TEXAS · WELLS · TARRANT COUNTY · MCMAHON, MARK GU LEASE · API 42-439-34630 · DISTRICT 7C
McMahon Mark GU #1H
Tarrant County · Newark East (Barnett Shale) field · Producing · Horizontal
Mcmahon Mark GU #1H (API 42-439-34630) is a horizontal well in Tarrant County operated by Formentera Operations LLC, completed February 25, 2019 and listed as producing on the RRC schedule.
The RRC has issued one drilling permit (amended 3 times), issued December 10, 2009, permitted to 6,650 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 924K mcf of gas since September 2011, 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.Dec 10, 2009 |
The sources disagree, which usually means a transfer or a lease-level production filing by a different entity. Petrora goes with the schedule.
- 6,650
- total depth, ft
- 4
- permits on file
- Dec 10, 2009
- last permit issued
- Feb 25, 2019
- completed
- 0
- cumulative oil, bbl
- 924K
- cumulative gas, mcf
PRODUCTION FROM PDQ LEASE REPORTS · Sep 2011 THROUGH Jan 2026
Regulatory status · RRC wellbore file
- Schedule
- ON SCHEDULE
- Completed
- Feb 25, 2019
- 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; this well is the only one on it.Why →
| Lease | Field | Reporting operator | Wells | Oil, bbl | Gas, mcf | Reported |
|---|---|---|---|---|---|---|
| McMahon, Mark GU G-13-262886 | Newark, East (Barnett Shale) | Formentera Operations LLC | 1 | 0 | 924K | Sep 2011 – Jan 2026 |
Gas, mcf lease total
Last 12 months 13,702 · prior 12 19,916(-31%)
Chain of custody
Every operator that reported production on this well's lease, in order.
- 1Devon Energy Production Co, L.P.Sep 2011 → Nov 2017
- 2FDL Operating, LLCJul 2019 → Dec 2021
- 3Venado Operating Company LLCJan 2022 → Mar 2022
- 4Javelin Energy Partners Mgmt LLCApr 2022 → Nov 2025
- 5Formentera Operations LLCDec 2025 → Jan 2026
Permits
| Permit | Type | Operator | Received | Issued | Spud | Depth |
|---|---|---|---|---|---|---|
| 687213-96 | Drill | Devon Energy Production Co, L.P. | Jun 2, 2011 | Dec 10, 2009 | Jun 23, 2011 | 9,000 |
| 687213-97 | Drill | Devon Energy Production Co, L.P. | Oct 26, 2010 | Dec 10, 2009 | — | 9,000 |
| 687213-98 | Drill | Devon Energy Production Co, L.P. | Apr 15, 2010 | Dec 10, 2009 | — | 9,000 |
| 687213-99 | Drill | Devon Energy Production Co, L.P. | Nov 10, 2009 | Dec 10, 2009 | — | 9,000 |
Completions
| Completed | Lease | Field | Operator | Status | Depth |
|---|---|---|---|---|---|
| Feb 25, 2019 | McMahon Mark GU G-13-262886 | Newark East (Barnett Shale) | Formentera Operations LLC | Producing | 6,650 |
Formation tops
As filed on W-2/G-1. Subsea from 738 ft elevation.Download CSV →
| Formation | MD ft | Subsea |
|---|---|---|
| Marble Falls | 6,433 | -5,695 |
| BarnettUPPER BARNETT SHALE | 6,485 | -5,747 |
| BarnettLOWER BARNETT SHALE | 6,531 | -5,793 |
Perforations
Perforated and open-hole intervals.
| From | To | Type |
|---|---|---|
| 6,925 | 7,078 | Perforated |
| 6,925 | 9,478 | Perforated |
| 7,225 | 7,378 | Perforated |
| 7,525 | 7,678 | Perforated |
| 7,825 | 7,978 | Perforated |
| 8,125 | 8,278 | Perforated |
| 8,425 | 8,578 | Perforated |
| 8,725 | 8,878 | Perforated |
| 9,025 | 9,178 | Perforated |
| 9,375 | 9,478 | Perforated |
Casing
Strings as reported, shallowest first.
| Casing in | Set at | Hole in | Cement |
|---|---|---|---|
| 9.625 | 826 | 12.25 | 245 S |
| 5.5 | 9,616 | 8.5 | 1,025 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 | Jul 9, 2020 | Jun 30, 2020 | — |
| 00 | Apr 4, 2012 | Oct 11, 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 42-439-34630 → W-2, G-1, plugging reports, as PDFs
- Completion packets for 42-439-34630 → 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/43934630, documented in the API reference.