Most old oil fields face complex situations of high water cut

low production

and carried solid impurity in their production wells.The existing downhole water cut measurement equipment has many limitations in applicability.Inductive sensors have the characteristics of non-contact with fluids

high precision

and no moving parts

and show high reliability and good application prospects.However

the magnetic field range of the studied inductive sensor is small

and the measurement precision needs to be improved.On this basis

the structure of the sensor is improved

and a new-structure inductive sensor with higher precision in measuring the water cut of oil-water two-phase flow and a larger magnetic field range is developed.By comparing the theoretical calculation and magnetic field simulation analysis

the difference between the two is 1.25%

indicating a higher degree of conformity between the analytical model and numerical simulation and demonatrating that the new-structure inductive sensor has higher accuracy.Subsequently

an indoor static method experimental prototype is constructed

and different volumes of non-conductive oil phases are simulated using insulating columns of different volumes

confirming the feasibility of water cut measurement using sensors when water is a continuous phase.The maximum relative response deviation of the sensor output voltage is less than 0.05

indicating that the sensor has excellent stability.The experiment evaluates the influence of factors such as the conductivity of mixed-phase fluid and external environmental temperature on the response characteristics of sensors

which is helpful for the on-site practice of engineering applications.