Research on the Inversion Method of Transient Electromagnetic Logging Based on Wavefield Transformation

The theory of traditional inversion methods of transient electromagnetic data is relatively complex and the accuracy is not high, so a transient electromagnetic logging inversion method based on wave field conversion is proposed to study. There is a conversion relationship between the time-domain magnetic field and the virtual wave field, and the magnetic field data calculated by numerical simulation through finite element software is converted into the virtual wave field information. The virtual wave field characteristics are related to the electrical parameters of underground media, so the inversion of transient electromagnetic logging can be realized.