基于单程波真振幅分步傅里叶叠前深度偏移方法  

A TRUE AMPLITUDE SPLIT-STEP FOURIER PRE-STACK DEPTH MIGRATION BASED ON ONE-WAY WAVE EQUATION

作　　者：解建建[1] 王绪本[1] 

机构地区：[1]成都理工大学地球探测与信息技术教育部重点实验室,四川成都610059

出　　处：《物探化探计算技术》2011年第1期36-39,118-119,共4页Computing Techniques For Geophysical and Geochemical Exploration

摘　　要：这里将单程波真振幅方程与分步傅里叶算子(SSF)相结合,同时还结合了保幅算法和分步傅里叶算法的优点,因此该方法具有计算量小,占内存少,能处理横向变化的速度等优点。并且克服了傅里叶有限差分方法偏移后的振幅都有很大的偏差的不足。与目前广泛应用的常规的分步有限差分叠前深度偏移相比,具有成像精度高,保持地震波动力学特征等优点。在Marmousi模型上成功地进行了真振幅分步傅里叠前深度偏移处理,取得了理想的成像效果。In this paper,we take the combination of the true amplitude one-way wave equation with split-step Fourier operator(SSF) operator,which includes the advantages of the amplitude preservation method and sub-step Fourier method.Therefore it has the advangates of calculation,accounting for less memory,the significant amplitude deviation after the Fourier finite difference migration method.It has the advantage of high precision imaging with dynamic characteristics of seismic waves compared with the widely used split-step finite difference pre-stack depth migration.we successfully carried out the ture amplitude split-step Fourier pre-stack depth migration based on the Marmousi model and achieve a good imaging result.

关 键 词：单程波动方程 真振幅 分步傅里叶算子 叠前深度偏移 

分 类 号：P631.4[天文地球—地质矿产勘探]