中文摘要：

以含油气系统为切入点研究了天然气水合物的成藏,识别出天然气水合物含油气系统6个控制因素：稳定的温度-压力条件、气源、水源、气体运移、适宜的沉积物或储集岩和圈闭形成时间。针对这些特点,初步提出了工作思路及研究方法,特别提及轻烃气体浓度与同位素分析法、孔隙流体特定组分分析法和轻烃蚀变产物分析法3种地球化学勘探方法。在此基础上,以开心岭-乌丽地区天然气水合物含油气系统为例证明了天然气水合物含油气系统的可靠性,进而为中国冻土区天然气水合物成矿有利区优选提供了新的理论依据。

英文摘要：

By the study of natural gas hydrate,most people’s studies are mainly concentrating on natural gas hydrate accumulation.From the study of natural gas hydrate accumulation based on petroleum system,there are six controlling factors about natural gas hydrate petroleum system,which contain gas hydrate stability conditions,gas source,water source,gas migration,suitable reservoir rocks and entrapment forming time.In view of these characteristics,three geochemical exploration methods are mentioned.They are light hydrocarbon gas concentration and isotopic analysis,pore fluid specific component analysis and light hydrocarbon alteration product analysis.On this basis,a case study of Kaixinling-Wuli area natural gas hydrate petroleum system proves the reliability of natural gas hydrate petroleum system.This will provide new theoretical basis to find resource potential and reservoir distribution of natural gas hydrate in permafrost areas of China.