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针对水平井筒中油水两相变质量流动,从理论和室内实验两个方面对分散流型下压降进行了研究,着重考虑壁面流体的流入对壁面摩阻系数的影响与不同流型间的转换。根据质量守恒、动量守恒方程,建立了水平井油水两相分散流型下压降预测模型。采用水、白油为实验介质,测量了水平管不同注入比、不同含水率下油水两相流压降值。实验结果分析表明,当含水率为40%时,油水发生反相,管道中流动压降最大,这和Brinkman/Roscoe混合黏度公式计算出的反相点一致。同时,压降模型预测结果与实验结果相比较平均相对误差为13.6%。
Aiming at the two-phase mass flow of oil and water in horizontal wellbore, the pressure drop under distributed flow regime is studied from two aspects of theoretical and laboratory experiments. The influence of wall fluid inflow on the friction coefficient of wall and the transition between different flow regimes . According to the conservation of mass and momentum conservation equation, the pressure drop prediction model for horizontal well two-phase dispersed flow pattern is established. Using water and white oil as experimental media, the pressure drop of oil-water two-phase flow with different injection ratios and different water cut rates was measured. The experimental results show that when the moisture content is 40%, the oil-water reverses and the pressure drop in the pipeline reaches the maximum, which agrees with the inverse point calculated by the Brinkman / Roscoe mixed viscosity formula. Meanwhile, the average relative error of the pressure drop model prediction and experimental results is 13.6%.