摘要
在水平层状介质模型、平面波源的情况下,通过把模型离散为旅行时相等的小薄层,可以把薄层间的波场递推关系式写成 z 变换的形式。当介质不含吸收时,可将以 z 变换形式表达的波场递推关系式改写为褶积关系式,从而可以在时间域采用褶积形式计算合成记录。与在频率域计算相比,本文的方法更加简便,运算速度快,所用计算机内存更少。该算法亦适用于计算地面一维合成记录。
On condition that horizontal layered medium model and plane wave source are adopted,the recursive relation of wave field in laminated layers can be written in the form of z transform by dividing the model medium into some laminated layers in which wave travel times are equal.Without absorption in the medium,the wave field recursive relation written in the form of z transform may be changed into convolu- tion relation,so that synthetic VSP can be produced using convolution form in time domain.This method is easier and faster and uses less computer's internal storage than the methods in frequency domain.This method is also applicable to the genera- tion of one-dimensional synthetic seismic data on the surface.
出处
《石油地球物理勘探》
EI
CSCD
北大核心
1993年第2期212-218,共7页
Oil Geophysical Prospecting
关键词
合成记录
垂直地震剖面
褶积
synthetic seismogram
vertical seismic profiling(VSP)
time domain
convolution
calculation method
z-transform
