Reverse Time Migration of Multiples Based on Different-order Multiples Separation

The present multiple migration are performed through modifying boundary conditions, and more information about the subsurface can be obtained in the migration result. However, for the interference from multiples with different orders or primaries, heavy crosstalk artifacts are introduced. In this paper, we propose a multiple migration method by separating different-order multiples based on focal transform firstly, so as to further improve the migration precision, then we choose the reverse time migration method to migrate different orders of multiples. Finally, the final migration result can be gained by stacking the migration result of different-order multiples. By migrating different-order multiples respectively, the crosstalk artifacts are well suppressed in the final images. The numerical examples demonstrate the feasibility and validity of this method.