水平管内油气水三相流动规律研究

Three-Phase Oil-Air-Water Flow in Horizontal Pipes

油气水三相混输技术已在海洋和沙漠油田得到广泛的应用,三相流动规律的研究是十分必要的。在长62 m、内径25.7 mm的不锈钢管水平环道上,对油气水三相流型及油水反相进行了实验研究。实验油品的粘度为20 mPa.s(20℃),密度为855 kg/m3(20℃)。利用高速摄像技术,结合目测来判别流型,绘制了不同含水率情况下的油气水三相流型图。分析了含水率变化对三相流型的影响,并与经典的Taitel流型预测模型进行了对比,发现该模型适合于低含水率下的油气水三相流型预测。

The technology of oil-air-water mixed transportation had been applied in offshore pipelines,so it was very necessary to study the characteristic of three-phase flow.A series of oil-air-water three-phase flow experiments were carried out in a inner diameter of 25.7 mm,horizontal,stainless steel pipe,the focus was to study three-phase flow patterns and oil-water phase inversion.Air,tap water and white mineral oil（20 mPa·s viscosity,855 kg/m3 density at 20 °C） were used as test fluids.High speed photography was applied to determine flow patterns.Three-phase flow pattern maps on difference of the water volume fracture in the oil-water mixture（water-cut） were plotted,the effects of water-cut on three-phase flow patterns were investigated.The flow pattern maps developed were compared with a theoretical model,and it show that the model provides very close flow pattern predictions from experimental data at low water-cut.