渤海油田注聚合物井堵塞物组分分析及相互作用机理  

Component Analysis and Interaction Mechanism of Fouling in Polymer Flooding Well in Bohai Oilfield

作　　者：高尚 刘义刚 兰夕堂 符扬洋 刘长龙 张璐 张丽平 杨红斌[2] GAO Shang;LIU Yigang;LAN Xitang;FU Yangyang;LIU Changlong;ZHANG Lu;ZHANG Liping;YANG Hongbin(Tianjin Branch of CNOOC(China)Co.Ltd,Tianjin 300459,P R of China;School of Petroleum Engineering,China University of Petroleum(East China),Qingdao,Shandong 266580,P R of China)

机构地区：[1]中海石油(中国)有限公司天津分公司,天津300459 [2]中国石油大学(华东)石油工程学院,山东青岛266580

出　　处：《油田化学》2020年第2期340-343,380,共5页Oilfield Chemistry

基　　金：国家自然科学基金“低浓度两亲聚合物驱油体系增效方法及机理研究”(项目编号51774309)。

摘　　要：渤海油田长期注入聚合物(注聚)导致注聚井堵塞,已严重影响了原油开采。为明确渤海油田X注聚井堵塞物组分及各组分的相互作用机理,利用同步热分析仪、扫描电子显微镜、马尔文粒度分析仪、电感耦合等离子质谱分析仪、流变仪等,对堵塞物组分及含量、微观形貌、油田水配伍性、无机垢或原油与聚合物的相互作用进行了研究。结果表明,该堵塞物主要为聚合物与无机垢、原油、黏土颗粒相互包裹形成的,聚合物是堵塞物的主要成分。渤海油田水质配伍性差,地层水、注入水混合易生成无机垢。无机垢晶会包裹聚合物链生长变大,导致聚合物胶束水力学直径增加。聚合物垢被原油包裹后形成难以被地层水溶胀的柔性物质,严重堵塞地层。图6表1参16。The injection of polymer in Bohai oilfield has caused the blockage in injection well,which has seriously affected oil exploitation.In order to clarify the composition of fouling and the interaction mechanism of each component in X injection well in Bohai oilfield,the component,content and microtopography of fouling,water compatibility,interactions between inorganic scale or crude oil and polymer were analyzed by means of synchronous thermal analyzer,SEM,Malvern laser particle size analyzer,inductively coupled plasma mass spectrometer,etc.The results showed that the fouling had a complex structure which was mainly composed of polymer,inorganic scale,crude oil and clay particle.The polymer was the main composition of the fouling.The injected water and formation water of Bohai oilfield was not compatible,which was easy to produce inorganic scale.The inorganic scale crystal would wrap polymer chain and grow,resulting in the increase of hydraulic diameter for the polymer micelle.The polymer scale was wrapped by crude oil to form a flexible material that was difficult to be swollen by formation water,which seriously blocked the formation.

关 键 词：聚合物垢 堵塞 组分 相互作用 渤海油田 

分 类 号：TE358.5[石油与天然气工程—油气田开发工程]