高矿化度油藏“强化泡沫+凝胶”调驱实验研究

An Experimental of“Enhanced Foam+Gel”Flooding in High Salinity Reservoirs

春光油田稀油油藏已经进入高含水、高采出程度和产量递减的开发阶段。针对目前新增储量减少,剩余油分散,挖潜难度大等问题,油田亟需转换新的开发方式,从而进一步挖潜剩余油,实现油田稳产。在春光油田油藏条件下开展了“强化泡沫+凝胶”调驱实验研究,对比不同介质驱替结果表明,0.4%P2-1+0.1%温轮胶强化泡沫体系的提高采收率效果远优于单一介质体系。不同介质小段塞多轮次注入实验结果表明,在段塞用量相同时,注入轮次越多,小段塞越多,提高的采收率就相对更高,增加小段塞可以增加段塞体系对油藏的深部非均质调控能力和波及体积,进而提高驱油效率和实现较大幅度提高采收率。

Chunguang Oilfield have entered into the development stage of high water content,high recovery and production decline.In view of the current problems such as the reduction of new reserves,the dispersion of remaining oil,and the difficulty of tapping potential,the oilfield urgently needs to a new development mode so as to further tap the potential of the remaining oil and achieve stable production of the oilfield.The experiment of“enhanced foam+gel”flooding was carried out,and the results of different media displacement showed that the enhanced oil recovery effect of the 0.4%P2–1+0.1%warm rubber reinforced foam system was much better than that of the single media system.The results of multi-round injection experiments with different media show that when the amount of slug is the same,the more injection rounds and the more slug plugs,the higher the enhanced oil recovery,and the increase of slug can increase the coverage and permeability area of the slug system to the reservoir,thereby improving the driving effect of crude oil and increasing the oil recovery.