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应用有机岩石学、热解分析等地球化学分析技术,对拉布达林盆地下白垩统上库力组一段烃源岩进行干酪根元素分析、岩石热解分析和高温高压热模拟实验。探讨了拉布达林盆地下白垩统上库力组一段烃源岩的显微组分、有机质丰度、类型和成熟度等特征,分析了其生烃潜力和生烃属性。将上库力组一段烃源岩显微组分划分为壳质组、镜质组和惰质组3种类型,其中,壳质组中来源于水生生物的腐殖无定形体含量很高(94%～97%),有利于生油;有机质丰度较高,达到中到好的级别;烃源岩有机质类型较好,主要为II1型和II2型;有机质热演化程度较低,主要处于生油的低成熟阶段。结果表明,拉布达林盆地上库力组一段烃源岩具备较好的生油潜力,具有很好的油气勘探前景。
Based on the geochemical analysis techniques such as organic petrology and pyrolysis analysis, the karst element analysis, rock pyrolysis analysis and high temperature and high pressure thermal simulation of the first member of the Upper Cretaceous Lülida Formation in Labudalin Basin have been done. The characteristics of hydrocarbon source rocks, such as the abundance, type and maturity of organic matter, of the first member of the Upper Cretaceous Lüludaolin Basin are discussed, and their hydrocarbon generation potential and hydrocarbon generation properties are analyzed. The microscopic components of the source rocks of the first member of the Upper Calypsomatic Group are divided into three types, ie, the chitin group, the vitrinite group and the inertinite group. Among them, the humic substance derived from aquatic organisms in the chitin group is very high ( 94% -97%), which is good for oil generation. The abundance of organic matter is high and reach the middle-to-good level. The organic matter types of source rocks are better, mainly Type II1 and II2. The degree of thermal evolution of organic matter is low, Low maturity of raw oil. The results show that the source rocks of the first member of the Upper Lurica Formation in the Labudalin Basin have good potential for oil generation and have good prospect of oil and gas exploration.