摘要
泡沫驱技术具有优异的驱油机制而被广泛应用于各类油藏的开采过程中,但是大多数的油藏环境具有高温、高矿化度和低渗透率等储层特征,会对泡沫的稳定性产生不利的影响。泡沫的稳定性是决定泡沫驱油效率的关键因素。纳米颗粒具有特殊的表面效应、界面效应和小尺寸效应,可作为稳泡剂增强泡沫的稳定性,进而改善泡沫在孔隙介质中的驱油效果。本文介绍了纳米颗粒稳定泡沫的机理:改善泡沫液膜性质、减缓泡沫歧化速度和形成致密稳定结构,分析了纳米颗粒浓度、纳米颗粒润湿性、纳米颗粒尺寸、温度、含油饱和度和矿化度对纳米颗粒稳定泡沫的影响,总结了纳米颗粒稳定泡沫的驱油机理:增大泡沫与原油的相互作用力、改善泡沫的封堵特性和改变油藏润湿性,提出了纳米颗粒稳定泡沫研究的发展方向。
Foam flooding technology had been widely used in the exploitation process of various reservoirs due to its excellent oil displacement mechanism.However,most reservoir environments were characterized by high temperature,high salinity and low permeability,which had adverse effects on foam stability.The stability of foam was the key factor to determine the foam flooding efficiency.Nanoparticles had special surface effect,interface effect and small-size effect,which could be used as a foam stabilizer to enhance the stability of foam,thereby improving the oil displacement effect of the foam in porous medium.This paper introduced the mechanisms of nanoparticles-stabilized foam including improving the property of foam liquid film,slowing down the rate of foam disproportionation and forming compact and stable structure.And the influences of nanoparticle concentration,nanoparticle wettability,nanoparticle size,temperature,oil saturation and salinity on the stability of nanoparticles-stabilized foam were analyzed.The oil displacement mechanisms of nanoparticles-stabilized foam including increasing the interaction between foam and oil,improving foam plugging characteristics and changing reservoir wettability were summarized.Finally the research development direction of nanoparticles-stabilized foam was proposed.
作者
刘珑
范洪富
孙江河
陈海汇
赵娟
LIU Long;FAN Hongfu;SUN Jianghe;CHEN Haihui;ZHAO Juan(School of Energy Resources,China University of Geosciences(Beijing),Beijing 100083,P R of China)
出处
《油田化学》
CAS
CSCD
北大核心
2019年第4期748-754,共7页
Oilfield Chemistry
关键词
纳米颗粒
泡沫驱
稳定性
驱油机理
综述
nanoparticle
foam flooding
stability
displacement mechanism
review
