【摘要】 采用有机岩石学分析方法,结合有机地球化学资料对东海盆地西湖凹陷下第三系烃源岩(煤和泥岩)进行剖析研究.本区烃源岩富镜质组(>60%),贫惰性组(<10%),含10%~30%的壳质组和腐泥组;“壳质组十腐泥组”含量与氯仿沥青、总烃和有效磷等呈正相关关系;树脂体和“孢子体-藻类体”分别为早期成烃和晚期成烃的组分,并相应建立了本区烃源岩的成烃模式.更多还原

【Abstract】 Combined with organic geochemical data, this paper deals with the detailed study on hydrocarbon source rocks (coal and mudstone)samples from Xihu sag, East China Sea Basin, mainly through the analytical method of organic petrology. The results demonstrate that source rocks of Xihu sag contain rich vitrinite (>60%), poor inertinite (<10%)and a certain quantity of "exinite plus sapropelinite"(10-30%). The "exinite plus sapropelinite" content has a close correlation to the yield of choloroform bitumen, total hydrocarbon content and pyrolytic effective carbon amount. Resinite and "sporinite plus alginite" are the important hydrogen-rich maceral for early and late oil generation respectively. Thus a kind of hydrocarbon generation model is established.更多还原