【摘要】 针对目前油田高含水油水两相流流动复杂、通常存在于密闭管道难于在线检测等问题,本文提出了一种基于管内相分隔的高含水油水两相流双参数测量方法。通过旋流器将难以测量的细小、分散油滴集中到管道中心,形成油芯-水环的相分隔状态,引入轴向压差和径向压差,建立两个差压之比的实验关联式,结合电磁流量计和差压方法测量总流量和含水率。通过数值模拟方法对差压的取压位置进行了优化设计,并开展油水两相流双参数测量实验。实验结果表明,在84%～100%高含水率范围内,油水总流量和含水率的测量误差几乎都在±5%以内。这为高含水油水两相流实时测量提供一种新的双参数测量方法和理论指导。更多还原

【Abstract】 The high water-cut oil-water two-phase flow in the oil field is complex and usually exists in closed pipelines, so it is difficult for on-line measurement. In this paper, a dual-parameter measurement method of high water-cut oil-water two-phase flow based on phase-isolation was proposed. The small,dispersed oil droplets that were difficult to measure were concentrated to the center of the pipeline by the cyclone to form the phase-isolation with a phase distribution of oil core-water ring. The axial differential pressure and the radial differential pressure were introduced and the experimental correlation of the ratio of the two differential pressures was established. Then the total flow rate and water-cut were measured combined electromagnetic flowmeter with differential pressure method. The pressure taking position was optimized by numerical simulation method. And the double-parameter measurement experiment was carried out in oil-water two-phase flow. The results showed that the measurement errors of the total oilwater flow rate and the water-cut were both within ±5% in the range of 84%—100% water-cut. This work provides a new dual-parameter measurement method and theoretical guidance for on-line measurement of high water-cut oil-water two-phase flow.更多还原