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《Geophysical Prospecting for Petroleum》 2011-01
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Gaussian beam migration and its application.

Guo Chaobin,Li Zhen-chun, Yue Yubo College of Geo-resource and Information,China University of Petroleum(East China),Qingdao 266555,China  
Gaussian beam migration(GBM) is a ray based imaging method. Based on the basic rules of GBM,we presented applications of GBM to amplitude-preserved migration,angle domain imaging and imaging from topographic surface,discussed the selection criteria of some important parameters of GBM such as initial width,bandwidth, and sampling spacing of beams,and validated the effectiveness of GBM with numerical experiments on both synthetic and real data.According to the mentioned study,we get the following conclusions:①the amplitude-preserved GBM can recover the true reflectivity of subsurface within specified offset;②compared to Kirchhoff migration,amplitude-preserved GBM has a better imaging quality of complex structures and its computing time is only 1.6 times to that of preserved amplitude Kirchhoff migration;③GBM has a better imaging quality of steep dips than the traditional wave equation migration;④GBM has good adaptability to topographic surface.
【Fund】: 国家高技术研究发展计划(863)项目(2007AA060502);; 国家重点基础研究发展计划(973)项目(2007CB209605)联合资助
【CateGory Index】: P631.4
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