一种新的计算三元复合驱渗流规律的方法

A New Method to Calculate the Seepage Law of ASP Flooding

为突破三元复合驱渗流规律研究瓶颈,提出以流度变化来代替三元复合驱驱油过程中黏度变化对渗流规律的影响,简化渗流运动方程,利用稳态法和非稳态法实验数据拟合方程参数。通过该方法可处理得到两相流度曲线,并推导出考虑流度变化下的无因次采液、采油指数计算方程。通过实例验证及方法对比,发现该方法计算简便,准确性较高。该方法的优点是避开了三元复合驱渗流过程中需要考虑复杂的物理化学变化对流体黏度的影响,直接反映流体的流动能力,为研究三元复合驱渗流规律提供了新思路和方法。

In order to break through the bottleneck of the study on the seepage law of ASP flooding,the effect of viscosity change on the seepage law is replaced by the change of fluidity,the equation of seepage motion is simplified,and the parameters of the equation are fitted with the experimental data of steady-state method and unsteady method.The two-phase fluidity curve can be processed by this method,and the calculation equation of dimensionless production fluid and oil recovery index is derived considering the fluidity change.The method is proved to be simple and accurate by example verification and comparison.The advantage of this method is that it avoids the influence of complex physical and chemical changes on fluid viscosity in ASP flooding,directly reflects fluid flow capacity,and provides a new idea and method for the study of ASP flooding seepage law.