关键词: 油气水三相流 , 非线性检验 , 电导波动信号 , 替代数据

Abstract: Based on the conductance fluctuation signals measured from vertical upward oil-gas-water three-phase flow experiment, we use surrogate data method to investigate dynamical characteristics of oil-in-water type bubble and slug flows. The results indicate that oil-in-water type bubble flow will tend to deterministic motion behavior with the increase of oil phase fraction( ) and superficial gas velocity( ) under fixed flowrate of oil and water mixture; The dynamics of oil-in-water type slug flow will become more complex with the increase of under fixed flowrate of oil and water mixture; The change of will result in irregularly influence on the dynamics of slug flow. These interesting findings suggest that the surrogate data method can be a faithful tool for characterizing the dynamic characteristics of oil-in-water type bubble and slug flows.

Key words: oil-gas-water three-phase flow, nonlinear test, conductance fluctuating signals, surrogate data