【摘要】 介绍了随机介质的基本概念,提出了一种根据随机过程理论建立介质模型的方法,利用二维指数型椭圆自相关函数为二维随机介质模型合理化的构建提供函数支持。正演算法使用交错网格有限差分法模拟弹性波在二维随机介质模型中的传播,激发方式采用自激自收模式。正演结果表明,随机介质模型模拟大港油田薄层砂岩互层地层,交错网格有限差分算法对于该模型的正演数值模拟,在模型算法中具有可行性。更多还原

【Abstract】 This paper presents basic concept of random medium,put forwards a method which establishing a medium model based on random process theory,and provides a 2D exponential elliptic auto-correlation function to build a 2D random medium model.In forward algorithm,a staggered-grid finite-difference method is adopted to simulate elastic-wave propagating in this 2D model.And the wave is excited in zero-offset mode.This model has been applied to thin-interbedded sandstone in Dagang oilfield.Result shows that the finite-difference method is feasible for forward numerical simulation of the model.更多还原