WELL · 42-497-36046 · DISTRICT 9
Cox J. R. GU #4
Wise County · Newark East (Barnett Shale) field · Horizontal
Cox J. R. GU #4 (API 42-497-36046) is a horizontal well in Wise County operated by Devon Energy Production CO L.P., completed September 26, 2006.
The RRC has issued 2 drilling permits between 2006 and 2016, permitted to 9,000 ft.
Completion filings report 5 formation tops, including Caddo, Atoka, Marble Falls, Barnett.
Its 2 leases have reported 5.41K barrels of oil and 166K mcf of gas since September 2006, last reporting in July 2026. The leases carry 2 wells, so these are lease totals, not this well alone.
Operator of record
Devon Energy Production Co L.P.
Oklahoma City, OK · P-5 Y, filed Nov 4, 2025 · 9,266 permits on file · (800) 465-8314
SOURCE · RRC EWA WELLBORE SCHEDULE
What each RRC source says
| Wellbore schedule | Devon Energy Production Co L.P. |
| Production reports | BKV Barnett, LLCthrough Jan 2023 |
| Latest permit | Devon Energy Production Co, L.P.Apr 8, 2016 |
The sources disagree, which usually means a transfer or a lease-level production filing by a different entity. Petrora goes with the schedule.
- 9,000
- total depth, ft
- 2
- permits on file
- Apr 8, 2016
- last permit issued
- Sep 26, 2006
- completed
- 5.41K
- cumulative oil, bbl
- 166K
- cumulative gas, mcf
PRODUCTION FROM PDQ LEASE REPORTS · Sep 2006 THROUGH Jul 2026
Regulatory status · RRC wellbore file
- Schedule
- OFF SCHEDULE
- Completed
- Sep 26, 2006
- Shut in
- —
- Plugged
- —
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 2 wells in total, so volumes are shared.Why →
| Lease | Field | Reporting operator | Wells | Oil, bbl | Gas, mcf | Reported |
|---|---|---|---|---|---|---|
| Cox, Jr O-13-33519 | Boonsville (Atoka Congl. 5870) | BKV Barnett, LLC | 1 | 5.41K | 62K | May 2016 – Jul 2026 |
| Cox, J. R. GU G-13-224528 | Newark, East (Barnett Shale) | Devon Energy Production Co, L.P. | 1 | 0 | 104K | Sep 2006 – May 2016 |
No volumes reported on these leases in the last three years.
Chain of custody
Every operator that reported production on this well's lease, in order.
- 1Devon Energy Production Co, L.P.Sep 2006 → Nov 2019
Permits
| Permit | Type | Operator | Received | Issued | Spud | Depth |
|---|---|---|---|---|---|---|
| 814820-99 | Recompletion | Devon Energy Production Co, L.P. | Apr 4, 2016 | Apr 8, 2016 | Apr 7, 2016 | 7,000 |
| 619572-99 | Drill | Devon Energy Production Co, L.P. | May 19, 2006 | May 19, 2006 | Jun 18, 2006 | 9,000 |
Completions
| Completed | Lease | Field | Operator | Status | Depth |
|---|---|---|---|---|---|
| — | — G-13-224528 | — | — | — | — |
| — | — O-13-33519 | — | — | — | — |
Formation tops
As filed on W-2/G-1. Subsea from 836 ft elevation.Download CSV →
| Formation | MD ft | Subsea |
|---|---|---|
| CaddoCADDO LIME | 4,846 | -4,010 |
| Atoka | 5,510 | -4,674 |
| Marble Falls | 6,718 | -5,882 |
| Marble Falls | 6,720 | -5,884 |
| Marble Falls | 6,721 | -5,885 |
| BarnettBARNETT SHALE | 7,057 | -6,221 |
| BarnettBARNETT SHALE | 7,058 | -6,222 |
| Forestberg | 7,193 | -6,357 |
Perforations
Perforated and open-hole intervals.
| From | To | Type |
|---|---|---|
| 6,525 | 6,654 | Perforated |
| 8,115 | 8,543 | Perforated |
| 8,965 | 9,393 | Perforated |
| 9,815 | 10,243 | Perforated |
Casing
Strings as reported, shallowest first.
| Casing in | Set at | Hole in | Cement |
|---|---|---|---|
| 9.625 | 440 | 13.5 | 220 S |
| 7 | 8,033 | 8.5 | 610 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 | Sep 21, 2016 | Aug 15, 2016 | Yes |
| 00 | Jun 10, 2016 | May 11, 2016 | — |
| 00 | Jul 24, 2007 | Jun 18, 2007 | — |
| 00 | Apr 14, 2007 | Nov 13, 2006 | Yes |
| 00 | Feb 13, 2007 | — | — |
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 42-497-36046 → W-2, G-1, plugging reports, as PDFs
- Completion packets for 42-497-36046 → 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/49736046, documented in the API reference.