超高分子量缔合聚合物溶液的流变特征及微观结构研究  

Rheological character and the microstructure research on ultra-high molecular weight associating polymer solution

作　　者：郭兰磊[1,2] 

机构地区：[1]中国石油大学,北京102249 [2]中石化胜利油田分公司地质科学研究院,山东东营257015

出　　处：《石油钻采工艺》2013年第5期97-99,110,共4页Oil Drilling & Production Technology

基　　金：国家科技重大专项"胜利油田特高含水期提高采收率技术"(编号:2011ZX05011)

摘　　要：超高分子量缔合聚合物比普通缔合聚合物具有更高的分子量和更小的缔合度,因此具有不同的增黏性、黏弹性和微观结构。选择了相对分子量500万的普通缔合聚合物和相对分子量1 900万的超高分子量缔合聚合物溶液,通过渗流黏度测试装置和安东帕流变仪对其进行了渗流黏度、黏弹性测试。结果表明,超高分子量缔合聚合物通过自身的高分子量和分子链间相互缔合的协同作用,在多孔介质渗流中能形成更高的渗流黏度,在稳态剪切条件下具有更高的威森伯格数;通过冷冻蚀刻扫描电镜对超高分子量缔合聚合物溶液的微观结构观测表明,相对于普通缔合聚合物,超高分子量缔合聚合物溶液链与链间能形成更加紧密的网状结构;驱油实验研究表明,超高分子量缔合聚合物具有比普通缔合聚合物更好的驱油性能。Compared with the common associating polymer, ultra high molecular weight association polymer is qualiifed with high-er molecular weight and less association degree. So it has different viscosifying performance, viscoelasticility and microstructure. So a kind of common associating polymer with molecular weight 5 million and a kind of ultra high molecular weight associating polymer with molecular weight 19 million were chosen, through lfow viscosity test device and Antonpar rheometer, the lfow viscosity and viscoelastic behavior of the two kinds of polymer solution were tested. The results show that by the cooperative action of higher molecular weight itself and some degree of associating action between molecular chains, the ultra high molecular weight associating polymer could form higher lfow viscosity during porous media seepage, and is qualiifed with higher Wiesenberger number under the steady shear conditions. Through the microstructure research with freeze-fracture scanning electron microscope, it shows that the ultra high molecular weight associating polymer has tighter network structure between chains. Finally the oil displacement result shows that compared with common associating polymer, it can enhance oil recovery effectively.

关 键 词：超高分子量 缔合聚合物 微观结构 黏弹性 威森伯格数 冷冻蚀刻扫描电镜 

分 类 号：TE357.4[石油与天然气工程—油气田开发工程]