TEXAS · WELLS · MIDLAND COUNTY · HEADLEE LEASE · API 42-329-39866 · DISTRICT 7B
Headlee #3912MS
Midland County · Spraberry (Trend Area) field · Shut In · Horizontal
Headlee #3912MS (API 42-329-39866) is a horizontal well in Midland County operated by Cog Operating LLC, completed December 3, 2014 and listed as shut in on the RRC schedule, shut in January 1, 2016.
The RRC has issued one drilling permit, issued October 24, 2014, permitted to 1,660 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, Clear Fork, Glorieta.
Its lease has reported 2.5M barrels of oil and 3.22M mcf of gas since February 2010, last reporting in July 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, LLCOct 24, 2014 |
The sources disagree, which usually means a transfer or a lease-level production filing by a different entity. Petrora goes with the schedule.
- 1,660
- total depth, ft
- 1
- permits on file
- Oct 24, 2014
- last permit issued
- Dec 3, 2014
- completed
- 2.5M
- cumulative oil, bbl
- 3.22M
- cumulative gas, mcf
PRODUCTION FROM PDQ LEASE REPORTS · Feb 2010 THROUGH Jul 2026
Regulatory status · RRC wellbore file
- Schedule
- ON SCHEDULE
- Completed
- Dec 3, 2014
- Shut in
- Jan 1, 2016
- 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 – Jul 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 |
|---|---|---|---|---|---|---|
| 798302-99 | Drill | RSP Permian, LLC | Oct 14, 2014 | Oct 24, 2014 | Nov 30, 2014 | 12,000 |
Completions
| Completed | Lease | Field | Operator | Status | Depth |
|---|---|---|---|---|---|
| Dec 3, 2014 | Headlee O-10-40039 | Spraberry (Trend Area) | COG Operating LLC | Shut In · shut in Jan 1, 2016 | 1,660 |
Formation tops
As filed on W-2/G-1. Subsea from 2,966 ft elevation.Download CSV →
| Formation | MD ft | Subsea |
|---|---|---|
| Santa Rosa | 1,011 | 1,955 |
| Yates | 1,310 | 1,656 |
| Clear ForkCLEARFORK | — | — |
| Glorieta | — | — |
| Grayburg | — | — |
| Queen | — | — |
| San AndresSAN ANDRES - HIGH FLOWS, H2S, CO | — | — |
| Seven Rivers | — | — |
| Spraberry | — | — |
| SpraberrySPRABERRY UPPER-DEAN | — | — |
Casing
Strings as reported, shallowest first.
| Casing in | Set at | Hole in | Cement |
|---|---|---|---|
| 13.375 | 1,660 | 17.5 | 1,465 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. About these reports →
| Suffix | Filed | W-2 / G-1 date | Logs referenced |
|---|---|---|---|
| 00 | Dec 21, 2017 | Sep 6, 2017 | Yes |
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 42-329-39866 → W-2, G-1, plugging reports, as PDFs
- Completion packets for 42-329-39866 → scanned completion filings
Log images are in archives with no per-well link: the RRC's Neubus archive (2004 onward). then paste it into their 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/32939866, documented in the API reference.