Modelling and analysis for total flowrae and flowrate fraction measurements of oil/gas/water three phase flwo in oil downholes

摘要

Flow of oil-gas-water misture frequently occurs during oil pordcuction in Daqing Oil Field.Mesurement of the multiphase flow is required for opticmal reservoir management and field develoment.In order to know the production perormance of every zone underground - i.e. the total flowrate and the compositional flowrate,the Annulus Three Phase Flow Tool(TPFT) has been used in oil/gas/water three phase flwo pumping wells with a high perent of gas.In this paper,firstly,an evaluation model of a concentration type turbine flowmeter has een developed to predict the total flowrate.Then,the model of flowrate fraction determination of the composition is established.The accuracies of these models are given by comparing the predications of each model with the flwo loop set values.It is shown that the proposed models are satisfactory for production logging applications.