基于起伏地表的混合法叠前深度偏移

对于起伏地表条件下的叠前深度偏移，克希霍夫积分法可以灵活地处理起伏的地表条件，但是对于复杂构造成像的精度较低；而波动方程混合法偏移对复杂构造的成像精度很高，但是不易处理起伏的地表条件。本文实现了起伏地表条件下的波动方程混合法叠前深度偏移，从而达到既能使复杂构造精确成像，又能处理任意起伏地表的目的。从起伏地表开始的叠前深度偏移，将地表的高程校正隐含在了偏移本身的过程中，且比常规的高程校正更精确，因为常规的高程校正仅仅是垂向的静态时移，忽略了水平分量，而偏移过程中的高程校正则是按照波的实际传播路径来校正的。

Rugged surface oriented hybrid pre-stack depth migration.

For the pre stack depth migration from undulate surface, Kirchhoff method can deal with the undulate surface flexibly but fail to image very complex substructures accurately Hybrid wave equation method can image very complex substructures accurately but is difficult to handle the undulate surface. The paper finished the hybrid wave equation pre stack depth migration in a condition of undulate surface so that achieved the goal that we can both image complex substructure accurately and handle freely undulate surface The pre stack depth migration beginning from undulate surface includes the correction of surface elevation implicitly in itself, which is more accurate than the conventional method because the former carries out the elevation correction along the real wave propagation path in medium and the latter only is vertical static time shift,neglecting horizontal component