注入方式对稠油驱油效果影响的实验研究

摘要

In order to solve the problems such as high crude oil viscosity,low efficiency of conventional water injection and fast formation pressure drop,Long 618 block is a conventional heavy oil block located in Liaohe oil field.The core experiment is carried out to study the effect of injection method on oil displacement efficiency.The results show that the oil displacement effect of the low-concentration large slug is better than that of the low-concentration slug with high concentration and large slug,and the injection of small amount of gel slugs can increase oil recovery.%龙618区块是位于辽河油田的一个常规稠油区块,为了解决原油粘度高,常规注水开发效率低以及地层压力下降快等问题,进行室内岩心实验,研究化学驱注入方式对驱油效果的影响.结果表明:前置高浓度小段塞后续低浓度大段塞的驱油效果好于前置高浓度大段塞后续低浓度小段塞的驱油效果,并且二元主段塞注入前注入少量凝胶段塞可以调高采收率.