About Us


Founded in 1971, MJ Systems (now MJ Logs) revolutionized the oil & gas industry with the introduction of well logs on microfiche. As one of the pioneers in this field we’ve been gathering logs from many sources and building our unrivaled library since then.

In the 1990’s, MJ Systems introduced Raster Image Well Logs to the industry and has continued to deliver affordable, effective services to thousands of users – ranging from individual geologists to some of North America’s top exploration companies.

Today, MJ Logs offers the most complete coverage with over 6.5 million well logs in the US and Canada. Our US library of well logs includes over 1.9 million wells and 3.6 million logs which have the following features:

Finest original source logs with the most accurate depth registrations

Custom LAS curve selection

Highest quality LAS digitization

Superb and experienced customer service

Flexible & affordable pricing options

Licensing that allows you to keep log and LAS curve data forever

MJ Logs offers the best value for LAS files and Raster Image Well Logs

Please don’t hesitate to Contact Us for more information. We look forward to assisting you with your Well Log needs!