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下古生界高过成熟地层是我国重要的烃源岩。本文对下古生界烃源岩有机质成熟度评价、有机质丰度和生烃潜力恢复、有机质丰度下限、烃源岩有机质特征和成烃作用等进行了论述。我国下古生界烃源岩含油气系统的形成一般跨越了多个构造期,呈现了多期油气生成、多期油气成藏,同时又遭受多期破坏的特点,在下古生界烃源岩的地质评价中主要应关注中新生代以来有效的生烃史。
Lower Paleozoic overripe mature strata is an important source rock in China. This paper reviews the maturity evaluation of organic matter in the Lower Paleozoic source rocks, the recovery of organic matter abundance and hydrocarbon potential, the lower limit of organic matter abundance, the organic matter characteristics of hydrocarbon source rock and hydrocarbon generation. The formation of petroleum systems in Lower Paleozoic source rocks generally extends over a number of tectonic periods and presents the characteristics of multi-stage hydrocarbon generation and multi-period hydrocarbon accumulation while undergoing multiple stages of damage. In the Lower Paleozoic source rocks The geological evaluation should mainly focus on the effective hydrocarbon generation history since Mesozoic and Cenozoic.