Z1型聚合物微球的油藏适应性及调驱效果  

Reservoir adaptability and control flooding effect of Z1-type polymer microspheres

作　　者：刘进祥 代磊阳[1,3] 李先杰 张晓冉[1,3] 卢祥国 王斌杰 Liu Jinxiang;Dai Leiyang;Li Xianjie;Zhang Xiaoran;Lu Xiangguo;Wang Binjie(State Key Laboratory of Offshore Oil Exploitation,Beijing 100028,China;Key Laboratory of Enhanced Oil and Gas Recovery in Ministry of Education,Northeast Petroleum University,Daqing Heilongjiang 163318,China;Bohai Oil Research Institute of Tianjin Branch,CNOOC(China)Co.,Ltd.,Tianjin 300450,China;CNOOC Research Institute Co.,Ltd.,Beijing 100028,China)

机构地区：[1]海洋石油高效开发国家重点实验室,北京100028 [2]东北石油大学提高油气采收率教育部重点实验室,黑龙江大庆163318 [3]中海石油(中国)有限公司天津分公司渤海石油研究院,天津300450 [4]中海油研究总院有限责任公司,北京100028

出　　处：《石油化工》2020年第12期1194-1200,共7页Petrochemical Technology

基　　金：第四批“海洋石油高效开发国家重点实验室开放基金课题”资助项目(CCL2018RCPS0029RON)。

摘　　要：为满足渤海油田深部液流转向技术需求,利用生物显微镜以及岩心驱替实验研究了Z1型聚合物微球在磨口瓶和多孔介质中的膨胀性能以及注入性能,并开展了微球液流转向效果实验研究。实验结果表明,在渤海Q油藏环境下,磨口瓶中微球水化缓膨192 h后粒径从3.80μm增长到28.02μm,粒径膨胀了6.37倍,表现出良好缓膨效果。微球具有良好注入性的极限渗透率为200×10^-3μm^2,岩心渗透率(K)在(200~1 400)×10^-3μm^2范围内微球缓膨后具有良好封堵效果,封堵率(β)大于50%。随K增加,β呈现"先增后减"变化趋势,极限渗透率时β最大,高于79%。随微球注入浓度的增加,阻力系数、残余阻力系数和β逐渐增加,采收率增幅也逐渐增大。In order to meet the technical requirements of deep liquid flow steering in Bohai oilfield,the expansion and injection performance of Z1-type polymer microspheres in flasks and porous media was studied by using biomicroscopy and core displacement experiments,and the experimental research on the liquid flow steering effect of microspheres was carried out.The results show that in the Bohai Q reservoir environment,the particle size of the microsphere in the flasks increases from 3.80μm to 28.02μm after 192 h,and the particle size expands 6.37 times,showing a good effect.The limit permeability of microspheres with good injectivity is 200×10^-3μm^ 2,and the plugging effect is good when the microspheres expand slowly within the range of(200-1400)×10^-3μm ^2,and the plugging rate is more than 50%.With the increase of permeability,the plugging rate of microsphere shows a trend of“increase first and then decrease”,and the plugging rate is the largest at the limit permeability,which is greater than 79%.With the increase of microsphere injection concentration,the resistance coefficient,residual resistance coefficient,plugging rate and recovery rate increase gradually.

关 键 词：聚合物微球 粒径及分布 极限渗透率 微球粒径 喉道直径 机理分析 端面效应 

分 类 号：TE341[石油与天然气工程—油气田开发工程]