摘要
本文围绕一维全资料CSAMT反演探讨了一种用于层状地层的反演方法。该方法将网格参数法和剥层法联合应用,并使用两个控制参数作约束,使反演结果更理想。网格参数法和剥层法的联合应用具有反演参数少,不依赖初始模型的优点。文中给出了四个三层及两个五层数字模型进行实验,反演结果表明,该方法能够再现模型的层状结构,而且对噪声有一定的抑制能力。将反演方法用于具有层状分布的实际资料,其反演结果与地质资料基本吻合。这种方法避免了近场校正带来的误差,为全资料CSAMT反演的可行性提供了依据。
About the inversion of 1-D full CSAMT data,the paper discusses an inverted approach used in layered strata.The approach combines the network parameter method with layer-stripped method and uses two controlling parameters as a constraint that makes the inverted results better.Combination of the network parameter method with layer-stripped method is characteristic of fewer inverted parameters and free from relying on initial model.The paper gives four three-layer and two five-layer numeric models to implement tests,which show the approach can rebuild the layered structures of models and have certain ability for suppression of noises.Using the inversion for real data of layered distribution,the inverted results are coincidence with geologic data basically.The approach avoids the error brought by near-field correction,which provides a basis for the feasibility of inversion of 1-D full CSAMT data.
出处
《石油地球物理勘探》
EI
CSCD
北大核心
2007年第1期107-114,共8页
Oil Geophysical Prospecting
基金
973项目(2002CB412702)资助
