Processes and systems for correlating well logging data

A process for well log depth matching, comprising:

• normalizing a first well log from a first logging pass obtained within a well bore and a second well log from a second logging pass obtained within the well bore;
• performing a pre-shift by calculating a series of correlation coefficients between the first well log and the second well log and utilizing an offset distance corresponding to a highest correlation coefficient as a constant shift value for the second well log;
• performing feature picking to identify one or more features along the second well log;
• performing normalized cross-correlation based optimization between the first well log and the second well log to match the one or more features along the second well log to the same one or more features of the first well log;
• generating a shift table for depth shifting the one or more features of the second well log to match the depths of the corresponding one or more features in the first well log;
• applying the generated shift table to the second well log to depth match the second well log to the first well log;
• and
• transiting a tool string to a location within the well bore based, at least in part, on geological related data in the depth matched first and second well logs.