CO_2驱最小混相压力预测新方法

A new Minimum Miscibility Pressure Prediction Method of CO_2 Flooding

油藏CO_2驱开发中,最小混相压力(MMP)是驱油效果评价的一个重要基础参数。本文从溶解度参数计算出发,结合多组油样的MMP实验测定结果,提出了一种简单的CO_2驱油MMP预测方法。运用本方法,仅需要油藏温度、原油粘度两个参数,即可较好的预测CO_2驱最小混相压力。本文运用该方法举例计算了油藏温度、原油分子量对MMP的影响规律。该方法的提出实现了MMP的快速预测,适用于CO_2驱油潜力区块筛选阶段的混相能力评价,适合现场推广应用。

Minimum miscibility pressure(MMP)is an important parameter of oil displacement effect evaluation in CO_2 flooding.Using the solubility parameter calculation method,and combined with the experimental data of minimum miscibility pressure(MMP)determination,this paper explores a simple MMP prediction method.Using this method,which only reservoir temperature and crude oil viscosity needed,Satisfactory performance results is obtained.Use this method,this paper discussed Influences of temperature and crude oil molecular weight on MMP.The proposed method realizes fast prediction of MMP,suitable for application in oil field screening phase for CO_2 flooding evaluation.