Experimental research on relationship between gas hydrate saturation and acoustic parameters
天然气水合物饱和度与声学参数响应关系的实验研究

It is necessary to know gas hydrate saturation in evaluating gas hydrate volume.So far,there are only a few models to estimate gas hydrate saturation.These models are often empirical or derived from observed data.Therefore,we need to confirm their validity and applicability in order to use the correct model.For the first time,we combined ultrasonic wave and time domain reflectometry to study the relationship between gas hydrate saturation and acoustic parameters in the process of gas hydrate formation and dissociation,and got fine results. Subsequently,we attempted to fit the calculated data from time-average equation,Wood's equation,Weighted equation of Lee,and Biot-Gassmann theory of Lee(BGTL)with the observed data.It is suggested that the Weighted equation and BGTL are more applicable in our calculation and for various sediments.