TEXAS · WELLS · REEVES COUNTY · BIG CHIEF LEASE · API 42-389-34357 · DISTRICT 7B
Big Chief #4620H
Reeves County · Hoefs T-K (Wolfcamp) field · Producing · Horizontal
Big Chief #4620H (API 42-389-34357) is a horizontal well in Reeves County operated by Scout Energy Management LLC, completed November 11, 2015 and listed as producing on the RRC schedule.
The RRC has issued one drilling permit, issued July 22, 2014, permitted to 10,298 ft.
It was permitted by Cog Operating LLC and has since transferred to Scout Energy Management LLC on the wellbore schedule.
Completion filings report 8 formation tops, including Delaware, Castile, Bell Canyon, Cherry Canyon.
Its lease has reported 8.93M barrels of oil and 16.1M mcf of gas since July 2012, last reporting volume in August 2026. The lease carries 34 wells, so these are lease totals, not this well alone.
Operator of record
Permitted by COG Operating LLC; the EWA schedule now lists a different operator.
- Based in
- Dallas, TX
- P-5 status
- Active – Extension (X)
- P-5 last filed
- Oct 20, 2026
- Permits on file
- 483
- Phone
- (972) 277-1397
SOURCE · RRC EWA WELLBORE SCHEDULE
What each RRC source says
| Wellbore schedule | Scout Energy Management LLC |
| Production reports | Scout Energy Management LLCthrough Aug 2026 |
| Latest permit | COG Operating LLCJul 22, 2014 |
The sources disagree, which usually means a transfer or a lease-level production filing by a different entity. Petrora goes with the schedule.
- 10,298
- total depth, ft
- 1
- permits on file
- Jul 22, 2014
- last permit issued
- Nov 11, 2015
- completed
- 8.93M
- cumulative oil, bbl
- 16.1M
- cumulative gas, mcf
PRODUCTION FROM PDQ LEASE REPORTS · JUL 2012 THROUGH AUG 2026
Regulatory status · RRC wellbore file
- Schedule
- ON SCHEDULE
- Completed
- Nov 11, 2015
- Shut in
- —
- Plugged
- —
Operator's P-5 on the schedule: Active – Extension (X)
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 AUG 2026
Texas reports oil by lease, not by well. These are the lease this well is completed on; they carry 34 wells in total, so volumes are shared.Why →
| Lease | Field | Reporting operator | Wells | Oil, bbl | Gas, mcf | Reported |
|---|---|---|---|---|---|---|
| Big Chief O-10-44043 | Hoefs T-K (Wolfcamp) | Scout Energy Management LLC | 34 | 8.93M | 16.1M | Jul 2012 – Aug 2026 |
Oil, barrels lease total
Last 12 months 411,429 · prior 12 466,923(-12%)
Gas, mcf lease total
Last 12 months 1,590,314 · prior 12 1,145,399(+39%)
Wells named Big Chief
Scout Energy Management LLC's other wells filed under this lease name in Reeves 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.
- 1COG Operating LLCJul 2012 → Feb 2025
- 2Scout Energy Management LLCMar 2025 → Aug 2026
Permits
| Permit | Type | Operator | Received | Issued | Spud | Depth |
|---|---|---|---|---|---|---|
| 788624-99 | Drill | COG Operating LLC | Jun 4, 2014 | Jul 22, 2014 | Aug 24, 2014 | 11,000 |
Completions
| Completed | Lease | Field | Operator | Status | Depth |
|---|---|---|---|---|---|
| Nov 11, 2015 | Big Chief O-10-44043 | Hoefs T-K (Wolfcamp) | Scout Energy Management LLC | Producing | 10,298 |
Formation tops
As filed on W-2/G-1. Subsea from 2,934 ft elevation.Download CSV →
| Formation | MD ft | Subsea |
|---|---|---|
| DelawareFORD-DELAWARE | 2,500 | 434 |
| CastileCASTILLE | 2,800 | 134 |
| Bell Canyon | 4,800 | -1,866 |
| Delaware | 5,201 | -2,267 |
| Cherry Canyon | 5,998 | -3,064 |
| DelawareDELAWARE CONSOLIDATED GAS | 6,500 | -3,566 |
| Bone SpringBONE SPRINGS | 7,998 | -5,064 |
| Wolfcamp | 10,133 | -7,199 |
| Pennsylvanian | — | — |
| Permian (undifferentiated)PERMIAN | — | — |
Perforations
Perforated and open-hole intervals.
| From | To | Type |
|---|---|---|
| 10,443 | 16,000 | Perforated |
Casing
Strings as reported, shallowest first.
| Casing in | Set at | Hole in | Cement |
|---|---|---|---|
| 13.375 | 1,665 | 17.5 | 1,610 S |
| 9.625 | 5,235 | 12.25 | 1,590 S |
| 7 | 11,020 | 8.75 | 725 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 | Jun 15, 2026 | Apr 9, 2026 | — |
| 00 | Jan 21, 2016 | Jan 6, 2016 | Yes |
Well logs
1 log loaded from the RRC's log index, the latest received Jul 23, 2018. Cement bond. 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 |
|---|---|---|---|---|
| Cement BondSpans Castile, Bell Canyon, Cherry Canyon, Bone Spring, Wolfcamp | TIFF | 3,200 to 10,977 | Jul 23, 2018 | 8.36 |
"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 42-389-34357 → W-2, G-1, plugging reports, as PDFs
- Completion packets for 42-389-34357 → scanned completion filings
The logs loaded for this well are under Well logs, with the RRC's log search for it. The University Lands library has no per-well link: then paste it into its 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/38934357, documented in the API reference.