自乳化表面活性剂体系的制备和驱油效果研究  

Preparation and oil displacement efficiency of self-emulsifying surfactant flooding system

作　　者：元福卿 YUAN Fu-qing(Exploration and Development Research Institute of Shengli Oilfield Company,SINOPEC,Dongying 257000,China)

机构地区：[1]中国石油化工有限公司胜利油田分公司勘探开发研究院,山东东营257000

出　　处：《应用化工》2022年第9期2570-2574,共5页Applied Chemical Industry

基　　金：国家科技重大专项资助项目(2016ZX05011-003)。

摘　　要：通过两性表面活性剂GA-13与不同类型表面活性剂复配,研制了适用于高温高盐油藏的自乳化表面活性剂体系,测试了该体系的乳化与增黏能力,并通过岩心驱油实验考察了自乳化体系的驱油效果。结果表明,当表面活性剂GA-13与S-12复配时,在80℃及矿化度44592 mg/L条件下,施加轻微界面扰动,即可实现自乳化,形成的乳液粒径分布为10~15μm,乳化增黏率为361.29%,乳化及增黏效果最好。0.5%GA-13+0.2%S-12自乳化驱油体系具有良好的提高采收率效果,在渗透率160 mD条件下,注入0.5 PV,可提高采收率20%。该自乳化表面活性剂驱油体系不仅可以通过乳化作用提高洗油效率,还由于乳化增黏作用降低了驱替相的流速,起到了调剖的作用,扩大了波及体积,因而具有较好的驱油效果。The self-emulsifying surfactant system suitable for high temperature and high salinity reservoirs was developed by mixing zwitterionic surfactant GA-13 and different types of surfactants.The emulsifying and viscosifying increasing abilities of different complex systems have been tested.The oil displacement efficiency of the self-emulsifying surfactant flooding system was also investigated.The result showed that the emulsifying and viscosifying increasing abilities of GA-13 and S-12 mixed system is the best.Self-emulsifying can be achieved by applying slight interfacial disturbance at 80℃and salinity 44592 mg/L,and the emulsion size distribution is 10~15μm with a 361.29%viscosity increasing rate.0.5%GA-13 and 0.2%S-12 self-emulsifying surfactant flooding system shows good oil displacement efficiency,and the oil recovery efficiency is 20%at the core permeability of 160 mD and the injection volume of 0.5 PV.The self-emulsifying surfactant flooding system can not only enhance the oil displacement efficiency through emulsification,but also reduce the flow rate of displacement phase by emulsifying viscosity,which plays the role of profile control and expands sweep volume.Therefore,product has good oil displacement performance.

关 键 词：自乳化表面活性剂驱 乳化增黏率 驱油性能 

分 类 号：TQ423[化学工程] TE357.46[石油与天然气工程—油气田开发工程]