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Finite difference modeling of ultrasonic propagation (coda waves) in digital porous cores with un-split convolutional PML and rotated staggered grid

文献类型：期刊论文

作者Zhang, Yan1; Fu, Li-Yun1; Zhang, Luxin2; Wei, Wei1; Guan, Xizhu1
刊名JOURNAL OF APPLIED GEOPHYSICS
出版日期2014-05-01
卷号104页码:75-89
关键词Digital porous core Rotated staggered-grid Numerical modeling Unsplit convolutional perfectly matched layer Ultrasonic coda attenuation
ISSN号0926-9851
DOI10.1016/j.jappgeo.2014.02.012
文献子类Article
英文摘要Ultrasonic wave propagation in heterogeneous porous cores under laboratory studies is an extremely complex process involved with strong scattering by microscale heterogeneous structures. The resulting coda waves, as an index to measure scattering attenuation, are recorded as continuous waveforms in the tail portion of wavetrains. Because of the contamination of reflections from the side ends and reverberations between the sample surfaces, it is difficult to extract pure coda waves from ultrasonic measurements for the estimation of the P- and S-coda attenuation quality factors. Comparisons of numerical and experimental ultrasonic wave propagation in heterogeneous porous cores can give important insight into understanding the effect of boundary reflections on the P-and S-codas in the laboratory experiment. It challenges numerical modeling techniques by three major issues: the creation of a digital core model to map heterogeneous rock properties in detail, the perfect simulation with a controllable and accurate absorbing boundary, and overcoming the numerical dispersions resulting from high-frequency propagation and strong heterogeneity in material. A rotated staggered-grid finite-difference method of Blot's poroelastic equations is presented with an unsplit convolutional perfectly matched layer (CPML) absorbing boundary to simulate poroelastic wave propagation in isotropic and fluid-saturated porous media. The contamination of boundary reflections on coda waves is controlled by the CPML absorbing coefficients for the comparison between numerical and experimental ultrasonic waveforms. Numerical examples with a digital porous core demonstrate that the boundary reflections contaminate coda waves seriously, causing much larger coda quality factors and thus underestimating scattering attenuation. (C) 2014 Elsevier B.V. All rights reserved.
WOS关键词PERFECTLY MATCHED LAYER ; PARTIALLY SATURATED ROCKS ; POROELASTIC NUMERICAL EXPERIMENTS ; BIOT SLOW-WAVE ; VELOCITY-STRESS ; GRAZING-INCIDENCE ; ELASTIC-WAVES ; SEISMIC-WAVES ; NIVELSTEINER SANDSTONE ; HETEROGENEOUS MEDIA
WOS研究方向Geology ; Mining & Mineral Processing
语种英语
WOS记录号WOS:000335618600009
出版者ELSEVIER SCIENCE BV
资助机构National Natural Science Foundation of China(40925013) ; National Natural Science Foundation of China(40925013) ; National Natural Science Foundation of China(40925013) ; National Natural Science Foundation of China(40925013) ; Strategic Leading Science and Technology Programme (Class B) of the Chinese Academy of Sciences(XDB10010400) ; Strategic Leading Science and Technology Programme (Class B) of the Chinese Academy of Sciences(XDB10010400) ; Strategic Leading Science and Technology Programme (Class B) of the Chinese Academy of Sciences(XDB10010400) ; Strategic Leading Science and Technology Programme (Class B) of the Chinese Academy of Sciences(XDB10010400) ; National Natural Science Foundation of China(40925013) ; National Natural Science Foundation of China(40925013) ; National Natural Science Foundation of China(40925013) ; National Natural Science Foundation of China(40925013) ; Strategic Leading Science and Technology Programme (Class B) of the Chinese Academy of Sciences(XDB10010400) ; Strategic Leading Science and Technology Programme (Class B) of the Chinese Academy of Sciences(XDB10010400) ; Strategic Leading Science and Technology Programme (Class B) of the Chinese Academy of Sciences(XDB10010400) ; Strategic Leading Science and Technology Programme (Class B) of the Chinese Academy of Sciences(XDB10010400) ; National Natural Science Foundation of China(40925013) ; National Natural Science Foundation of China(40925013) ; National Natural Science Foundation of China(40925013) ; National Natural Science Foundation of China(40925013) ; Strategic Leading Science and Technology Programme (Class B) of the Chinese Academy of Sciences(XDB10010400) ; Strategic Leading Science and Technology Programme (Class B) of the Chinese Academy of Sciences(XDB10010400) ; Strategic Leading Science and Technology Programme (Class B) of the Chinese Academy of Sciences(XDB10010400) ; Strategic Leading Science and Technology Programme (Class B) of the Chinese Academy of Sciences(XDB10010400) ; National Natural Science Foundation of China(40925013) ; National Natural Science Foundation of China(40925013) ; National Natural Science Foundation of China(40925013) ; National Natural Science Foundation of China(40925013) ; Strategic Leading Science and Technology Programme (Class B) of the Chinese Academy of Sciences(XDB10010400) ; Strategic Leading Science and Technology Programme (Class B) of the Chinese Academy of Sciences(XDB10010400) ; Strategic Leading Science and Technology Programme (Class B) of the Chinese Academy of Sciences(XDB10010400) ; Strategic Leading Science and Technology Programme (Class B) of the Chinese Academy of Sciences(XDB10010400)
源URL[http://ir.iggcas.ac.cn/handle/132A11/85569]  
专题中国科学院地质与地球物理研究所
通讯作者Fu, Li-Yun
作者单位1.Chinese Acad Sci, Inst Geol & Geophys, Key Lab Earths Deep Interior, Beijing 100029, Peoples R China
2.Chinese Acad Sci, Inst Geol & Geophys, Beijing 100029, Peoples R China
推荐引用方式
GB/T 7714		 Zhang, Yan,Fu, Li-Yun,Zhang, Luxin,et al. Finite difference modeling of ultrasonic propagation (coda waves) in digital porous cores with un-split convolutional PML and rotated staggered grid[J]. JOURNAL OF APPLIED GEOPHYSICS,2014,104:75-89.
APA Zhang, Yan,Fu, Li-Yun,Zhang, Luxin,Wei, Wei,&Guan, Xizhu.(2014).Finite difference modeling of ultrasonic propagation (coda waves) in digital porous cores with un-split convolutional PML and rotated staggered grid.JOURNAL OF APPLIED GEOPHYSICS,104,75-89.
MLA Zhang, Yan,et al."Finite difference modeling of ultrasonic propagation (coda waves) in digital porous cores with un-split convolutional PML and rotated staggered grid".JOURNAL OF APPLIED GEOPHYSICS 104(2014):75-89.

入库方式： OAI收割

来源：地质与地球物理研究所

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