中文摘要：

针对油井流压较低时油层内为油、气、水三相渗流的情况，考虑油、气、水三相渗流速度差别，建立了油、气、水三相流动能力系数的计算模型，并以此为基础修正了经典的Vogel方程，建立了新型油井流入动态模型。模型具有拐点特征，即当流压较低时会出现油井产液量随流压降低而下降的现象。仿真结果表明，在油藏参数一定条件下，含水率是影响最小流压界限（最大产量点所对应的流压）的主要因素，最小流压界限随含水率的增加而下降。杏南油田最小流压界限为0．5～1．5MPa。

英文摘要：

In the light of the fact of the three-phase flow （ gas, oil and water ） in the oil layer when the oil well flowing pressure is relatively lower, the calculating model of the flowabitity parameters for the above performance is established by considering the differences in the three-phase flow velocities. On the basis of the above, the classic Vogel equation is modified and a new IPR （ inflow-performance relationship） model is also setup. The model is characterized by inflection point, namely, liquid production decreases with the drop of the flowing pressure when the flowing pressure is relatively lower. The simulated results show that under the conditions of the defined oil-reservoir parameters, the water cut is the primary factor of influencing the minimum flowing pressure limit （ i. e. the corresponding flowing pressure of the maximum production point） , and moreover the minimum limit decreases with the increase of the water content ratio. The minimum flowing pressure limit in Xingnan Oilfield is 0. 5m-1. 5 MPa