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DOI	10.1029/2019JB018685
	Effects of Coupling Between Wave-Induced Fluid Flow and Elastic Scattering on P-Wave Dispersion and Attenuation in Rocks With Aligned Fractures
	Guo J.; Gurevich B.
发表日期	2020
ISSN	21699313
卷号	125 期号:3
英文摘要	Fracture-background wave-induced fluid flow (FB-WIFF) and elastic scattering are considered two important mechanisms for P-wave dispersion and attenuation in the fractured and porous fluid-saturated rock. While numerous theoretical models have been proposed to study these two mechanisms, their coupling effects are seldom studied. Hence, in this work, we investigate the coupling between these two mechanisms theoretically based on the Biot equations of dynamic poroelasticity. The P wave is assumed to propagate perpendicular to the fracture plane in the fluid-saturated porous rock with aligned penny-shaped fractures. The general solutions are first obtained from the governing equations, then the expressions for the coefficients of the general solutions are derived using the boundary conditions. To illustrate the influencing factors on the coupling between FB-WIFF and elastic scattering, a numerical example is given. The results show that the coupling strength between FB-WIFF and elastic scattering are greatly influenced by the ratio of fluid viscosity to background permeability. With the decrease of this ratio, the coupling strength becomes stronger. Furthermore, the coupling effects are also affected by the fracture radius and thickness. However, the fracture density and fluid bulk modulus have negligible influence on the coupling effects. This new model shows good agreement with other theories. Furthermore, comparison of this new model with the linear superposition of FB-WIFF and elastic scattering indicates the strong nonlinear coupling between these two mechanisms when their characteristic frequencies are close. Finally, the extension of this model and implications of our results for seismic exploration and sonic logging are discussed. ©2020. American Geophysical Union. All Rights Reserved.
语种	英语
来源期刊	Journal of Geophysical Research: Solid Earth
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/187908
作者单位	Department of Earth and Space Sciences, Southern University of Science and Technology, Shenzhen, China; School of Earth and Space Sciences, University of Science and Technology of China, Hefei, China; WA School of Mines: Minerals, Energy and Chemical Engineering, Curtin University, Perth, WA, Australia; CSIRO, Kensington, WA, Australia
推荐引用方式 GB/T 7714	Guo J.,Gurevich B.. Effects of Coupling Between Wave-Induced Fluid Flow and Elastic Scattering on P-Wave Dispersion and Attenuation in Rocks With Aligned Fractures[J],2020,125(3).
APA	Guo J.,&Gurevich B..(2020).Effects of Coupling Between Wave-Induced Fluid Flow and Elastic Scattering on P-Wave Dispersion and Attenuation in Rocks With Aligned Fractures.Journal of Geophysical Research: Solid Earth,125(3).
MLA	Guo J.,et al."Effects of Coupling Between Wave-Induced Fluid Flow and Elastic Scattering on P-Wave Dispersion and Attenuation in Rocks With Aligned Fractures".Journal of Geophysical Research: Solid Earth 125.3(2020).