重力,地震资料联合反演实例

本文利用速度、密度参数之间的关系，进行地震，重力资料联合反演，文中给出了两个实例；实例一对给定地层模型取多次重力观测值后形成一线性方程组，然后用奇异值分解等方法解此方程组获得密度参数（方程解）的范围，从中选出最佳解。实例二是以层速度和密度关系为桥梁，进行地震波产时与重力预测值联合反演，可以得到与地震解释似的结果。

Examples of joint inversion of gravimetric and seismic data

Joint inversion of seismic and gravimetric data can be made by using the rela-tion between velocity and density. 2 examples are given here. ln the first example,the observed gravimetric data are repeatedly taken from a given stratigraphic model to form a system of linear equations;then we solved the system of linear equations by singular-value decomposition and so on to get density range (equation solution),from which the optimum solution can be chosen successfully. In the second one,with the use of the relation between interval velocity and density,we do joint inver-sion of seistnic two-way travel times and observed gravimetric data to obtain the re-sults which are similar to seismic interpretation results.