页岩气及其吸附与扩散的研究进展

随着当前能源消费的迅速增加,常规天然气资源短缺,很难满足日益增长的能源需求。页岩气作为一种非常规天然气,具有资源潜力大和低碳排放等优点,加之美国和加拿大成功实现商业化开采,因此页岩气资源勘探开发近年来备受世界瞩目。中国作为重要的页岩气开采国家,近几年发展势头良好,部分页岩气田也已经实现商业化生产。由于页岩的致密和低渗特性,导致页岩气的开采难度较大。页岩的孔隙结构和气体吸附扩散研究,对于气藏产能的评估及其高效开采有至关重要的作用。本文介绍了国内外页岩气勘探开发现状以及页岩的孔隙结构,综述了储层中页岩气吸附、扩散与渗流的研究进展,总结了分子模拟方法在页岩气研究中的应用,并对页岩气相关研究的前景进行了展望。

Progress in adsorption and diffusion of shale gas

With the rapid increase of global energy consumption, the conventional natural gas resource is in shortage and difficult to meet the increasing demands. As a kind of unconventional gas, shale gas has a potential wealth of natural resources and the advantage of low carbon emission. With the commercial exploitation in America and Canada, shale gas has been drawing more and more attention. However, due to the tightness and low permeability of shale, shale gas is extremely difficult to produce. Therefore, understanding pore structure of shale as well as gas adsorption and diffusion is of great importance for the resource assessment and effective exploitation. In this review, domestic and overseas development progress of shale gas resource has been outlined, and the pore structures as well as the features of the shales are elaborated. The progress in molecular simulation of adsorption and diffusion of shale gas is summarized, and the perspective for shale gas is also provided.