油田用纳米驱油剂提高采收率的机理与影响因素

Mechanism and Influence Factors of Nano-scale Oil Displacement Agents for Enhanced Oil Recovery in Oil Fields

纳米颗粒在油藏工程和提高采收率等领域有着广泛的应用。纳米技术为提高旧油田和边缘油田的石油采收率(EOR)提供了新的思路和方法。储层工程和EOR领域已经应用了纳米颗粒。纳米颗粒的尺寸较小,可以很容易地进入多孔岩石,而不会对渗透率产生严重影响。纳米粒子通过改善注入流体的性质和流体-岩石相互作用的性质,来大幅度提高采收率。纳米颗粒在提高采油率方面的应用可以归纳为3种方法,即纳米催化剂、纳米乳液和纳米流体。本文主要介绍了纳米驱油剂在采油方面的机理,以及影响采收率提高的主要因素。

Nanoparticles had a wide range of applications in reservoir engineering and enhanced oil recovery.Nanotechnology provided new methods and ideas for improving oil recovery(EOR)technology in old and marginal fields.The fields of reservoir engineering and EOR was applied the developed nanoparticles in a number of fields.The use of nanoparticles for enhanced recovery meaned that the size of the nanoparticles was smaller than the size of the pore throat,and could easily enter porous rocks without seriously affecting the permeability.Nanoparticles could greatly improve the recovery factor by improving the properties of the injected fluid and the fluid-rock interaction.The application of nanoparticles in improving oil recovery was summarized into three methods:namely nanocatalyst,nanoemulsion and nanofluid.The article mainly introduced the mechanism of nano-flooding agents in oil recovery and the main factors that affected the enhancement of oil recovery.