WELL · 42-255-37316 · DISTRICT 2

Davenport-Brown Dupnik B SA #1H

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

Davenport-Brown Dupnik B SA #1H (API 42-255-37316) is a horizontal well in Karnes County operated by Marathon Oil EF LLC, completed May 7, 2022 and listed as producing on the RRC schedule.

The RRC has issued one drilling permit, issued September 21, 2021, permitted to 22,000 ft.

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

Its lease has reported 226K barrels of oil and 452K mcf of gas since December 2021, 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 LLCSep 21, 2021

22,000: total depth, ft
1: permits on file
Sep 21, 2021: last permit issued
May 7, 2022: completed
226K: cumulative oil, bbl
452K: cumulative gas, mcf

PRODUCTION FROM PDQ LEASE REPORTS · Dec 2021 THROUGH Jul 2026

Regulatory status · RRC wellbore file

Schedule: ON SCHEDULE
Completed: May 7, 2022
Shut in: —
Plugged: —

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

Surface location

28.850496, -97.992389

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
Davenport-Brown Dupnik B SA O-2-12273	Eagleville (Eagle Ford-2)	Marathon Oil EF LLC	1	226K	452K	Dec 2021 – Jul 2026

Oil, barrels lease total

Last 12 months 13,436 · prior 12 16,570(-19%)

Gas, mcf lease total

Last 12 months 25,432 · prior 12 39,434(-36%)

Chain of custody

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

1Marathon Oil EF LLCFeb 2022 → Apr 2026

Permits

Permit	Type	Operator	Received	Issued	Spud	Depth
872793-99	Drill	Marathon Oil EF LLC	Sep 15, 2021	Sep 21, 2021	Feb 7, 2020	22,000

Completions

Completed	Lease	Field	Operator	Status	Depth
—	— O-2-12273	—	—	—	—

Formation tops

As filed on W-2/G-1. Subsea from 439 ft elevation.Download CSV →

Formation	MD ft	Subsea
YeguaYEGUA - DISPOSAL	1,745	-1,306
Queen City	3,861	-3,422
Reklaw	4,447	-4,008
Carrizo	4,800	-4,361
WilcoxWILCOX - DISPOSAL	6,404	-5,965
Austin ChalkAUSTIN CHALK - H2S	11,422	-10,983
Eagle FordEAGLE FORD - H2S	11,641	-11,202
EdwardsEDWARDS - H2S	—	—
FrioFRIO - DISPOSAL	—	—
SligoSLIGO - H2S	—	—

Perforations

Perforated and open-hole intervals.

From	To	Type
11,877	18,430	Perforated

Casing

Strings as reported, shallowest first.

Casing in	Set at	Hole in	Cement
9.625	5,717	12.25	1,660 S
6	18,424	8.75	2,887 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
Jul 28, 2022	Jul 11, 2022	Yes
May 4, 2022	Mar 10, 2022	—
Feb 10, 2022	Jan 24, 2022	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 42-255-37316 → W-2, G-1, plugging reports, as PDFs
Completion packets for 42-255-37316 → 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 →

Brown-Dupnik B Unit42-255-37318

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

Yegua	1,758	-1,319
Queen City	3,874	-3,435
Reklaw	4,460	-4,021
Carrizo	4,813	-4,374
Wilcox	6,417	-5,978
Austin Chalk	11,433	-10,994
Eagle Ford	11,644	-11,205
Frio	—

10 TOPS · FIRST 8

Brown-Dupnik B Unit42-255-37317

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

Yegua	1,795	-1,356
Queen City	3,896	-3,457
Reklaw	4,480	-4,041
Carrizo	4,833	-4,394
Wilcox	6,436	-5,997
Austin Chalk	11,447	-11,008
Eagle Ford	11,657	-11,218
Sligo	—

10 TOPS · FIRST 8

Vajdos-Foegelle Unit42-255-37676

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

Queen City	3,620	-3,166
Reklaw	4,213	-3,759
Carrizo	4,716	-4,262
Wilcox	4,799	-4,345
Austin Chalk	11,470	-11,016
Eagle Ford	11,669	-11,215
Frio	—
Yegua	—

10 TOPS · FIRST 8

Vajdos-Foegelle Unit42-255-37677

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

Queen City	3,620	-3,166
Reklaw	4,213	-3,759
Carrizo	4,716	-4,262
Wilcox	4,799	-4,345
Austin Chalk	11,449	-10,995
Eagle Ford	11,648	-11,194
Edwards	—
Sligo	—

10 TOPS · FIRST 8

Hedtke-Martinez-Henke SA42-255-37678

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

Queen City	3,620	-3,166
Reklaw	4,213	-3,759
Carrizo	4,716	-4,262
Wilcox	4,799	-4,345
Austin Chalk	11,439	-10,985
Eagle Ford	11,634	-11,180
Yegua	—
Sligo	—

10 TOPS · FIRST 8

Hedtke-Henke Unit42-255-37675

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

Queen City	3,620	-3,166
Reklaw	4,213	-3,759
Carrizo	4,716	-4,262
Wilcox	4,799	-4,345
Austin Chalk	11,426	-10,972
Eagle Ford	11,623	-11,169
Frio	—
Sligo	—

10 TOPS · FIRST 8

Hedtke-Henke Unit42-255-37674

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

Queen City	3,620	-3,166
Reklaw	4,213	-3,759
Carrizo	4,716	-4,262
Wilcox	4,799	-4,345
Austin Chalk	11,408	-10,954
Eagle Ford	11,603	-11,149
Frio	—
Edwards	—

10 TOPS · FIRST 8

Vajdos F-Forister 541 a SA42-255-37681

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

Queen City	3,613	-3,207
Reklaw	4,189	-3,783
Carrizo	4,680	-4,274
Wilcox	4,783	-4,377
Austin Chalk	11,455	-11,049
Eagle Ford	11,646	-11,240
Frio	—
Edwards	—

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/25537316, documented in the API reference.