SEG/EAEG盐丘模型的三维分步傅里叶炮集叠前深度偏移

3-D shot-gather prestack depthmigration for SEG/EAEG saltmodel with the split-step Fouriermethod

中国科学院数学与系统科学研究院, 北京100080

State Key Laboratory of Scientific/Engineering Computing, Academy ofmathematics and System Sciences, Chinese Academy of Sciences, Beijing, 100080, China

用分步傅里叶法对SEG/EAEG盐丘模型进行了三维叠前深度偏移。在偏移中,采用相位编码方法,使得每次可以同时进行多炮偏移,节省了计算量。在计算中,采用了MPI并行算法,提高了计算效率。数值计算得到了三维SEG/EAEG盐丘模型的精确成像结果,这表明三维分步傅立叶法叠前深度偏移是一种精度良好且高效的方法,该方法可用于对三维复杂构造的精确高效成像,具有良好的实用性。

In the paper, 3-D prestack depthmigration for the SEG/EAEG saltmodel with the split stepmethod(SSF) is investigated.Inmigration, phase encodingmethod, which canmakemulti shot datamigrate simultaneously, is adopted in order to reduce computation cost.mPI parallel algorithm is also adopted in order to enhance computational efficiency.Themigration results for 3D SEG/EAEG saltmodel show that the 3-D SSFmigration is amigrationmethod that has good precision and effectiveness.It had good practicability and can be used for imaging 3-D complex structures effectively and precisely.