摘要
通过对准噶尔盆地西北缘天然气地球化学特征和气藏地质特征的分析,认为该区天然气可以分为3种类型:油型气、煤型气和混合气。不同类型的天然气,其组分、碳同位素和轻烃特征各异,并且分布区域和层系也表现出差异性。含油气系统控制了天然气藏的地理分布;圈闭条件控制了气藏的类型及规模;盖层条件控制着天然气藏的层系分布;疏导体系控制着天然气的运聚。认为玛湖背斜、玛北背斜等大型构造具备形成大型气田的条件,应作为天然气勘探的重点对象;中拐凸起北斜坡及五八区是目前最现实的天然气勘探区域。
The characters of geochemistry of natural gas and geology of gas reservoirs in the northwestern margin of Junggar Basin are analyzed,which shows that natural gas of the region is classified as petroliferous gas,coaliferous gas and combination gas.They are characterized by different characters of component,carbon isotopes,light hydrocarbons and the different distribution regions and series of strata.Petroleum system dominates the geographic distribution of natural gas reservoirs.The trap condition controls the types and scale of natural gas reservoirs.The cap formation condition controls the series of stratum distribution of natural gas reservoirs.The leading system controls the migration and accumulation of natural gas.It is considered that Mahu anticline and Mabei anticline provide conditions for forming the large gas field,and is an important target of natural gas exploration.The north slope of Zhongguai swell and Wuba Region is the practical region of natural gas prospecting.
出处
《石油天然气学报》
CAS
CSCD
北大核心
2007年第2期20-23,共4页
Journal of Oil and Gas Technology
关键词
准噶尔盆地
西北缘
天然气
地化特征
气藏特征
成藏规律
Junggar Basin
northwestern margin
natural gas
geochemistry character
natural gas reservoir character
rule of accumulation.
