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《Progress in Geophysics》 2014-05
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VSP velocity analysis based on common scattering point gather

CHEN Zhan-guo;LIU Yong-hua;SINOPEC Geophysical Research Institute;College of Geology Engineering and Geomatics,Chang’an University;  
As existing VSP velocity analysis method can not better adapt to the current situation of image needs, we introducing the equivalent offset from surface seismic for VSP,redefined the formula for the VSP equivalent offset,and gives the VSP common scattering point gathers formation principles and procedures and the flow for velocity analysis by which gathers.By analyzing the model data and field data show that this gather has greater folds and higher range of offset,the velocity is not affected by the formation dip,and can be adapted to other vertical survery.Therefore,the common scattering point gather can be used to velocity analysis same as surface seismic.this method has a good application prospects.
【CateGory Index】: P631.4
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