TEXAS · WELLS · MIDLAND COUNTY · API 42-329-39303 · DISTRICT 7B
Spanish Trail HZ Unit #218MS
Midland County · Spraberry (Trend Area) field · Producing · Horizontal
Spanish Trail HZ Unit #218MS (API 42-329-39303) is a horizontal well in Midland County operated by Cog Operating LLC, completed October 15, 2014 and listed as producing on the RRC schedule.
The RRC has issued one drilling permit, issued May 12, 2014, permitted to 8,471 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, LLCMay 12, 2014 |
The sources disagree, which usually means a transfer or a lease-level production filing by a different entity. Petrora goes with the schedule.
- 8,471
- total depth, ft
- 1
- permits on file
- May 12, 2014
- last permit issued
- Oct 15, 2014
- 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
- Oct 15, 2014
- 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.
Wells nearby
Every well with a location on file around this well, in any state, nearest first.
Texas locations come from drilling permits, so most older Texas wells have none and are not listed.
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%)
Wells named Spanish Trail HZ Unit
COG Operating LLC's other wells filed under this lease name in Midland County, newest permit first. The RRC gives a gas well its own lease number, so the name is what joins the wells of a unit.
Loading the lease's wellsChain 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 |
|---|---|---|---|---|---|---|
| 783053-99 | Drill | RSP Permian, LLC | Mar 25, 2014 | May 12, 2014 | Jun 21, 2014 | 12,000 |
Completions
| Completed | Lease | Field | Operator | Status | Depth |
|---|---|---|---|---|---|
| Oct 15, 2014 | Spanish Trail HZ Unit O-10-51948 | Spraberry (Trend Area) | COG Operating LLC | Producing | 8,471 |
| Oct 15, 2014 | 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 2,868 ft elevation.Download CSV →
| Formation | MD ft | Subsea |
|---|---|---|
| Santa Rosa | 1,110 | 1,758 |
| Yates | 2,910 | -42 |
| Seven Rivers | 3,231 | -363 |
| Queen | 3,994 | -1,126 |
| Grayburg | 4,664 | -1,796 |
| San AndresSAN ANDRES - HIGH FLOWS, H2S, CO | 5,218 | -2,350 |
| Clear ForkCLEARFORK | 7,177 | -4,309 |
| Spraberry | 8,006 | -5,138 |
| Glorieta | — | — |
| SpraberrySPRABERRY UPPER-DEAN | — | — |
Perforations
Perforated and open-hole intervals.
| From | To | Type |
|---|---|---|
| 8,517 | 18,402 | Perforated |
Casing
Strings as reported, shallowest first.
| Casing in | Set at | Hole in | Cement |
|---|---|---|---|
| 13.375 | 1,585 | 17.5 | 1,165 S |
| 9.625 | 8,161 | 12.25 | 600 S |
| 5.5 | 18,599 | 8.5 | 2,800 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 | Nov 19, 2015 | Yes |
| 00 | Dec 15, 2015 | Nov 19, 2015 | Yes |
Well logs
1 log loaded from the RRC's log index, the latest received Aug 30, 2016. 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 Santa Rosa, Yates, Seven Rivers, Queen, Grayburg, San Andres, Clear Fork, Spraberry | 2 TIFF | 200 to 8,009 | Aug 30, 2016run Aug 26, 2014 | 6.53 + 6.51 |
"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 42-329-39303 → W-2, G-1, plugging reports, as PDFs
- Completion packets for 42-329-39303 → 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/32939303, documented in the API reference.