波阻抗约束反演的几种方法

Several methods of impedance constrained inversion

介绍三种理论与实际效果比较好的波阻抗反演方法,即宽带约束反演(BCI)、快速模拟退火算法(FSA)和正则化方法。BCI是一种线性迭代方法,FSA是一种具有全局寻优特点的随机搜索方法,正则化方法是通过对目标函数施加先验约束,来解决反演的病态问题———多解性和不稳定性。最后,使用正则化方法并结合快速模拟退火算法,进行了理论模型试算和实际资料处理,实用效果比较好。

We introduce three impedance inverse methods which are good in theory and practice; broad-band constrained inversion （BCI）, fast simulated annealing algorithms （FSA） and regularization. BCI is a linear iterative method, FSA is a random searching method with global optimization, and regularization can solve illposed inverse problem by prior term, including multi-result and instability. Finally, we combine the regularization and the fast simulated annealing algorithms. Througn the tests of theoretic model and inversion of the field data, we get good effects.