WELL · 42-203-34964 · DISTRICT 6
Blocker Heirs #21H
Harrison County · Carthage (Haynesville Shale) field · Producing · Horizontal
Blocker Heirs #21H (API 42-203-34964) is a horizontal well in Harrison County operated by Comstock Oil & Gas LLC, completed October 18, 2010 and listed as producing on the RRC schedule.
The RRC has issued one drilling permit, issued May 18, 2010, permitted to 13,000 ft.
It was permitted by Gmx Resources Inc. and has since transferred to Comstock Oil & Gas LLC on the wellbore schedule.
Completion filings report 5 formation tops, including James Lime, Byrd Lime, Base B Lime, Davis Sand.
No lease production has been reported under this well’s leases.
Operator of record
Permitted by GMX Resources Inc.; the EWA schedule now lists a different operator.
Frisco, TX · P-5 Y, filed Jun 4, 2026 · 237 permits on file · (800) 929-4884
SOURCE · RRC EWA WELLBORE SCHEDULE
What each RRC source says
| Wellbore schedule | Comstock Oil & Gas LLC |
| Production reports | Comstock Oil & Gas, LLCthrough Apr 2026 |
| Latest permit | GMX Resources Inc.May 18, 2010 |
The sources disagree, which usually means a transfer or a lease-level production filing by a different entity. Petrora goes with the schedule.
- 13,000
- total depth, ft
- 1
- permits on file
- May 18, 2010
- last permit issued
- Oct 18, 2010
- completed
- 0
- cumulative oil, bbl
- 2.55M
- cumulative gas, mcf
PRODUCTION FROM PDQ LEASE REPORTS · Oct 2010 THROUGH Jul 2026
Regulatory status · RRC wellbore file
- Schedule
- ON SCHEDULE
- Completed
- Oct 18, 2010
- Shut in
- —
- Plugged
- —
Operator's P-5 on the schedule: Active
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; this well is the only one on it.Why →
| Lease | Field | Reporting operator | Wells | Oil, bbl | Gas, mcf | Reported |
|---|---|---|---|---|---|---|
| Blocker Heirs G-6-261481 | Carthage (Haynesville Shale) | Comstock Oil & Gas, LLC | 1 | 0 | 2.55M | Oct 2010 – Jul 2026 |
Gas, mcf lease total
Last 12 months 123,782 · prior 12 94,824(+31%)
Chain of custody
Every operator that reported production on this well's lease, in order.
- 1GMX Resources Inc.Oct 2010 → Mar 2014
- 2Thunderbird (Texas) Resources LPApr 2014 → Sep 2017
- 3Tanos Exploration II, LLCOct 2017 → Jul 2021
- 4Diversified Production LLCAug 2021 → Nov 2021
- 5Comstock Oil & Gas, LLCDec 2021 → Apr 2026
Permits
| Permit | Type | Operator | Received | Issued | Spud | Depth |
|---|---|---|---|---|---|---|
| 695825-99 | Drill | GMX Resources Inc. | May 11, 2010 | May 18, 2010 | Jun 4, 2010 | 13,000 |
Completions
| Completed | Lease | Field | Operator | Status | Depth |
|---|---|---|---|---|---|
| — | — G-6-261481 | — | — | — | — |
Formation tops
As filed on W-2/G-1. Subsea from 331 ft elevation.Download CSV →
| Formation | MD ft | Subsea |
|---|---|---|
| James Lime | 5,866 | -5,535 |
| Byrd Lime | 6,217 | -5,886 |
| Base B Lime | 8,364 | -8,033 |
| Davis Sand | 9,111 | -8,780 |
| BLT | 9,931 | -9,600 |
Perforations
Perforated and open-hole intervals.
| From | To | Type |
|---|---|---|
| 11,005 | 16,457 | Perforated |
Casing
Strings as reported, shallowest first.
| Casing in | Set at | Hole in | Cement |
|---|---|---|---|
| 13.375 | 1,500 | 17.5 | 1,300 S |
| 7.875 | 10,395 | 9.875 | 1,012 S |
| 5.5 | 16,555 | 6.75 | 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 | Dec 5, 2011 | Feb 25, 2011 | Yes |
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 42-203-34964 → W-2, G-1, plugging reports, as PDFs
- Completion packets for 42-203-34964 → 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/20334964, documented in the API reference.