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Elastic wave propagation and scattering in prestressed porous rocks

文献类型：期刊论文

作者Fu, Li-Yun2,5; Fu, Bo-Ye1,3,4; Sun, Weijia4; Han, Tongcheng2,5; Liu, Jianlin2,5
刊名SCIENCE CHINA-EARTH SCIENCES
出版日期2020-05-22
页码21
关键词Poro-acoustoelasticity with compliant pores Elastic waves Prestressed porous rocks Numerical modeling Stress-induced scattering attenuation
ISSN号1674-7313
DOI10.1007/s11430-019-9615-3
英文摘要Poro-acoustoelastic theory has made a great progress in both theoretical and experimental aspects, but with no publications on the joint research from theoretical analyses, experimental measurements, and numerical validations. Several key issues challenge the joint research with comparisons of experimental and numerical results, such as digital imaging of heterogeneous poroelastic properties, estimation of acoustoelastic constants, numerical dispersion at high frequencies and strong heterogeneities, elastic nonlinearity due to compliant pores, and contamination by boundary reflections. Conventional poro-acoustoelastic theory, valid for the linear elastic deformation of rock grains and stiff pores, is modified by incorporating a dual-porosity model to account for elastic nonlinearity due to compliant pores subject to high-magnitude loading stresses. A modified finite-element method is employed to simulate the subtle effect of microstructures on wave propagation in prestressed digital cores. We measure the heterogeneity of samples by extracting the autocorrelation length of digital cores for a rough estimation of scattering intensity. We conductexperimental measurements with a fluid-saturated sandstone sample under a constant confining pressure of 65 MPa and increasing pore pressures from 5 to 60 MPa. Numerical simulations for ultrasound propagation in the prestressed fluid-saturated digital core of the sample are followed based on the proposed poro-acoustoelastic model with compliant pores. The results demonstrate a general agreement between experimental and numerical waveforms for different stresses, validating the performance of the presented modeling scheme. The excellent agreement between experimental and numerical coda quality factors demonstrates the applicability for the numerical investigation of the stress-associated scattering attenuation in prestressed porous rocks.
WOS关键词PARTIALLY SATURATED ROCKS ; BIOT SLOW-WAVE ; CODA WAVES ; VELOCITY-STRESS ; INTRINSIC ATTENUATION ; NUMERICAL-SIMULATION ; ELEMENT-METHOD ; SEISMIC-WAVES ; PORE PRESSURE ; FLUID
资助项目National Natural Science Foundation of China[41821002] ; National Major Project of China[2017ZX05008007] ; Strategic Priority Research Program of the Chinese Academy of Sciences[XDA14010303]
WOS研究方向Geology
语种英语
WOS记录号WOS:000535167800001
出版者SCIENCE PRESS
资助机构National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Major Project of China ; National Major Project of China ; Strategic Priority Research Program of the Chinese Academy of Sciences ; Strategic Priority Research Program of the Chinese Academy of Sciences ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Major Project of China ; National Major Project of China ; Strategic Priority Research Program of the Chinese Academy of Sciences ; Strategic Priority Research Program of the Chinese Academy of Sciences ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Major Project of China ; National Major Project of China ; Strategic Priority Research Program of the Chinese Academy of Sciences ; Strategic Priority Research Program of the Chinese Academy of Sciences ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Major Project of China ; National Major Project of China ; Strategic Priority Research Program of the Chinese Academy of Sciences ; Strategic Priority Research Program of the Chinese Academy of Sciences
源URL[http://ir.iggcas.ac.cn/handle/132A11/96694]  
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, Li-Yun
作者单位1.Univ Chinese Acad Sci, Coll Earth & Planetary Sci, Beijing 100049, Peoples R China
2.China Univ Petr East China, Key Lab Deep Oil & Gas, Qingdao 266580, Peoples R China
3.Chinese Acad Sci, Inst Earth Sci, Beijing 100029, Peoples R China
4.Chinese Acad Sci, Inst Geol & Geophys, Key Lab Earth & Planetary Phys, Beijing 100029, Peoples R China
5.Qingdao Natl Lab Marine Sci & Technol, Lab Marine Mineral Resources, Qingdao 266071, Peoples R China
推荐引用方式
GB/T 7714		 Fu, Li-Yun,Fu, Bo-Ye,Sun, Weijia,et al. Elastic wave propagation and scattering in prestressed porous rocks[J]. SCIENCE CHINA-EARTH SCIENCES,2020:21.
APA Fu, Li-Yun,Fu, Bo-Ye,Sun, Weijia,Han, Tongcheng,&Liu, Jianlin.(2020).Elastic wave propagation and scattering in prestressed porous rocks.SCIENCE CHINA-EARTH SCIENCES,21.
MLA Fu, Li-Yun,et al."Elastic wave propagation and scattering in prestressed porous rocks".SCIENCE CHINA-EARTH SCIENCES (2020):21.

入库方式： OAI收割

来源：地质与地球物理研究所

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