Stress dependence of elastic wave dispersion and attenuation in fluid-saturated porous layered media

作     者：Fubin CHEN Zhaoyun ZONG Xingyao YIN Alexey STOVAS 

作者机构：National Key Laboratory of Deep Oil and GasChina University of Petroleum(East China)Qingdao 266580China Laoshan LaboratoryQingdao 266580China Centre for Exploration GeophysicsCurtin UniversityGPO Box U1987PerthWA 6845Australia Department of Geoscience and PetroleumNorwegian University of Science and Technology(NTNU)Trondheim 7031Norway 

出 版 物：《Science China Earth Sciences》 (中国科学（地球科学英文版）)

年 卷 期：2023年第66卷第11期

页      面：2622-2634页

核心收录：

学科分类：081801[工学-矿产普查与勘探] 081802[工学-地球探测与信息技术] 081803[工学-地质工程] 08[工学] 0818[工学-地质资源与地质工程] 

基　　金：the sponsorship of the National Natural Science Foundation of China(Grant Nos.42174139,41974119,42030103) the Laoshan Laboratory Science and Technology Innovation Program(Grant No.LSKJ202203406) the China Scholarship Council(Grant No.202206450050) the Innovation Fund Project for Graduate Students of China University of Petroleum(East China)(Grant No.23CX04003A) 

主　　题：Fluid-saturated porous layered(FSPL)media In-situ stress Theory of poroacoustoelasticity Wave equation Wave dispersion and attenuation 

摘      要：The fluid-saturated porous layered(FSPL)media widely exist in the Earth s subsurface and their overall mechanical properties,microscopic pore structure and wave propagation characteristics are highly relevant to the in-situ ***,the effect of in-situ stress on wave propagation in FSPL media cannot be well explained with the existing *** fill this gap,we propose the dynamic equations for FSPL media under the effect of in-situ stress based on the theories of poroacoustoelasticity and anisotropic *** loss mechanism is considered to account for the stress-dependent wave dispersion and attenuation induced by global wave-induced fluid *** s elastic anisotropy parameters are used to represent the anisotropy of the skeleton.A plane-wave analysis is implemented on dynamic equations yields the analytic solutions for fast and slow P waves and two S *** results show that the elastic anisotropy parameters significantly determine the stress dependence of wave *** tortuosity and permeability have remarkable effects on fast and slow P-wave velocity curves and the corresponding attenuation peaks but have little effect on S-wave *** difference in velocities of two S waves occurs when the FSPL medium is subjected to horizontal uniaxial stress,and the S wave along the stress direction has a larger velocity,which implies that the additional anisotropy other than that induced by the beddings appears due to horizontal ***,the predicted velocity results have the reasonable agreement with laboratory *** equations and results are relevant to a better understanding of wave propagation in deep strata,which provide some new theoretical insights in the rock physics,hydrocarbon exploration and stress detection in deep-strata shale reservoirs.