核磁共振研究聚合物微球调驱微观渗流机理  

Experimental study on microscopic percolation mechanism of polymer microsphere profile control and flooding by nuclear magnetic resonance

作　　者：周元龙[1] 姜汉桥[1] 王川[1] 桑国强[2] 刘磊 

机构地区：[1]中国石油大学石油工程教育部重点实验室,北京102249 [2]中石油勘探开发研究院,北京100083 [3]冀东油田陆上作业区采油六区,河北唐山063200

出　　处：《西安石油大学学报（自然科学版）》2013年第1期70-75,2,共6页Journal of Xi’an Shiyou University（Natural Science Edition）

基　　金：国家科技重大专项外协子课题"海上稠油化学驱油技术"(编号:2011ZX05024-004)

摘　　要：利用核磁共振研究聚合物微球调驱渗流机理,设计了不同粒径微球的注入实验,从微观角度分析了聚合物微球的驱油效果与驱油机理.对驱替后岩心不同直径孔隙内的流体分布进行了研究,得到了水驱、聚合物微球驱、后续水驱阶段驱出油的孔径范围以及剩余油分布.实验结果表明,聚合物微球调驱能够有效动用岩心中不同孔径中剩余油.不同尺寸聚合物微球对岩心的适应性不同,微米级微球主要适用于高渗岩心,纳米级微球主要适用于低渗岩心.The profile control and flooding experiments of polymer microsphere of different grain size are carried out using the artificial cores with different permeability,and the displacement results and displacement mechanisms are studied by NMR.Fluid distributions in the core pores of different size ranges after water flooding,polymer microsphere flooding and subsequent water flooding are analyzed by NMR spectroscopy,and the recovery rates of the core pores of different size ranges after water flooding,polymer microsphere flooding and subsequent water flooding are obtained.It is shown that the remaining oil in the pores of different size ranges can be driven out by polymer microsphere profile control and flooding,but the polymer microsphere of different size is suitable to the cores of different permeability.The microsphere of micrometer size is suitable to high permeability cores,and the microsphere of nanometer size is suitable to low permeability cores.

关 键 词：聚合物微球调驱 渗流机理 核磁共振 

分 类 号：TE357.46[石油与天然气工程—油气田开发工程]