TEXAS · WELLS · MIDLAND COUNTY · HEADLEE LEASE · API 42-329-39118 · DISTRICT 7B
Headlee #3505LS
Midland County · Spraberry (Trend Area) field · Shut In · Horizontal
Headlee #3505LS (API 42-329-39118) is a horizontal well in Midland County operated by Cog Operating LLC, completed June 4, 2014 and listed as shut in on the RRC schedule, shut in April 1, 2026.
The RRC has issued one drilling permit, issued January 27, 2014, permitted to 9,350 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 Yates, Seven Rivers, Queen, Grayburg.
Its lease has reported 2.5M barrels of oil and 3.22M mcf of gas since February 2010, last reporting volume in April 2026. The lease carries 19 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, LLCJan 27, 2014 |
The sources disagree, which usually means a transfer or a lease-level production filing by a different entity. Petrora goes with the schedule.
- 9,350
- total depth, ft
- 1
- permits on file
- Jan 27, 2014
- last permit issued
- Jun 4, 2014
- completed
- 2.5M
- cumulative oil, bbl
- 3.22M
- cumulative gas, mcf
PRODUCTION FROM PDQ LEASE REPORTS · Feb 2010 THROUGH Apr 2026
Regulatory status · RRC wellbore file
- Schedule
- ON SCHEDULE
- Completed
- Jun 4, 2014
- Shut in
- Apr 1, 2026
- 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 19 wells in total, so volumes are shared.Why →
| Lease | Field | Reporting operator | Wells | Oil, bbl | Gas, mcf | Reported |
|---|---|---|---|---|---|---|
| Headlee O-10-40039 | Spraberry (Trend Area) | COG Operating LLC | 19 | 2.5M | 3.22M | Feb 2010 – Apr 2026 |
Oil, barrels lease total
Last 12 months 89,420 · prior 12 94,289(-5%)
Gas, mcf lease total
Last 12 months 198,435 · prior 12 192,489(+3%)
Chain of custody
Every operator that reported production on this well's lease, in order.
- 1Patriot Resources, Inc.Feb 2010 → Jan 2011
- 2RSP Permian, LLCFeb 2011 → Jul 2018
- 3COG Operating LLCAug 2018 → Apr 2026
Permits
| Permit | Type | Operator | Received | Issued | Spud | Depth |
|---|---|---|---|---|---|---|
| 777013-99 | Drill | RSP Permian, LLC | Jan 10, 2014 | Jan 27, 2014 | Feb 25, 2014 | 12,000 |
Completions
| Completed | Lease | Field | Operator | Status | Depth |
|---|---|---|---|---|---|
| Jun 4, 2014 | Headlee O-10-40039 | Spraberry (Trend Area) | COG Operating LLC | Shut In · shut in Apr 1, 2026 | 9,350 |
Formation tops
As filed on W-2/G-1. Subsea from 2,972 ft elevation.Download CSV →
| Formation | MD ft | Subsea |
|---|---|---|
| Yates | 3,117 | -145 |
| Seven Rivers | 3,425 | -453 |
| Queen | 4,232 | -1,260 |
| Grayburg | 4,692 | -1,720 |
| San AndresSAN ANDRES - HIGH FLOWS, H2S, CO | 4,855 | -1,883 |
| Clear ForkCLEARFORK | 7,544 | -4,572 |
| Spraberry | 8,383 | -5,411 |
| SpraberrySPRABERRY UPPER-DEAN | 8,883 | -5,911 |
| Glorieta | — | — |
| Santa Rosa | — | — |
Perforations
Perforated and open-hole intervals.
| From | To | Type |
|---|---|---|
| 9,699 | 14,791 | Perforated |
Casing
Strings as reported, shallowest first.
| Casing in | Set at | Hole in | Cement |
|---|---|---|---|
| 13.375 | 417 | 17.5 | 425 S |
| 9.625 | 8,617 | 12.25 | 820 S |
| 5.5 | 14,892 | 8.5 | 1,685 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 31, 2015 | Aug 4, 2015 | Yes |
Well logs
1 log loaded from the RRC's log index, the latest received Jan 26, 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 Yates, Seven Rivers, Queen, Grayburg, San Andres, Clear Fork, Spraberry | TIFF | 0 to 8,930 | Jan 26, 2016run Apr 26, 2014 | 4.83 |
"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 42-329-39118 → W-2, G-1, plugging reports, as PDFs
- Completion packets for 42-329-39118 → 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/32939118, documented in the API reference.