The analysis and study on electromagnetic field of conductance water fraction sensor

The basic principle of conductance sensor on the measurement of water fraction in oil-gas-water three phase flow is introduced and the mathematic model is described. The 2-D and 3-D electromagnetic field simualtions have been implemented based on the method of finite element analysis. The optimal parameters of conductance sensor are obtained by analyzing the ANSYS simulations. According to the parameters, a conductance sensor which can be applied to measure water fraction for 2 7/8 oil pipe is designed and constructed. The indoor oil-gas-water experiments have been performed using the conductance sensor with optimal parameters and the experimental results coincide with theoretical simulations. It shows that the parameters obtained by analyzing and studying electromagnetic field of conductance sensor are feasible.