低渗透油田深度调剖技术化学研究与应用评价  

Chemical Research and Application Evaluation of Deep Profile Control Technology in Low Permeability Oilfields

作　　者：马江波 李二冬 陈塞锋 李刚[1] 李欣欣 Ma Jiang-bo;LI Er-dong;CHEN Sai-feng;LI Gang;LI Xin-xin(Xingzichuan Oil Production Plant of Yanchang Oilfield Co.,Ltd.,Yan'an Shaanxi 717400,China;Xi'an Shiyou University,Xi'an Shaanxi 710065,China)

机构地区：[1]延长油田股份有限公司杏子川采油厂,陕西延安717400 [2]西安石油大学,陕西西安710065

出　　处：《当代化工》2023年第12期2955-2958,共4页Contemporary Chemical Industry

基　　金：国家自然科学基金面上项目,离子水驱砂岩油藏固/液体系界面调控及残余油启动机制研究(项目编号:52174027)。

摘　　要：以聚丙烯酰胺类聚合物为研究对象,在室内进行了纳米微球水化膨胀实验和选择性封堵实验,分析了不同注入参数时纳米微球的封堵特性,明确了低渗透油藏纳米微球深度调剖封堵界限。结合现场实际应用,开展了矿场微球调驱动态分析和效果评价研究。结果表明:纳米微球水化特性与地层温度和矿化度密切相关;微球粒径与孔喉直径比值为0.5时纳米微球的封堵效果最佳。深度调剖应用结果,显示800 nm的微球封堵率最佳,可实现井组增油532 t、降水88.56%的效用。Taking polyacrylamide polymer as the research object,the hydration expansion experiment and selective plugging experiment of nano-microspheres were carried out in the laboratory,and the plugging characteristics of nano-microspheres under different injection parameters were analyzed,and the deep profile control and plugging limit of nano-microspheres in low permeability reservoirs was defined.Based on on-site practical applications,dynamic analysis and effectiveness evaluation of microsphere flooding were conducted.The results indicated that the hydration characteristics of nanospheres were closely related to the formation temperature and mineralization degree;The best sealing effect of nanospheres was achieved when the ratio of microsphere particle size to pore throat diameter was 0.5.The application results of deep profile control showed that the 800 nm microsphere had the best sealing rate,which could achieve the effect of increasing oil production by 532 t and reducing water cut by 88.56%in the well group.

关 键 词：聚合物 低渗透油田 封堵实验 水化 深度调剖 

分 类 号：TE357[石油与天然气工程—油气田开发工程]