TEXAS · WELLS · ATASCOSA COUNTY · MAUCH-HENKE UNIT LEASE · API 42-013-34588 · DISTRICT 01
Mauch-Henke Unit #1H
Atascosa County · Eagleville (Eagle Ford-1) field · Producing · Horizontal
Mauch-Henke Unit #1H (API 42-013-34588) is a horizontal well in Atascosa County operated by Marathon Oil EF LLC, completed August 21, 2015 and listed as producing on the RRC schedule.
The RRC has issued one drilling permit, issued August 14, 2012, permitted to 10,506 ft.
Completion filings report 3 formation tops, including Anacacho, Austin Chalk, Eagle Ford.
Its lease has reported 124K barrels of oil and 114K mcf of gas since October 2012, last reporting volume in April 2026.
Operator of record
- Based in
- Houston, TX
- P-5 status
- Active (A)
- P-5 last filed
- Sep 26, 2025
- Permits on file
- 3,191
- Phone
- (832) 486-2737
SOURCE · RRC EWA WELLBORE SCHEDULE
What each RRC source says
| Wellbore schedule | Marathon Oil EF LLC |
| Production reports | Marathon Oil EF LLCthrough Apr 2026 |
| Latest permit | Marathon Oil EF LLCAug 14, 2012 |
- 10,506
- total depth, ft
- 1
- permits on file
- Aug 14, 2012
- last permit issued
- Aug 21, 2015
- completed
- 124K
- cumulative oil, bbl
- 114K
- cumulative gas, mcf
PRODUCTION FROM PDQ LEASE REPORTS · OCT 2012 THROUGH APR 2026
Regulatory status · RRC wellbore file
- Schedule
- ON SCHEDULE
- Completed
- Aug 21, 2015
- 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.
Wells nearby
Every well with a location on file around this well, in any state, nearest first.
Texas locations come from drilling permits, so most older Texas wells have none and are not listed.
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 |
|---|---|---|---|---|---|---|
| Mauch-Henke Unit O-1-16427 | Eagleville (Eagle Ford-1) | Marathon Oil EF LLC | 1 | 124K | 114K | Oct 2012 – Apr 2026 |
Oil, barrels lease total
Last 12 months 1,391 · prior 12 1,518(-8%)
Gas, mcf lease total
Last 12 months 144 · prior 12 734(-80%)
Wells named Mauch-Henke Unit
Marathon Oil EF LLC's other wells filed under this lease name in Atascosa County, newest permit first. The RRC gives a gas well its own lease number, so the name is what joins the wells of a unit.
Loading the lease's wellsChain of custody
Every operator that reported production on this well's lease, in order.
- 1Marathon Oil EF LLCOct 2012 → Apr 2026
Permits
| Permit | Type | Operator | Received | Issued | Spud | Depth |
|---|---|---|---|---|---|---|
| 745943-99 | Drill | Marathon Oil EF LLC | Aug 6, 2012 | Aug 14, 2012 | Sep 14, 2012 | 15,000 |
Completions
| Completed | Lease | Field | Operator | Status | Depth |
|---|---|---|---|---|---|
| Aug 21, 2015 | Mauch-Henke Unit O-1-16427 | Eagleville (Eagle Ford-1) | Marathon Oil EF LLC | Producing | 10,506 |
Formation tops
As filed on W-2/G-1. Subsea from 409 ft elevation.Download CSV →
| Formation | MD ft | Subsea |
|---|---|---|
| Anacacho | 10,360 | -9,951 |
| Austin Chalk | 10,514 | -10,105 |
| Eagle Ford | 10,679 | -10,270 |
Perforations
Perforated and open-hole intervals.
| From | To | Type |
|---|---|---|
| 10,954 | 15,744 | Perforated |
Casing
Strings as reported, shallowest first.
| Casing in | Set at | Hole in | Cement |
|---|---|---|---|
| 9.625 | 5,223 | 12.25 | 2,045 S |
| 5.5 | 15,960 | 8.75 | 2,045 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 | Feb 16, 2017 | Feb 16, 2017 | — |
| 00 | Apr 2, 2013 | Jan 10, 2013 | Yes |
Well logs
1 log loaded from the RRC's log index, the latest received Mar 8, 2016. 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 Anacacho, Austin Chalk, Eagle Ford | TIFF | 7,987 to 15,917 | Mar 8, 2016run Sep 24, 2012 | 0.92 |
"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 42-013-34588 → W-2, G-1, plugging reports, as PDFs
- Completion packets for 42-013-34588 → 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/01334588, documented in the API reference.