WELL · 42-227-39867 · DISTRICT 8
Chalk G. O. #55CF
Howard County · Howard Glasscock (Consolidated) field · Shut IN · Vertical
Chalk G. O. #55CF (API 42-227-39867) is a well in Howard County operated by Grayrock Energy II LLC, completed December 1, 2018 and listed as shut in on the RRC schedule.
The RRC has issued one drilling permit, issued November 19, 2018, permitted to 4,200 ft.
It was permitted by Rover Petroleum Operating, LLC and has since transferred to Grayrock Energy II LLC on the wellbore schedule.
Completion filings report 10 formation tops, including Seven Rivers, San Andres, Glorieta, Clear Fork.
Its lease has reported 563K barrels of oil and 286 mcf of gas since December 2011, last reporting in July 2026. The lease carries 40 wells, so these are lease totals, not this well alone.
Operator of record
Permitted by Rover Petroleum Operating, LLC; the EWA schedule now lists a different operator.
Fort Worth, TX · P-5 Y, filed Aug 4, 2025 · (214) 234-9115
SOURCE · RRC EWA WELLBORE SCHEDULE
What each RRC source says
| Wellbore schedule | Grayrock Energy II LLC |
| Production reports | Grayrock Energy II, LLCthrough Apr 2026 |
| Latest permit | Rover Petroleum Operating, LLCNov 19, 2018 |
The sources disagree, which usually means a transfer or a lease-level production filing by a different entity. Petrora goes with the schedule.
- 4,200
- total depth, ft
- 1
- permits on file
- Nov 19, 2018
- last permit issued
- Dec 1, 2018
- completed
- 563K
- cumulative oil, bbl
- 286
- cumulative gas, mcf
PRODUCTION FROM PDQ LEASE REPORTS · Dec 2011 THROUGH Jul 2026
Regulatory status · RRC wellbore file
- Schedule
- ON SCHEDULE
- Completed
- Dec 1, 2018
- Shut in
- —
- Plugged
- —
Operator's P-5 on the schedule: Active
Surface location
32.125272, -101.247739
OpenStreetMap → · Google Maps →
Permit surface location from the RRC GIS record, in Howard County.
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 40 wells in total, so volumes are shared.Why →
| Lease | Field | Reporting operator | Wells | Oil, bbl | Gas, mcf | Reported |
|---|---|---|---|---|---|---|
| Chalk, G. O. O-10-42240 | Howard Glasscock (Consolidated) | Grayrock Energy II, LLC | 40 | 563K | 286 | Dec 2011 – Jul 2026 |
Oil, barrels lease total
Last 12 months 36,836 · prior 12 44,869(-18%)
Chain of custody
Every operator that reported production on this well's lease, in order.
- 1Cimarex Energy Co. of ColoradoDec 2011 → Dec 2012
- 2Merit Energy CompanyJan 2013 → May 2017
- 3Rover Petroleum Operating, LLCJun 2017 → Dec 2023
- 4Grayrock Energy II, LLCJan 2024 → Apr 2026
Permits
| Permit | Type | Operator | Received | Issued | Spud | Depth |
|---|---|---|---|---|---|---|
| 846853-99 | Drill | Rover Petroleum Operating, LLC | Nov 15, 2018 | Nov 19, 2018 | Nov 23, 2018 | 4,200 |
Completions
| Completed | Lease | Field | Operator | Status | Depth |
|---|---|---|---|---|---|
| — | — O-10-42240 | — | — | — | — |
Formation tops
As filed on W-2/G-1. Subsea from 2,430 ft elevation.Download CSV →
| Formation | MD ft | Subsea |
|---|---|---|
| Seven Rivers | 1,301 | 1,129 |
| San AndresSAN ANDRES - HIGH FLOWS, H2S, CO | 2,062 | 368 |
| Glorieta | 2,650 | -220 |
| Clear ForkCLEARFORK - SEVERE WATER FLOWS | 2,929 | -499 |
| Cisco | — | — |
| Coleman Junction | — | — |
| Dean | — | — |
| Leonard | — | — |
| Spraberry | — | — |
| Wolfcamp | — | — |
Casing
Strings as reported, shallowest first.
| Casing in | Set at | Hole in | Cement |
|---|---|---|---|
| 8.625 | 1,000 | 12.25 | 470 S |
| 5.5 | 4,179 | 7.875 | 640 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 1, 2019 | Mar 14, 2019 | — |
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 42-227-39867 → W-2, G-1, plugging reports, as PDFs
- Completion packets for 42-227-39867 → 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.
Nearby wells and their tops
NEAREST 8 LOCATED WELLS WITH TOPS · WITHIN 16 KM
Draw a cross-section
This well's tops beside its 5 nearest neighbours, subsea-aligned so they line up regardless of surface terrain.
Chalk, G. O.42-227-39678
0.2 KM · Rover Petroleum Operating, LLC · Section with this well →
| Yates | 1,168 | 1,257 |
| Seven Rivers | 1,254 | 1,171 |
| San Andres | 2,052 | 373 |
| Glorieta | 2,634 | -209 |
| Clear Fork | 2,902 | -477 |
| Dean | — | |
| Coleman Junction | — | |
| Spraberry | — |
10 TOPS · FIRST 8
Chalk, G. O.42-227-39679
0.2 KM · Rover Petroleum Operating, LLC · Section with this well →
| Atoka | — | |
| Leonard | — | |
| Dean | — | |
| Cisco | — | |
| Mississippian | — | |
| Canyon | — | |
| Pennsylvanian | — | |
| Spraberry | — |
10 TOPS · FIRST 8
Chalk, G. O.42-227-39674
0.2 KM · Rover Petroleum Operating, LLC · Section with this well →
| Mississippian | — | |
| Canyon | — | |
| Cisco | — | |
| Dean | — | |
| Ellenburger | — | |
| Leonard | — | |
| Pennsylvanian | — | |
| Strawn | — |
10 TOPS · FIRST 8
Chalk, G. O.42-227-39903
0.2 KM · Rover Petroleum Operating, LLC · Section with this well →
| Yates | 1,233 | 1,223 |
| Seven Rivers | 1,320 | 1,136 |
| San Andres | 2,100 | 356 |
| Glorieta | 2,691 | -235 |
| Clear Fork | 2,942 | -486 |
| Wolfcamp | — | |
| Coleman Junction | — | |
| Spraberry | — |
10 TOPS · FIRST 8
Chalk, Sloan42-227-39694
0.4 KM · Citation Oil & Gas Corp. · Section with this well →
| Tansill | 1,043 | |
| Yates | 1,168 | |
| Seven Rivers | 1,257 | |
| Queen | 1,452 | |
| Grayburg | 1,758 | |
| San Andres | 2,063 | |
| San Andres | 2,212 | |
| Glorieta | 2,583 |
10 TOPS · FIRST 8
Chalk, G. O.42-227-39777
0.5 KM · Rover Petroleum Operating, LLC · Section with this well →
| Yates | 1,256 | 1,199 |
| Seven Rivers | 1,340 | 1,115 |
| San Andres | 2,108 | 347 |
| Glorieta | 2,702 | -247 |
| Clear Fork | 2,957 | -502 |
| Wolfcamp | — | |
| Coleman Junction | — | |
| Dean | — |
10 TOPS · FIRST 8
Chalk, G. O.42-227-39812
0.6 KM · Rover Petroleum Operating, LLC · Section with this well →
| Seven Rivers | 1,370 | 1,088 |
| San Andres | 2,113 | 345 |
| Glorieta | 2,742 | -284 |
| Clear Fork | 3,524 | -1,066 |
| Spraberry | — | |
| Leonard | — | |
| Dean | — | |
| Coleman Junction | — |
10 TOPS · FIRST 8
Chalk, G. O.42-227-39813
0.6 KM · Rover Petroleum Operating, LLC · Section with this well →
| Yates | 1,255 | 1,210 |
| Seven Rivers | 1,346 | 1,119 |
| San Andres | 2,137 | 328 |
| Glorieta | 2,727 | -262 |
| Clear Fork | 2,976 | -511 |
| Coleman Junction | — | |
| Dean | — | |
| Spraberry | — |
10 TOPS · FIRST 8
Beyond the permit record
RRC UIC permits · H-10 reported volumes
Injection
- 0
- bbl, last 12 reported months
- 0
- bbl, all reported
- Dec 2025
- reported through
| UIC | Kind | Status | Permitted bbl/d | Max psi | Zone ft |
|---|---|---|---|---|---|
| 000118128 | H-1 Injection | Not activated | 2,000 | 1,500 | 3,000–3,900 |
MONTHLY INJECTED, BBL · H-10 · LAST 24 REPORTED MONTHS
Last 12 months 0 · prior 12 0
TexNet catalog via USGS
Seismicity near this well
- 16
- M2+ events within 10 km, last 2 years
- M2.6
- largest
A proximity count, not an attribution. How to read 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/22739867, documented in the API reference.