天然气水合物属于一种特殊的非常规天然气资源,其资源潜力巨大,不仅是常规天然气资源的重要补充和替代物,亦是一种新型的低碳绿色高效能源.根据天然气水合物形成的特殊地质条件及分布富集规律,深入剖析了全球天然气水合物的地质地球化学特征及成因类型与气源构成特点,全面总结了世界天然气水合物勘查技术方法和研究进展.同时,亦对我国天然气水合物勘查成果与研究进展进行了分析总结.“,”As a kind of unconventional gas resources with great potential,the gas hydrate has raised great attention from the international society.It is not only an important supplement and substitutes to conventional natural gas resources,but also a kind of green and efficient low-carbon energy.According to the geological conditions for its formation and distribution,we made a comprehensive review on the geological and geochemical characteristics of gas hydrate in a global viewpoint,discussed its genetic type and its relation with source of gases.A summary of the progress of exploration techniques,in particular the progress in China,is also presented.