摘要
针对老油区开发后期,在较长时间水驱后出现含水率升高、产油量下降等驱油效率不理想的现状,通过室内研发出高效驱油用表面活性剂组合体系。同时考察不同类型的阴离子表面活性剂、两性表面活性剂和助剂成分对界面张力、动态界面张力、透光率、耐盐性及提高采收率的影响。结果表明:高效驱油用表面活性剂组合体系各组分质量分数为阴离子表面活性剂16%~18%、两性表面活性剂10%~15%、助剂3%~4%、回注水60%~70%;与储层原油之间的界面张力值可以达到10-4mN·m^(-1)数量级,具有良好的界面活性;1.5 h后体系在油水界面分散达到平衡;当矿化度在30 000 mg·L^(-1)时,界面张力均保持在10-3mN·m^(-1)数量级,具有良好抗盐性;在水驱基础上可提高采收率21%以上。
In view of the current situation that the oil displacement efficiency is not ideal,such as the increase of water content and the decrease of oil production after water flooding for a long time in the late development stage of the old oil area,a high-efficiency surfactant combination system for oil displacement was developed in the laboratory.At the same time,the effects of different types of anionic surfactants,amphoteric surfactants and additives on interfacial tension,dynamic interfacial tension,light transmittance,salt resistance and enhanced oil recovery were investigated.The results showed that the mass fraction of each component of the surfactant combination system for high-efficiency oil displacement was determined as follows:anionic surfactant 16%~18%,amphoteric surfactant 10%~15%,additives 3%~4% and reinjection water 60%~70%;The interfacial tension between the surfactant combination system and reservoir crude oil reached the order of 10-4mN·m^(-1),which had good interfacial activity;After 1.5 h,the dispersion of the system at the oil-water interface reached equilibrium;When the salinity was 30 000 mg·L^(-1),the interfacial tension was maintained at the order of 10-3mN·m^(-1),which had good salt resistance;On the basis of water flooding,the oil recovery was improved by more than 21%.
作者
韩英波
周传臣
张婧
HAN Ying-bo;ZHOU Chuan-chen;ZHANG Jing(Dagang Oilfield Bingang Group Bohong Petroleum Technology Co.,Ltd.,Tianjin 300280,China)
出处
《当代化工》
CAS
2022年第11期2588-2591,2597,共5页
Contemporary Chemical Industry
基金
中国石油天然气股份有限公司重大科技专项,大港油区效益增储稳产关键技术研究与应用(项目编号:2018E-11-07)。
关键词
表面活性剂
界面张力
透光率
耐盐性
提高采收率
Surfactant
Interfacial tension
Light transmittance
Salt resistance
Enhanced oil recover
