Acoustic Characteristics of Gravel Sediment: Application of the BICSQS model

Abstract

Acoustic properties such as phase velocity or attenuation of ocean sediment have been studiedby many researchers because it affects acoustic propagation in the under of ocean. Theoretically,Biot’s theory is well known for explain the phase velocity and attenuation of porous medium likeocean sediment. After that, BISQ model which considered grain to grain contact physics isdeveloped by Dvorkin and Nur. And BICSQS model which adds grain contact squirt flow andviscous drag to BISQ model is worked out by Chotiros and Isakson. By these models,behavior of the phase velocity and attenuation of ocean sediment can be explained. Until a recentdate, sand sediment is mainly investigated, it is necessary to study about gravel sediment.phase velocity and attenuation of porous medium likeocean sediment. After that, BISQ model which considered grain to grain contact physics isdeveloped by Dvorkin and Nur. And BICSQS model which adds grain contact squirt flow andviscous drag to BISQ model is worked out by Chotiros and Isakson. By these models,behavior of the phase velocity and attenuation of ocean sediment can be explained. Until a recentdate, sand sediment is mainly investigated, it is necessary to study about gravel sediment.