TEXAS · WELLS · MIDLAND COUNTY · SPANISH TRAIL LEASE · API 42-329-39115 · DISTRICT 7B
Spanish Trail #104
Midland County · Spraberry (Trend Area) field · Vertical
- Fields on the latest permit · any of 3
- Spraberry (Trend Area) · Spraberry (Trend Area Strawn) · Sta (Atoka)
- Not one formation; the well must be completed in one of them, and no target formation is stated.
Spanish Trail #104 (API 42-329-39115) is a plugged well in Midland County, plugged October 27, 2025, last operated by Cog Operating LLC.
The RRC has issued one drilling permit, issued February 21, 2014, permitted to 12,000 ft.
It was permitted by Rsp Permian, LLC and has since transferred to Cog Operating LLC on the wellbore schedule.
Completion filings report 9 formation tops, including Santa Rosa, Yates, Seven Rivers, Queen.
Its lease has reported 8.27M barrels of oil and 12.6M mcf of gas since June 2008, last reporting volume in April 2026. The lease carries 89 wells, so these are lease totals, not this well alone.
Operator of record
Permitted by RSP Permian, LLC; 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 | RSP Permian, LLCFeb 21, 2014 |
The sources disagree, which usually means a transfer or a lease-level production filing by a different entity. Petrora goes with the schedule.
- 12,000
- total depth, ft
- 1
- permits on file
- Feb 21, 2014
- last permit issued
- Aug 21, 2014
- completed
- 8.27M
- cumulative oil, bbl
- 12.6M
- cumulative gas, mcf
PRODUCTION FROM PDQ LEASE REPORTS · Jun 2008 THROUGH Apr 2026
Regulatory status · RRC wellbore file
- Schedule
- OFF SCHEDULE
- Completed
- Aug 21, 2014
- Shut in
- —
- Plugged
- Oct 27, 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 89 wells in total, so volumes are shared.Why →
| Lease | Field | Reporting operator | Wells | Oil, bbl | Gas, mcf | Reported |
|---|---|---|---|---|---|---|
| Spanish Trail O-10-38844 | Spraberry (Trend Area) | COG Operating LLC | 89 | 8.27M | 12.6M | Jun 2008 – Apr 2026 |
Oil, barrels lease total
Last 12 months 45,589 · prior 12 53,332(-15%)
Gas, mcf lease total
Last 12 months 166,992 · prior 12 210,661(-21%)
Chain of custody
Every operator that reported production on this well's lease, in order.
- 1E.G.L. Resources, Inc.Jun 2008 → Aug 2013
- 2RSP Permian, LLCSep 2013 → Jul 2018
- 3COG Operating LLCAug 2018 → Apr 2026
Permits
| Permit | Type | Operator | Received | Issued | Spud | Depth |
|---|---|---|---|---|---|---|
| 776920-99 | Drill | RSP Permian, LLC | Jan 9, 2014 | Feb 21, 2014 | Jun 6, 2014 | 12,000 |
Completions
| Completed | Lease | Field | Operator | Status | Depth |
|---|---|---|---|---|---|
| Aug 21, 2014 | Spanish Trail O-10-38844 | Spraberry (Trend Area) | COG Operating LLC | Plugged | — |
Formation tops
As filed on W-2/G-1. Subsea from 2,855 ft elevation.Download CSV →
| Formation | MD ft | Subsea |
|---|---|---|
| Santa Rosa | 1,036 | 1,819 |
| Yates | 2,878 | -23 |
| Seven Rivers | 3,140 | -285 |
| Queen | 3,385 | -530 |
| Grayburg | 3,834 | -979 |
| San AndresSAN ANDRES - HIGH FLOWS, H2S, CO | 4,560 | -1,705 |
| Glorieta | 5,201 | -2,346 |
| Clear ForkCLEARFORK | 7,140 | -4,285 |
| Spraberry | 8,025 | -5,170 |
| SpraberrySPRABERRY UPPER-DEAN | 9,420 | -6,565 |
Perforations
Perforated and open-hole intervals.
| From | To | Type |
|---|---|---|
| 8,170 | 10,890 | Perforated |
Casing
Strings as reported, shallowest first.
| Casing in | Set at | Hole in | Cement |
|---|---|---|---|
| 13.375 | 375 | 17.5 | 400 S |
| 8.625 | 5,714 | 11 | 850 S |
| 5.5 | 11,200 | 7.875 | 1,050 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 7, 2015 | Feb 9, 2015 | Yes |
Well logs
1 log loaded from the RRC's log index, the latest received Sep 1, 2015. 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 San Andres, Glorieta, Clear Fork, Spraberry | TIFF | 4,800 to 11,075 | Sep 1, 2015run Jun 24, 2014 | 4.94 |
"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 42-329-39115 → W-2, G-1, plugging reports, as PDFs
- Completion packets for 42-329-39115 → scanned completion filings
The logs loaded for this well are under Well logs, with the RRC's log search for it.
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/32939115, documented in the API reference.