摘要
通过对四川盆地侏罗系烃源岩展布特征研究,总结了侏罗系烃源岩在盆地内的分布特征,指出川中、川北和川东地区烃源岩厚度较大。在此基础上,对中、下侏罗统源岩的有机质丰度、有机质类型和热演化程度进行研究,得出盆地中部、北部和东北部有机质丰度高于西部和西南部,一部分源岩为Ⅲ型,另部分源岩为Ⅱ型,少数源岩为Ⅰ型,其有机质类型优于上三叠统,源岩已达到成熟到高成熟阶段。
With study on distribution of Jurassic source rocks in Sichuan Basin, the distribution features of Jurassic source rocks are summed in Sichuan Basin. It is found the source rocks have big thickness in the central, north and east Sichuan areas. On basis of that conclusion, the riches, types and maturation of organic material are studied for the Meddle and Lower Jurassic source rocks. It is concluded the riches of organic material in the central, north and northeast areas of the basin are higher than that in the west and southwest areas of the basin. Some source rocks belong to Class Ⅲ, others belong to ClassⅡ and a few belong to ClassⅠ. Their types of organic material are better than that of Upper Triassic. The source rocks have reached the mature and over-mature stages.
出处
《天然气勘探与开发》
2005年第2期15-17,69,i002,共5页
Natural Gas Exploration and Development
