TEXAS · WELLS · JACK COUNTY · HENDERSON LEASE · API 42-237-39459 · DISTRICT 7C
Henderson #9C
Jack County · Jack County Regular field · Producing · Vertical
Henderson #9C (API 42-237-39459) is a well in Jack County operated by Mammoth Operating LLC, completed October 24, 2011 and listed as producing on the RRC schedule.
The RRC has issued one drilling permit, issued August 26, 2011, permitted to 461 ft.
It was permitted by Comstock Energy, LLC and has since transferred to Mammoth Operating LLC on the wellbore schedule.
Completion filings report one formation top, including Gunsight.
Its lease has reported 12.4K barrels of oil and 225 mcf of gas since January 1993, last reporting volume in April 2026. The lease carries 29 wells, so these are lease totals, not this well alone.
Operator of record
Permitted by Comstock Energy, LLC; the EWA schedule now lists a different operator.
- Based in
- Spicewood, TX
- P-5 status
- Active (A)
- P-5 last filed
- Dec 1, 2025
- Permits on file
- 2
- Phone
- (214) 624-4819
SOURCE · RRC EWA WELLBORE SCHEDULE
What each RRC source says
| Wellbore schedule | Mammoth Operating LLC |
| Production reports | Mammoth Operating LLCthrough Apr 2026 |
| Latest permit | Comstock Energy, LLCAug 26, 2011 |
The sources disagree, which usually means a transfer or a lease-level production filing by a different entity. Petrora goes with the schedule.
- 461
- total depth, ft
- 1
- permits on file
- Aug 26, 2011
- last permit issued
- Oct 24, 2011
- completed
- 12.4K
- cumulative oil, bbl
- 225
- cumulative gas, mcf
PRODUCTION FROM PDQ LEASE REPORTS · Jan 1993 THROUGH Apr 2026
Regulatory status · RRC wellbore file
- Schedule
- ON SCHEDULE
- Completed
- Oct 24, 2011
- 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 lease this well is completed on; they carry 29 wells in total, so volumes are shared.Why →
| Lease | Field | Reporting operator | Wells | Oil, bbl | Gas, mcf | Reported |
|---|---|---|---|---|---|---|
| Henderson O-13-3359 | Jack County Regular | Mammoth Operating LLC | 29 | 12.4K | 225 | Jan 1993 – Apr 2026 |
Oil, barrels lease total
Last 12 months 295 · prior 12 252(+17%)
Chain of custody
Every operator that reported production on this well's lease, in order.
- 1H & L Oil PropertiesJan 1993 → Oct 1993
- 2MT Oil PropertiesNov 1993 → Mar 2011
- 3Comstock Energy, LLCSep 2011 → Nov 2016
- 4Lode Holdings, LLCDec 2016 → Feb 2018
- 5Wineglass Production, LLCMar 2018 → Aug 2024
- 6Mammoth Operating LLCOct 2024 → Apr 2026
Permits
| Permit | Type | Operator | Received | Issued | Spud | Depth |
|---|---|---|---|---|---|---|
| 722664-99 | Drill | Comstock Energy, LLC | Aug 18, 2011 | Aug 26, 2011 | Oct 24, 2011 | 450 |
Completions
| Completed | Lease | Field | Operator | Status | Depth |
|---|---|---|---|---|---|
| Oct 24, 2011 | Henderson O-13-3359 | Jack County Regular | Mammoth Operating LLC | Producing | 461 |
Formation tops
As filed on W-2/G-1. Download CSV →
Casing
Strings as reported, shallowest first.
| Casing in | Set at | Hole in | Cement |
|---|---|---|---|
| 4.5 | 450 | 7.875 | 200 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 | Jan 7, 2016 | Dec 2, 2015 | Yes |
Well logs
1 log loaded from the RRC's log index, the latest received Jan 29, 2019. 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 |
|---|---|---|---|---|
| OtherSpans Gunsight | TIFF | 42 to 428 | Jan 29, 2019 | 1.96 |
"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 42-237-39459 → W-2, G-1, plugging reports, as PDFs
- Completion packets for 42-237-39459 → 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/23739459, documented in the API reference.