纳米SiO_(2)/十二烷基硫酸钠复配体系的渗吸采油效果  

Research on imbibition oil recovery effect of nano-SiO_(2)/sodium dodecyl sulfate composite system

作　　者：杨昌华 王辰 曲世元 范春林 张永伟 阿里 YANG Changhua;WANG Chen;QU Shiyuan;FAN Chunlin;ZHANG Yongwei;A Li(School of Petroleum Engineering,Xi'an Shiyou University,Xi'an 710065,China;CNPC Engineering Technology Research Institute,Beijing 102200,China;Changqing Oilfield 4th Oil Production Plant,Yulin 719000,China;College of Petroleum Engineering,China University of Petroleum(Beijing),Beijing 102249,China)

机构地区：[1]西安石油大学石油工程学院,陕西西安710065 [2]中国石油集团工程技术研究院有限公司,北京102200 [3]长庆油田第四采油厂,陕西榆林719000 [4]中国石油大学(北京)石油工程学院,北京102249

出　　处：《石油化工》2024年第11期1625-1630,共6页Petrochemical Technology

基　　金：中国博士后科学基金项目(2023MD733257);国家资助博士后研究人员计划资助项目(GZC20232142);陕西省博士后科研资助项目(2023BSHTBZZ45)。

摘　　要：优选纳米SiO_(2)/十二烷基硫酸钠(SDS)复配体系,利用SEM、粒径分析、接触角测量、界面张力测试等方法对该复配体系进行评价,并开展了岩心渗吸实验,考察了SiO_(2)/SDS复配体系的润湿性及渗透采收率的影响因素,并评价了界面张力性能。实验结果表明,SiO_(2)/SDS能够改变岩石壁面润湿性,润湿角改变程度可达52.2%;纳米SiO_(2)含量为1000 mg/L时可有效降低界面张力;对于低渗岩心具有提高渗吸采收率效果,最高渗吸采收率可达35%,矿化度会降低渗吸效果;提高温度或纳米SiO_(2)含量,渗吸采收率相应提高。The composite system of nano-SiO_(2)and sodium dodecyl sulfate(SDS)was selected optimally and evaluated by SEM,particle size analysis,contact angle measurement and interfacial tension test.The core imbibition experiment was carried out.The influence factor of wettability and imbibition recovery was considered,and the interfacial tension was evaluated.The results show that nano-SiO_(2)/SDS composite system can change the wettability of rock wall,and the change of wettability angle can be 52.2%.The interfacial tension can be reduced when the concentration of nanoparticles is 1000 mg/L.For low permeability core,the composite system can improve the highest imbibition recovery ratio,which can reach 35%,and the mineralization can reduce imbibition recovery ratio.The imbibition recovery ratio would be improved by enhancing the temperature or the content of nano-SiO_(2).

关 键 词：低渗致密油藏 纳米SiO_(2)复配体系 润湿性 界面张力 提高采收率 

分 类 号：TE65[石油与天然气工程—油气加工工程]