Customers have access to over 6 million Well Logs. Find out how to place an order.
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Welcome to the Most Complete, Highest Quality, Most Affordable, Depth Registered Well Log Service available with access to over 6 million North American well logs. MJ Systems has two raster log formats to choose from, our newest TrueLog Format and our original LogSleuth Format, as well as offering LAS Format.

Key Advantages


Gathering and providing well logs since 1971.


Over 6 million Well Logs in inventory.


Highest quality Well Logs with industry's most detailed depth registrations.


Purchase a single well, an area, meridian, full state or province.


LAS, LogSleuth or TrueLog format Well Logs.


Industry's most affordable Well Log solutions. Own the logs.


Infrastructure to provide timely release of new logs.


LogSleuth Well Logs import into industry preferred mapping programs and geological applications. TrueLog and LAS Well Logs are application ready.

Press Release

PetroDE Adds MJ Systems' US Well Log Library to its Dynamic Geospatial Intelligence Platform.
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MJ is proud to have been a sponsor of the AAPG ACE 2017. Learn More