油气地质与采收率2025，Vol.32Issue(3)：154-166,13.DOI:10.13673/j.pgre.202310033
驱油剂乳化能力定量表征新方法
New method for quantitatively characterizing emulsifying ability of oil displacement agents
摘要
Abstract
The emulsifying ability of oil displacement agents plays a crucial role in the chemical flooding process,but the quantita-tive characterization of emulsifying ability remains unsolved.In response to this challenge,this paper presented a new method for quantitatively characterizing the emulsifying ability through emulsification of oil displacement agent-crude oil systems induced by rotating fluid.The method determined the experimental parameters(emulsification coefficient)characterizing the emulsifying ability of oil displacement agents by plotting the dynamic curve of emulsification oil rate at different rotational speeds.The emulsification coefficient fully characterized the initial rotational speed of emulsification,initial emulsification oil rate,and emulsification speed of oil displacement agents with crude oil and accurately distinguished and compared the differences in emulsifying ability caused by changes in the mass fraction of the oil displacement agent,type of oil displacement agent,and properties of the crude oil.By comparing the emulsification coefficients,it was found that AEO9 had the highest emulsification coefficient(1.184),while SDS had the lowest emulsification coefficient(0.320).The emulsifying ability of the oil displacement agents for CQ crude oil in descending order was as follows:AEO9＞SDBS＞SCS＞Na2CO3＞AEO5＞SDS.As the mass fraction of the oil displacement agent increased,the emulsification coefficient increased,indicating an enhanced emulsifying ability.The emulsifying ability of the oil displacement agents was also influenced by the properties of the crude oil.Due to the higher content of active components in SL crude oil,the emulsifying ability of the oil displacement agents is greater for SL crude oil than for CQ crude oil.In addition,the results of co-injection experiments involving surfactants and crude oil in porous media,as well as surfactant flooding experiments,indicate that oil displacement agents with higher emulsification coefficients exhibit stronger in-situ emulsifying ability in porous media.Therefore,using the emulsification coefficient as a parameter to characterize and evaluate the emulsifying ability of oil displacement agents is reasonable.关键词
提高采收率/化学驱/乳化/驱油剂/乳化能力/乳化系数Key words
enhanced oil recovery/chemical flooding/emulsification/oil displacement agent/emulsifying ability/emulsification coefficient分类
能源科技引用本文复制引用
邹积瑞,岳湘安,李晓骁,邵明鲁,杨志国,安维青..驱油剂乳化能力定量表征新方法[J].油气地质与采收率,2025,32(3):154-166,13.基金项目
国家自然科学基金青年基金项目"微观非均质残余油就地乳化驱动机理和方法"(52204056),中国石油大学(北京)科研基金项目"低渗油藏CO2-化学剂复合吞吐提高采收率机理研究"(2462024YJRC003),江苏省自然科学青年基金项目"超分子自组装油藏调剖体系的构建与自适应封堵机制"(BK20220622). （52204056）
