TEXAS · WELLS · HARRISON COUNTY · BLOCKER HEIRS LEASE · API 42-203-34907 · DISTRICT 06
Blocker Heirs #20H
Harrison County · Carthage (Haynesville Shale) field · Producing · Horizontal
Blocker Heirs #20H (API 42-203-34907) is a horizontal well in Harrison County operated by Comstock Oil & Gas LLC, completed April 8, 2010 and listed as producing on the RRC schedule.
The RRC has issued one drilling permit (amended once), issued December 17, 2009, permitted to 10,294 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.
Its lease has reported 22 barrels of oil and 2.38M mcf of gas since April 2010, last reporting volume in April 2026.
Operator of record
Permitted by GMX Resources Inc.; the EWA schedule now lists a different operator.
- Based in
- Frisco, TX
- P-5 status
- Active (A)
- P-5 last filed
- Jul 28, 2025
- Permits on file
- 239
- Phone
- (972) 668-8800
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.Dec 17, 2009 |
The sources disagree, which usually means a transfer or a lease-level production filing by a different entity. Petrora goes with the schedule.
- 10,294
- total depth, ft
- 2
- permits on file
- Dec 17, 2009
- last permit issued
- Apr 8, 2010
- completed
- 22
- cumulative oil, bbl
- 2.38M
- cumulative gas, mcf
PRODUCTION FROM PDQ LEASE REPORTS · Apr 2010 THROUGH Apr 2026
Regulatory status · RRC wellbore file
- Schedule
- ON SCHEDULE
- Completed
- Apr 8, 2010
- Shut in
- —
- Plugged
- —
Operator's P-5 on the schedule: Active – Extension (X)
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-6-258076 | Carthage (Haynesville Shale) | Comstock Oil & Gas, LLC | 1 | 22 | 2.38M | Apr 2010 – Apr 2026 |
Gas, mcf lease total
Last 12 months 71,245 · prior 12 56,732(+26%)
Chain of custody
Every operator that reported production on this well's lease, in order.
- 1GMX Resources Inc.Apr 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, LLCJan 2022 → Apr 2026
Permits
| Permit | Type | Operator | Received | Issued | Spud | Depth |
|---|---|---|---|---|---|---|
| 688709-98 | Drill | GMX Resources Inc. | Aug 12, 2010 | Dec 17, 2009 | Jan 30, 2010 | 13,000 |
| 688709-99 | Drill | GMX Resources Inc. | Dec 15, 2009 | Dec 17, 2009 | Jan 30, 2010 | 13,000 |
Completions
| Completed | Lease | Field | Operator | Status | Depth |
|---|---|---|---|---|---|
| Apr 8, 2010 | Blocker Heirs G-6-258076 | Carthage (Haynesville Shale) | Comstock Oil & Gas LLC | Producing | 10,294 |
Formation tops
As filed on W-2/G-1. Subsea from 334 ft elevation.Download CSV →
| Formation | MD ft | Subsea |
|---|---|---|
| James Lime | 5,811 | -5,477 |
| Byrd Lime | 6,209 | -5,875 |
| Base B Lime | 8,460 | -8,126 |
| Davis Sand | 9,371 | -9,037 |
| BLT | 9,781 | -9,447 |
Perforations
Perforated and open-hole intervals.
| From | To | Type |
|---|---|---|
| 11,253 | 15,631 | Perforated |
Casing
Strings as reported, shallowest first.
| Casing in | Set at | Hole in | Cement |
|---|---|---|---|
| 10.75 | 1,501 | 13.5 | 943 S |
| 7.625 | 10,294 | 9.875 | 1,490 S |
| 5.5 | 15,783 | 6.75 | 522 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 | Dec 7, 2010 | May 11, 2010 | Yes |
| 00 | Nov 30, 2010 | — | — |
Well logs
1 log loaded from the RRC's log index, the latest received Apr 2, 2013. Resistivity. 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 |
|---|---|---|---|---|
| RESISTIVITYSpans James Lime, Byrd Lime, Base B Lime, Davis Sand, Blt | TIFF | 5,500 to 11,100 | Apr 2, 2013run Mar 19, 2010 | 3.46 |
"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 42-203-34907 → W-2, G-1, plugging reports, as PDFs
- Completion packets for 42-203-34907 → 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/20334907, documented in the API reference.