WELL · 42-409-33089 · DISTRICT 4

Mauch-Roots Unit #1

Mauch-Roots Unit #1 (API 42-409-33089) is a permitted well in San Patricio County filed by Welder Exploration & Prod., Inc.; no completion report is on file yet.

The RRC has issued 2 drilling permits between 2018 and 2019, permitted to 6,000 ft.

Completion filings report 3 formation tops, including Miocene (undifferentiated), Catahoula, Vicksburg.

Its lease has reported 257 barrels of oil since June 2018, last reporting in July 2026.

Operator of record

Welder Exploration & Prod., Inc.

San Antonio, TX · P-5 Y, filed Dec 1, 2023 · 346 permits on file · (210) 601-1249

SOURCE · RRC EWA WELLBORE SCHEDULE

What each RRC source says

Wellbore schedule	none
Production reports	Welder Exploration & Prod., Inc.through Mar 2020
Latest permit	Welder Exploration & Prod., Inc.Dec 9, 2019

6,000: total depth, ft
2: permits on file
Dec 9, 2019: last permit issued
—: completed
257: cumulative oil, bbl
0: cumulative gas, mcf

PRODUCTION FROM PDQ LEASE REPORTS · Jun 2018 THROUGH Jul 2026

Regulatory status · RRC wellbore file

Schedule: OFF SCHEDULE
Completed: —
Shut in: —
Plugged: —

Surface location

28.058539, -97.347378

OpenStreetMap → · Google Maps →

Permit surface location from the RRC GIS record, in San Patricio 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
Mauch-Roots Unit O-4-14109	Plymouth (Main Greta Sand)	Welderxp Ltd.	1	257	0	Jun 2018 – Jul 2026

No volumes reported on these leases in the last three years.

Chain of custody

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

1Welder Exploration & Prod., Inc.Dec 2019 → Mar 2020

Permits

Permit	Type	Operator	Received	Issued	Spud	Depth
859551-99	Recompletion	Welder Exploration & Prod., Inc.	Dec 3, 2019	Dec 9, 2019	—	5,690
840358-99	Drill	Welder Exploration & Prod., Inc.	May 22, 2018	May 23, 2018	Jun 5, 2018	6,000

Completions

Completed	Lease	Field	Operator	Status	Depth
—	— O-4-14109	—	—	—	—

Formation tops

As filed on W-2/G-1. Subsea from 40 ft elevation.Download CSV →

Formation	MD ft	Subsea
Miocene (undifferentiated)MIOCENE-LAGARTO-OAKVILLE - INJEC	2,050	-2,010
Miocene (undifferentiated)MIOCENE-LAGARTO-OAKVILLE - INJEC	2,600	-2,560
CatahoulaCATAHOULA-ANAHUAC - INJECTION/DI	4,000	-3,960
CatahoulaCATAHOULA-ANAHUAC - INJECTION/DI	4,300	-4,260
CatahoulaCATAHOULA-FRIO - INJECTION/DISPO	4,350	-4,310
CatahoulaCATAHOULA-FRIO - INJECTION/DISPO	4,700	-4,660
Vicksburg	5,500	-5,460
Vicksburg	—	—

Perforations

Perforated and open-hole intervals.

From	To	Type
4,355	4,361	Perforated
4,820	4,826	Perforated

Casing

Strings as reported, shallowest first.

Casing in	Set at	Hole in	Cement
9.625	550	12.25	270 S
7	5,690	8.75	195 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	Oct 1, 2020	Sep 17, 2020	—
00	Mar 26, 2019	Jan 23, 2019	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 42-409-33089 → W-2, G-1, plugging reports, as PDFs
Completion packets for 42-409-33089 → 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 →

Roots-Havelka42-409-33136

0.2 KM · Jura Energy Operating LLC · Section with this well →

Miocene (undifferentiated)	3,854	-3,815
Catahoula	4,485	-4,446
Catahoula	4,822	-4,783
Vicksburg	—

Mauch-Angeline Unit A42-409-33083

0.5 KM · Welder Exploration & Prod., Inc. · Section with this well →

Miocene (undifferentiated)	2,080	-2,038
Catahoula	4,000	-3,958
Catahoula	4,500	-4,458
Vicksburg	—

Angeline42-409-33080

0.5 KM · Welder Exploration & Prod., Inc. · Section with this well →

Miocene (undifferentiated)	2,100	-2,060
Catahoula	3,950	-3,910
Catahoula	4,550	-4,510
Vicksburg	—

Mauch42-409-33075

0.7 KM · Welder Exploration & Prod., Inc. · Section with this well →

Miocene (undifferentiated)	2,070	-2,032
Catahoula	3,900	-3,862
Catahoula	4,500	-4,462
Vicksburg	—

Mauch-Angeline Unit B42-409-33084

0.9 KM · Welder Exploration & Prod., Inc. · Section with this well →

Miocene (undifferentiated)	2,130	-2,090
Catahoula	3,950	-3,910
Catahoula	4,500	-4,460
Vicksburg	—

Mauch42-409-33074

1.0 KM · Welder Exploration & Prod., Inc. · Section with this well →

Miocene (undifferentiated)	2,000	-1,959
Catahoula	3,930	-3,889
Catahoula	4,700	-4,659
Vicksburg	—

Reynolds42-409-33129

1.1 KM · Welder Exploration & Prod., Inc. · Section with this well →

Miocene (undifferentiated)	2,150	-2,115
Catahoula	4,000	-3,965
Catahoula	4,800	-4,765
Vicksburg	—

Brown-Mauch Unit42-409-33082

1.3 KM · Welder Exploration & Prod., Inc. · Section with this well →

Miocene (undifferentiated)	2,000	-1,960
Catahoula	4,300	-4,260
Vicksburg	—
Catahoula	—

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/40933089, documented in the API reference.