Modification to mass flow rate correlation in oil–water two-phase flow by a V-cone flow meter in consideration of the oil–water viscosity ratio
Modification to mass flow rate correlation in oil–water two-phase flow by a V-cone flow meter in consideration of the oil–water viscosity ratio
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DOI：
10.1088/0957-0233/21/4/045403
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发表时间：
2010-03
影响因子：
2.4
通讯作者：
C. Tan;F. Dong
中科院分区：
文献类型：
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作者：
C. Tan;F. Dong
油水两相流广泛存在，其测量在石油测井、石油输送等领域具有重要意义。油水两相流流量测量中常用的技术之一是将混合物的质量流量与安装在管道内的节流元件产生的压差相联系的理论模型相结合的差压计。虽然已有的文献主要研究了差压计在气水两相流或湿气中的应用，但现有的差压计模型在油水两相流中的适用性还不高。在直径为50 mm的水平管中进行了一系列油水两相流实验，流量测量采用直径比为0.65的V型锥流量计。研究了现有的气水两相流差压计的关联式，并与V型锥差压计的实测数据进行了比较。根据油液粘度对压差模型的影响，结合三维流体动力学（CFD）模拟，提出了一种修正的关联式。结果表明，该方法在油水两相流流量测量中的精度优于其他DP关联式，通过调整因子，该方法可以推广到其他油水两相流条件下。
Oil–water two-phase flow widely exists and its measurement is of significance in oil well logging, oil transportations, etc. One of the techniques in common use in oil–water two-phase flow rate measurement is the differential pressure (DP) meters combining a theoretical model connecting the mass flow rate of the mixture with the differential pressures generated by the throttling element installed inside the pipeline. Though a number of publications focus on DP meters in measuring gas–water two-phase flows or wet gas, the existing models are still not very compatible in oil–water two-phase flow. In this work, a series of oil–water two-phase flow experiments were conducted in a horizontal pipe of 50 mm diameter and the flow rate was measured by a V-cone meter with a diameter ratio of 0.65. Available correlations of DP meters developed from gas–water flow are studied and compared with the measured data from the V-cone meter. A modified correlation is proposed based on the influence of viscosity of oil upon the differential pressure model and three-dimensional computerized fluid dynamic (CFD) simulations. The results have shown that the proposed method achieves better accuracy in oil–water two-phase flow rate measurement than other DP correlations, and it can be extended to other oil–water flow conditions by adjusting the tuning factor.