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采用有机岩石学全岩分析方法，剖析了苏北盆地下第三系低熟烃源岩。该盆地烃源岩具有藻类微生物与高等植物混合的生源构成，富含腐泥组，相对发育镜质组和壳质组。“腐泥组＋壳质组”含量与氯仿沥青、总烃和产油潜量呈密切正相关。确认藻类体和孢子体为其最主要的生烃组分，在此基础上建立了苏北盆地下第三系烃源岩的生烃模式。
Based on the whole rock analysis method of organic petrology, the source rocks of lower Tertiary in the Northern Jiangsu Basin are analyzed. The source rocks of the basin have the composition of raw materials mixed with algae microorganisms and higher plants, and are rich in sapropelic units and relatively developed vitrinite and chitin groups. The content of “sapropelite + chitin group” is closely related to the content of chloroform bitumen, total hydrocarbon and oil production. The algae body and sporophyte were identified as the most important hydrocarbon generation components. Based on this, the hydrocarbon generation modes of the Lower Tertiary source rocks in the Northern Jiangsu Basin were established.