TEXAS · WELLS · KARNES COUNTY · MENSIK 01 LEASE · API 42-255-33100 · DISTRICT 02
Mensik 01 #03H
Karnes County · Sugarkane (Eagle Ford) field · Producing · Horizontal
Mensik 01 #03H (API 42-255-33100) is a horizontal well in Karnes County operated by Marathon Oil EF LLC, completed September 28, 2014 and listed as producing on the RRC schedule, shut in June 1, 2026.
The RRC has issued one drilling permit, issued May 3, 2013, permitted to 12,937 ft.
It was permitted by Pioneer Natural Res. USA, Inc. and has since transferred to Marathon Oil EF LLC on the wellbore schedule.
Completion filings report 10 formation tops, including Midway, Austin Chalk, Eagle Ford, Carrizo.
Its lease has reported 300K barrels of oil and 951K mcf of gas since January 2014, last reporting volume in May 2026.
Operator of record
Permitted by Pioneer Natural Res. USA, Inc.; the EWA schedule now lists a different operator.
- Based in
- Houston, TX
- P-5 status
- Active – Extension (X)
- P-5 last filed
- Oct 13, 2026
- 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 May 2026 |
| Latest permit | Pioneer Natural Res. USA, Inc.May 3, 2013 |
The sources disagree, which usually means a transfer or a lease-level production filing by a different entity. Petrora goes with the schedule.
- 12,937
- total depth, ft
- 1
- permits on file
- May 3, 2013
- last permit issued
- Sep 28, 2014
- completed
- 300K
- cumulative oil, bbl
- 951K
- cumulative gas, mcf
PRODUCTION FROM PDQ LEASE REPORTS · JAN 2014 THROUGH MAY 2026
Regulatory status · RRC wellbore file
- Schedule
- ON SCHEDULE
- Completed
- Sep 28, 2014
- Shut in
- Jun 1, 2026
- 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 AUG 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 |
|---|---|---|---|---|---|---|
| Mensik 01 G-2-271814 | Sugarkane (Eagle Ford) | Marathon Oil EF LLC | 1 | 300K | 951K | Jan 2014 – May 2026 |
Gas, mcf lease total
Last 12 months 6,246 · prior 12 8,686(-28%)
Wells named Mensik 01
Marathon Oil EF LLC's other wells filed under this lease name in Karnes 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.
- 1Pioneer Natural Res. USA, Inc.Jan 2014 → Sep 2019
- 2Ensign Operating LLCOct 2019 → Feb 2023
- 3Marathon Oil EF LLCMar 2023 → May 2026
Permits
| Permit | Type | Operator | Received | Issued | Spud | Depth |
|---|---|---|---|---|---|---|
| 759866-99 | Drill | Pioneer Natural Res. USA, Inc. | Apr 1, 2013 | May 3, 2013 | Sep 6, 2013 | 21,000 |
Completions
| Completed | Lease | Field | Operator | Status | Depth |
|---|---|---|---|---|---|
| Sep 28, 2014 | Mensik 01 G-2-271814 | Sugarkane (Eagle Ford) | Marathon Oil EF LLC | Producing · shut in Jun 1, 2026 | 12,937 |
Formation tops
As filed on W-2/G-1. Subsea from 322 ft elevation.Download CSV →
| Formation | MD ft | Subsea |
|---|---|---|
| Midway | 9,026 | -8,704 |
| Austin ChalkAUSTIN CHALK - H2S | 12,620 | -12,298 |
| Austin ChalkAUSTIN CHALK UPPER | 12,620 | -12,298 |
| Eagle Ford | 12,916 | -12,594 |
| Eagle FordEAGLE FORD - H2S | 12,916 | -12,594 |
| Carrizo | — | — |
| EdwardsEDWARDS - H2S | — | — |
| FrioFRIO - DISPOSAL | — | — |
| Queen City | — | — |
| Reklaw | — | — |
| WilcoxWILCOX - DISPOSAL | — | — |
| YeguaYEGUA - DISPOSAL | — | — |
Perforations
Perforated and open-hole intervals.
| From | To | Type |
|---|---|---|
| 13,169 | 18,231 | Perforated |
Casing
Strings as reported, shallowest first.
| Casing in | Set at | Hole in | Cement |
|---|---|---|---|
| 13.375 | 750 | 17.5 | 840 S |
| 9.625 | 9,369 | 12.25 | 600 S |
| 5.5 | 18,372 | 8.5 | 1,881 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 30, 2014 | Oct 9, 2014 | Yes |
| 00 | Apr 11, 2014 | Mar 17, 2014 | Yes |
Well logs
1 log loaded from the RRC's log index, the latest received Sep 23, 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 Midway, Austin Chalk, Eagle Ford | TIFF | 7,400 to 13,208 | Sep 23, 2016run Nov 12, 2013 | 1.57 |
"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 42-255-33100 → W-2, G-1, plugging reports, as PDFs
- Completion packets for 42-255-33100 → 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/25533100, documented in the API reference.