二维反射地震成象──界面与速度的联合反演

2-D SEISMIC REFLECTION TOMOGRAPHY-A JOINT INVERSION OF VELOCITY AND INTERFACE

介绍了利用反射走时联合反演地震界面起伏形态和速度横向分布的方法。正问题采用了一种简单而有效的二维介质中两点射线追踪方法。反问题在广义最小二乘意义下求解。描述界面和速度的两类参数不必要先进行分离。数值模拟的结果表明方法是有效的。处理了通过唐山震区的柏各庄－丰南－丰宁深地震测深剖面，得到了有意义的结果。

This paper describes a joint inversion method of the topography of seismic interfaces and lateral velocity distribution using travel times of reflections. The inverse problem is solved under the general leastsquares criterion. Two types of parameters describing interfaces and velocity needn't be seperated ahead.The numerical modelling shows that this method is effective. We have processed the Baigezhuang-Fengnan-Fengning wide angle reflection and refraction profile data using the method mentioned inthis paper and some significant results have been achieved.