WELL · 42-227-35657 · DISTRICT 8
Chalk Otis /EO/ #9
Howard County · Howard Glasscock field · Vertical
Chalk Otis /EO/ #9 (API 42-227-35657) is a well in Howard County operated by Cimarex Energy CO. Of Colorado, completed May 19, 2001.
The RRC has issued one drilling permit, issued March 20, 2001, permitted to 3,500 ft.
It was permitted by Prize Operating Company and has since transferred to Cimarex Energy CO. Of Colorado on the wellbore schedule.
Completion filings report 4 formation tops, including Seven Rivers, Queen, San Andres, Glorieta.
Its 2 leases have reported 314K barrels of oil and 191K mcf of gas since January 1993, last reporting in July 2026. The leases carry 17 wells, so these are lease totals, not this well alone.
Operator of record
Cimarex Energy Co. of Colorado
Permitted by Prize Operating Company; the EWA schedule now lists a different operator.
Midland, TX · P-5 Y, filed Feb 4, 2026 · 476 permits on file · (800) 969-4789
SOURCE · RRC EWA WELLBORE SCHEDULE
What each RRC source says
| Wellbore schedule | Cimarex Energy Co. of Colorado |
| Production reports | Grayrock Energy II, LLCthrough Apr 2026 |
| Latest permit | Prize Operating CompanyMar 20, 2001 |
The sources disagree, which usually means a transfer or a lease-level production filing by a different entity. Petrora goes with the schedule.
- 3,500
- total depth, ft
- 1
- permits on file
- Mar 20, 2001
- last permit issued
- May 19, 2001
- completed
- 314K
- cumulative oil, bbl
- 191K
- cumulative gas, mcf
PRODUCTION FROM PDQ LEASE REPORTS · Jan 1993 THROUGH Jul 2026
Regulatory status · RRC wellbore file
- Schedule
- OFF SCHEDULE
- Completed
- May 19, 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 17 wells in total, so volumes are shared.Why →
| Lease | Field | Reporting operator | Wells | Oil, bbl | Gas, mcf | Reported |
|---|---|---|---|---|---|---|
| Chalk, Otis /EO/ O-10-42211 | Howard Glasscock (Consolidated) | Grayrock Energy II, LLC | 7 | 70.3K | 22.7K | Dec 2011 – Jul 2026 |
| Chalk, Otis /EO/ O-10-2727 | Howard Glasscock | Cimarex Energy Co. of Colorado | 10 | 243K | 168K | Jan 1993 – Mar 2013 |
Oil, barrels lease total
Last 12 months 3,801 · prior 12 3,716(+2%)
Chain of custody
Every operator that reported production on this well's lease, in order.
- 1Wood, McShane & ThamsJan 1993 → Oct 1995
- 2Vista Resources, Inc. (A)Nov 1995 → Feb 2000
- 3Prize Operating CompanyMar 2000 → Mar 2002
- 4Gruy Petroleum Management Co.Apr 2002 → Apr 2006
- 5Cimarex Energy Co. of ColoradoMay 2006 → Dec 2012
- 6Merit Energy CompanyJan 2013 → May 2017
- 7Rover Petroleum Operating, LLCJun 2017 → Dec 2023
- 8Grayrock Energy II, LLCJan 2024 → Apr 2026
Permits
| Permit | Type | Operator | Received | Issued | Spud | Depth |
|---|---|---|---|---|---|---|
| 505538-99 | Drill | Prize Operating Company | Feb 20, 2001 | Mar 20, 2001 | Apr 28, 2001 | 3,500 |
Completions
| Completed | Lease | Field | Operator | Status | Depth |
|---|---|---|---|---|---|
| — | — O-10-2727 | — | — | — | — |
| — | — O-10-42211 | — | — | — | — |
Formation tops
As filed on W-2/G-1. Subsea from 2,608 ft elevation.Download CSV →
| Formation | MD ft | Subsea |
|---|---|---|
| Seven Rivers7 RIVERS | 1,422 | 1,186 |
| Queen | 1,638 | 970 |
| San Andres | 1,908 | 700 |
| Glorieta | 2,766 | -158 |
Perforations
Perforated and open-hole intervals.
| From | To | Type |
|---|---|---|
| 2,152 | 2,496 | Perforated |
| 2,826 | 3,065 | Perforated |
Casing
Strings as reported, shallowest first.
| Casing in | Set at | Hole in | Cement |
|---|---|---|---|
| 8.625 | 352 | 12.25 | 250 S |
| 5.5 | 3,314 | 7.875 | 770 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 31, 2013 | Jun 18, 2001 | Yes |
| 00 | Oct 21, 2002 | Jun 18, 2001 | Yes |
| 00 | Oct 7, 2002 | — | — |
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 42-227-35657 → W-2, G-1, plugging reports, as PDFs
- Completion packets for 42-227-35657 → 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/22735657, documented in the API reference.