摘要
在可控源大地电磁数据一维反演方法中,用简单的层状模型来描述地下介质的电性分布是不符合真实情况的,奥克姆(Occam)法反演就是考虑地下介质随深度分段连续的变化,考虑了地质结构的纵向和横向的光滑情况,在构造目标函数加上一光滑限制函数,在反演的结果可以得到比较光滑的地下介质模型。本文阐述了奥克姆(Occam)反演的原理方法,通过理论模型进行了验证,得到了较好的效果,对工程实例进行合理的反演解释。
In the method of electromagnetic sounding data 1D inversion, it is not appropriate to describe the distribution of the stratum medium with a simple layer model. The Occam＇s inversion method takes the continuous change with the stratum medium depth and the smooth of the geological structural vertical and horizontal direction into consideration. therefore, the smooth restriction function added to the original function forms an unconstrained function and the result of inversion would obtain a smooth model. The paper describes the Occam inversion theory, constructs a theoretical model to be testified, and presents an example of the Occam＇s inversion technique.
出处
《工程地球物理学报》
2008年第4期439-443,共5页
Chinese Journal of Engineering Geophysics
基金
国家自然科学基金(40744022)
湖北省自然科学基金项目(2007ABA317)资助
