Experimental and theoretical study of frequency and temperature dependence on seismic attenuation of saturated rocks

doi:10.4028/www.scientific.net/KEM.326-328.1149

CORC > 武汉岩土力学研究所 > 中科院武汉岩土力学所 > 岩土力学所知识全产出 > 会议论文

	Experimental and theoretical study of frequency and temperature dependence on seismic attenuation of saturated rocks
	Liu, Xiaoyan; Zhang, Chengyuan; Xi, Daoying; Liu, Quansheng
	2006
会议日期	2006-09-26
会议地点	Cheju Isl, SOUTH KOREA
关键词	frequency temperature saturated rock attenuation viscosity
DOI	10.4028/www.scientific.net/KEM.326-328.1149
页码	1149-1152
英文摘要	Most rocks are saturated or partly saturated with different fluids under different depth, temperature and pressure conditions. It is generally acknowledged that fluids have the most important effect on the attenuation and dispersion of seismic waves. There exists a relation between frequency- and temperature-dependence on rock's seismic properties. It is not yet clear in literature whether there exist other equally important attenuation mechanisms as that in Biot's model, since there are other Sources of dissipation, also related to fluids. that are not considered in Biot theory but that may also contribute to the overall dissipation of seismic energy. Identifying the precise relaxation mechanisms is still the subject of experimental and theoretical research. In this article, a series of experiments are conducted on dry and saturated rocks (sandstone, marble, granite) at different temperatures and frequencies to find the attenuation mechanism of interaction between rock skeleton and pore-fluid. Fluid viscosity generally depends on temperature, so the effect of pore fluid on attenuation is confirmed in terms of apparent viscosity variation of rock caused by the change of pore-fluid conditions (Such as frequency or temperature). Based on our experimental data, we develop a new model of macroscopic apparent viscosity in saturated rock which is consistent with the nonlinear relaxation law. It helps to derive the analytical expressions to compute velocity dispersion and attenuation as functions of frequency and temperature.
会议录	Experimental Mechanics in Nano and Biotechnology, Pts 1 and 2
会议录出版者	TRANS TECH PUBLICATIONS LTD
会议录出版地	STAFA-ZURICH
语种	英语
WOS研究方向	Biotechnology & Applied Microbiology ; Engineering ; Science & Technology - Other Topics ; Materials Science
WOS记录号	WOS:000243448201059
内容类型	会议论文
源URL	[http://119.78.100.198/handle/2S6PX9GI/4415]
专题	岩土力学所知识全产出_会议论文
作者单位	Chinese Acad Sci, Inst Rock & Soil Mech
推荐引用方式 GB/T 7714	Liu, Xiaoyan,Zhang, Chengyuan,Xi, Daoying,et al. Experimental and theoretical study of frequency and temperature dependence on seismic attenuation of saturated rocks[C]. 见:. Cheju Isl, SOUTH KOREA. 2006-09-26.