WELL · 42-013-35809 · DISTRICT 1

Kellner Jonas-Mutz Unit SA4 #4H

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

Kellner Jonas-Mutz Unit Sa4 #4H (API 42-013-35809) is a horizontal well in Atascosa County operated by Marathon Oil EF LLC, completed November 19, 2022 and listed as producing on the RRC schedule.

The RRC has issued one drilling permit (amended once), issued March 13, 2020, permitted to 24,000 ft.

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

Its lease has reported 314K barrels of oil and 629K mcf of gas since October 2021, last reporting in July 2026.

Operator of record

Marathon Oil EF LLC

Houston, TX · P-5 Y, filed Aug 4, 2025 · 3,191 permits on file · (800) 332-9449

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 LLCMar 13, 2020

24,000: total depth, ft
2: permits on file
Mar 13, 2020: last permit issued
Nov 19, 2022: completed
314K: cumulative oil, bbl
629K: cumulative gas, mcf

PRODUCTION FROM PDQ LEASE REPORTS · Oct 2021 THROUGH Jul 2026

Regulatory status · RRC wellbore file

Schedule: ON SCHEDULE
Completed: Nov 19, 2022
Shut in: —
Plugged: —

Operator's P-5 on the schedule: Active

Surface location

28.795378, -98.113125

OpenStreetMap → · Google Maps →

Permit surface location from the RRC GIS record, in Atascosa County.

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
Kellner Jonas-Mutz Unit SA4 O-1-20503	Eagleville (Eagle Ford-1)	Marathon Oil EF LLC	1	314K	629K	Oct 2021 – Jul 2026

Oil, barrels lease total

Last 12 months 18,627 · prior 12 39,037(-52%)

Gas, mcf lease total

Last 12 months 53,526 · prior 12 90,084(-41%)

Chain of custody

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

1Marathon Oil EF LLCJul 2022 → Apr 2026

Permits

Permit	Type	Operator	Received	Issued	Spud	Depth
862719-98	Drill	Marathon Oil EF LLC	Oct 22, 2020	Mar 13, 2020	Sep 5, 2021	24,000
862719-99	Drill	Marathon Oil EF LLC	Mar 12, 2020	Mar 13, 2020	Sep 4, 2021	22,000

Completions

Completed	Lease	Field	Operator	Status	Depth
—	— O-1-20503	—	—	—	—

Formation tops

As filed on W-2/G-1. Subsea from 430 ft elevation.Download CSV →

Formation	MD ft	Subsea
Queen City	2,913	-2,483
Reklaw	3,684	-3,254
Carrizo	4,188	-3,758
WilcoxWILCOX - DISPOSAL	4,527	-4,097
AnacachoANACACHO - H2S	10,611	-10,181
Austin ChalkAUSTIN CHALK - H2S, DISPOSAL	10,762	-10,332
Bartosh	—	—
EscondidoESCONDIDO - H2S, DISPOSAL	—	—
NavarroNAVARRO - H2S	—	—
OlmosOLMOS - DISPOSAL	—	—

Perforations

Perforated and open-hole intervals.

From	To	Type
11,287	21,807	Perforated

Casing

Strings as reported, shallowest first.

Casing in	Set at	Hole in	Cement
9.625	5,233	12.25	1,520 S
6	21,807	8.75	3,577 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. About these reports →

Filed	W-2 / G-1 date	Logs referenced
Mar 30, 2023	Mar 23, 2023	Yes
Sep 15, 2022	Jul 13, 2022	—
Nov 10, 2021	Oct 5, 2021	Yes

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 42-013-35809 → W-2, G-1, plugging reports, as PDFs
Completion packets for 42-013-35809 → scanned completion filings

Log images are in archives with no per-well link: the RRC's Neubus archive (2004 onward). then paste it into their search.

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 neighbours, subsea-aligned so they line up regardless of surface terrain.

Open the cross-section →

Kellner-Jonas Unit42-013-35808

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

Queen City	2,913	-2,482
Reklaw	3,684	-3,253
Carrizo	4,188	-3,757
Wilcox	4,527	-4,096
Anacacho	10,618	-10,187
Austin Chalk	10,764	-10,333
Escondido	—
Olmos	—

12 TOPS · FIRST 8

Kellner-Jonas Unit42-013-35810

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

Queen City	2,913	-2,482
Reklaw	3,684	-3,253
Wilcox	4,188	-3,757
Anacacho	10,328	-9,897
Austin Chalk	10,767	-10,336
Bartosh	—
Olmos	—
Navarro	—

10 TOPS · FIRST 8

Kellner-Jonas Unit42-013-35807

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

Queen City	2,913	-2,482
Reklaw	3,684	-3,253
Carrizo	4,188	-3,757
Wilcox	4,527	-4,096
Anacacho	10,613	-10,182
Austin Chalk	10,763	-10,332
Olmos	—
Navarro	—

10 TOPS · FIRST 8

Hierholzer-Chapman SA42-013-36039

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

Queen City	3,266	-2,869
Reklaw	3,798	-3,401
Carrizo	4,446	-4,049
Wilcox	4,504	-4,107
Anacacho	10,591	-10,194
Austin Chalk	10,751	-10,354
Eagle Ford	10,902	-10,505
Navarro	—

11 TOPS · FIRST 8

Hierholzer Seewald Retzloff SA442-013-36038

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

Sparta	2,964	-2,567
Queen City	3,266	-2,869
Reklaw	3,798	-3,401
Carrizo	4,446	-4,049
Wilcox	4,505	-4,108
Anacacho	10,589	-10,192
Austin Chalk	10,745	-10,348
Navarro	—

11 TOPS · FIRST 8

Hierholzer Seewald Retzloff SA342-013-36037

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

Sparta	2,964	-2,567
Queen City	3,266	-2,869
Reklaw	3,798	-3,401
Carrizo	4,446	-4,049
Wilcox	4,504	-4,107
Anacacho	10,586	-10,189
Austin Chalk	10,735	-10,338
Olmos	—

11 TOPS · FIRST 8

Chapman Rothe Unit42-013-35419

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

Queen City	2,883	-2,457
Reklaw	3,458	-3,032
Bartosh	3,711	-3,285
Carrizo	4,129	-3,703
Wilcox	5,545	-5,119
Navarro	8,695	-8,269
Olmos	9,082	-8,656
Anacacho	10,425	-9,999

10 TOPS · FIRST 8

Chapman Rothe Unit42-013-35420

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

Queen City	2,883	-2,457
Reklaw	3,458	-3,032
Bartosh	3,711	-3,285
Carrizo	4,129	-3,703
Wilcox	5,545	-5,119
Navarro	8,695	-8,269
Olmos	9,082	-8,656
Anacacho	10,426	-10,000

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

Developers: this page as JSON is GET /v1/data/wells/01335809, documented in the API reference.