【摘要】 塔中 45井奥陶系原油与塔中 10井石炭系、塔中 11井、塔中 35井志留系原油的甾烷、萜烷分布及生物标志物组成特征有差异 ,表明塔中 45井奥陶系原油与其它原油来自不同的油源层系。油、烃源岩对比结果表明 ,塔中 45井奥陶系原油主要来自寒武系。根据萤石的赋存、构造形态 ,结合油源对比结果 ,可以推断萤石的形成与Ⅰ号断裂加里东期构造活动有关。塔中45井中、上奥陶统油藏可能存在 3期油气充注 :加里东期末—海西早期、海西晚期和印支—燕山期。满加尔凹陷中西部及塔中低凸起北斜坡台地相的寒武系烃源岩在海西晚期所形成的油气构成现今油藏的主体。图 3参 6 (林青摘 )更多还原

【Abstract】 The difference of sterane and terpane distribution indicates that the source of Tazhong 45 well Ordovician reservoir oil is different from the other oil of Tazhong 10, 11, 35 well on the North slope of Tazhong uplift. Correlation between oil and source rock shows that the Ordovician reservoir oil of Tazhong 45 well is derived mainly from Cambrian source rock. According to the occurrence and structural feature of CaF₂, it can be inferred that the No.I fault activity maybe response for the generation of CaF₂.Integrated with the result of oil-source correlation, and the occurrence of bitumen with different reflection ratio and different fluorescence, it can be deduced that perhaps there are three phase oil charging to the Ordovician reservoir of Tazhong 45 well: that is in the Early Ordovician, Permian and Cretaceous. And the oil yielded in the Permian from the source rock of Cambrian-Lower Ordovician in the west of Manjiaer Depression and in the North Slope of Tazhong Uplift is the dominant section of the current reservoir.更多还原