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Experimental study on multi-slugs parallel gathering energy for enhancing oil recovery after polymer flooding
Author(s): 
Pages: 110-113
Year: Issue:  1
Journal: Acta Petrolei Sinica

Keyword:  heterogeneous reservoirpolymer floodingoil recoverymulti-slugs parallel gathering energy technologyremaining oil displacementlaboratory experiment;
Abstract: 聚合物驱后还有50%左右的剩余油,主要分布在聚合物未波及到的次一级孔隙中.通过依次注入不同黏度和性质的功能段塞,在不同渗透率区域形成均匀移动的驱油段塞,增大局部驱替压力梯度,挖潜中、低渗透区的剩余油.室内实验表明:注入多个轮次的功能段塞后,再进行水驱,原油采收率达到89.15%,比聚合物驱采收率提高32.78%.相比于其他开采技术,多段塞平行聚能驱油的产液含水率更低;三个岩心实验的产液量比率趋向于...
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