纳米Al_(2)O_(3)渗吸驱油剂的性能评价  

Study on oil recovery effect of Al_(2)O_(3) nanoparticle imbibition

作　　者：杨昌华 张永伟 魏军红 王绘鹏 王辰 梁拓 阿里 YANG Changhua;ZHANG Yongwei;WEI Junhong;WANG Huipeng;WANG Chen;LIANG Tuo;A Li(School of Petroleum Engineering,Xi’an Shiyou University,Xi’an 710065,China;Engineering Research Center for Development and Management of Low-Permeability and Ultra-Low Permeability Reservoirs in Western China,Ministry of Education,Xi’an 710065,China;No.9 Oil Production Plant,Changqing Oilfield Company,CNPC,Yinchuan 750000,China;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]西部低渗-特低渗油藏开发与治理教育部工程研究中心,陕西西安710065 [3]中国石油天然气集团有限公司长庆油田分公司第九采油厂,宁夏银川750000 [4]中国石油大学(北京),北京102249

出　　处：《应用化工》2024年第10期2277-2283,共7页Applied Chemical Industry

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

摘　　要：低渗致密油藏储层基质渗透率低、孔喉小,常规提高采收率方法难以有效驱替出低渗透储层中的原油。选用表面活性剂与纳米Al_(2)O_(3)颗粒合成一种纳米渗吸驱油剂,通过对其进行稳定性优化、界面张力和润湿性静态评价,开展岩心渗吸和驱替实验,研究纳米驱油剂在低渗透岩心中渗吸和驱油效果。结果显示,纳米Al_(2)O_(3)渗吸驱油剂能够改变岩石壁面润湿性,润湿角改变程度可达57.5%;有效降低界面张力,使其下降至70%;对于低渗透岩心具有较好的渗吸采收效果,60℃条件下渗吸采收效果可达37%;驱替实验中,纳米驱油剂提高采收率可达16%。Due to the low permeability and small pore throat of low permeability tight reservoirs,conventional enhanced oil recovery methods are difficult to effectively displace crude oil from low permeability reservoirs.A nano-imbibition displacement agent was synthesized by using surfactant and nano-Al_(2)O_(3)particles,and core imbibition and displacement experiments were carried out by optimizing its stability,static evaluation of interfacial tension and wettability,so as to study the imbibition and displacement effect of nano-oil displacement agent in low-permeability core.The results show that the wettability of rock wall can be changed by nano-Al_(2)O_(3)imbibition displacement agent,and the wettability angle can be changed by 57.5%.Effectively reduce the interfacial tension,reducing it to 70%;for low permeability core,it has good imbibition recovery effect,and the imbibition recovery effect can reach 37%at 60℃.In the displacement experiment,the oil recovery rate increased by 16%with the nano displacement agent.

关 键 词：低渗致密油藏 纳米Al_(2)O_(3)复配体系 润湿性 渗吸效果 提高采收率 

分 类 号：TQ31[化学工程—高聚物工业] TQ031.2