AS体系与泡沫交替注入提高采收率技术研究

Improve recovery factor by alternating injection of AS system and foam

针对聚合物驱后油层孔隙结构的变化和剩余油的分布特点,从提高油层的宏观波及体积和微观洗油效率入手,提出了一种新的提高原油采收率的方法,即AS体系与泡沫交替注入提高采收率技术。通过测试界面张力实验对表面活性剂进行了优选,并结合泡沫的特性,从驱油机理上进行了分析论证。

In order to improve macro swept volume and micro displacement efficiency, a new EOR method, i.e. alternating injection of AS system and foam is proposed according to the change of reservoir pore structure and residual oil distribution after polymer drive. The surfactant is optimized through interfacial tension test. The mechanism of oil displacement is demonstrated combining with foam features.