WELL · 42-227-34102 · DISTRICT 8
Chalk Mary #71
Howard County · Howard Glasscock field · Vertical
Chalk Mary #71 (API 42-227-34102) is a well in Howard County operated by Conocophillips Company, completed February 23, 1987.
The RRC has issued one drilling permit, issued November 26, 1986, permitted to 2,600 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 5 formation tops, including Yates, Seven Rivers, Queen, Grayburg.
Its 2 leases have reported 578K barrels of oil and 238K mcf of gas since January 1993, last reporting in July 2026. The leases carry 67 wells, so these are lease totals, not this well alone.
It holds an active disposal or injection permit, with 157K barrels injected in the 12 months reported through December 2025.
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 | Conocophillips Company |
| Production reports | Citation Oil & Gas Corp.through Apr 2026 |
| Latest permit | Mobil Producing TX. & N.M. Inc.Nov 26, 1986 |
The sources disagree, which usually means a transfer or a lease-level production filing by a different entity. Petrora goes with the schedule.
- 2,600
- total depth, ft
- 1
- permits on file
- Nov 26, 1986
- last permit issued
- Feb 23, 1987
- completed
- 578K
- cumulative oil, bbl
- 238K
- cumulative gas, mcf
PRODUCTION FROM PDQ LEASE REPORTS · Jan 1993 THROUGH Jul 2026
Regulatory status · RRC wellbore file
- Schedule
- OFF SCHEDULE
- Completed
- Feb 23, 1987
- 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 67 wells in total, so volumes are shared.Why →
| Lease | Field | Reporting operator | Wells | Oil, bbl | Gas, mcf | Reported |
|---|---|---|---|---|---|---|
| Chalk,mary O-10-41221 | Howard Glasscock (Consolidated) | Citation Oil & Gas Corp. | 37 | 366K | 130K | Dec 2011 – Jul 2026 |
| Chalk, Mary O-10-2763 | Howard Glasscock | Conocophillips Company | 30 | 212K | 108K | Jan 1993 – Apr 2012 |
Oil, barrels lease total
Last 12 months 22,682 · prior 12 25,707(-12%)
Gas, mcf lease total
Last 12 months 2,538 · prior 12 4,833(-47%)
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 |
|---|---|---|---|---|---|---|
| 323056-99 | Drill | Mobil Producing TX. & N.M. Inc. | Nov 13, 1986 | Nov 26, 1986 | — | 2,600 |
Completions
| Completed | Lease | Field | Operator | Status | Depth |
|---|---|---|---|---|---|
| — | — O-10-2763 | — | — | — | — |
| — | — O-10-41221 | — | — | — | — |
Formation tops
As filed on W-2/G-1. Subsea from 2,481 ft elevation.Download CSV →
| Formation | MD ft | Subsea |
|---|---|---|
| Yates | 1,234 | 1,247 |
| Seven Rivers | 1,321 | 1,160 |
| Queen | 1,546 | 935 |
| Grayburg | 1,813 | 668 |
| San Andres | 1,920 | 561 |
Perforations
Perforated and open-hole intervals.
| From | To | Type |
|---|---|---|
| 2,084 | 2,227 | Perforated |
Casing
Strings as reported, shallowest first.
| Casing in | Set at | Hole in | Cement |
|---|---|---|---|
| 8.625 | 250 | 12.25 | 180 S |
| 5.5 | 2,500 | 7.875 | 625 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 | Sep 25, 2020 | Jan 20, 2020 | — |
| 00 | Mar 1, 2012 | Mar 9, 1987 | Yes |
| 00 | Mar 30, 1987 | Mar 9, 1987 | Yes |
| 00 | Mar 18, 1987 | — | — |
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 42-227-34102 → W-2, G-1, plugging reports, as PDFs
- Completion packets for 42-227-34102 → 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.
Beyond the permit record
RRC UIC permits · H-10 reported volumes
Injection
- 157K
- bbl, last 12 reported months
- 719K
- bbl, all reported
- Dec 2025
- reported through
| UIC | Kind | Status | Permitted bbl/d | Max psi | Zone ft |
|---|---|---|---|---|---|
| 000118473 | H-1 Injection | Active | 2,000 | 675 | 1,350–2,227 |
MONTHLY INJECTED, BBL · H-10 · LAST 24 REPORTED MONTHS
Last 12 months 157,019 · prior 12 192,499(-18%)
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/22734102, documented in the API reference.