WELL · 42-227-36244 · DISTRICT 8
Chalk G. O. -C- #31
Howard County · Howard Glasscock (Consolidated) field · Shut IN · Vertical
Chalk G. O. -C- #31 (API 42-227-36244) is a well in Howard County operated by Citation Oil & Gas Corp., completed August 5, 2011 and listed as shut in on the RRC schedule, shut in September 1, 2026.
The RRC has issued 2 drilling permits between 2009 and 2012, permitted to 4,510 ft.
It was permitted by Conocophillips Company and has since transferred to Citation Oil & Gas Corp. on the wellbore schedule.
Completion filings report 8 formation tops, including Yates, Queen, Grayburg, San Andres.
Its 2 leases have reported 1.3M barrels of oil and 140K mcf of gas since January 1993, last reporting in July 2026. The leases carry 39 wells, so these are lease totals, not this well alone.
Operator of record
Permitted by Conocophillips Company; the EWA schedule now lists a different operator.
- Based in
- Houston, TX
- P-5 status
- Active – Extension (X)
- P-5 last filed
- May 27, 2026
- Permits on file
- 866
- Phone
- (281) 891-1000
SOURCE · RRC EWA WELLBORE SCHEDULE
What each RRC source says
| Wellbore schedule | none |
| Production reports | Citation Oil & Gas Corp.through Apr 2026 |
| Latest permit | Conocophillips CompanyJan 18, 2012 |
- 4,510
- total depth, ft
- 2
- permits on file
- Jan 18, 2012
- last permit issued
- Aug 5, 2011
- completed
- 1.3M
- cumulative oil, bbl
- 140K
- cumulative gas, mcf
PRODUCTION FROM PDQ LEASE REPORTS · Jan 1993 THROUGH Jul 2026
Regulatory status · RRC wellbore file
- Schedule
- ON SCHEDULE
- Completed
- Aug 5, 2011
- Shut in
- Sep 1, 2026
- Plugged
- —
Operator's P-5 on the schedule: Active (A)
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 39 wells in total, so volumes are shared.Why →
| Lease | Field | Reporting operator | Wells | Oil, bbl | Gas, mcf | Reported |
|---|---|---|---|---|---|---|
| Chalk, G. O. -C- O-10-41213 | Howard Glasscock (Consolidated) | Citation Oil & Gas Corp. | 26 | 736K | 111K | Dec 2011 – Jul 2026 |
| Chalk, G. O. -C- O-10-18989 | Howard-Glasscock (Glorieta) | Conocophillips Company | 13 | 560K | 29.4K | Jan 1993 – Apr 2012 |
Oil, barrels lease total
Last 12 months 29,327 · prior 12 36,663(-20%)
Gas, mcf lease total
Last 12 months 5,988 · prior 12 6,100(-2%)
Chain of custody
Every operator that reported production on this well's lease, in order.
- 1Conoco Inc.Jan 1993 → Dec 2002
- 2Conocophillips CompanyJan 2003 → Jan 2018
- 3Citation Oil & Gas Corp.Feb 2018 → Apr 2026
Permits
| Permit | Type | Operator | Received | Issued | Spud | Depth |
|---|---|---|---|---|---|---|
| 731397-99 | Field transfer | Conocophillips Company | Jan 10, 2012 | Jan 18, 2012 | — | 4,600 |
| 683405-99 | Drill | Conocophillips Company | Jul 23, 2009 | Jul 29, 2009 | Aug 17, 2009 | 4,600 |
Completions
| Completed | Lease | Field | Operator | Status | Depth |
|---|---|---|---|---|---|
| Aug 5, 2011 | Chalk G. O. -C- O-10-41213 | Howard Glasscock (Consolidated) | Citation Oil & Gas Corp. | Shut IN · shut in Sep 1, 2026 | 4,510 |
| Sep 22, 2009 | Chalk G. O. -C- O-10-18989 | Howard-Glasscock (Glorieta) | Conocophillips Company | Not on Schedule | — |
Formation tops
As filed on W-2/G-1. Subsea from 2,681 ft elevation.Download CSV →
| Formation | MD ft | Subsea |
|---|---|---|
| Yates | 1,444 | 1,237 |
| Queen | 1,734 | 947 |
| Grayburg | 2,049 | 632 |
| San Andres | 2,354 | 327 |
| Glorieta | 2,897 | -216 |
| Clear Fork | 3,216 | -535 |
| Clear ForkCLEARFORK | 3,216 | -535 |
| Tubb | 3,802 | -1,121 |
| Wcab | 4,351 | -1,670 |
Perforations
Perforated and open-hole intervals.
| From | To | Type |
|---|---|---|
| 2,315 | 2,339 | Perforated |
| 2,344 | 2,730 | Perforated |
| 2,932 | 3,208 | Perforated |
| 3,226 | 3,744 | Perforated |
| 3,226 | 4,138 | Perforated |
| 3,824 | 4,138 | Perforated |
Casing
Strings as reported, shallowest first.
| Casing in | Set at | Hole in | Cement |
|---|---|---|---|
| 8.625 | 996 | 12.25 | 650 S |
| 5.5 | 4,503 | 7.875 | 1,100 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 | May 16, 2014 | Feb 22, 2013 | — |
| 00 | Mar 1, 2012 | Oct 22, 2009 | Yes |
| 00 | Jan 25, 2010 | Oct 22, 2009 | Yes |
| 00 | Jan 6, 2010 | — | — |
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 42-227-36244 → W-2, G-1, plugging reports, as PDFs
- Completion packets for 42-227-36244 → 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/22736244, documented in the API reference.