界面和速度反射联合成像──理论与方法

JOINT REFLECTION IMAGING OF VELOCITY AND INTERFACE──THEORY AND METHOD

依据波逆行原理重新推导了由地震波反射走时资料反演界面深度的关系式──走时对界面偏导数关系，它不仅适用于反射波，也适用于透射波．还给出了任意多个复杂界面情况下走时对界面偏导数关系的离散形式．另外，正交算子投影法被推广用来解决速度与界面的同时成像问题．数值模拟的结果表明，本文的方法是有效的．

In this paper the important derivatives of reflection travel time with respect to depth of interface are re-deduced according to the theory of wave inverse propagation.It's valid not only to reflection wave but also to refraction wave;We also give their discrete forms for model with multiple complex interfaces.On the other hand,the method of orthogonal Project operator is adapted to solve the joint imaging problem of velocity and depth of interfaces.The results of numerical simulation show that the proposed method is effective.