逆时偏移成像条件研究

The Research on Imaging Condition of Reverse Time Migration

本世纪初高性能计算技术进步促进了逆时偏移技术的应用与发展.为解决逆时偏移存在的低频噪音等问题,可利用优化的角度域成像条件对成像进行改进;为实现真振幅逆时偏移,选择合适的成像条件也至关重要.根据不同的成像目的,有必要对逆时偏移使用的成像条件进行深入的分析.本文给出了逆时偏移的五类成像条件,并主要从噪音与振幅等方面对各种方法分别进行了分析说明,为逆时偏移的进一步应用提供方法对比.

At the beginning of this century, the increasing demands for high performance computing （HPC） and the rapid development of computing technique,lead to advances and applications of reverse time migration. However, in order to resolve the existing problems of reverse time migration such as low frequency noise, domain optimization to improve imaging conditions imaging method will be applieable~ Further more, it is also significant to choose appropriate imaging condition to realize the true amplitude in reverse migration. According to different imaging purpose, using the reverse time migration to analyse the conditions is equally notable. This study gives five kinds of imaging conditions of reverse time migration, further interpretation in noise and amplitude areas of various methods has been discussed, ultimately, the analysis shows that the reverse time migration provide comparison and recommendations for the future application.