油、气、水三相混合物的流动规律较单相或气液两相流动更为复杂，然而目前主要采取单相流方法来计算三相节流阀的流通能力。为了更精确地对油气水三相节流阀流通能力进行计算，以油气水三相介质流过节流阀时的能量守恒方程为基础，考虑节流时的临界流动和亚临界流动两种状态，建立了油气水三相节流阀流通能力计算模型；采用二分法对模型进行了求解，并编制了相应的计算软件。以此为基础，结合番禺35-1气田的实际油气生产数据，分析对不同开度，不同节流前压力和不同节流后压力下流经阀门的总质量流量，验证了方法的准确性。%The flow rule of oil-gas-water three-phase flow is more complex than single-phase flow and two-phase flow. However, now calculation method of three-phase flow is the same as the calculation method of single-phase flow. In order to calculate the flow capacity of three-phase flow through throttle valve more accurately, the calculation method of three-phase flow was established based on fluid mechanics and thermodynamics. Dichotomy was used to solve the model and the calculation software was developed. Using this method, a lot of calculations were conducted for the production data of PY35-1 gas field. The results show that there is a proximate linear positive correlation between the opening of the value and the flow capacity. With the increase of the pressure before throttling, the flow capacity increases, while decreases with increasing of the pressure after throttling.
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