Title | Seismic dispersion, attenuation and frequency-dependent anisotropy in a fluid-saturated porous periodically layered medium |
Author | |
Corresponding Author | Junxin Guo |
Publication Years | 2023-02
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DOI | |
Source Title | |
ISSN | 1365-246X
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EISSN | 1365-246X
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Volume | 234Issue:1Pages:331-345 |
Abstract | The White model is generally used to quantify seismic dispersion and attenuation caused by interlayer wave-induced fluid flow. However, this model derives P-wave dispersion and attenuation only in the direction perpendicular to the layer. Thus, in this study, we derive the exact analytical solutions for full effective stiffness coefficients of a fluid-saturated layered porous medium so as to calculate the angle-dependent seismic dispersion and attenuation and frequency-dependent anisotropy. The analytical solution for fluid pressure is derived using Biot's equations of quasi-static poroelasticity. Then, the mean stress or strain is obtained through its relationship with fluid pressure, and the stress-strain value is used to derive the effective stiffness coefficients. This is followed by the calculation of the angle-dependent seismic dispersion and attenuation and frequency-dependent anisotropy. Our results show that the layered medium with alternating gas- and brine-saturated layers having the same matrix is isotropic at all frequencies. However, the layered medium with periodically distributed highly porous, thin layers shows significant frequency-dependent anisotropy. In the case of P wave, the largest magnitudes of dispersion and attenuation are observed in the direction perpendicular to the layer, while those for SV wave occur at the incident angle of around 45 degrees. When our model is compared with the previous models, the low- and high-frequency limits of our model are found to be identical to the poroelastic Backus averaging. In addition, the widely used single relaxation function approximation is found to be a good approximation of our exact solutions. Our proposed model is easy to use and can be applied in the seismic exploration of the layered earth. |
Keywords | |
URL | [Source Record] |
Indexed By | |
Language | English
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SUSTech Authorship | Corresponding
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Funding Project | National Natural Science Foundation of China[
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WOS Research Area | Geochemistry & Geophysics
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WOS Subject | Geochemistry & Geophysics
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WOS Accession No | WOS:000943263600016
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Publisher | |
Data Source | IEEE
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PDF url | https://ieeexplore.ieee.org/stamp/stamp.jsp?tp=&arnumber=10068382 |
Citation statistics |
Cited Times [WOS]:0
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Document Type | Journal Article |
Identifier | http://kc.sustech.edu.cn/handle/2SGJ60CL/501500 |
Department | Department of Earth and Space Sciences |
Affiliation | 1.School of Earth Science and Spatial Information Engineering, Hunan University of Science and Technology, Xiangtan 411201, China; Sinopec Key Laboratory of Geophysics, Sinopec Nanjing Institute of Geophysical Exploration, Nanjing 211103, China; Chongqing Institute of Unconventional Oil & Gas, Chongqing University of Science and Technology, Chongqing 401331, China 2.School of Earth Science and Spatial Information Engineering, Hunan University of Science and Technology, Xiangtan 411201, China; Sinopec Key Laboratory of Geophysics, Sinopec Nanjing Institute of Geophysical Exploration, Nanjing 211103, China 3.Guangdong Provincial Key Laboratory of Geophysical High-resolution Imaging Technology, Southern University of Science and Technology, Shenzhen 518055, China; Department of Earth and Space Sciences, Southern University of Science and Technology, Shenzhen, 518055, China; guojx@sustech.edu.cn 4.School of Earth Science and Spatial Information Engineering, Hunan University of Science and Technology, Xiangtan 411201, China |
Corresponding Author Affilication | Department of Earth and Space Sciences |
Recommended Citation GB/T 7714 |
Jianping Liao,Ping Wen,Junxin Guo,et al. Seismic dispersion, attenuation and frequency-dependent anisotropy in a fluid-saturated porous periodically layered medium[J]. Geophysical Journal International,2023,234(1):331-345.
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APA |
Jianping Liao,Ping Wen,Junxin Guo,&Lin Zhou.(2023).Seismic dispersion, attenuation and frequency-dependent anisotropy in a fluid-saturated porous periodically layered medium.Geophysical Journal International,234(1),331-345.
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MLA |
Jianping Liao,et al."Seismic dispersion, attenuation and frequency-dependent anisotropy in a fluid-saturated porous periodically layered medium".Geophysical Journal International 234.1(2023):331-345.
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