WELL · 42-181-31485 · DISTRICT 9
Tunnell #1H
Grayson County · Sherman (10700) field · Producing · Horizontal
Tunnell #1H (API 42-181-31485) is a horizontal well in Grayson County operated by Charter Oak Production CO. LLC, completed March 1, 2012 and listed as producing on the RRC schedule.
The RRC has issued one drilling permit (amended once), issued September 1, 2011, permitted to 15,000 ft.
It was permitted by Slawson Exploration Company, Inc and has since transferred to Charter Oak Production CO. LLC on the wellbore schedule.
Completion filings report 4 formation tops, including Baker Sd, Davis Sd, Cordell Sd, Viola.
Its lease has reported 31.4K barrels of oil since February 2012, last reporting in July 2026.
Operator of record
Charter Oak Production Co. LLC
Permitted by Slawson Exploration Company, Inc; the EWA schedule now lists a different operator.
Oklahoma City, OK · P-5 Y, filed Jun 4, 2026 · 12 permits on file · (405) 630-4350
SOURCE · RRC EWA WELLBORE SCHEDULE
What each RRC source says
| Wellbore schedule | Charter Oak Production Co. LLC |
| Production reports | Charter Oak Production Co., LLCthrough Apr 2026 |
| Latest permit | Slawson Exploration Company, IncSep 1, 2011 |
The sources disagree, which usually means a transfer or a lease-level production filing by a different entity. Petrora goes with the schedule.
- 15,000
- total depth, ft
- 2
- permits on file
- Sep 1, 2011
- last permit issued
- Mar 1, 2012
- completed
- 31.4K
- cumulative oil, bbl
- 0
- cumulative gas, mcf
PRODUCTION FROM PDQ LEASE REPORTS · Feb 2012 THROUGH Jul 2026
Regulatory status · RRC wellbore file
- Schedule
- ON SCHEDULE
- Completed
- Mar 1, 2012
- Shut in
- —
- Plugged
- —
Operator's P-5 on the schedule: Active
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; this well is the only one on it.Why →
| Lease | Field | Reporting operator | Wells | Oil, bbl | Gas, mcf | Reported |
|---|---|---|---|---|---|---|
| Tunnell O-13-32299 | Sherman (10700) | Charter Oak Production Co., LLC | 1 | 31.4K | 0 | Feb 2012 – Jul 2026 |
Oil, barrels lease total
Last 12 months 679 · prior 12 916(-26%)
Chain of custody
Every operator that reported production on this well's lease, in order.
- 1Slawson Exploration Company, IncFeb 2012 → Apr 2018
- 2Charter Oak Production Co., LLCMay 2018 → Apr 2026
Permits
| Permit | Type | Operator | Received | Issued | Spud | Depth |
|---|---|---|---|---|---|---|
| 723286-98 | Drill | Slawson Exploration Company, Inc | Nov 21, 2012 | Sep 1, 2011 | Sep 18, 2011 | 15,000 |
| 723286-99 | Drill | Slawson Exploration Company, Inc | Aug 29, 2011 | Sep 1, 2011 | Sep 18, 2011 | 15,000 |
Completions
| Completed | Lease | Field | Operator | Status | Depth |
|---|---|---|---|---|---|
| — | — O-13-32299 | — | — | — | — |
Formation tops
As filed on W-2/G-1. Subsea from 789 ft elevation.Download CSV →
| Formation | MD ft | Subsea |
|---|---|---|
| Baker SD | 8,851 | -8,062 |
| Davis SD | 9,862 | -9,073 |
| Cordell SD | 10,866 | -10,077 |
| ViolaVIOLA SD | 11,482 | -10,693 |
Perforations
Perforated and open-hole intervals.
| From | To | Type |
|---|---|---|
| 11,865 | 13,800 | Perforated |
Casing
Strings as reported, shallowest first.
| Casing in | Set at | Hole in | Cement |
|---|---|---|---|
| 9.625 | 2,189 | 12.25 | 700 S |
| 7 | 11,903 | 8.75 | 385 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 | Jan 10, 2013 | Apr 20, 2012 | 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 42-181-31485 → W-2, G-1, plugging reports, as PDFs
- Completion packets for 42-181-31485 → 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/18131485, documented in the API reference.