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页岩气是储集于页岩中的天然气,是一种有发展潜力的重要非常规天然气资源。随着页岩气勘探开发研究的逐步深入,研究者发现页岩纳米孔隙结构研究直接关系到页岩的气体储集能力和渗流特性。因此,页岩纳米孔隙研究成为页岩气储层评价和运移研究的热点问题。然而,页岩纳米孔隙结构表征方法并不成熟,还不能全面有效地描述页岩纳米孔隙具体特征,这成为制约页岩纳米孔隙研究的瓶颈。本文综述了页岩纳米孔隙结构物性研究中取得的一些有价值的新认识。在此基础上提出页岩孔隙结构表征分析方法发展的必要性。进一步逐一介绍了常见的页岩纳米孔隙表征分析方法的基本原理和研究进展。
Shale gas is natural gas stored in shale and is an important unconventional natural gas resource with potential for development. With the deepening of research on shale gas exploration and development, the researchers found that the study of shale nano-pore structure is directly related to the gas storage capacity and seepage characteristics of shale. Therefore, the study of shale nanopores has become a hot issue in the research of shale gas reservoir evaluation and migration. However, the characterization of shale nano-pore structure is not mature, and the specific characteristics of shale nano-pore can not be fully and effectively described, which has become the bottleneck restricting the research of shale nano-pore. This review summarizes some valuable new insights gained in the study of physical properties of shale nanoporous structures. On this basis, the necessity of development of shale pore structure characterization analysis method is proposed. The basic principles and research progress of common shale nanopore characterization methods are also introduced one by one.