Abstract: Natural gas hydrate, as a new type energy, 90% of them exists in the Marine environment. While Submarine sandstone hydrate, as one of the many hydrate types, has the highest reserves and the best quality. Therefore it has the most development value. This paper introduced and analyzed the influencing factors and reserves prediction of seabed sandstone hydrate formation. In terms of influencing factors, the effects of seabed sandstone particle size, seabed sandstone interface characteristics, salt concentration and gas composition on sandstone hydrate formation were discussed and also analyzed the reasons for its impact. In terms of reserves prediction, the research on exploration field and numerical analysis is summarized, and it pointed out the most suitable solution for predicting the sandstone hydrate reserves. In addition, the research directions in future on hydrate reserve prediction are also proposed. Firstly, there is no uniform conclusion on the effect of seafloor sandstone particle size on hydrate. This may be due to the fact that different scholars do not have a uniform division of particle size range. Therefore unified for the influence of seafloor sandstone porosity on hydrate is studied. Secondly, a function of salt concentration in seawater as a function of the submarine sandstone depth needs to be established, so that hydrate reserves can be predicted more accurately.

Key words: Hydrate, Methane, Phase equilibria, Sandstone, NaCl, Reserves prediction

摘要： 天然气水合物作为一种新型能源，90%储存于海洋环境中，其中以海底砂岩水合物储量最高，质量最好，最具开发价值。从海底砂岩水合物生成影响因素及储量预测两个方面的研究进展进行了分析和介绍。在生成影响因素方面，主要阐述了海底砂岩粒径、界面特性、盐的浓度和气体组分对砂岩型水合物形成量的影响，并分析了其影响原因；在储量预测方面，总结了勘探和数值分析的研究进展，分析了砂岩水合物储量的预测方案，并提出了海底砂岩水合物的研究方向：一是研究海底砂岩粒径对水合物的影响还没有统一的结论，这可能是由于不同学者对于粒径范围没有一个统一的划分，因此把砂岩粒径统一到孔隙度对水合物的影响进行研究，更贴近海底砂岩水合物的实际情况；二是建立盐浓度与海底砂岩深度的函数关系，可以更准确预测水合物储量。

关键词: 水合物, 甲烷, 相平衡, 砂岩, NaCl, 储量预测