TEXAS · WELLS · MCMULLEN COUNTY · MIDDLE MCCOWEN LEASE · API 42-311-36935 · DISTRICT 01

Middle McCowen #102H

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

Middle Mccowen #102H (API 42-311-36935) is a horizontal well in Mcmullen County operated by Marathon Oil EF LLC, completed November 16, 2019 and listed as producing on the RRC schedule.

The RRC has issued one drilling permit, issued January 28, 2019, permitted to 10,469 ft.

Completion filings report 10 formation tops, including Yegua, Wilcox, Navarro, Olmos.

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 McMullen 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 LLCJan 28, 2019

10,469: total depth, ft
1: permits on file
Jan 28, 2019: last permit issued
Nov 16, 2019: 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: Nov 16, 2019
Shut in: —
Plugged: —

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

Surface location

28.645839, -98.370850 NAD27, as filed

28.646103, -98.371141 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 McMullen County.

Wells nearby

Withinmiles

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

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Open the full map →

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
849164-99	Drill	Marathon Oil EF LLC	Jan 24, 2019	Jan 28, 2019	Jun 15, 2019	24,000

Completions

Completed	Lease	Field	Operator	Status	Depth
Nov 16, 2019	Middle McCowen O-1-15638	Eagleville (Eagle Ford-1)	Marathon Oil EF LLC	Producing	10,469

Formation tops

As filed on W-2/G-1. Subsea from 326 ft elevation.Download CSV →

Formation	MD ft	Subsea
YeguaYEGUA - DISPOSAL	2,688	-2,362
WilcoxWILCOX - DISPOSAL	5,096	-4,770
Navarro	8,054	-7,728
Olmos	8,756	-8,430
Anacacho	10,319	-9,993
Austin Chalk	10,569	-10,243
Eagle FordEAGLE FORD - H2S	10,690	-10,364
CatahoulaCATAHOULA - DISPOSAL	—	—
Escondido	—	—
FrioFRIO - DISPOSAL	—	—
YeguaYEGUA - DISPOSAL	—	—

Perforations

Perforated and open-hole intervals.

From	To	Type
10,969	22,280	Perforated

Casing

Strings as reported, shallowest first.

Casing in	Set at	Hole in	Cement
9.625	5,064	12.25	1,636 S
5.5	22,387	8.75	4,133 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
Apr 24, 2020	Feb 24, 2020	Yes
Nov 13, 2019	Aug 22, 2019	Yes
Jun 4, 2019	May 22, 2019	Yes

Well logs

2 logs loaded from the RRC's log index, the latest received Aug 16, 2022. Gamma ray. 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
Gamma RaySpans Wilcox, Navarro, Olmos, Anacacho, Austin Chalk, Eagle Ford	TIFF	7,058 to 22,363	Aug 16, 2022	3.88
Gamma RaySpans Wilcox, Navarro, Olmos, Anacacho, Austin Chalk, Eagle Ford	TIFF	7,058 to 22,363	May 23, 2022	6.20

"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.

Find logs withinmiles of this well:List →Map →

Search the well logs loaded into Petrora →

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 42-311-36935 → W-2, G-1, plugging reports, as PDFs
Completion packets for 42-311-36935 → scanned completion filings

The logs loaded for this well are under Well logs, with the RRC's log search for it.

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 McCowen42-311-36934

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

Yegua	2,688	-2,362
Wilcox	5,096	-4,770
Navarro	8,054	-7,728
Olmos	8,756	-8,430
Anacacho	10,304	-9,978
Austin Chalk	10,559	-10,233
Eagle Ford	10,678	-10,352
Escondido	—

10 TOPS · FIRST 8

Middle McCowen42-311-36933

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

Wilcox	5,096	-4,770
Navarro	8,054	-7,728
Olmos	8,756	-8,430
Anacacho	10,272	-9,946
Austin Chalk	10,542	-10,216
Eagle Ford	10,662	-10,336
Yegua	—
Frio	—

10 TOPS · FIRST 8

Middle McCowen42-311-36932

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

Wilcox	5,096	-4,770
Navarro	8,054	-7,728
Olmos	8,756	-8,430
Anacacho	10,244	-9,918
Austin Chalk	10,533	-10,207
Eagle Ford	10,654	-10,328
Frio	—
Yegua	—

10 TOPS · FIRST 8

Middle McCowen42-311-36734

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

Catahoula	2,353	-2,016
Frio	2,569	-2,232
Yegua	2,663	-2,326
Wilcox	5,001	-4,664
Navarro	7,970	-7,633
Olmos	8,673	-8,336
Anacacho	10,270	-9,933
Austin Chalk	10,530	-10,193

10 TOPS · FIRST 8

Middle McCowen42-311-36736

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

Catahoula	2,353	-2,016
Frio	2,569	-2,232
Yegua	2,663	-2,326
Wilcox	5,001	-4,664
Navarro	7,970	-7,633
Olmos	8,673	-8,336
Anacacho	10,250	-9,913
Austin Chalk	10,506	-10,169

10 TOPS · FIRST 8

Middle McCowen42-311-36735

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

Catahoula	2,353	-2,017
Frio	2,569	-2,233
Yegua	2,663	-2,327
Wilcox	5,001	-4,665
Navarro	7,970	-7,634
Olmos	8,673	-8,337
Anacacho	10,265	-9,929
Austin Chalk	10,525	-10,189

13 TOPS · FIRST 8

Middle McCowen42-013-36093

1.9 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
Escondido	—
Bartosh	—

10 TOPS · FIRST 8

Middle McCowen42-013-36094

1.9 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

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/31136935, documented in the API reference.