TEXAS · WELLS · ATASCOSA COUNTY · MIDDLE MCCOWEN LEASE · API 42-013-35953 · DISTRICT 01

Middle McCowen #119H

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

Middle Mccowen #119H (API 42-013-35953) is a horizontal well in Atascosa County operated by Marathon Oil EF LLC, completed July 23, 2023 and listed as producing on the RRC schedule.

The RRC has issued one drilling permit, issued November 16, 2022, permitted to 10,708 ft.

Completion filings report 10 formation tops, including Queen City, Reklaw, Carrizo, Wilcox.

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 LLCNov 16, 2022

10,708: total depth, ft
1: permits on file
Nov 16, 2022: last permit issued
Jul 23, 2023: 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: Jul 23, 2023
Shut in: —
Plugged: —

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

Surface location

28.667814, -98.367231 NAD27, as filed

28.668077, -98.367521 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.

Loading the wells nearby…

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
885602-99	Drill	Marathon Oil EF LLC	Nov 8, 2022	Nov 16, 2022	Nov 29, 2022	22,000

Completions

Completed	Lease	Field	Operator	Status	Depth
Jul 23, 2023	Middle McCowen O-1-15638	Eagleville (Eagle Ford-1)	Marathon Oil EF LLC	Producing	10,708

Formation tops

As filed on W-2/G-1. Subsea from 250 ft elevation.Download CSV →

Formation	MD ft	Subsea
Queen City	2,379	-2,129
Reklaw	2,818	-2,568
Carrizo	3,585	-3,335
WilcoxWILCOX - DISPOSAL	3,683	-3,433
AnacachoANACACHO - H2S	10,033	-9,783
Austin ChalkAUSTIN CHALK - H2S, DISPOSAL	10,283	-10,033
Bartosh	—	—
EscondidoESCONDIDO - H2S, DISPOSAL	—	—
NavarroNAVARRO - H2S	—	—
OlmosOLMOS - DISPOSAL	—	—

Perforations

Perforated and open-hole intervals.

From	To	Type
10,792	18,756	Perforated

Casing

Strings as reported, shallowest first.

Casing in	Set at	Hole in	Cement
9.625	5,058	12.25	1,239 S
6	18,756	8.75	3,000 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 18, 2023	Sep 7, 2023	Yes
Sep 12, 2023	Aug 30, 2023	—
Apr 6, 2023	Mar 23, 2023	Yes

Well logs

1 log loaded from the RRC's log index, the latest received Nov 25, 2025. 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 Queen City, Reklaw, Carrizo, Wilcox, Anacacho, Austin Chalk	TIFF	0 to 18,774	Nov 25, 2025	5.24

"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 42-013-35953 → W-2, G-1, plugging reports, as PDFs
Completion packets for 42-013-35953 → 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 McCowen42-013-35952

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

Queen City	2,379	-2,128
Reklaw	2,818	-2,567
Carrizo	3,585	-3,334
Wilcox	3,683	-3,432
Anacacho	10,039	-9,788
Austin Chalk	10,286	-10,035
Olmos	—
Bartosh	—

10 TOPS · FIRST 8

Middle McCowen42-013-35951

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

Queen City	2,379	-2,128
Reklaw	2,818	-2,567
Carrizo	3,585	-3,334
Wilcox	3,683	-3,432
Anacacho	10,044	-9,793
Austin Chalk	10,303	-10,052
Escondido	—
Olmos	—

10 TOPS · FIRST 8

Middle McCowen42-013-35950

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

Queen City	2,379	-2,128
Reklaw	2,818	-2,567
Carrizo	3,585	-3,334
Wilcox	3,683	-3,432
Anacacho	10,043	-9,792
Austin Chalk	10,273	-10,022
Olmos	—
Navarro	—

10 TOPS · FIRST 8

Middle McCowen42-013-35949

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

Queen City	2,379	-2,098
Reklaw	2,818	-2,537
Carrizo	3,585	-3,304
Wilcox	3,683	-3,402
Anacacho	10,017	-9,736
Austin Chalk	10,223	-9,942
Olmos	—
Bartosh	—

10 TOPS · FIRST 8

Middle McCowen42-013-36103

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

Queen City	2,172	-1,922
Reklaw	2,817	-2,567
Carrizo	3,586	-3,336
Wilcox	3,684	-3,434
Anacacho	10,036	-9,786
Austin Chalk	10,297	-10,047
Escondido	—
Navarro	—

10 TOPS · FIRST 8

Middle McCowen42-013-36099

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

Cook Mountain	1,248	-997
Queen City	2,172	-1,921
Reklaw	2,817	-2,566
Carrizo	3,586	-3,335
Wilcox	3,684	-3,433
Anacacho	10,109	-9,858
Austin Chalk	10,290	-10,039
Olmos	—

11 TOPS · FIRST 8

Middle McCowen42-013-36101

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

Cook Mountain	1,248	-998
Queen City	2,172	-1,922
Reklaw	2,817	-2,567
Carrizo	3,586	-3,336
Wilcox	3,684	-3,434
Anacacho	10,048	-9,798
Austin Chalk	10,301	-10,051
Olmos	—

11 TOPS · FIRST 8

Middle McCowen42-013-36102

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

Cook Mountain	1,248	-998
Queen City	2,172	-1,922
Reklaw	2,817	-2,567
Carrizo	3,586	-3,336
Wilcox	3,684	-3,434
Wilcox	3,684	-3,434
Anacacho	10,058	-9,808
Anacacho	10,058	-9,808

15 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/01335953, documented in the API reference.