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针对倾斜油藏CO2驱油过程中的黏性指进问题,建立了CO2驱油黏性指进模型,并对其进行了求解。重点分析了CO2的特性、驱油速度、原油黏度、渗透率和沉积韵律对黏性指进的影响。研究结果表明:在驱油过程中,由于CO2的降黏作用,减缓了指进;随着驱油速度的增大,指进程度加重;随着渗透率的增大,指进程度减缓;反韵律地层较正韵律地层的指进程度严重;随着原油黏度的增大,指进程度加重。
Aimed at the problem of viscous fingering during CO2 flooding in slanted reservoirs, a viscous fingering model for CO2 flooding was established and solved. Focus on the CO2 characteristics, oil displacement rate, viscosity of crude oil, permeability and sedimentation rhythm sticky fingering. The results show that: in the process of oil displacement, due to the decrease of CO2, the index is slowed down; with the increase of oil displacement rate, the degree of index increase; with the increase of permeability, The prosodic strata are more serious than the prosodic strata. As the viscosity of crude oil increases, the degree of fingering increases.