TEXAS · WELLS · MIDLAND COUNTY · API 42-329-39170 · DISTRICT 7B
Spanish Trail HZ Unit #217WD
Midland County · Spraberry (Trend Area) field · Producing · Horizontal
Spanish Trail HZ Unit #217WD (API 42-329-39170) is a horizontal well in Midland County operated by Cog Operating LLC, completed December 23, 2015 and listed as producing on the RRC schedule.
The RRC has issued one drilling permit, issued March 3, 2014, permitted to 9,620 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 2 leases have reported 10.4M barrels of oil and 18.1M mcf of gas since June 2008, last reporting volume in April 2026. The leases carry 109 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, LLCMar 3, 2014 |
The sources disagree, which usually means a transfer or a lease-level production filing by a different entity. Petrora goes with the schedule.
- 9,620
- total depth, ft
- 1
- permits on file
- Mar 3, 2014
- last permit issued
- Dec 23, 2015
- completed
- 10.4M
- cumulative oil, bbl
- 18.1M
- cumulative gas, mcf
PRODUCTION FROM PDQ LEASE REPORTS · Jun 2008 THROUGH Apr 2026
Regulatory status · RRC wellbore file
- Schedule
- ON SCHEDULE
- Completed
- Dec 23, 2015
- 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 2 leases this well is completed on; they carry 109 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 |
| Spanish Trail HZ Unit O-10-51948 | Spraberry (Trend Area) | COG Operating LLC | 20 | 2.16M | 5.48M | Sep 2018 – Apr 2026 |
Oil, barrels lease total
Last 12 months 249,964 · prior 12 286,532(-13%)
Gas, mcf lease total
Last 12 months 942,784 · prior 12 1,254,395(-25%)
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 |
|---|---|---|---|---|---|---|
| 779190-99 | Drill | RSP Permian, LLC | Feb 6, 2014 | Mar 3, 2014 | Sep 13, 2014 | 12,000 |
Completions
| Completed | Lease | Field | Operator | Status | Depth |
|---|---|---|---|---|---|
| Dec 23, 2015 | Spanish Trail HZ Unit O-10-51948 | Spraberry (Trend Area) | COG Operating LLC | Producing | 9,620 |
| Dec 23, 2015 | Spanish Trail O-10-38844 | Spraberry (Trend Area) | COG Operating LLC | Not on Schedule | — |
Formation tops
As filed on W-2/G-1. Subsea from 2,858 ft elevation.Download CSV →
| Formation | MD ft | Subsea |
|---|---|---|
| Santa Rosa | 1,100 | 1,758 |
| Yates | 2,895 | -37 |
| Seven Rivers | 3,212 | -354 |
| Queen | 4,010 | -1,152 |
| Grayburg | 4,669 | -1,811 |
| San AndresSAN ANDRES - HIGH FLOWS, H2S, CO | 5,099 | -2,241 |
| Clear ForkCLEARFORK | 7,152 | -4,294 |
| Spraberry | 7,982 | -5,124 |
| SpraberrySPRABERRY UPPER-DEAN | 9,286 | -6,428 |
| Glorieta | — | — |
Perforations
Perforated and open-hole intervals.
| From | To | Type |
|---|---|---|
| 9,682 | 16,377 | Perforated |
Casing
Strings as reported, shallowest first.
| Casing in | Set at | Hole in | Cement |
|---|---|---|---|
| 13.375 | 1,576 | 17.5 | 1,295 S |
| 9.625 | 8,965 | 12.25 | 815 S |
| 5.5 | 16,420 | 8.5 | 2,040 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 | Aug 17, 2019 | May 2, 2016 | Yes |
| 00 | May 19, 2016 | May 2, 2016 | Yes |
Well logs
3 logs loaded from the RRC's log index, the latest received Mar 6, 2017. Neutron, Resistivity. 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 Santa Rosa, Yates, Seven Rivers, Queen, Grayburg, San Andres, Clear Fork, Spraberry | TIFF | 0 to 9,700 | Mar 6, 2017run Jul 22, 2015 | 7.37 |
| RESISTIVITYSpans Santa Rosa, Yates, Seven Rivers, Queen, Grayburg, San Andres, Clear Fork, Spraberry | TIFF | 0 to 9,692 | Jan 9, 2017run Jul 22, 2015 | 8.67 |
| NEUTRON POROSITYSpans Santa Rosa, Yates, Seven Rivers, Queen, Grayburg, San Andres, Clear Fork, Spraberry | TIFF | 0 to 9,698 | Oct 17, 2016run Jul 22, 2015 | 6.04 |
"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 42-329-39170 → W-2, G-1, plugging reports, as PDFs
- Completion packets for 42-329-39170 → 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/32939170, documented in the API reference.