Estimation of Porosity for Sedimentary Rocks and Volcanic Rocks from Sonic Log Data in the Futagawa Fault Drilling

Abstract

Lithology (a) and rock species (b) in FDB-1 borehole. Comparison between estimated porosity φ S from log data by several empirical equations including one newly proposed in this study and measured porosity φ C using core samples (c); and continuous depth profile of optimal estimated φ S and φ C (d).