Theoretical Simulation and Application of High Frequency Electromagnetic Wave Propagation Logging

High frequency electromagnetic wave propagation logging technology is an important method in geophysical exploration. Since the dielectric constant of water is much greater than that of oil, gas, and rock matrices, it is less affected by fluid salinity, and can accurately evaluate and identify complex reservoir fluids such as freshwater reservoirs, water flooded reservoirs, and thin interbeds with unknown salinity. Firstly, based on the equivalent magnetic dipole model, this paper derives the propagation formula of high-frequency (1 GHz) electromagnetic waves in two-layer media, proposes a finite element accurate simulation method incorporating engineering parameters of dielectric measurement plates, and constructs a 1:1 accurate simulation model of measurement plates of high-frequency electromagnetic wave propagation logging tools. By comparing the simulation results based on the two models, the influence of electrode plate parameters on the formation conversion chart is analyzed. Based on theoretical research guidance, a high-frequency electromagnetic wave propagation logging tool was developed and applied in an oilfield.