二维层状介质中衍射波的计算

本文讨论了衍射波的计算,它是文献5]的继续和发展,是为了应用射线法解决二维地震人机联作工作的一部分。根据波的物理性质,引入了等效炮点、等效检波点和等效界面等概念,将Berryhill导出的衍射波计算公式推广到倾斜界面和楔形结构等情形。这一工作与文献1-3]中的工作相结合,在实用上解决了二维地震人机联作解释中的正演计算方法问题。

CALCULATION OF DIFFRACTIONS IN TWO-DIMENSIONAL LAYERED MEDIA

In this paper, calculation of diffractions i discussed. It is a part of our efforts made for solving the problems involved in two-dimensional seismic man-machine interactive interpretations by Ray-method. It is a continuation and development of paper 5]. According to the physical natures of waves, the concepts of equivalent shot-point, equivalent geophone-position and equivalent interface between meda are introduced. The applicable extent of Berryhill's formulae for the calculation of diffractions5] is extended to the construction of oblique interfaces and wedgeouts. Thus the calculation of diffractions in two-dimensional layered media is solved. This work incorporated with the work finished in papers 1-3] makes it possible to solve the forward problem of two-dimensional seismic man-machine interactive interpretations in practice.