高分子量缔合聚合物与聚丙烯酰胺岩心剪切稳定性对比  

Comparative cores shear stability of the high molecular weight associative polymers and polyacrylamide

作　　者：杨涛[1] 郭拥军[2,3] 胡俊 庄永涛 梁严 Yang Tao;Guo Yongjun;Hu Jun;Zhuang Yongtao;Liang Yan(Petroleum Engineering School,Southwest Petroleum University,Chengdu Sichuan 610500,China;State Key Laboratory of Oil and Gas Reservoir Geology and Exploitation,Southwest Petroleum University,Chengdu Sichuan 610500,China;Sichuan Guangya Polymer Chemical Co.,Ltd.,Chengdu Sichuan 610500,China;Engineering Technology Department of PetroChina Dagang Oilfield Company,Tianjin 300280,China;College of Chemistry and Chemical Engineering,Southwest Petroleum University,Chengdu Sichuan 610500,China)

机构地区：[1]西南石油大学石油与天然气工程学院,四川成都610500 [2]西南石油大学油气藏地质及开发工程国家重点实验室,四川成都610500 [3]四川光亚聚合物化工有限公司,四川成都610500 [4]中国石油大港油田公司工程技术处,天津300280 [5]西南石油大学化学化工学院,四川成都610500

出　　处：《石油化工》2020年第10期980-984,共5页Petrochemical Technology

基　　金：国家科技重大专项子课题(2016ZX05025003-011)。

摘　　要：研究了高分子量缔合聚合物(HAWSP)和聚丙烯酰胺(HPAM)溶液的岩心剪切黏度及分子量稳定性,考察了注入速度、剪切次数及岩心渗透率对剪切稳定性的影响。实验结果表明,随着注入速度的增加,HAWSP聚合物溶液剪切后黏度呈"先平稳后下降"的两段式特征,而HPAM溶液剪切后黏度则单调下降;HAWSP聚合物经一次剪切后黏度及分子量即趋于稳定,而HPAM则需多次岩心剪切后才趋于稳定;高速岩心剪切时聚合物分子量保留率与岩心渗透率大小密切有关,渗透率越高,分子量保留率越大;在渗透率和注入速度相同时,HAWSP表现出更好的剪切稳定性。The shear viscosity and molecular weight stability of high molecular weight associative polymer and polyacrylamide solutions were compared and studied.The effects of injection speed,repeated shearing times,and core permeability on shear stability was investigated.The result shows that as the injection speed increases,the viscosity of the associative polymer solution after shearing presents a two-stage characteristic of"stabilizing first and then decreasing",while the viscosity of the polyacrylamide solution decreases monotonically after shearing.The viscosity and molecular weight of the associative polymer tends to stabilize after one shear,while polyacrylamide tends to stabilize after multiple core shears.The polymer molecular weight retention is closely related to the core permeability during high-speed core shearing.The higher the permeability,the greater the molecular weight retention.When the permeability and injection speed is the same,the associative polymer showed better shear stability.

关 键 词：聚合物驱 剪切稳定性 注入速度 剪切次数 渗透率 黏度 

分 类 号：TQ317.3[化学工程—高聚物工业]