从岩性特征、有机质丰度、有机质类型及有机质成熟度等方面对米仓山—大巴山前缘古生界16条剖面中的烃源岩进行有机地球化学特征的研究,认为研究区内下寒武统及下二叠统为主力烃源岩地层,下志留统及上奥陶统在局部地区存在有利的烃源岩发育段。烃源岩有机地球化学特征综合分析表明,研究区烃源岩主要为生烃能力较强的Ⅰ型、Ⅱ1型,均处于高成熟—过成熟阶段,以过成熟烃源岩为主,但仍具有生气能力。 Based on the organic geochemical characteristics of the source rocks in 16 sections of the Paleozoic in the front of Micangshan-Daba Mountains in terms of lithology, organic matter abundance, organic matter types and organic matter maturity, The Cambrian and the Lower Permian are the main hydrocarbon source rocks. The Lower Silurian and the Upper Ordovician have favorable hydrocarbon source rock development in some areas. The comprehensive analysis of organic geochemical characteristics of source rocks shows that the source rocks of the study area are mainly Type I and Type II1 with high hydrocarbon generation ability, all of which are in the stage of high mature-overripe and are mainly over-matured source rocks. However, With vitality.