水平井油气水三相流入动态研究

Research on inflow performance relationship of oil - gas -water three phases for horizontal wells

针对目前流入动态计算方法在计算水平井油气水三相流体产能时存在的问题,基于Petrobras关于垂直井油气水三相流入动态的研究思路,用修正的Cheng方法描述其中的油相流入动态,建立了水平井油气水三相流入动态的计算模型,并分析了水平井井筒变质量流动阻力对水平井流入动态计算的影响。研究结果表明,目前常用的Borisov方法、Giger方法、Joshi方法、Renard方法以及Cheng方法在计算水平井油气水三相流入动态时存在较大误差,建议采用该模型计算水平井油气水三相的流入动态。

The calculated results of many former methods of IPR for the productivity of oil,gas and water phases in horizontal wells are not satisfactory. A new calculation model is presented and can be applied to the three - phase inflow performance calculation of horizontal wells based on Petrobras's research idea about the vertical wells. In the model, oil phase inflow performance is described by revised Cheng method. Moreover,the effect of flow resistance with changing mass flowrate of horizontal well-bore on the calculation of IPR is analyzed. The study shows that the calculations of Broisov's method, Giger' s method, Joshi's method, Renard's method and Cheng's method have significant errors when they are used to calculate three - phase IPR of the horizontal wells,and the new method should be a-dopted.