泡沫驱油核磁共振实验及泡沫动态稳定性评价  

Nuclear magnetic resonance experiments on foam flooding and evaluation of foam dynamic stability

作　　者：张景楠[1,2] 狄勤丰[1,2] 华帅[1,2] 叶峰[1,2] 李原 王文昌 ZHANG Jingnan;DI Qinfeng;HUA Shuai;YE Feng;LI Yuan;WANG Wenchang(Shanghai Institute of Applied Mathematics and Mechanics,Shanghai 200072,China;Shanghai Key Laboratory of Mechanics in Energy Engineering,Shanghai 200072,China)

机构地区：[1]上海大学上海市应用数学和力学研究所,上海200072 [2]上海市力学在能源工程中的应用重点实验室,上海200072

出　　处：《石油勘探与开发》2018年第5期853-860,共8页Petroleum Exploration and Development

基　　金：国家自然科学基金(50874071;51704191);上海市重点学科建设项目(S30106);中国石油科技创新基金(2017D-5007-0209)

摘　　要：将核磁共振技术与传统岩心驱替实验相结合形成一种泡沫驱油核磁共振实验方法,在此基础上建立了评价泡沫在岩心中驱油时动态稳定性的新方法,研究了泡沫体系S-2(主要成分为十二烷基硫酸钠)和S-NP-2(主要成分为十二烷基硫酸钠和二氧化硅纳米颗粒)在直接泡沫驱和水驱后泡沫驱下的驱油特征以及泡沫的动态稳定性。研究表明,通过核磁共振图像和T2(横向弛豫时间)谱可以直观反映泡沫的驱油特征;水驱后进一步使用泡沫体系S-2和S-NP-2驱替后的驱油效率提高幅度分别为18.05%和25.68%,最终驱油效率分别达到63.72%和67.50%,高于直接使用泡沫驱替时的驱油效率;同一泡沫体系在水驱后泡沫驱的方式中比在直接泡沫驱的方式中稳定性更好,相同驱替方式下泡沫体系S-NP-2比泡沫体系S-2更稳定。A visualization experimental method of foam flooding was developed by combining nuclear magnetic resonance(NMR)and traditional core flooding method.On this basis,a new method to evaluate the dynamic stability of foam in the core during displacement process was established.Using this method,the displacement characteristics and dynamic stability of foam of S-2(the main component is sodium lauryl sulfate)and S-NP-2(the main components are sodium lauryl sulfate and silica nanoparticles)in two different displacement modes,i.e.direct foam flooding and foam flooding after water flooding,were studied.The results show that the NMR images and the T2(transverse relaxation time)spectrum reflected the displacement characteristics.The flooding efficiency of S-2 and S-NP-2 after water flooding was increased by 18.05%and 25.68%and reached 63.72%and 67.50%respectively at last,higher than direct foam flooding.The same foam system had better stability in foam flooding after water flooding than in direct foam flooding,and foam S-NP-2 is more stable than foam S-2 under the same displacement mode.

关 键 词：泡沫驱 驱替实验 驱油效率 核磁共振 泡沫稳定性 评价方法 

分 类 号：TE357.46[石油与天然气工程—油气田开发工程]