半航空时间域电磁数据一维自适应正则化反演  

An adaptive regularized inversion of 1D semi-airborne time-domain electromagnetic data

作　　者：张澎[1] 余小东[2] 许洋[3] 吕仁斌 陆从德[2,4] 

机构地区：[1]成都理工大学信息科技与技术学院,成都610059 [2]成都理工大学地球物理学院,成都610059 [3]四川省蜀通岩土工程公司,成都610081 [4]成都理工大学地球勘探与信息技术教育部重点实验室,成都610059

出　　处：《物探化探计算技术》2017年第1期1-8,共8页Computing Techniques For Geophysical and Geochemical Exploration

基　　金：国土资源行业专项(201311037)

摘　　要：半航空时间域电磁法集成了地面和航空电磁法各自的优势,不仅容易实现大发射磁矩,增大勘探深度,同时还可以提高勘探效率。但是由于半航空时间域电磁法在测量过程中,收、发距会发生变化,因此与地面和航空电磁法相比,其数据处理与反演解释更加困难。以长导线电性源半航空电磁法为例,将自适应正则化反演算法应用于半航空时间域电磁数据反演中。首先给出最平缓模型约束条件下的半航空时间域电磁数据自适应正则化反演算法,并引入并行技术实现了该反演算法的并行计算;然后对两种三层地电模型和一种六层地电模型的理论电磁响应加高斯白噪声后的数据进行反演计算;最后对其反演结果和并行计算的效率进行了详细地分析与讨论。实验结果分析表明:自适应正则化反演算法是一种有效的半航空时间域电磁数据反演解释方法,该方法具有很好的收敛性和稳定性;自适应正则化反演算法并行计算能大大减少反演计算时间,提高反演效率。Semi-airborne time-domain electromagnetic method（SATEM）combined with the advantages of ground and airborne electromagnetic method not only has large magnetic moment,but also has deep exploration depth.At the same time,it can improve the efficiency of exploration.However,in the measurement process of SATEM,the distance between transmitter and receiver may change.So,the SATEM data processing and inversion are harder than ground and airborne EM.Few of studies on the inversion method for SATEM data has been conducted currently.In this paper,based on long wire grounded source SAEM,the adaptive regularized inversion algorithm（ARIA）is applied to the inversion of SATEM data.Firstly,this paper describes the ARIA of SATEM data under the most gentle model constraints,and introduces the parallel technology to achieve the parallel computation of this inversion algorithm.Then,we get the inversion results of the theoretical response data with Gauss white noise of two three layers model and one six layers model.At last,we analyze the inversion results and the efficiency of parallel computation.The test results show that ARIA is an effective SATEM data inversion method,it has good convergence and stability.The parallel computation of ARIA can greatly reduce the inversion calculation time and improve the efficiency of inversion.

关 键 词：半航空时间域电磁法 一维反演 自适应正则化 并行计算 

分 类 号：P631.3[天文地球—地质矿产勘探]