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| | Abstract | | In recent years, rock physical interpretation of seismic data has been aggressively used in oil and gas industry for characterizing and monitoring oil and gas reservoirs. In this field, only sedimentary rocks such as sandstone have been modeled using mainly seismic data. In civil engineering and environmental applications, rock physical interpretation of geophysical data has become more important to obtain mechanical and hydrogeological subsurface models. In geotechnical applications, not only sedimentary rocks but also crystalline rocks such as granite must be characterized and modeled for further analysis. We have therefore started studying rock physics models of wide variety of rocks using many geophysical data for geotechnical applications. We firstly collected the data of physical properties of rocks obtained in laboratory tests and well loggings and then used these data for preliminary study of applicability of the existing rock physics models. In this paper, the physical properties of rocks collected so far are presented with some examples of their cross-plots. Existing rock physics models are applied to young soft mudstones and crystalline granite which are very common rocks in geotechnical applications in Japan to evaluate their applicability. These preliminary applications reveal that the specific rocks presented here can be modeled by the existing models appropriately selected and S-wave characteristics in addition to P-wave ones can be effectively used to model rocks more accurately. |
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