青海木里地区天然气水合物形成条件分析  

Analysis of Formation Conditions of Natural Gas Hydrate in Muli Coalfield,Qinghai Province

作　　者：曹代勇[1] 刘天绩[2] 王丹[1] 王佟[1,3] 文怀军[2] 潘语录[2] 

机构地区：[1]中国矿业大学煤炭资源与安全开采国家重点实验室,北京100083 [2]中国煤炭地质总局青海煤炭地质局,青海西宁810001 [3]中国煤炭地质总局,北京100039

出　　处：《中国煤炭地质》2009年第9期3-6,共4页Coal Geology of China

基　　金：国家自然科学基金(40872105);中国煤炭地质总局科技发展专项基金(2008-Ⅰ-02)

摘　　要：我国的青藏高原地区有大面积的多年冻土分布,其适宜的温压条件为天然气水合物的形成创造了有利的环境。在青藏高原北部祁连山区木里煤田多年冻土层煤炭地质勘查施工中,发现天然气水合物存在的证据。通过分析木里地区多年冻土带天然气水合物的形成条件,对天然气水合物烃类气体的来源进行了探讨,提出煤层和煤系分散有机质热演化过程中形成的烃类气体是木里煤田天然气水合物主要来源的观点,将并其称之为"煤型气源"天然气水合物。There are large areas of permafrost in the Qinghai-Tibet plateau, where the appropriate temperature and pressure conditions created a favorable environment for the formation of natural gas hydrate. In recent years, some evidences of the gas hydrate were discovered during coal geological exploration in permafrost zones of Muli coalfield, Qilian Mountain, northern Qinghai-Tibet plateau. This paper analyzed the formation conditions of natural gas hydrate in Muli coalfield, particular the sources of hydrocarbon gases in natural gas hydrate, then proposed a view that the main source of gas hydrate come from the hydrocarbon gases produced during thermal evolution of coal and dispersed organic matter in the coal measures, and call this type in Mull coalfield as ＂coal related gas source＂ of natural gas hydrate.

关 键 词：天然气水合物 “煤型气源”天然气水合物 木里煤田 形成条件 

分 类 号：P618.1[天文地球—矿床学]