Abstract
Rock physical interpretation of seismic data has been aggressively used for characterizing and monitoring oil and gas reservoirs. In geotechnical applications, rock physical interpretation of geophysical data has also become more important to obtain mechanical and hydrogeological subsurface models. In geotechnical applications, not only sedimentary rocks but also volcanic and crystalline rocks must be characterized and modeled for further analysis. However there are not so many rock physics models for those types of rocks. We have, therefore, collected geophysical properties of various types of rocks obtained in laboratory tests and well loggings. Then as a preliminary study we tried to apply the existing rock physics models to soft sedimentary and crystalline rocks which are very commonly characterized in geotechnical applications in Japan. These preliminary applications revealed that the existing rock physics models can be applied to those types of rocks and S‐wave characteristics in addition to P‐wave ones can be effectively used for obtaining more accurate rock physics models.
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