WELL · 42-353-32717 · DISTRICT 7
Cox E. S. #109
Nolan County · Lake Trammel (Strawn Reef) field · Vertical
Cox E. S. #109 (API 42-353-32717) is a well in Nolan County operated by Grayrock Energy II LLC, completed April 28, 2001.
The RRC has issued 2 drilling permits between 2000 and 2005, permitted to 7,200 ft.
It was permitted by L.C.S. Production Company and has since transferred to Grayrock Energy II LLC on the wellbore schedule.
Completion filings report 4 formation tops, including King Sand, Canyon, Strawn, Ellenburger.
Its 2 leases have reported 3.86M barrels of oil and 2.09M mcf of gas since January 1993, last reporting in July 2026. The leases carry 206 wells, so these are lease totals, not this well alone.
Operator of record
Permitted by L.C.S. Production Company; the EWA schedule now lists a different operator.
Fort Worth, TX · P-5 Y, filed Aug 4, 2025 · (214) 234-9115
SOURCE · RRC EWA WELLBORE SCHEDULE
What each RRC source says
| Wellbore schedule | Grayrock Energy II LLC |
| Production reports | Grayrock Energy II, LLCthrough Apr 2026 |
| Latest permit | L.C.S. Production CompanyOct 11, 2005 |
The sources disagree, which usually means a transfer or a lease-level production filing by a different entity. Petrora goes with the schedule.
- 7,200
- total depth, ft
- 2
- permits on file
- Oct 11, 2005
- last permit issued
- Apr 28, 2001
- completed
- 3.86M
- cumulative oil, bbl
- 2.09M
- cumulative gas, mcf
PRODUCTION FROM PDQ LEASE REPORTS · Jan 1993 THROUGH Jul 2026
Regulatory status · RRC wellbore file
- Schedule
- OFF SCHEDULE
- Completed
- Apr 28, 2001
- 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 206 wells in total, so volumes are shared.Why →
| Lease | Field | Reporting operator | Wells | Oil, bbl | Gas, mcf | Reported |
|---|---|---|---|---|---|---|
| Cox, E. S. O-8-2972 | Lake Trammel (Strawn Reef) | Grayrock Energy II, LLC | 3 | 3.12K | 1.32K | Jan 1993 – Jul 2026 |
| Lake Trammel Unit O-8-8712 | Lake Trammel, W. (Canyon) | Grayrock Energy II, LLC | 203 | 3.85M | 2.09M | Jan 1993 – Jul 2026 |
Oil, barrels lease total
Last 12 months 76,226 · prior 12 81,636(-7%)
Gas, mcf lease total
Last 12 months 16,928 · prior 12 34,078(-50%)
Chain of custody
Every operator that reported production on this well's lease, in order.
- 1Eldorado Operating Co.Jan 1993 → Oct 1995
- 2Brothers Operating Company Inc.Nov 1995 → Apr 2003
- 3Shenandoah Petroleum CorporationMay 2003 → Jan 2004
- 4L.C.S. Production CompanyFeb 2004 → Apr 2009
- 5Plantation Operating, LLCMay 2009 → Nov 2011
- 6Merit Energy CompanyDec 2011 → May 2017
- 7Rover Petroleum Operating, LLCJun 2017 → Dec 2023
- 8Grayrock Energy II, LLCJan 2024 → Apr 2026
Permits
| Permit | Type | Operator | Received | Issued | Spud | Depth |
|---|---|---|---|---|---|---|
| 607565-99 | Reenter | L.C.S. Production Company | Oct 7, 2005 | Oct 11, 2005 | — | 6,240 |
| 502772-99 | Drill | Brothers Operating Company Inc. | Dec 7, 2000 | Dec 7, 2000 | Jan 13, 2001 | 7,200 |
Completions
| Completed | Lease | Field | Operator | Status | Depth |
|---|---|---|---|---|---|
| — | — O-8-2972 | — | — | — | — |
| — | — O-8-8712 | — | — | — | — |
Formation tops
As filed on W-2/G-1. Subsea from 2,427 ft elevation.Download CSV →
| Formation | MD ft | Subsea |
|---|---|---|
| King Sand | 4,440 | -2,013 |
| CanyonCANYON SD | 5,310 | -2,883 |
| Canyon | 5,312 | -2,885 |
| Strawn | 6,254 | -3,827 |
| Ellenburger | 6,890 | -4,463 |
Perforations
Perforated and open-hole intervals.
| From | To | Type |
|---|---|---|
| 5,312 | 5,317 | Perforated |
| 5,322 | 5,327 | Perforated |
| 5,336 | 5,342 | Perforated |
| 6,290 | 6,299 | Perforated |
| 6,488 | 6,497 | Perforated |
Casing
Strings as reported, shallowest first.
| Casing in | Set at | Hole in | Cement |
|---|---|---|---|
| 8.625 | 365 | 12.25 | 350 S |
| 5.5 | 6,890 | 7.875 | 830 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 15, 2005 | Mar 9, 2005 | Yes |
| 00 | Oct 12, 2005 | — | — |
| 00 | Feb 25, 2004 | May 22, 2001 | Yes |
| 00 | Jan 29, 2004 | — | — |
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 42-353-32717 → W-2, G-1, plugging reports, as PDFs
- Completion packets for 42-353-32717 → 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.
Beyond the permit record
RRC UIC permits · H-10 reported volumes
Injection
- 0
- bbl, last 12 reported months
- 0
- bbl, all reported
- —
- reported through
| UIC | Kind | Status | Permitted bbl/d | Max psi | Zone ft |
|---|---|---|---|---|---|
| 000099634 | H-1 Injection | Not activated | 1,000 | 2,625 | 5,250–5,450 |
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/35332717, documented in the API reference.