柴窝堡凹陷二叠系芦草沟组页岩气烃源岩评价

摘要

在野外露头观测及样品有机地球化学分析基础上，明确陆相盆地烃源岩评价条件和标准，对柴窝堡凹陷二叠系芦草沟组页岩有机质丰度、成熟度、有机质类型等烃源岩重要评价参数进行研究。结果表明，柴窝堡凹陷芦草沟组页岩有机质丰度较高，总体为中等-好烃源岩，热演化程度处于成熟-高成熟阶段，有机质类型主要为Ⅲ型，以生气为主。近源沉积不仅稀释了研究区芦草沟组页岩有机质含量，导致有机质降解，并造成柴窝堡凹陷与准南地区有机质类型和丰度的差异。沉积环境的不同导致柴窝堡凹陷芦草沟组页岩有机质丰度北高、南低，有机质类型北好、南差状况。%Through outcrops observation and systematic sampling,on the basis of organic geochemical analysis of out-crops samples,there has been clear about the requirements and standards of the hydrocarbon source rock evaluation in continental basin and important evaluation parameters of hydrocarbon source rock like the organic matter abundance,ma-turity and type of Lucaogou formation in Chaiwopu sag have been systematically studied. The result showed that this set of source rocks are abundant in organic material,during the high mature and post mature phases and the type Ⅲ of organ-ic matter is dominant,and at stage of mainly producing gas.Proximal deposit is not only dilute the organic matter content and led to the organic matter degradation,and make organic matter abundance differences between Chaiwopu Sag and south Junggar Basin.Organic matter abundance differences of northern and southern sag are most attributed to the differ-ences of sedimentary environment.