Structure Design And Optimization Of Two Groups Of Excitation Electromagnetic Correlation Method Flow Sensor

With the development and maturity of domestic horizontal well technology,the number of horizontal wells has increased year by year.Due to the long-term exploitation of horizontal wells,local flooding and degassing are likely to occur,so that the horizontal wells are to be converted into oil-gas-water three-phase flow mixed fluids containing “associated gas”,and the “associated gas” involved in the oil and gas.The influence of factors such as gravity,content rate and flow velocity on the phase flow makes the fluid in the horizontal well flow non-axisymmetric flow field distribution,which leads to the difficulty in measuring the multi-phase flow parameters of oil and gas in the horizontal well.Therefore,in the horizontal well production logging process,in order to accurately grasp the specific conditions of each production layer in the oil well,timely guide and optimize the oilfield production plan,there is an urgent need to effectively measure the fluid flow parameters of the oil well water three-phase flow in the horizontal well.New methods,new technologies.This paper intends to study the flow measurement of non-axisymmetric flow field distribution of oil and gas multiphase flow in horizontal well production logging.Firstly,the application background of multi-phase flow measurement of oil and gas in horizontal wells in oil production logging is introduced.Based on the existing deficiencies of current flow measurement methods and equipment in the measurement of oil and gas three-phase flow in horizontal wells,a multi-electrode is proposed.A multi-electrode twogroup excitation electromagnetic correlation flow measurement sensor structure model is proposed to solve the problem of oil-water-water three-phase flow measurement in horizontal well production logging.Secondly,the simulation model of multi-electrode double-group excitation electromagnetic correlation flow sensor is established,and the magnetic field theory of the sensor is analyzed.At the same time,the internal magnetic field distribution of the electromagnetic correlation method flow sensor of different sets of excitation coils is studied.Thirdly,the design optimizes the multi-electrode double-group excitation electromagnetic correlation flow measurement sensor to detect the electrode size and the distance between the upstream and downstream detection electrodes to ensure that the electric fields generated by the upstream and downstream detection electrodes do not interfere with each other,and make the upstream and downstream two The group detection electrode output signals have a certain correlation.Finally,the structure of the excitation coil is related to the uniformity of the magnetic field distribution in the pipeline.The excitation coil structure of the multi-electrode doublegroup excitation electromagnetic correlation flow measurement sensor is designed and optimized,and the internal excitation parameters are used to obtain the optimal excitation coil structure parameters.