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《Progress in Geophysics》 2014-01
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Migration of the deep reflection seismic data

ZHU Xiao-san;GAO Rui;GUAN Ye;LI Qiu-sheng;WANG Hai-yan;LU Zhan-wu;Institute of Geology,Chinese Academy of Geological Sciences;  
In this paper both the migration theories and some algorithms have been briefly summarized.The paper are focus on studying the prestack migration method of deep reflection seismic data and discussing on the input data processing procedure and migration parameters in detail,that is,input data regularization.migration aperture width,anti-aliasing factor and velocity model.A proper data regularization procedure being used for the input data before prestack migration can enhance the continuities of reflection events and improve the uniformity of energy in the final migrated section.An appropriate migration aperture width should be chosen during prestack migration to make sure the energy of wavefield is properly converged and steep-dipping reflectors are clearly imaged without improving noise in the final section.A proper anti-aliasing factor should be used during prestack migration to make sure the high frequency noise can be depressed and the dominant frequency bandwidth of the entire section is in a reasonable range.An accurate velocity model is a key point for prestack migration.It can improve the accuracy of imaging in the migrated section with an iterative velocity updating procedure during the prestack migration of the deep reflection seismic data,which is very important for generating a clear and accurate image of the lithosphere and the basis of the subsequent interpretation of the migrated section.
【Fund】: 中国地质科学院地质研究所所长基金项目(J1315);; 三维地质填图项目(D1204);; 深部探测(SinoProbe-02)专项联合资助
【CateGory Index】: P631.44
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