摘要
本文基于实际工程应用中的阵列感应测井仪 (AIT)的测量信息 ,利用变分玻昂迭代法 (VBIM) ,在非均匀背景介质中来重构和反演地层的电导率剖面 .该方法基于非线性积分方程 ,利用变分方法来建立反演方程 .在反演迭代过程中 ,非均匀背景介质中的格林函数无须更新 ,与变形玻昂迭代法 (DBIM)相比其计算复杂性大大降低 .文中仅利用沿井轴的AIT响应对地层电导率进行反演 ,其结果表明 ,反演结果与真实地层电导率分布吻合的较好 .
In this paper we present a new iteration method,namely,the variational Born iteration method (VBIM) to inverse the formation conductivity using measurement data from the array induction tool (AIT).Based on nonlinear integral equation,the inversion equation is derived by using the variational principle.In each iteration of VBIM,a numerical mode matching method (NMM) is used to solve the logging responses of the AIT.Numerical simulation has shown that this method is easier than the DBIM.The inversion results are in agreement with the true conductivity profile by using multi information of array on the axis of the borehole.
出处
《电子学报》
EI
CAS
CSCD
北大核心
2000年第6期135-137,130,共4页
Acta Electronica Sinica
基金
国家自然科学基金!(No.498740 32 )资助课题
关键词
电磁逆散射
二维轴对称电导率分布
阵列信息
inverse scattering
variational Born iteration method
array induction tool
multi information of array
geophysical well logging
