水平井三元复合驱流入动态耦合模型研究

摘要

Based on the power law rheology model of alkali‐surfactant‐polymer (ASP) fluid ,the seepage flow model of ASP flooding for horizontal wells and the variable mass flow model in horizontal wellbore are established .Then the horizontal wells performance prediction model is set up by coupling the seepage flow model and the variable mass flow model.The influence of power law index and consistency factor on horizontal well production has been studied .The results indicate that the IPR curve of ASP flooding is concave upward .The production decreases with increasing of the value of the power law index and consistency factor .In different flooding periods ,the IPR curves is different .The corresponding IPR curve should be used to predict the production in different flooding periods .The prediction results can basically meet the actual requirements ,which provides a basis for the parameter control of three element composite flooding in horizontal wells.%基于三元复合驱溶液的幂律流变模式,建立了水平井三元复合驱渗流模型和井筒变质量流动压降模型,耦合得到了三元复合驱水平井流入动态预测模型,分析了流性指数和稠度系数对水平井产能的影响.结果表明,三元复合驱生产油井IPR曲线是向上凹的;随着流性指数和稠度系数的增加,水平井产量降低;不同驱替阶段三元复合驱的IPR曲线不同,产能预测时要选择相应阶段的IPR曲线;产能预测结果基本满足现场要求,为现场进行水平井三元复合驱参数控制提供了基础.