【摘要】 地震勘探中平面波分解技术在地震资料处理与反演领域均得以广泛应用,通过正演算法模拟平面波记录有助于理解和检验平面波分解的效果和精度.本文给出一种用以模拟复杂介质中平面波的数值算法,考虑了振幅随入射角度的变化.与前人研究的平面波模拟算法相比,该算法基于波动方程的单程波解法,不但适用于横向非均匀介质,在地层倾角水平条件下还能够准确模拟振幅随入射角关系.通过Marmousi模型的计算实例,证明了本文方法的可行性.更多还原

【Abstract】 Plane wave decomposition technology is widely used in seismic data processing and inversion.Simulating plane wave records with forward algorithm can help understand and test the effect and accuracy of plane wave decomposition.In this article,we present a new method for simulating plane wave in complex media,taking into consideration the variation in amplitude versus angle of incidence.Compared with previous algorithms of plane wave simulation,the algorithm developed in this study based on one-way wave equation method is not only applicable to horizontally inhomogeneous media,but also useful in accurately simulate the amplitude versus angle relationship.The calculation example with Marmousi model conformed feasibility of this method.更多还原