中文摘要：

我国继2007年5月在南海北部海域钻获天然气水合物实物样品之后，又于2009年6月在青海省祁连山南缘永久冻土带成功钻获宝贵的天然气水合物实物样品，实现冻土区发现天然气水合物的零突破。作为国际上冻土区勘探开发比较成熟的3大典型区，美国阿拉斯加北坡项目、加拿大麦肯齐三角洲Mallik计划和俄罗斯西伯利亚麦索雅哈气田开发的勘探开发史对我国的天然气水合物勘探开发工作起到了一定的启示作用。通过对这3大冻土区天然气水合物勘探开发项目的详细综述，分析了国际上水合物勘探开发现状，总结了国际冻土区天然气水合物勘探开发史对我国的勘探开发工作带来的启示。

英文摘要：

China,in May 2007 ,obtained the sample of natural gas hydrate through drilling in the northern South China Sea. Then in June 2009, China again successfully obtained samples of permafrost gas hydrate from the southern margin of the Qilian Mountains in Qinghai Province as a breakthrough. The history of exploration and exploitation of Alaska North Slope project in America, Mackenzie Delta Mallik Plan in Canada and Siberian Messoyakha gas field exploitation project in Russia,as the matured international cases for exploration and exploitation of gas hydrate in permafrost, are introduced for reference. Based on detailed review of the three projects. We could learnt from history the experiences to stimulate gas hydrate exploration and exploitation in China＇s permafrost regions.