摘要
以渤海油田两种典型的水溶性稠油降黏剂为对象,包括小分子表面活性剂SR和高分子ZK,通过填砂管驱替实验,研究了温度、盐度和渗透率对于它们驱油性能的影响。结果表明:在相同条件下,ZK的驱油效果优于SR;温度升高、盐度升高和渗透率降低不利于两种降黏剂驱油效果的提升。通过界面张力测试、降黏性能测定、溶液表观黏度测定、微观可视化驱替实验,探讨了温度和渗透率影响降黏剂驱油效果的原因。结果表明:温度升高促使体系界面张力升高、降黏性能下降、溶液表观黏度降低,不利于降黏剂提升洗油效果和扩大波及范围。微观驱替实验结果表明,ZK在不同渗透率下均具有更好的波及效果;在低渗条件下,形成的乳状液滴尺寸小,不利于调整吸水剖面。
The effect of temperature,salinity and permeability on the oil displacement properties of two heavy oil viscosity reducing agents was studied through sand-filled pipe flooding experiments.These two chemicals are typical water-soluble agents in Bohai oilfield,including the small molecule surfactant SR and polymer ZK.The results indicated that,under the same condition,the oil displacement property of ZK was better than that of SR,and the increase of temperature and salinity as well as the decrease of permeability were not conducive to the improvement of oil displacement performances for both two agents.The reasons for the effect of temperature and permeability on the oil displacement property were analyzed by interfacial tension test,heavy oil viscosity reduction analysis,apparent viscosity measurement and microscopic displacement experiment.The results showed that the increase of temperature promoted the increase of interfacial tension,the decrease of heavy oil viscosity reduction,and the decrease of the apparent viscosity of ZK solution,which was not good for agents to enhance the oil displacement and sweep properties.The results of microscopic displacement experiments indicated that ZK had better sweep efficiency under both two investigated permeabilities,and in low permeability model,the size of emulsion droplets was small,which was bad for adjusting the water absorption profile.
作者
邹剑
王弘宇
王秋霞
张华
韩晓冬
米恒坤
ZOU Jian;WANG Hong-yu;WANG Qiu-xia;ZHANG Hua;HAN Xiao-dong;MI Heng-kun(Bohai Oilfield Research Institute,Tianjin Branch,CNOOC China Limited,Tianjin 300459,China;School of Petroleum Engineering,China University of Petroleum(East China),Qingdao Shandong 266580,China)
出处
《当代化工》
CAS
2020年第7期1341-1346,共6页
Contemporary Chemical Industry
基金
中海石油(中国)有限公司重大项目,“渤海油田3000万吨持续稳产关键技术研究”课题四“稠油规模化热采有效开发技术”(项目编号:CNOOC-KJ135ZDXM36TJ04TJ)
关键词
稠油降黏
乳化
采收率
两亲聚合物
耐温抗盐
Heavy oil viscosity reduction
Emulsification
Oil recovery
Amphiphilic polymer
Salt and temperature resistance
