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中文摘要：
秀山上寒武统古油藏沥青主要富集于耿家店组粗晶白云岩晶间孔、晶间溶孔及缝合线中，有机碳含量为3．43％～7．12％，显示其较高的沥青含量。受地表水淋滤氧化作用及微生物降解作用的影响，氯仿沥青“A”及热解烃含量较低，饱和烃含量较低，芳烃、非烃含量较高，轻重烃∑C21-／∑C21＋比值较低。固体碳同位素值具有明显的二分特征，范围分别为-26．7‰-25．6‰和-29．1‰-28．8‰，反映古油藏油气聚集成藏至少有两期，分别来源于不同有机质类型的母岩。根据生物标志化合物、δ13Corg及单体烃同位素对比分析，认为沥青分别来源于下寒武统黑色灰岩和黑色页岩。
英文摘要：
Upper Cambrian paleo-reservoir in Xiushan has an abundance of bitumens mainly occurred in intererystalline pores, intererystalline solution openings and stylolite of Gengjiadian Formation coarse erystalline dolomite. Total organic carbon contents are 3.43%-7.12%, indicating abundant bitumens. Influenced by leaching and oxidation of surface water and microbial degradation, the bitumens have low contents of chloroform bitumen ＂A＂, pyrolysis hydrocarbon and saturated hydrocarbon, high contents of aromatic hydrocarbon and nonhydrocarbon, and low ratios of ∑ C21-/∑C21＋. The solid carbon isotopic compositions have a bimodal distribution pattern with the ranges from - 26.7‰ to - 25.6‰ and from - 29. 1‰to - 28.8‰, indicating at least two stages of oil-gas accumulation of the paleo-reservoir, and the hydrocarbons may come from different source rocks. Based onthe analysis of the biomarkers, δ13Corg values and carbon isotopic compositions of individual n-alkanes, it is concluded that the bitumens came from the Lower Cambrian black limestone and black shale.
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