Poro-acoustoelasticity with compliant pores for fluid-saturated rocks

doi:10.1190/GEO2017-0423.1

CORC > 地质与地球物理研究所 > 中国科学院地质与地球物理研究所 > 中国科学院地球与行星物理重点实验室

	Poro-acoustoelasticity with compliant pores for fluid-saturated rocks
	Fu, Bo-Ye 1,2,3; Fu, Li-Yun 1,2,4
刊名	GEOPHYSICS
	2018-05-01
卷号	83 期号:3 页码:WC1-WC14
ISSN号	0016-8033
DOI	10.1190/GEO2017-0423.1
英文摘要	Stress-induced influences on elastic wave velocities include elastic and inelastic behaviors. In general, deformation of rocks is primarily linear elastic for small-magnitude stresses; such behavior can be predicted by the conventional poro-acoustoelasticity theory. On the contrary, large-magnitude stresses induce linear elastic deformation in stiff pores and rock grains and nonlinear elastic deformation in compliant pores. Conventional poro-acoustoelasticity combines the kinetic and strain energy functions via the Lagrange equation. This theory reveals the strain energy transformation of the stiff pores and rock grains for velocity variation. The dual-porosity model uses a semiempirical equation to express the influence of the nonlinear elastic deformation of compliant pores on velocity variations; however, this model does not include the strain energy transformation of compliant pores. We incorporate the dual-porosity model into the conventional poro-acoustoelasticity theory to account for linear and nonlinear elastic deformations through the strain energy transformation of rock grains, stiff pores, and compliant pores. We determine that the work of the loading stress is transformed into two parts: the strain energy for the linear elastic deformation of rock grains and stiff pores and the nonlinear elastic deformation of compliant pores. On applying this theory to ultrasonic measurements under different differential pressures for a saturated sandstone sample, we see that the resulting solution of stress-associated velocity variations is more precise than that obtained using the conventional poroacoustoelasticity theory, especially in the low-effective-pressure regime.
资助项目	Chinese Academy of Sciences Strategic Leading Science and Technology[XDB10010403] ; Major State Research Development Program of China[2016YFC0601101]
WOS关键词	ELASTIC-WAVES ; ULTRASONIC MEASUREMENTS ; STRESS-CONCENTRATION ; FREQUENCY RANGE ; FRACTURED ROCK ; ALIGNED CRACKS ; BIOTS THEORY ; PRESSURE ; PROPAGATION ; MEDIA
WOS研究方向	Geochemistry & Geophysics
语种	英语
出版者	SOC EXPLORATION GEOPHYSICISTS
WOS记录号	WOS:000443596300047
资助机构	Chinese Academy of Sciences Strategic Leading Science and Technology ; Chinese Academy of Sciences Strategic Leading Science and Technology ; Major State Research Development Program of China ; Major State Research Development Program of China ; Chinese Academy of Sciences Strategic Leading Science and Technology ; Chinese Academy of Sciences Strategic Leading Science and Technology ; Major State Research Development Program of China ; Major State Research Development Program of China ; Chinese Academy of Sciences Strategic Leading Science and Technology ; Chinese Academy of Sciences Strategic Leading Science and Technology ; Major State Research Development Program of China ; Major State Research Development Program of China ; Chinese Academy of Sciences Strategic Leading Science and Technology ; Chinese Academy of Sciences Strategic Leading Science and Technology ; Major State Research Development Program of China ; Major State Research Development Program of China
内容类型	期刊论文
源URL	[http://ir.iggcas.ac.cn/handle/132A11/88450]
专题	地质与地球物理研究所_中国科学院地球与行星物理重点实验室
通讯作者	Fu, Bo-Ye
作者单位	1.Chinese Acad Sci, Inst Geol & Geophys, Key Lab Earth & Planetary Phys, Beijing, Peoples R China 2.Chinese Acad Sci, Inst Earth Sci, Beijing, Peoples R China 3.Univ Chinese Acad Sci, Beijing, Peoples R China 4.China Univ Petr East China, Dongying, Shandong, Peoples R China
推荐引用方式 GB/T 7714	Fu, Bo-Ye,Fu, Li-Yun. Poro-acoustoelasticity with compliant pores for fluid-saturated rocks[J]. GEOPHYSICS,2018,83(3):WC1-WC14.
APA	Fu, Bo-Ye,&Fu, Li-Yun.(2018).Poro-acoustoelasticity with compliant pores for fluid-saturated rocks.GEOPHYSICS,83(3),WC1-WC14.
MLA	Fu, Bo-Ye,et al."Poro-acoustoelasticity with compliant pores for fluid-saturated rocks".GEOPHYSICS 83.3(2018):WC1-WC14.