TEXAS · WELLS · PARKER COUNTY · MADDUX, HENRY GU LEASE · API 42-367-34798 · DISTRICT 7C
Maddux Henry GU #4H
Parker County · Newark East (Barnett Shale) field · Producing · Horizontal
Maddux Henry GU #4H (API 42-367-34798) is a horizontal well in Parker County operated by Formentera Operations LLC, completed December 30, 2008 and listed as producing on the RRC schedule, shut in May 1, 2020.
The RRC has issued one drilling permit, issued July 28, 2008, permitted to 5,521 ft.
It was permitted by Devon Energy Production CO, L.P. and has since transferred to Formentera Operations LLC on the wellbore schedule.
Completion filings report 2 formation tops, including Marble Falls, Barnett.
Its lease has reported 668 barrels of oil and 471K mcf of gas since December 2008, last reporting volume in January 2026.
Operator of record
Permitted by Devon Energy Production Co, L.P.; the EWA schedule now lists a different operator.
- Based in
- Austin, TX
- P-5 status
- Active – Extension (X)
- P-5 last filed
- Jun 11, 2026
- Permits on file
- 93
- Phone
- (512) 514-5779
SOURCE · RRC EWA WELLBORE SCHEDULE
What each RRC source says
| Wellbore schedule | Formentera Operations LLC |
| Production reports | Formentera Operations LLCthrough Jan 2026 |
| Latest permit | Devon Energy Production Co, L.P.Jul 28, 2008 |
The sources disagree, which usually means a transfer or a lease-level production filing by a different entity. Petrora goes with the schedule.
- 5,521
- total depth, ft
- 1
- permits on file
- Jul 28, 2008
- last permit issued
- Dec 30, 2008
- completed
- 668
- cumulative oil, bbl
- 471K
- cumulative gas, mcf
PRODUCTION FROM PDQ LEASE REPORTS · Dec 2008 THROUGH Jan 2026
Regulatory status · RRC wellbore file
- Schedule
- ON SCHEDULE
- Completed
- Dec 30, 2008
- Shut in
- May 1, 2020
- 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; this well is the only one on it.Why →
| Lease | Field | Reporting operator | Wells | Oil, bbl | Gas, mcf | Reported |
|---|---|---|---|---|---|---|
| Maddux, Henry GU G-13-249281 | Newark, East (Barnett Shale) | Formentera Operations LLC | 1 | 668 | 471K | Dec 2008 – Jan 2026 |
Gas, mcf lease total
Last 12 months 737 · prior 12 190(+288%)
Chain of custody
Every operator that reported production on this well's lease, in order.
- 1Devon Energy Production Co, L.P.Dec 2008 → Apr 2018
- 2FDL Operating, LLCMay 2018 → Apr 2020
- 3Javelin Energy Partners Mgmt LLCApr 2022 → Nov 2025
- 4Formentera Operations LLCDec 2025 → Jan 2026
Permits
| Permit | Type | Operator | Received | Issued | Spud | Depth |
|---|---|---|---|---|---|---|
| 666157-99 | Drill | Devon Energy Production Co, L.P. | Jul 7, 2008 | Jul 28, 2008 | Aug 7, 2008 | 9,000 |
Completions
| Completed | Lease | Field | Operator | Status | Depth |
|---|---|---|---|---|---|
| Dec 30, 2008 | Maddux Henry GU G-13-249281 | Newark East (Barnett Shale) | Formentera Operations LLC | Producing · shut in May 1, 2020 | 5,521 |
Formation tops
As filed on W-2/G-1. Subsea from 1,043 ft elevation.Download CSV →
| Formation | MD ft | Subsea |
|---|---|---|
| Marble Falls | 5,090 | -4,047 |
| Marble FallsLOWER MARBLE FALLS | 5,220 | -4,177 |
| BarnettUPPER BARNETT SHALE | 5,448 | -4,405 |
Perforations
Perforated and open-hole intervals.
| From | To | Type |
|---|---|---|
| 6,060 | 6,331 | Perforated |
| 6,430 | 6,701 | Perforated |
| 6,800 | 7,071 | Perforated |
| 7,170 | 7,441 | Perforated |
Casing
Strings as reported, shallowest first.
| Casing in | Set at | Hole in | Cement |
|---|---|---|---|
| 9.625 | 539 | 12.25 | 230 S |
| 5.5 | 7,520 | 8.5 | 940 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 | Aug 24, 2009 | Mar 2, 2009 | Yes |
| 00 | Jul 15, 2009 | — | — |
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 42-367-34798 → W-2, G-1, plugging reports, as PDFs
- Completion packets for 42-367-34798 → scanned completion filings
Log images filed since 2004 open from the RRC's log search for this well; none are loaded here 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/36734798, documented in the API reference.