In order to solve the urgent need and to fill the lack of monitoring devices for oil-gas-water three-phase flow parameters at the surface single wellhead for long-term,stable and reliable use in the field of petroleum production.The numerical simulation model of the developed monitoring device is established by the finite element method,and its structural parameters,electrical characteristics,sensitivity distribution and response characteristics are analyzed and optimized,so as to determine the optimal structure and optimal performance index of the monitoring device.On this basis,a permanent surface single wellhead conductance array multi-component measurement device for oil production(PSSWCAMMD_OP)is developed,and experimental research is carried out on the constructed conductance array multi-component measurement platform.The experimental results show that the measuring device has the characteristics of oil-gas-water three-phase flow conditions such as gas phase flow rate of 5～20 m3/d,liquid phase flow rate of 30～70 m3/d,and liquid phase water holdup of 70%～90%.Good multi-component measurement performance,multi-component measurement error is less than3.7%.
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