TEXAS · WELLS · ATASCOSA COUNTY · MIDDLE MCCOWEN LEASE · API 42-013-35070 · DISTRICT 01

Middle McCowen #112H

Atascosa County · Eagleville (Eagle Ford-1) field · Producing · Horizontal

Middle Mccowen #112H (API 42-013-35070) is a horizontal well in Atascosa County operated by Marathon Oil EF LLC, completed April 20, 2024 and listed as producing on the RRC schedule.

The RRC has issued one drilling permit (amended once), issued June 30, 2014, permitted to 10,779 ft.

Completion filings report 12 formation tops, including Queen City, Cook Mountain, Carrizo, Reklaw.

Its lease has reported 30.4M barrels of oil and 24.8M mcf of gas since August 2011, last reporting volume in April 2026. The lease carries 125 wells, so these are lease totals, not this well alone.

Operator of record

Marathon Oil EF LLC

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

Watch this operator Watch Atascosa County

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 LLCJun 30, 2014

10,779: total depth, ft
2: permits on file
Jun 30, 2014: last permit issued
Apr 20, 2024: completed
30.4M: cumulative oil, bbl
24.8M: cumulative gas, mcf

PRODUCTION FROM PDQ LEASE REPORTS · Sep 2011 THROUGH Apr 2026

Regulatory status · RRC wellbore file

Schedule: ON SCHEDULE
Completed: Apr 20, 2024
Shut in: —
Plugged: —

Operator's P-5 on the schedule: Active – Extension (X)

Surface location

28.663211, -98.373761 NAD27, as filed

28.663474, -98.374052 WGS84

Google Maps ↗

Permit surface location from the RRC GIS record, referenced to NAD27 as the RRC files it; the WGS84 pair is the same point through NOAA's NADCON grid, and the map link uses it, in Atascosa County.

Wells nearby

Withinmiles

Every well with a location on file around this one, in any state, nearest first.

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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; they carry 125 wells in total, so volumes are shared.Why →

Lease	Field	Reporting operator	Wells	Oil, bbl	Gas, mcf	Reported
Middle McCowen O-1-15638	Eagleville (Eagle Ford-1)	Marathon Oil EF LLC	125	30.4M	24.8M	Aug 2011 – Apr 2026

Oil, barrels lease total

Last 12 months 4,281,756 · prior 12 5,967,262(-28%)

Gas, mcf lease total

Last 12 months 3,027,282 · prior 12 4,175,011(-27%)

Chain of custody

Every operator that reported production on this well's lease, in order.

1Hilcorp Energy CompanySep 2011 → Oct 2011
2Marathon Oil EF LLCNov 2011 → Apr 2026

Permits

Permit	Type	Operator	Received	Issued	Spud	Depth
788117-98	Drill	Marathon Oil EF LLC	Oct 5, 2023	Jun 30, 2014	Nov 2, 2014	18,000
788117-99	Drill	Marathon Oil EF LLC	May 28, 2014	Jun 30, 2014	Nov 2, 2014	20,000

Completions

Completed	Lease	Field	Operator	Status	Depth
Apr 20, 2024	Middle McCowen O-1-15638	Eagleville (Eagle Ford-1)	Marathon Oil EF LLC	Producing	10,779

Formation tops

As filed on W-2/G-1. Subsea from 265 ft elevation.Download CSV →

Formation	MD ft	Subsea
Queen City	830	-565
Cook Mountain	1,278	-1,013
Carrizo	1,580	-1,315
Reklaw	1,900	-1,635
Queen City	2,202	-1,937
Reklaw	2,847	-2,582
Bartosh	3,150	-2,885
Carrizo	3,616	-3,351
Wilcox	3,718	-3,453
WilcoxWILCOX - DISPOSAL	3,718	-3,453
Wilcox	4,660	-4,395
WilcoxWILCOX - DISPOSAL	4,660	-4,395
Anacacho	10,049	-9,784
AnacachoANACACHO - H2S	10,049	-9,784
Austin Chalk	10,310	-10,045
Austin ChalkAUSTIN CHALK - H2S, DISPOSAL	10,310	-10,045
Eagle Ford	10,455	-10,190
AnacachoANACACHO - H2S	—	—
Austin ChalkAUSTIN CHALK - H2S, DISPOSAL	—	—
Bartosh	—	—
Eagle FordEAGLE FORD - H2S	—	—
EscondidoESCONDIDO - H2S, DISPOSAL	—	—
NavarroNAVARRO - H2S	—	—
OlmosOLMOS - DISPOSAL	—	—

Perforations

Perforated and open-hole intervals.

From	To	Type
10,761	19,323	Perforated

Casing

Strings as reported, shallowest first.

Casing in	Set at	Hole in	Cement
9.625	4,986	12.25	1,730 S
5.5	19,323	8.5	3,890 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 →

RRC record date	W-2 / G-1 date	Logs referenced
Sep 26, 2024	Jul 22, 2024	—
Mar 18, 2024	Feb 12, 2024	Yes
Oct 30, 2023	Sep 26, 2023	—
Aug 9, 2016	Jul 27, 2016	—
Jun 27, 2016	May 12, 2016	—

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 42-013-35070 → W-2, G-1, plugging reports, as PDFs
Completion packets for 42-013-35070 → scanned completion filings

Log images filed since 2004 open from the RRC's log search for this well; none are loaded here for it.

Find logs withinmiles of this well:List →Map →

Nearby wells and their tops

NEAREST 8 LOCATED WELLS WITH TOPS · WITHIN 16 KM

Draw a cross-section

This well's tops beside its 5 nearest neighbors, subsea-aligned so they line up regardless of surface terrain.

Open the cross-section →

Middle McCowen42-013-36092

0.0 KM · Marathon Oil EF LLC · Section with this well →

Cook Mountain	1,278	-1,013
Queen City	2,202	-1,937
Reklaw	2,847	-2,582
Carrizo	3,616	-3,351
Wilcox	3,718	-3,453
Anacacho	10,119	-9,854
Austin Chalk	10,302	-10,037
Bartosh	—

11 TOPS · FIRST 8

Middle McCowen42-013-35071

0.0 KM · Marathon Oil EF LLC · Section with this well →

Cook Mountain	1,248	-983
Queen City	1,932	-1,667
Reklaw	2,817	-2,552
Carrizo	3,532	-3,267
Wilcox	3,684	-3,419
Wilcox	3,684	-3,419
Anacacho	10,048	-9,783
Anacacho	10,048	-9,783

15 TOPS · FIRST 8

Middle McCowen42-013-36091

0.0 KM · Marathon Oil EF LLC · Section with this well →

Queen City	2,202	-1,937
Reklaw	2,847	-2,582
Carrizo	3,616	-3,351
Wilcox	3,718	-3,453
Anacacho	10,082	-9,817
Austin Chalk	10,302	-10,037
Bartosh	—
Navarro	—

10 TOPS · FIRST 8

Middle McCowen42-013-35072

0.0 KM · Marathon Oil EF LLC · Section with this well →

Queen City	830	-565
Cook Mountain	1,278	-1,013
Carrizo	1,580	-1,315
Reklaw	1,900	-1,635
Bartosh	3,150	-2,885
Barthosh	3,150	-2,885
Wilcox	3,718	-3,453
Wilcox	3,718	-3,453

16 TOPS · FIRST 8

Middle McCowen42-013-35076

0.0 KM · Marathon Oil EF LLC · Section with this well →

Queen City	830	-566
Reklaw	1,900	-1,636
Carrizo	1,900	-1,636
Bartosh	3,150	-2,886
Wilcox	3,718	-3,454
Anacacho	10,045	-9,781
Austin Chalk	10,304	-10,040
Escondido	—

10 TOPS · FIRST 8

Middle McCowen42-013-36094

0.0 KM · Marathon Oil EF LLC · Section with this well →

Cook Mountain	1,278	-1,013
Queen City	2,202	-1,937
Reklaw	2,847	-2,582
Carrizo	3,616	-3,351
Wilcox	3,718	-3,453
Anacacho	10,069	-9,804
Austin Chalk	10,314	-10,049
Eagle Ford	10,459	-10,194

12 TOPS · FIRST 8

Middle McCowen42-013-35078

0.0 KM · Marathon Oil EF LLC · Section with this well →

Queen City	830	-565
Cook Mountain	1,278	-1,013
Carrizo	1,580	-1,315
Reklaw	1,900	-1,635
Bartosh	3,150	-2,885
Wilcox	3,718	-3,453
Wilcox	3,718	-3,453
Anacacho	10,068	-9,803

19 TOPS · FIRST 8

Middle McCowen42-013-36093

0.0 KM · Marathon Oil EF LLC · Section with this well →

Queen City	2,202	-1,938
Reklaw	2,847	-2,583
Carrizo	3,616	-3,352
Wilcox	3,718	-3,454
Anacacho	10,053	-9,789
Austin Chalk	10,315	-10,051
Bartosh	—
Olmos	—

10 TOPS · FIRST 8

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

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