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《Journal of Chengdu University of Technology(Science & Technology Edition)》 2008-03
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Research and application of the attenuation theory for seismic wave based on the wave equation

YIN Chen,HE Zhen-hua,HUANG De-jiState Key Laboratory of Oil and Gas Reservoir Geology and Exploitation,Chengdu University of Technology,Chengdu 610059,China  
There are two sides of the energy attenuation for the seismic along with the propagation in the medium.One is the sphere spread,and the other is the attenuation caused by the liquid in the rock,and it has a close relation with the lithology character and the liquid.The diffusivity and viscosity in the rock saturated with the liquid make the seismic energy attenuate when the seismic wave propagates in the rock.Further more,the energy of high frequency attenuates faster and more,in reverse,the energy of the low frequency attenuates slower and less,so they become the important reason of the low frequency shadow.Based on the wave equation theory,and starting from the diffusivity and the viscosity,the paper mainly simulates the attenuation character of the signal frequency energy when the seismic wave promulgates in strata,then explains the theory of the low frequency shadow caused by the attenuation,and eventually uses it in the actual processing.
【Fund】: 海洋863项目(2006AA0AA102-12);; 国家自然科学基金资助项目(40474044)
【CateGory Index】: P631.4
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