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→Depth of investigation of various logging methods
==Depth of investigation of various logging methods==
==Depth of investigation of various logging methods==
The following table, based on data from Beyer<ref name=ch15r1>Beyer, L., A., 1991, [[Borehole gravity]] Surveys: SEG Short Course notes, June, 350 p. Excellent source for general principles of borehole gravity. Very good figures and references.</ref> shows conservative estimates of the depth of investigation using various density logging tools. [[Borehole gravity]] can sample the farthest distance and investigate the most formation.
The following table, based on data from Beyer<ref name=ch15r1>Beyer, L. A., 1991, [[Borehole gravity]] Surveys: SEG Short Course notes, June, 350 p.</ref> shows conservative estimates of the depth of investigation using various density logging tools. [[Borehole gravity]] can sample the farthest distance and investigate the most formation.
{| class = "wikitable"
{| class = "wikitable"