摘要
在青海木里天然气水合物发现区分别采集50件浅表土壤样品和顶空气样品,采用顶空间轻烃法、酸解烃法和蚀变碳酸盐法研究其浅表地球化学特征。结果表明,顶空气中可检测出C1—C3,土壤中检测出C1—C5,酸解烃各指标之间具有显著的相关性,碳酸盐指标与酸解烃也呈显著的正相关。地表烃类气体来源为原油伴生气、凝析油伴生气和煤型气,与水合物同源,显示出深部热解成因气的特征。
Based on analyzing hydrocarbon gas of fifty soil and headspace gas samples collected from near-surface soil in Mull per- mafrost of Qinghai Province by such means as acidolysis hydrocarbon, headspace gas and content of AC, the authors found that CI-C3 can be detected from headspace gas, and C^-Cs from soil. Acidolysis hydrocarbon and carbonate show significant positive correlation. The hydrocarbon gas in near-surface area seems to be derived from crude oil associated gas, condensate oil-associated gas and coal- related gas, being of the same source as the hydrate gas and showing deep pyrolysis characteristics. The results obtained are of important scientific significance for geochemical exploration of gas hydrate in permafrost regions.
出处
《地质通报》
CAS
CSCD
北大核心
2011年第12期1883-1890,共8页
Geological Bulletin of China
基金
国土资源部公益性行业科研专项经费项目<冻土区天然气水合物物化探技术攻关>(编号:201111019)
中央级公益性科研院所基本科研业务费专项<永久冻土区天然气水合物地球化学勘查模型研究>(编号:AS2010J07)
关键词
天然气水合物
地球化学
酸解烃
顶空气
木里冻土区
gas hydrate geochemistry acidolysis hydrocarbon headspace gas Muli permafrost region
