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垂直地震剖面解释工作的一个重要组成部分就是分离上、下行波。本文所介绍的方法是利用奇异值分解(SVD),将时移 VSP 剖面分解成特征象.时移 VSP 剖面的头几个特征象含有水平校直的下行波成分,而最后的几个特征象则含有非相关噪声成分、用特征象的部分和可以恢复分离后的上行波。这种方法的几个重要特点是记录道无须作规则采样;对初至拾取无过高的精度要求;处理过程中噪声自动衰减;可以计算的特征象或特征象和是此法的一部分,它可提供其它方面的重要信息。
An important part of the interpretation of the vertical seismic profile is the separation of the up and down waves. The approach introduced in this paper is to decompose the time-shifted VSP profile into features using singular value decomposition (SVD). The first few features of the time-shifted VSP profiles contain horizontal-strained down-going wave components, while the last few features It contains the non-correlated noise components, using the part of the feature and the recovered upstream wave that can be recovered. Some of the important features of this method are that there is no need for regular sampling of the tracks, no excessive accuracy of the first pick up, automatic attenuation of noise during processing, a feature or feature that can be computed as part of this method, Other important information is provided.