纳米流体强化驱油机理研究进展

纳米流体强化驱油技术对于降低石油开采成本和提高石油采收率具有十分重要的意义。关于纳米流体强化驱油机理的研究,近年来取得了一系列重要成果。本文重点阐述了关于纳米流体驱油机理的相关基础研究工作,在综合不同学术观点和研究成果的基础上归纳了纳米流体强化驱油的四种机理,据此指出在结构分离压力、岩石润湿性改变和油水界面张力降低的共同作用下使得纳米流体在驱油过程中表现出“卷起”与“扩散”的双重特征,从而具有强化驱油作用。最后指出纳米流体在提高石油采收率领域内将具有非常广阔的应用前景,但是对纳米流体的驱油效果以及影响因素还需进行大量的研究。此外,将纳米流体驱油与泡沫驱油有效结合是一种值得探索的提高石油采收率途径。

Research Progress of Enhancing Oil Recovery Mechanism by Using Nanofluids

Nanofluid flooding is of great significance to reduce the cost of oil development and enhance oil recovery.A series of important results have been achieved about the research on the mechanism of nano-fluid flooding.This paper focuses on the basic research related to the nanofluid flooding mechanism.And the four mechanisms of nanofluid enhanced flooding are summarized based on the different academic opinions and research results.According to this,it is pointed out that under the combined effects of structural separation pressure,rock wetting change and reduced oil-water interfacial tension,the nanofluid exhibits the dual characteristics of“roll-up”and“diffusion”in the process of oil displacement,thus having enhanced oil displacement.Finally,it is pointed out that nanofluids will have a very broad application prospect in the field of enhancing oil recovery,but a lot of research is needed on the effect and influencing factors of nanofluid flooding.In addition,the effective combination of nanofluid flooding and foam flooding is a way to enhance oil recovery.