【摘要】 根据单程波动方程波场外推原理,文中总结了共炮道集数据混合域波场外推与成像算法流程,该流程主要包括地震数据预处理、波动方程速度分析和波场外推成像3部分;鉴于单程波动方程波场外推算法和数据流具有非常适合粗粒度的任务级并行计算,处理器间的通讯较少,各个计算节点上可能有多个处理任务,且各节点的处理任务不等,负载极不平衡等特点,本文采用了主从模式动态负载平衡并行算法,该算法可以充分利用多个处理节点的空闲资源,提高作业的计算效率;将混合域单程波动方程波场外推算法与主从模式动态负载平衡并行算法相结合,实现了软件级断点恢复功能。应用国产"Stseis叠前深度成像处理软件系统"对胜利探区的实际资料进行了生产性应用处理,取得了较好的叠前成像结果。更多还原

【Abstract】 According to wavefield extrapolation principle of one-way wave equation,the paper summarized the flow of wavefield extrapolation and imaging algorithm of common shot gather in mixed domain,which mainly included three parts: seismic data preprocessing,wave equation velocity analysis and wavefield extrapolation imaging.In view of the characters of wavefield extrapolation algorithm of one-way wave equation and data flow: very suitable for parallel computation of gross-grain task grade,less communication between processor,multiple processing tasks,unequal processing task and extremely unbalanced load at each computing node,the paper adopted master/slaver dynamic load balanced parallel algorithm that can fully use idle resources of multiple processing nodes,improving computing efficiency of job;combining the wavefield extrapolation algorithm of one-way wave equation in mixed domain with master/slaver dynamic load balanced parallel algorithm realized the restoration function of break point of software grade.Using Chinese-built "Stseis prestack depth imaging processing software system" to carry out productive application processing for practical data in Shengli exploration area achieved better prestack imaging results.更多还原