Using the wave equation prestack depth migration on SEG-EAGE 2-D salt dome model as an example, the two-order generalized screen propagator increases 30% calculation work relative to the conventional one-order) generalized screen propagator.

• 以SEG-EAGE二维盐丘模型数据的波动方程叠前深度偏移为例，二阶广义屏传播算子相对于常规（一阶）广义屏传播算子增加了30%25的计算量。