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文章对准噶尔盆地莫索湾地区侏罗系和白垩系油气地球化学特征、成因及其成藏条件、期次和时间进行了分析 ,油气源对比表明该区原油分为两类 ,第一类原油来源于盆 1井西凹陷二叠系下乌尔禾组烃源岩 ,第二类原油来源于盆 1井西凹陷二叠系风城组烃源岩 ,天然气与第一类原油同源。成藏条件分析表明莫索湾凸起位于盆 1井西凹陷和昌吉凹陷之间的隆起带 ,具有优越的烃源条件 ,白垩系和侏罗系的砂岩储集层发育 ,构造形成时间早于油气形成期。包裹体组分及均一温度研究表明该区侏罗系三工河组和白垩系吐谷鲁群油气为两期成藏 ,三工河组油气成藏时间为晚侏罗纪—早白垩纪 ,吐谷鲁群油气成藏时间晚白垩纪—早第三纪。
This paper analyzes the geochemical characteristics, genesis, hydrocarbon accumulation conditions, period and time of the Jurassic and Cretaceous in the Mosuo Bay area in the Junggar basin. The comparison of hydrocarbon sources indicates that the crude oil in the area is divided into two types. The first type of crude oil Originates from the Permian Lower Wuerhe Formation source rock in the western sag of Well 1 and originates from the source rocks of the Permian Fengcheng Formation in the western sag of Pai 1 well. Natural gas is of the same origin as the first type of crude oil. The analysis of reservoir forming conditions shows that the Mosesau Bay uplift is located in the upwelling zone between the west depression of the basin and the Changji Sag, and has favorable hydrocarbon source conditions. The Cretaceous and Jurassic sandstone reservoirs developed and formed earlier Oil and gas formation period. The study on the composition and homogenization temperature of the inclusions shows that the Jurassic Sangonghe Formation and Cretaceous Tuugulun Formation have two stages of hydrocarbon accumulation in the area, the hydrocarbon accumulation time of the Sangonghe Formation is Late Jurassic-Early Cretaceous, Late Cretaceous - hydrocarbon accumulation in the Early Tertiary.