
| 9.625 | 8,641 | 12.25 | 695 S |
| 5.5 | 19,222 | 8.5 | 2,955 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 | Oct 20, 2016 | Sep 19, 2016 | Yes |
Well logs
1 log loaded from the RRC's log index, the latest received Apr 18, 2019. 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 |
|---|---|---|---|---|
| NeutronSpans Wolfcamp | TIFF | 9,384 to 9,386 | Apr 18, 2019 | 41.3 |
"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 42-461-40239 → W-2, G-1, plugging reports, as PDFs
- Completion packets for 42-461-40239 → 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/46140239, documented in the API reference.