WELL · 42-255-35497 · DISTRICT 2

M.-Moczygemba M.-Jonas C SA #1H

Karnes County · Eagleville (Eagle Ford-2) field · Producing · Horizontal

M.-Moczygemba M.-Jonas C SA #1H (API 42-255-35497) is a horizontal well in Karnes County operated by Marathon Oil EF LLC, completed November 13, 2018 and listed as producing on the RRC schedule.

The RRC has issued one drilling permit, issued June 13, 2017, permitted to 19,690 ft.

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

Its lease has reported 344K barrels of oil and 601K mcf of gas since September 2017, last reporting in July 2026.

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

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 13, 2017

19,690: total depth, ft
1: permits on file
Jun 13, 2017: last permit issued
Nov 13, 2018: completed
344K: cumulative oil, bbl
601K: cumulative gas, mcf

PRODUCTION FROM PDQ LEASE REPORTS · Sep 2017 THROUGH Jul 2026

Regulatory status · RRC wellbore file

Schedule: ON SCHEDULE
Completed: Nov 13, 2018
Shut in: —
Plugged: —

Operator's P-5 on the schedule: Active (A)

Surface location

28.889197, -97.983969

Google Maps ↗

Permit surface location from the RRC GIS record, in Karnes 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
M.-Moczygemba M.-Jonas C SA O-2-11475	Eagleville (Eagle Ford-2)	Marathon Oil EF LLC	1	344K	601K	Sep 2017 – Jul 2026

Oil, barrels lease total

Last 12 months 11,437 · prior 12 11,512(-1%)

Gas, mcf lease total

Last 12 months 15,648 · prior 12 30,819(-49%)

Chain of custody

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

1Marathon Oil EF LLCNov 2018 → Apr 2026

Permits

Permit	Type	Operator	Received	Issued	Spud	Depth
827119-99	Drill	Marathon Oil EF LLC	May 24, 2017	Jun 13, 2017	Sep 20, 2018	19,690

Completions

Completed	Lease	Field	Operator	Status	Depth
—	— O-2-11475	—	—	—	—

Formation tops

As filed on W-2/G-1. Subsea from 412 ft elevation.Download CSV →

Formation	MD ft	Subsea
YeguaYEGUA - DISPOSAL	1,520	-1,108
Queen City	3,535	-3,123
Reklaw	3,871	-3,459
Carrizo	4,666	-4,254
WilcoxWILCOX - DISPOSAL	5,916	-5,504
Austin ChalkAUSTIN CHALK - H2S	10,935	-10,523
Eagle FordEAGLE FORD - H2S	11,180	-10,768
EdwardsEDWARDS - H2S	—	—
FrioFRIO - DISPOSAL	—	—
SligoSLIGO - H2S	—	—

Perforations

Perforated and open-hole intervals.

From	To	Type
11,395	18,137	Perforated

Casing

Strings as reported, shallowest first.

Casing in	Set at	Hole in	Cement
9.625	5,534	12.25	1,622 S
9.625	5,588	12.25	1,622 S
5.5	18,246	8.75	3,174 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 →

Suffix	Filed	W-2 / G-1 date	Logs referenced
00	Mar 20, 2019	Dec 12, 2018	Yes
00	Aug 7, 2018	Apr 20, 2018	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 42-255-35497 → W-2, G-1, plugging reports, as PDFs
Completion packets for 42-255-35497 → 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 neighbors, subsea-aligned so they line up regardless of surface terrain.

Open the cross-section →

Medina-Jonas Unit C42-255-35498

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

Yegua	1,520	-1,108
Queen City	3,535	-3,123
Reklaw	3,871	-3,459
Carrizo	4,666	-4,254
Wilcox	5,916	-5,504
Austin Chalk	10,936	-10,524
Eagle Ford	11,195	-10,783
Frio	—

10 TOPS · FIRST 8

Medina-Jonas Unit C42-255-35499

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

Yegua	1,520	-1,108
Queen City	3,535	-3,123
Reklaw	3,871	-3,459
Carrizo	4,666	-4,254
Wilcox	5,916	-5,504
Austin Chalk	10,941	-10,529
Eagle Ford	11,189	-10,777
Frio	—

10 TOPS · FIRST 8

Medina-Jonas Unit C42-255-35500

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

Yegua	1,520	-1,108
Queen City	3,535	-3,123
Reklaw	3,871	-3,459
Carrizo	4,666	-4,254
Wilcox	5,916	-5,504
Austin Chalk	10,940	-10,528
Eagle Ford	11,188	-10,776
Frio	—

10 TOPS · FIRST 8

Medina-Jonas Unit C42-255-35501

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

Yegua	1,520	-1,110
Queen City	3,535	-3,125
Reklaw	3,871	-3,461
Carrizo	4,666	-4,256
Wilcox	5,916	-5,506
Austin Chalk	10,947	-10,537
Eagle Ford	11,190	-10,780
Edwards	—

10 TOPS · FIRST 8

Medina-Jonas C-B SA42-255-35504

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

Yegua	1,520	-1,110
Queen City	3,535	-3,125
Reklaw	3,871	-3,461
Carrizo	4,666	-4,256
Wilcox	5,916	-5,506
Austin Chalk	10,971	-10,561
Eagle Ford	11,204	-10,794
Frio	—

10 TOPS · FIRST 8

Rodriguez-Trial Unit42-255-37298

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

Yegua	1,636	-1,235
Queen City	3,650	-3,249
Reklaw	3,984	-3,583
Carrizo	4,777	-4,376
Wilcox	6,024	-5,623
Austin Chalk	11,109	-10,708
Eagle Ford	11,321	-10,920
Edwards	—

10 TOPS · FIRST 8

Rodriguez-Trial Unit42-255-37299

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

Yegua	1,648	-1,248
Queen City	3,661	-3,261
Reklaw	3,995	-3,595
Carrizo	4,788	-4,388
Wilcox	5,995	-5,595
Austin Chalk	11,119	-10,719
Eagle Ford	11,339	-10,939
Edwards	—

10 TOPS · FIRST 8

Medina-Jonas Unit A42-255-37297

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

Yegua	1,657	-1,258
Queen City	3,673	-3,274
Reklaw	4,008	-3,609
Carrizo	4,803	-4,404
Wilcox	5,653	-5,254
Austin Chalk	11,142	-10,743
Eagle Ford	11,379	-10,980
Sligo	—

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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