TEXAS · WELLS · UPTON COUNTY · TXL "39" LEASE · API 42-461-37645 · DISTRICT 6E
TXL 39 #1
Upton County · Spraberry (Trend Area) field · Vertical
- Fields on the latest permit · any of 2
- Davis (Pennsylvanian) · Spraberry (Trend Area)
- Not one formation; the well must be completed in one of them, and no target formation is stated.
Txl 39 #1 (API 42-461-37645) is a plugged well in Upton County, plugged October 4, 2025, last operated by Cog Operating LLC.
The RRC has issued one drilling permit (amended twice), issued September 15, 2011, permitted to 12,000 ft.
Completion filings report 7 formation tops, including Spraberry, Dean, Wolfcamp, L. Wolfcamp.
Its lease has reported 595K barrels of oil and 4.05M mcf of gas since October 2011, last reporting volume in April 2026. The lease carries 10 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 LLCSep 15, 2011 |
- 12,000
- total depth, ft
- 3
- permits on file
- Sep 15, 2011
- last permit issued
- Feb 22, 2012
- completed
- 595K
- cumulative oil, bbl
- 4.05M
- cumulative gas, mcf
PRODUCTION FROM PDQ LEASE REPORTS · Oct 2011 THROUGH Apr 2026
Regulatory status · RRC wellbore file
- Schedule
- OFF SCHEDULE
- Completed
- Feb 22, 2012
- Shut in
- —
- Plugged
- Oct 4, 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 10 wells in total, so volumes are shared.Why →
| Lease | Field | Reporting operator | Wells | Oil, bbl | Gas, mcf | Reported |
|---|---|---|---|---|---|---|
| TXL "39" O-9-17715 | Spraberry (Trend Area) | COG Operating LLC | 10 | 595K | 4.05M | Oct 2011 – Apr 2026 |
Gas, mcf lease total
Last 12 months 133,391 · prior 12 80,263(+66%)
Oil, barrels lease total
Last 12 months 11,793 · prior 12 12,709(-7%)
Chain of custody
Every operator that reported production on this well's lease, in order.
- 1COG Operating LLCOct 2011 → Apr 2026
Permits
| Permit | Type | Operator | Received | Issued | Spud | Depth |
|---|---|---|---|---|---|---|
| 723794-97 | Drill | COG Operating LLC | Apr 8, 2013 | Sep 15, 2011 | Nov 17, 2011 | 12,000 |
| 723794-98 | Drill | COG Operating LLC | Oct 24, 2011 | Sep 15, 2011 | — | 12,000 |
| 723794-99 | Drill | COG Operating LLC | Sep 7, 2011 | Sep 15, 2011 | Nov 17, 2011 | 10,500 |
Completions
| Completed | Lease | Field | Operator | Status | Depth |
|---|---|---|---|---|---|
| Feb 22, 2012 | TXL 39 O-9-17715 | Spraberry (Trend Area) | COG Operating LLC | Plugged | — |
Formation tops
As filed on W-2/G-1. Subsea from 2,839 ft elevation.Download CSV →
Perforations
Perforated and open-hole intervals.
| From | To | Type |
|---|---|---|
| 7,790 | 11,050 | Perforated |
Casing
Strings as reported, shallowest first.
| Casing in | Set at | Hole in | Cement |
|---|---|---|---|
| 9.625 | 820 | 12.25 | 430 S |
| 5.5 | 11,230 | 7.875 | 758 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 | Apr 30, 2013 | Mar 30, 2012 | Yes |
Well logs
1 log loaded from the RRC's log index, the latest received Dec 17, 2014. 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, Dean, Wolfcamp, L. Wolfcamp, B. Wolfcamp, Strawn, Bend | TIFF | 4,000 to 11,176 | Dec 17, 2014run Dec 21, 2011 | 3.84 |
"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 42-461-37645 → W-2, G-1, plugging reports, as PDFs
- Completion packets for 42-461-37645 → 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/46137645, documented in the API reference.