TEXAS · WELLS · HOWARD COUNTY · API 42-227-36451 · DISTRICT 7B
Chalk G. O. -C- #30
Howard County · Howard Glasscock (Consolidated) field · Producing · Vertical
Chalk G. O. -C- #30 (API 42-227-36451) is a well in Howard County operated by Citation Oil & Gas Corp., completed January 13, 2012 and listed as producing on the RRC schedule.
The RRC has issued 2 drilling permits between 2010 and 2011, permitted to 4,353 ft.
It was permitted by Conocophillips Company and has since transferred to Citation Oil & Gas Corp. on the wellbore schedule.
Completion filings report 7 formation tops, including Seven Rivers, Queen, Grayburg, San Andres.
Its 2 leases have reported 741K barrels of oil and 111K mcf of gas since March 2011, last reporting volume in April 2026. The leases carry 27 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 | Citation Oil & Gas Corp. |
| Production reports | Citation Oil & Gas Corp.through Apr 2026 |
| Latest permit | Conocophillips CompanyOct 24, 2011 |
The sources disagree, which usually means a transfer or a lease-level production filing by a different entity. Petrora goes with the schedule.
- 4,353
- total depth, ft
- 2
- permits on file
- Oct 24, 2011
- last permit issued
- Jan 13, 2012
- completed
- 741K
- cumulative oil, bbl
- 111K
- cumulative gas, mcf
PRODUCTION FROM PDQ LEASE REPORTS · Jun 2011 THROUGH Apr 2026
Regulatory status · RRC wellbore file
- Schedule
- ON SCHEDULE
- Completed
- Jan 13, 2012
- Shut in
- —
- 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 27 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 – Apr 2026 |
| Chalk, G. O. C O-10-41491 | Howard Glasscock (Clear Fork,mi) | Conocophillips Company | 1 | 5.37K | 660 | Mar 2011 – Nov 2011 |
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.
- 1Conocophillips CompanyJun 2011 → Jan 2018
- 2Citation Oil & Gas Corp.Feb 2018 → Apr 2026
Permits
| Permit | Type | Operator | Received | Issued | Spud | Depth |
|---|---|---|---|---|---|---|
| 726535-99 | Recompletion | Conocophillips Company | Oct 18, 2011 | Oct 24, 2011 | Nov 23, 2011 | 4,500 |
| 699962-99 | Drill | Conocophillips Company | Jul 30, 2010 | Aug 6, 2010 | Feb 22, 2011 | 4,500 |
Completions
| Completed | Lease | Field | Operator | Status | Depth |
|---|---|---|---|---|---|
| Jan 13, 2012 | Chalk G. O. -C- O-10-41213 | Howard Glasscock (Consolidated) | Citation Oil & Gas Corp. | Producing | 4,353 |
| Jan 13, 2012 | Chalk G. O. -C- O-10-41213 | Howard Glasscock (Consolidated) | Citation Oil & Gas Corp. | Producing | 4,353 |
| Mar 31, 2011 | Chalk G. O. C O-10-41491 | Howard Glasscock (Clear Fork MI) | Conocophillips Company | Not on Schedule | — |
Formation tops
As filed on W-2/G-1. Subsea from 2,653 ft elevation.Download CSV →
| Formation | MD ft | Subsea |
|---|---|---|
| Seven Rivers | 1,492 | 1,161 |
| Queen | 1,692 | 961 |
| Grayburg | 2,002 | 651 |
| San Andres | 2,308 | 345 |
| Glorieta | 2,842 | -189 |
| Clear ForkCLEARFORK | 3,190 | -537 |
| Tubb | 3,780 | -1,127 |
Perforations
Perforated and open-hole intervals.
| From | To | Type |
|---|---|---|
| 1,524 | 1,646 | Perforated |
| 1,732 | 1,874 | Perforated |
| 2,269 | 2,293 | Perforated |
| 2,314 | 2,423 | Perforated |
| 2,525 | 2,797 | Perforated |
| 2,880 | 3,106 | Perforated |
| 3,192 | 3,423 | Perforated |
| 3,446 | 3,732 | Perforated |
| 3,814 | 4,263 | Perforated |
Casing
Strings as reported, shallowest first.
| Casing in | Set at | Hole in | Cement |
|---|---|---|---|
| 8.625 | 1,006 | 12.25 | 600 S |
| 5.5 | 4,338 | 7.875 | 800 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. The record date is the RRC's own date on the record, not the day the report was filed: 462,034 of the state's filings carry 1984-01-12. About these reports →
| Suffix | RRC record date | W-2 / G-1 date | Logs referenced |
|---|---|---|---|
| 00 | Oct 23, 2013 | Mar 1, 2012 | — |
| 00 | Mar 19, 2013 | Jul 9, 2011 | Yes |
| 00 | May 25, 2012 | Jul 9, 2011 | Yes |
Well logs
1 log loaded from the RRC's log index, the latest received Jul 9, 2012. Neutron. These are the logs loaded into Petrora from the Railroad Commission's inventories, not necessarily every log run on the well. The RRC holds the files; each opens from its log search for the well. The kind is the RRC's description of the log; the interval is the one filed for it.
Open the RRC's log search for this well ↗| Logas described | Files | Intervalft, as filed | Datereceived | SizeMB |
|---|---|---|---|---|
| NEUTRON POROSITYSpans Seven Rivers, Queen, Grayburg, San Andres, Glorieta, Clear Fork, Tubb | TIFF | 200 to 4,282 | Jul 9, 2012run Mar 11, 2011 | 4.40 |
"Spans" is by this well's own filed formation tops: a formation runs from its top to the next deeper top filed, and the deepest runs to the bottom of the log. Depths are measured along the wellbore, so on a horizontal the lateral counts in the formation it was landed in.
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 42-227-36451 → W-2, G-1, plugging reports, as PDFs
- Completion packets for 42-227-36451 → scanned completion filings
The logs loaded for this well are under Well logs, with the RRC's log search for it.
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/22736451, documented in the API reference.