【摘要】 塔中 11井是塔里木盆地志留系产层的发现井。本文通过对该井储集岩烃类地球化学的描述 ,筛选出 6个样品进行详细的地球化学研究。研究结果表明 ,其储集岩烃类生物标志化合物分布模式相同 ,可对比性强 ,揭示了该烃类可能来源于同一套烃源岩。沥青砂岩和油砂正构烷烃的分布特征 ,反映出志留系古油藏曾遭受过较严重的生物降解作用 ,形成沥青砂岩 ;后期形成的油气继续注入该储集岩 ,导致了沥青砂岩和油砂饱和烃色谱图上既有很多未分辨有机化合物 (UCM) ,又有碳数齐全的正构烷烃的分布模式。储集岩烃类组成特征和成熟度非均质性还揭示了该井志留系储层可能存在 3期油气注入过程更多还原

【Abstract】 Well Tazhong 11 was the discovery well of Silurian reservoirs in Tarim basin. Through discussing geochemistry of hydrocarbons in this well, 6 samples were selected for detailed study. The result of this study showed that hydrocarbons from these reservoir rocks shared the same distribution mode of chemical biomarker; they were comparable and might generate from the same source rock. Distribution features of n alkane showed severe biodegradation occurred in ancient Silurian reservoirs, forming tar sandstone. Oil and gas generated in latter period continued entering into reservoir rocks, resulting in both unidentified organic compounds and n alkane of complete range presenting on the chromatogram of saturated hydrocarbons of tar sand and oil sands. Hydrocarbon composition and heterogeneous maturities also inferred that there might be 3 periods of oil and gas infilling courses in Silurian reservoirs of this well.更多还原