粘弹性波动方程波场重建  

Wave equation for wave-field reconstruction in viscoelastic media

作　　者：袁修贵[1] 宋守根[1] 

机构地区：[1]中南大学信息物理工程学院,湖南长沙410083

出　　处：《中南工业大学学报》2003年第5期559-561,共3页Journal of Central South University of Technology(Natural Science)

基　　金：湖南省中青年科技基金资助项目(98JZY2170)

摘　　要：传统的波动方程波场重建基于完全弹性介质,不能获得满意的地震资料分辨率,在此,基于能描述大地吸收传播效应的斯托克斯波动方程,提出了一种新的有效的多尺度粘弹性波动方程波场重建的方法;根据地震波传播核函数的物理特性,研究了一种新的物理小波;利用具有较高分辨率或较低吸收率的测井信息来估计粘弹性系数,用多尺度方法进行波场重建.实践结果表明,这种多尺度粘弹性波动方法波场重建的方法是有效的,采用该方法能提高地震资料的分辨率.Traditional wavefield reconstruction methods based on acoustic wave equation cannot offer satisfying resolution. In this paper, a new effective multiresolution wavefield reconstruction method for viscoelastic media is proposed, which is based on Stokes wave equation, and a new type of wavelet physical wavelet is used in the method. The information of wells that are of high resolution are used to estimate the viscoelastic coefficients. Then the absorption of viscoelastic media are compensated for to some extent. Finally, some real data examples are given that demonstrate the method to be effective in increasing the resolution of images.

关 键 词：粘弹性 波动方程 Wavelet变换 波场重建 多尺度 

分 类 号：P315[天文地球—地震学]