中文摘要：

选择准噶尔盆地腹部3个凹陷和隆起区不同储层中13个原油样品,进行了全油碳同位素组成分析,应用GC-MS, GC-IRMS和GC-TC-IRMS技术先后开展饱和烃生物标记化合物、正构烷烃单体碳、氢同位素组成分析。首先通过全油碳同位素组成和生物标记化合物参数将侏罗系原油和二叠系原油明显区分开,进一步通过饱和烃单体碳同位素分析将准噶尔盆地不同储层原油划分为两种类型及它们的过渡型：以侏罗系与二叠系乌尔禾组为代表的陆相淡水型和以石炭系与二叠系风城组为代表的咸水湖相型及两者的混合型,并对油藏在破坏和后期充注再成藏的过程中混合原油的单体碳同位素组成变化做了讨论。原油单体氢同位素组成对不同水环境和古纬度反应敏感,其明显的分馏效应在石炭系、二叠系和侏罗系原油中有很好的表现,据此可以对不同时期古环境进行很好的区分。

英文摘要：

13 different reservoir oil samples from three depressions and uplift areas in Junggar Basin were chosen to determine the whole oil carbon isotope compositions, and to analyze the biomarkers of saturated hydrocarbon, the compound-specific stable carbon and hydrogen isotope compositions of n-alkane using GC-MS, GC-IRMS and GC-TC-IRMS. Jurassic and Permian crude oils were separated by whole oil carbon isotope compositions and biomarker parameters; crude oils were divided into two types and their transitional patterns by their compound-specific stable carbon isotope compositions, i.e. the terrestrial freshwater type in Jurassic and Permian Wuerhe Group, the lacustrine saline water type in Carboniferous and Permian Fengcheng Group and their mixed type. Also discussed were the variations of compound-specific carbon isotopic composition of mixed oils from post-accumulation process. Crude oil compound-specific stable hydrogen isotope composition is sensitive to different water environments and ancient latitude, and its fractionation effect is significant in the Carboniferous, Permian and Jurassic crude oil. Accordingly, different periods of the ancient environment can be well distinguished.