摘要
从天然气水合物的晶体结构模型出发,说明了其组成成分及结构特征。通过对温度—压力平衡条件的差异性分析,揭示了天然气水合物形成的基本条件,对其赋存类型及成因进行了分类,对我国及全球天然气水合物分布情况进行了说明,并以青海木里煤田为例,对天然气水合物的形成条件和成因进行了详细的论述,认为:变质作用及煤化作用使煤田内丰富的煤炭资源不断产生煤层气,当煤层气沿断层破碎带及裂隙运移至含水岩层或含水裂隙时,在温度和压力的作用下遇水形成天然气水合物。强调在开发利用天然气水合物时,必须考虑水资源的保护和综合利用。
Start from crystal structure model of the natural gas hydrate, illustrated its composition and structural features. Through temperature-pressure equilibrium condition discrepancy analysis, revealed basic terms of natural gas hydrate formation and classified its hosting pattern and genesis. The paper illustrated national and global distribution of natural gas hydrate, to take the Muri coalfield in the Qinghai Province as an example, discussed its forming condition and cause of formation in detail. Considered that the metamorphism and coalification make the abundant coal resource producing coal bed gas constantly, when the gas migrating along the shattered fault zones and fractures into water-filled strata or fractures, natural gas hydrate will be formed under the temperature and pressure. It is emphasized that, during the exploitation and utilization of natural gas hydrate, the protection and comprehensive utilization of water resource have to take into account.
出处
《中国煤炭地质》
2009年第12期7-11,共5页
Coal Geology of China
关键词
天然气水合物
分布特征
形成条件
存在类型
成因分析
木里煤田
natural gas hydrate
distribution feature
formation condition
hosting pattern
genetic analysis
Muri coalfield
