【摘要】 天然气水合物在世界范围内分布广泛,主要分布在海洋和冻土带地区,并与地质构造环境密切相关。目前已发现的天然气水合物矿点,主要是通过似海底反射地震显示进行识别的。天然气水合物的甲烷来源主要有生物气、热解气和无机成因气,大多数研究主要立足于甲烷气的成因来探究天然气水合物的聚集和成藏机理。分析了天然气水合物形成的主控因素,包括气源、沉积、构造、温压等条件,这些条件控制着天然气水合物的赋存状态、形成规律和规模大小,并对墨西哥湾天然气水合物成藏有利条件进行了分析,对我国天然气水合物的勘探有借鉴意义。更多还原

【Abstract】 Gas hydrates are widely distributed in the world,mainly in the oceans and permafrost regions,and closely related with the geological and structural environment.Now,these gas hydrates deposits that have been found are mainly identified by BSR.The methane origin in gas hydrates includes biogenic,pyrolysis gas genetic and inorganic gases.The gas hydrates accumulation and mechanism explored by most researchers is mainly based on the genesis of methane gas.This paper analyzes the controlling factors of forming gas hydrates,including the gas source,deposition conditions,geological structural conditions,temperature and pressure conditions,etc.It is these that control the existing state,formation mechanism and scale of gas hydrates deposits.Also,this paper analyzes the favorable conditions of gas hydrate accumulation in the Gulf of Mexico for the purpose of being taken as a reference for China’s gas hydrate exploration.更多还原