基于积分方程法的任意形状源多次激发三维电磁场反演  

3D EM inversion based on arbitrary shape source multiple locations excitation

作　　者：李建平[1] 尚通晓[2,3] 关艺晓[2,3] 

机构地区：[1]山东科技大学山东省沉积成矿作用与沉积矿产重点实验室,青岛266590 [2]国土资源部地裂缝地质灾害重点实验室,南京210018 [3]江苏省地质调查研究院,南京210018

出　　处：《物探化探计算技术》2014年第4期394-400,共7页Computing Techniques For Geophysical and Geochemical Exploration

基　　金：国家自然科学基金项目(41104068);山东科技大学科研团队支持计划资助(2012KYTD101)

摘　　要：利用积分方程和阻尼最小二乘法,对任意形状源多个位置激发下三维异常体的电磁场进行了反演计算。计算中将任意形状源条件下多组激发点和接收点的电磁场数据统一考虑,求出了此种条件下的雅克比矩阵,反演得到了地下异常体的电阻率分布。模型试算结果表明,反演收敛速度快,对初值依赖性小,结果准确可靠。3D abnormal body;s electromagnetic field with arbitrary shape source multiple locations excitation can be inverted u-sing integral equation and damped least squares.Multiple groups of electromagnetic field data in different excitation and receiv-ing point to be uniform consideration in inversion,a matrix is obtained,distribution of resistivity of underground abnormal body is achieved.Model test shows that inversion of fast convergence speed,less dependent on the initial value,the result is accurate and reliable.

关 键 词：任意形状源 积分方程 多次激发 三维电磁场 反演 

分 类 号：O175.5[理学—数学]