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针对岩层中介电常数和磁导率随深度变化的情况,给出水平磁偶极子源电磁场的水平或垂直空间分布特征及相应的变化规律。采用Kong给出的汉克尔(Hankel)J0变换线性滤波器(241点)和汉克尔J1变换线性滤波器(241点)算法,选用均匀大地和两层地电模型,讨论介质的介电常数和磁导率变化时的水平磁偶极子电磁场空间分布特征。计算结果表明,磁场的Hx分量幅值与磁导率反相关;磁场Hz和电场Ey分量随着磁导率的增大而增大;低频电磁测深中介电常数变化时对电磁场基本没有影响。
Aiming at the variation of dielectric constant and permeability with depth in rock strata, the horizontal or vertical spatial distribution of horizontal dipole magnetic field and its corresponding variation are given. Using the Hankel J0 transform linear filter (241 points) and the Hankel J1 transform linear filter (241 points) algorithm given by Kong, we choose a uniform earth and two layers geoelectric model to discuss the dielectric The Spatial Distribution Characteristics of Horizontal Magnetic Dipole Electromagnetic Fields with Constant and Permeability Change. The results show that the amplitude of Hx component of the magnetic field is inversely related to the permeability; the magnetic field Hz and the Ey component of the electric field increase with the increase of permeability; and the change of the dielectric constant in low frequency electromagnetic sounding has almost no effect on the electromagnetic field.