孔喉尺度弹性微球的深部调驱性能  

Deep Profile Control and Flooding Performance of Throat-scale Elastic Microspheres

作　　者：姚传进[1] 李蕾[1] 雷光伦[1] 高雪梅[1] 

机构地区：[1]中国石油大学(华东)石油工程学院,山东青岛266580

出　　处：《西南石油大学学报（自然科学版）》2013年第4期114-120,共7页Journal of Southwest Petroleum University(Science & Technology Edition)

基　　金：中央高校基本科研业务费专项资金资助(11CX06025A);中国石油大学(华东)研究生创新基金资助项目(CXZD11-04)

摘　　要：针对油田注水开发存在的问题及弹性微球调驱应用现状,利用激光粒度分析仪分析了弹性微球的粒径分布;利用填砂管岩芯(单管、长管、非均质双管、非均质三管)驱替实验,研究了弹性微球的封堵特性、运移能力、分流特性、驱油性能及聚驱后的深部调驱性能。结果表明,弹性微球粒径具有单峰分布特征,服从威布尔分布;弹性微球可在岩芯中不断运移和封堵,具有良好的深部调驱性能;弹性微球可选择性封堵高渗层,用于非均质岩芯调驱分别提高采收率16.11%(低渗管)、11.28%(中渗管)和5.02%(高渗管),说明弹性微球可改善中低渗层及高渗层中低渗区的波及状况和驱替效果,有效提高采收率;聚驱后弹性微球调驱比单一聚驱提高采收率5.73%,具有良好的聚驱后深部调驱效果。According to the problems of water flooding and the application status of elastic microspheres profile control and flooding, the particle size distribution of elastic microspheres was analyzed using laser particle size analyzer; using sandpack core （single tube sandpack, long sandpack, heterogeneous two-tube sandpacks, heterogeneous three-tube sandpacks） displace- ment experiments, the plugging property, migration capacity, diversion property, oil displacing performance and deep profile control and flooding property after polymer flooding of elastic microspheres were studied. The results show that the particle size of elastic microspheres bears a typical single-peak distribution character obeying Weibull Distribution; elastic microspheres can migrate and plug in sandpacks gradually, which indicate that elastic microspheres have deep displacement performance; elastic microspheres can plug high permeability layer selectively which can be applied to heterogeneous sandpacks, with the enhanced oil recovery 16.11% （low permeability tube）, 11.28% （middle penlleability tube） and 5.02% （high permeability tube） respec- tively. This indicates that elastic microspheres can improve the middle and low permeability oil layers as well as middle and low permeability areas of high permeability layers selectively and thus enhance oil recovery effectively; elastic microspheres profile control and flooding after polymer flooding can enhance oil recovery by 5.73% more than single polymer flooding which indicates that elastic microspheres have better deep profile control and flooding efficiency after polymer flooding.

关 键 词：孔喉尺度弹性微球 粒径分布 封堵特性 分流特性 深部调驱 提高采收率 

分 类 号：TE357[石油与天然气工程—油气田开发工程]