TEXAS · WELLS · HOWARD COUNTY · API 42-227-81150 · DISTRICT 7B
Chalk Mary #12
Howard County · Howard Glasscock (Consolidated) field · Vertical
Chalk Mary #12 (API 42-227-81150) is a plugged well in Howard County, plugged June 28, 2021, last operated by R2q Operating LLC.
The RRC has issued one drilling permit, issued October 5, 1981, permitted to 1,611 ft.
It was permitted by Guthrie, A. K. Operating CO. and has since transferred to R2q Operating LLC on the wellbore schedule.
Its 2 leases have reported 125K barrels of oil and 21 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
Permitted by Guthrie, A. K. Operating Co.; the EWA schedule now lists a different operator.
- Based in
- Iowa Park, TX
- P-5 status
- Active – Extension (X)
- P-5 last filed
- Sep 12, 2025
- Permits on file
- 38
- Phone
- (940) 228-1500
SOURCE · RRC EWA WELLBORE SCHEDULE
What each RRC source says
| Wellbore schedule | Extex Operating Company |
| Production reports | Extex Operating Companythrough Apr 2026 |
| Latest permit | Guthrie, A. K. Operating Co.Oct 5, 1981 |
The sources disagree, which usually means a transfer or a lease-level production filing by a different entity. Petrora goes with the schedule.
- 1,611
- total depth, ft
- 1
- permits on file
- Oct 5, 1981
- last permit issued
- Oct 29, 1981
- completed
- 125K
- cumulative oil, bbl
- 21
- cumulative gas, mcf
PRODUCTION FROM PDQ LEASE REPORTS · Jan 1993 THROUGH Jul 2026
Regulatory status · RRC wellbore file
- Schedule
- OFF SCHEDULE
- Completed
- Oct 29, 1981
- Shut in
- —
- Plugged
- Jun 28, 2021
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, Mary O-10-41716 | Howard Glasscock (Consolidated) | Extex Operating Company | 10 | 61.2K | 0 | Dec 2011 – Jul 2026 |
| Chalk, Mary O-10-10116 | Howard Glasscock | Legacy Reserves Operating LP | 7 | 63.4K | 21 | Jan 1993 – Sep 2012 |
Oil, barrels lease total
Last 12 months 4,447 · prior 12 4,745(-6%)
Chain of custody
Every operator that reported production on this well's lease, in order.
- 1Guthrie, A. K. Operating Co.Jan 1993 → Mar 1996
- 2Marathon Oil CompanyApr 1996 → Oct 1999
- 3Brothers Production Company Inc.Nov 1999 → Mar 2006
- 4Legacy Reserves Operating LPApr 2006 → Jan 2021
- 5Extex Operating CompanyFeb 2021 → Apr 2026
Permits
| Permit | Type | Operator | Received | Issued | Spud | Depth |
|---|---|---|---|---|---|---|
| 135442-99 | Other | Guthrie, A. K. Operating Co. | Oct 5, 1981 | Oct 5, 1981 | — | 1,611 |
Completions
| Completed | Lease | Field | Operator | Status | Depth |
|---|---|---|---|---|---|
| Oct 29, 1981 | Chalk Mary O-10-41716 | Howard Glasscock (Consolidated) | R2Q Operating LLC | Plugged | — |
| Oct 29, 1981 | Chalk Mary O-10-10116 | Howard Glasscock | Legacy Reserves Operating LP | Plugged | — |
Perforations
Perforated and open-hole intervals.
| From | To | Type |
|---|---|---|
| 1,385 | 1,598 | Perforated |
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 | Aug 20, 2012 | Nov 3, 1981 | — |
| 00 | Jan 12, 1984 | Nov 3, 1981 | — |
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 42-227-81150 → W-2, G-1, plugging reports, as PDFs
- Completion packets for 42-227-81150 → 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/22781150, documented in the API reference.