二元复合体系驱替聚驱后剩余油作用机理研究  

Study on Displacement Mechanism of Binary Composite System for Residual Oil After Polymer Flooding

作　　者：牛佳 孙丽艳[1] 董驰[1] 宋立甲 贾林 NIU Jia;SUN Li-yan;DONG Chi;SONG Li-jia;JIA Lin(College of Petroleum Engineering,Northeast Petroleum University,Daqing 163318,China;Zhanjiang Branch of China National Offshore Oil Corporation,Zhanjiang 524000,China)

机构地区：[1]东北石油大学石油工程学院,大庆163000 [2]中海石油(中国)有限公司湛江分公司,湛江524000

出　　处：《当代化工》2021年第8期1802-1805,共4页Contemporary Chemical Industry

基　　金：国家自然科学基金项目,驱油相自扩大波及体积提高采收率新方法(项目编号:51834005)。

摘　　要：海上稠油油田在聚驱之后仍然会有很大一部分剩余油,而聚合物和表活剂组成的二元复合体系用来驱替聚驱后残留剩余油效果显著,为了在微观和宏观上进一步研究二元复合体系是如何动用聚驱后的剩余油,采取微观可视化实验、4层非均质岩心驱替实验、二维平面非均质岩心的驱油实验进行研究,通过结果分析得出二元复合体系可以有效地驱替簇状、柱状剩余油以及附着在岩壁表面的膜状剩余油,并且二元复合体系与油产生超低界面张力,其会动用一部分水驱和聚驱已波及到但无法采出的残余油,进而提高采收率。There will still be a large part of remaining oil in offshore heavy oil fields after polymer flooding.The binary compound system composed of polymer and surfactant is effective in displacing residual oil after polymer flooding.In order to further study on how to develop the residual oil by the binary composite system after polymer flooding, micro visualization experiment, the oil displacement experiment of 4-layer heterogeneous core and 2-dimensional heterogeneous core were carried out. The results showed that the binary composite system could displace the remaining oil in the form of cluster, column and film attached to the rock wall surface. And there was ultra-low interfacial tension between the binary composite system and oil, so the binary composite system could be used to develop some of the residual oil that was affected by water flooding and polymer flooding but was not produced, so the recovery was improved.

关 键 词：微观剩余油 宏观剩余油 驱油机理 聚驱后 二元复合驱 

分 类 号：TE122.12[石油与天然气工程—油气勘探]