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随着地震勘探要求和技术的不断提高,散射波地震勘探方法逐渐引起人们的重视,尤其在具有广角性质的工程地震勘探中,基于非均匀介质理论的散射波理论具有广泛的应用前景。本文在讨论了现阶段几种散射波数值模拟方法的各种利弊后,设计了一种基于微扰论的FK域积分法,该方法求取总场后再通过FK域积分法求取散射场,在散射场的二次震源和空间能量衰减处理两方面做了改进,散射场的计算精度和效率均得到了提高。
With the demand for seismic exploration and the continuous improvement of technology, the seismic exploration methods of scattered waves have drawn more and more attention. Especially in the engineering seismic exploration with wide-angle nature, the theory of scattered waves based on inhomogeneous media theory has a wide range of applications. After discussing the advantages and disadvantages of several numerical simulation methods of scattered waves at present, this paper designs a FK domain integration method based on perturbation theory, which takes the total field and then obtains the scattered field by the FK domain integral method , Improved the secondary sources of the scattering field and the energy attenuation of the space, and the calculation precision and efficiency of the scattering field have been improved.