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在复杂介质地震数据的全波反演中,最理想的方法是用有限差分或有限元法进行正演模拟,但是,在三维条件下应用却异常昂贵。即使采用二维介质,全波二维反演法都不能收到很好的效果,因为它不能正确地模拟三维动态范围。许多地震实验中均假设地质条件的变化是二维的。但产生的是三维(点距)波场,我们称之为2.5维。对这种结构进行研究后,可有效
In the full-wave inversion of complex media seismic data, the best method is to use finite difference or finite element method for forward modeling, but the application in three-dimensional conditions is extremely expensive. Even with two-dimensional media, the full-wave two-dimensional inversion method can not receive good results, because it can not correctly simulate the three-dimensional dynamic range. In many seismic experiments, it is assumed that the change in geological conditions is two-dimensional. But what produces is a three-dimensional (pitch) wavefield, which we call 2.5-D. After studying this structure, it can be effective