WELL · 42-227-33314 · DISTRICT 8
Chalk Mary #66
Howard County · Howard-Glasscock (Glorieta) field · Vertical
Chalk Mary #66 (API 42-227-33314) is a plugged well in Howard County, plugged June 5, 1991, last operated by Conocophillips Company.
The RRC has issued 3 drilling permits between 1984 and 1988, permitted to 3,900 ft.
It was permitted by Mobil Producing TX. & N.M. Inc. and has since transferred to Conocophillips Company on the wellbore schedule.
Completion filings report 7 formation tops, including Yates, Seven Rivers, Queen, Grayburg.
Its lease has reported 642K barrels of oil and 188K mcf of gas since January 1993, last reporting in April 2012. The lease carries 29 wells, so these are lease totals, not this well alone.
Operator of record
Permitted by Mobil Producing TX. & N.M. Inc.; the EWA schedule now lists a different operator.
- Based in
- Midland, TX
- P-5 status
- Active (A)
- P-5 last filed
- Feb 3, 2026
- Permits on file
- 3,290
- Phone
- (432) 683-7443
SOURCE · RRC EWA WELLBORE SCHEDULE
What each RRC source says
| Wellbore schedule | none |
| Production reports | Conocophillips Companythrough Nov 2011 |
| Latest permit | Mobil Producing TX. & N.M. Inc.Mar 18, 1988 |
- 3,900
- total depth, ft
- 3
- permits on file
- Mar 18, 1988
- last permit issued
- Jun 6, 1988
- completed
- 642K
- cumulative oil, bbl
- 188K
- cumulative gas, mcf
PRODUCTION FROM PDQ LEASE REPORTS · Jan 1993 THROUGH Apr 2012
Regulatory status · RRC wellbore file
- Schedule
- OFF SCHEDULE
- Completed
- Jun 6, 1988
- Shut in
- —
- Plugged
- Jun 5, 1991
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; they carry 29 wells in total, so volumes are shared.Why →
| Lease | Field | Reporting operator | Wells | Oil, bbl | Gas, mcf | Reported |
|---|---|---|---|---|---|---|
| Chalk, Mary O-10-19033 | Howard-Glasscock (Glorieta) | Conocophillips Company | 29 | 642K | 188K | Jan 1993 – Apr 2012 |
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.
- 1Conoco Inc.Jan 1993 → Dec 2002
- 2Conocophillips CompanyJan 2003 → Nov 2011
Permits
| Permit | Type | Operator | Received | Issued | Spud | Depth |
|---|---|---|---|---|---|---|
| 343753-99 | Recompletion | Mobil Producing TX. & N.M. Inc. | Mar 11, 1988 | Mar 18, 1988 | — | 3,900 |
| 266324-99 | Recompletion | Mobil Producing TX. & N.M. Inc. | Dec 21, 1984 | Feb 11, 1985 | — | 3,900 |
| 230902-99 | Drill | Mobil Producing TX. & N.M. Inc. | Dec 13, 1983 | Feb 16, 1984 | Feb 16, 1984 | 3,100 |
Completions
| Completed | Lease | Field | Operator | Status | Depth |
|---|---|---|---|---|---|
| Jun 6, 1988 | Chalk Mary O-10-19033 | Howard-Glasscock (Glorieta) | Conocophillips Company | Plugged | — |
| Jun 6, 1988 | Chalk Mary O-10-19033 | Howard-Glasscock (Glorieta) | Conocophillips Company | Plugged | — |
Formation tops
As filed on W-2/G-1. Subsea from 6,486 ft elevation.Download CSV →
| Formation | MD ft | Subsea |
|---|---|---|
| Yates | 1,252 | 5,234 |
| Seven Rivers | 1,346 | 5,140 |
| Queen | 1,574 | 4,912 |
| Grayburg | 1,848 | 4,638 |
| Sanders | 1,952 | 4,534 |
| GlorietaGLORIETTA | 2,582 | 3,904 |
| Clear ForkCLEARFORK | 2,995 | 3,491 |
Perforations
Perforated and open-hole intervals.
| From | To | Type |
|---|---|---|
| 2,906 | 2,914 | Perforated |
| 2,996 | — | Perforated |
| 2,999 | 3,001 | Perforated |
| 3,009 | 3,012 | Perforated |
| 3,016 | 3,019 | Perforated |
| 3,031 | 3,035 | Perforated |
| 3,040 | 3,042 | Perforated |
| 3,470 | 3,786 | Perforated |
Casing
Strings as reported, shallowest first.
| Casing in | Set at | Hole in | Cement |
|---|---|---|---|
| 8.625 | 288 | 12.25 | 350 S |
| 8.625 | 288 | — | — |
| 5.5 | 3,100 | 12.25 | 600 S |
| 5.5 | 3,100 | — | — |
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 | Jul 14, 1988 | Jun 24, 1988 | — |
| 00 | Oct 18, 1984 | Sep 19, 1984 | — |
| 00 | Oct 2, 1984 | — | — |
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 42-227-33314 → W-2, G-1, plugging reports, as PDFs
- Completion packets for 42-227-33314 → 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/22733314, documented in the API reference.