瞬变电磁虚拟波场反变换技术研究  

Virtual Wave Field Inverse Transform Technology of TEM

作　　者：张军 吴琼[2] 李貅[3] 

机构地区：[1]中煤科工集团西安研究院有限公司,陕西西安710077 [2]中国地质科学院地球物理地球化学勘查研究所,河北廊坊065000 [3]长安大学地质工程与测绘学院,陕西西安710054

出　　处：《工程地球物理学报》2015年第6期713-720,共8页Chinese Journal of Engineering Geophysics

基　　金：国家自然科学基金项目(编号:40774066)

摘　　要：为了进行瞬变电磁数据虚拟波场反变换技术的研究,为后期瞬变电磁数据处理打下基础,首先推导出了满足波动方程的"虚拟波场"和满足扩散方程的电磁场之间的积分关系式的方法,然后采用线性数字滤波法求解这两类积分,研究了子波的宽度、峰值位置和相邻子波距离等因素与波场反变换精度之间的关系,最后分析了各响应曲线的形态。通过波场反变换研究发现,在与已知的单位向量和高斯脉冲作对比时,验证了算法的有效性与可靠性。The purpose is to study the inverse transformation of the transient electromagnetic data.In this study,the linear digital filtering method is used to solve the integral relationship between the virtual wave field and the electromagnetic field which satisfies the wave equation.The linear digital filtering method is also used to solve these two kinds of integrals,and the shapes of the response curves were analyzed.Through the study of the inverse transformation of the wave field,the validity and reliability of the proposed method are verified by comparing the known unit vector with Gauss pulse.

关 键 词：瞬变电磁法 汉克尔积分 波场变换 正则化共轭梯度法 

分 类 号：P631.3[天文地球—地质矿产勘探]