地震波场叠前零偏移距化算法研究

Research on seismic wave field pre-stack migration to zero offset(MZO) algorithm

在能源地震勘探中,为了更好地实现叠前倾斜地层的时差校正,提高速度分析和叠加的精度,提出了一种快速实现叠前部分偏移的算法,即零偏移距化(MZO)算法。该算法应用波场外推的技术及波动方程偏移的有限差分算法,可在共偏移道集上实现,对于3D资料须应用同方位角共偏移距道集。经实际资料测试,其计算速度比同类的DMO方法快一倍,且处理效果相当。

In energy resource seismic prospecting,to best realize time difference correction of pre-stack tilted stratum,advance velocity analysis and overlay precision,present a sort of celerity realize pre-stack partial migration algorithm,called migration to zero offset(MZO) algorithm.The algorithm uses the technology of wave field extrapolation and the wave equation migration by finite difference approach,which can be used in common offset gathers,for 3D material requires common offset gathers with the same azimut...