表面活性剂驱室内评价实验研究

Experimental Study on Indoor Evaluation of Surfactant Flooding

三次采油是油藏水驱开发之后提高原油采收率的重要途径,表面活性剂驱是三次采油技术中的重要组成部分,对提高高温高盐油藏采收率起到了较好的效果;表面活性剂通过降低油水界面张力或改变储层岩石润湿性来提高洗油效率,表面活性剂溶液的浓度、注入倍数、注入时机直接影响原油最终采收率,结合实际区块岩石,通过室内表面活性剂驱替实验优选出表面活性剂以及相应的注入参数,应用于该油田区块,原油递减趋势明显变缓,增油效果很好。

The tertiary oil recovery is an important way to improve the oil recovery after the waterflooding of reservoir. The surfactant flooding is an important part of the tertiary oil recovery technology and has good effect on improving the recovery of high temperature and high salt reservoirs. The concentration, injection factor and injection time of surfactant solution directly affect the final recovery of crude oil. In this paper, combined with the actual block rock, through the indoor surfactant displacement experiment, suitable surfactants and corresponding injection parameters were screened out. And they were applied in a block of the oilfield, the decreasing trend of crude oil production was slowed down and the stimulation effect was good.