复杂断块油田油井流入动态曲线预测方法

Forecasting approach of inflow performance relationship(IPR) curve of oil well in complex fault-block oilfield

复杂断块油田油水关系复杂,随着开发的不断深入,油井产量受含水率、井底流压影响较大,为了保持稳产,需对开发方案进行阶段性调整。油井流入动态曲线既是分析油井动态的基础,又是确定油井合理工作方式的依据,因此,准确预测油井流入动态对油井的方案设计和调整至关重要。综合考虑含水率、井底流压对油井产能的影响,利用相渗曲线和新型IPR方程,计算出各含水阶段油井的流入动态,并将该方法应用于秦家屯油田SN142区块,预测了该区块不同含水条件下油井流入动态参数,结果表明该方法在实际应用中效果良好,对同类油田的开发具有一定的借鉴意义。

Due to the complex oil - water relationship in complex fault - block oilfield, with the deepening of the development, oil production is greatly affected by water - cut and flowing bottomhole pressure. In order to maintain oil - production stability, the development plan should be adjusted periodically. So,it is very important to accurately predict IPR curve for the design and adjustment of development plan of oil well because the IPR curve is not only the basis of the well performance analysis, but also the foundation of determining the reasonable working system of the oil pumping unit. Considering the influence of water - cut and flowing bottomhole pressure, the IPR curves in the condition of various water - cut stages were calculated by using the relative permeability curves and the new IPR equation. The method has been applied in SN142 block of Qinjiatun Oilfield to forecast parameters of oil - well inflow performance in different water - cut stages. The result indicates that the method got very good results in practical application, and has a certain reference for the development of the same type oilfield.