Analysis on velocity and attenuation feature of wavefield in biphase anisotropic medium
Li Hong-xing1,2,3, Tao Chun-hui2,3, Zhou Jian-ping2,3, Liu Cai4, Deng Xian-ming2,3, Deng Ju-zhi1, Fang Gen-xian1
1. College of Nuclear Engineering Technology,Donghua University of Technology,Wuzhou City,China;
2. Key Lab of Sea-Bottom Science,State Oceanic Administration PRC,Hangzhou City,Zhejiang Province,310012,China;
3. Second Institute of Oceanography (SIO),State Oceanic Administration PRC,Hangzhou City,Zhejiang Province,310012,China;
4. College of Geoexploration Science and Technology,Jilin University,Changchun City,Jilin Province,130026,China
Abstract：Based on BISQ model,the paper deduced the wave number equation of pseudo-fast P-wave (qP1),pseudo-slow P-wave (qP2),pseudo-SV-wave (qSV) and pseudo-SH-wave respectively in biphase anisotropic medium in 2-D plane. It is discovered by phase velocity and inverse quality factor of 4 kinds of wave computed by numeric simulation of computer and changing rule of seismic wave velocity and attenuation along with propagation direction in polar coordinate that there is different performance of anisotropic feature in 4 kinds of wave and the anisotropic feature of attenuation showing stronger than that of phase velocity. The paper analyzed the influence of different parameters such as porosity,viscosity coefficient,permeability and jet stream length on phase velocity and attenuation of 4 kinds of wave in vertical direction and full-propagating azimuth region,which discovered that the influence also has anisotropic feature. Meanwhile,the paper also analyzed the characters that the wavefield changes with frequency in different parameter conditions and gained a series of meaningful conclusions.
李红星, 陶春辉, 周建平, 刘财, 邓显明, 邓居智, 方根显. 双相各向异性介质中波场速度与衰减特征分析[J]. 石油地球物理勘探, 2009, 44(4): 457-465.
Li Hong-xing, Tao Chun-hui, Zhou Jian-ping, Liu Cai, Deng Xian-ming, Deng Ju-zhi, Fang Gen-xian. Analysis on velocity and attenuation feature of wavefield in biphase anisotropic medium. OGP, 2009, 44(4): 457-465.
