摘要
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。
Early Paleozoic high-overmature strata are important source rock in Chinese petroliferous basins. Determination of thermal maturity and lower threshold for carbonate source beds, reconstruction of organic matter abundance and hydrocarbon potentials, origin and evolution of organic matter, and hydrocarbon formation are reviewed with respect to assessment of Chinese early Paleozoic high-overmature source rock. The formation of petroleum system of early Paleozoic source rock was experienced through multiple tectonic movement stages, with manifold petroleum generation, migration, accumulation and destruction. Hence, the geological assessment of early Paleozoic source rock must focus on effective hydrocarbon generation since Mesozoic and Cenozoic.
关键词
早古生代
生油岩
生烃潜力
烃源岩
油气勘探
early Paleozoic source rock thermal maturity organic matter richness organic matter evaluation hydrocarbon generation potential
