标量CSAMT只适合一维及测量方向与构造方向垂直的二维情况,对于复杂的三维地电结构,CSAMT需采用张量测量。本文试图采用矢量有限元法实现三维张量CSAMT的正演模拟。为了验证算法的正确性,本文在层状介质中计算了三维CSAMT远区的电场,磁场及阻抗张量,并且与层状介质中的理论解进行了比较,接着还模拟了均匀半空间中含有三维异常体的模型,并且分析了四个阻抗张量、视电阻率及阻抗相位的响应特征。得出如下结论:采用矢量有限元法来模拟三维张量CSAMT,其电磁场及阻抗张量的实虚部计算精度都比较高,并且该方法本身满足电场法向不连续,不用进行散度校正。 The scalar CSAMT is only suitable for two-dimensional cases with one-dimensional and vertical direction of the measurement direction. For complex three-dimensional geoelectric structures, CSAMT needs to use tensor measurement. This paper attempts to use the vector finite element method to achieve forward modeling of three-dimensional tensor CSAMT. In order to verify the correctness of the algorithm, we calculate the electric field, magnetic field and impedance tensor in a three-dimensional CSAMT far-field in layered media and compare it with the theoretical solution in layered media. Then, Three-dimensional anomalous body model, and analyzes the four impedance tensor, apparent resistivity and impedance phase response characteristics. The conclusion is drawn as follows: The simulation of three-dimensional tensor CSAMT using the vector finite element method shows high accuracy of the real part of the electromagnetic field and the impedance tensor, and the method itself does not need to be corrected for the divergence of the electric field.