下扬子区上二叠统龙潭组页岩气勘探前景

摘要

通过对下扬子地区龙潭组页岩气基本地质条件的分析,并对比美国典型页岩气地质特征,认为下扬子地区上二叠统龙潭组具有良好的页岩气地质条件.通过构造、龙潭组暗色泥页岩的赋存特征和生烃条件的综合分析,将下扬子区龙潭组页岩气勘探分为3类区块,分别是Ⅰ类优选区块,Ⅱ类潜力区块和Ⅲ类前景区块,其中,Ⅰ类优选区块中皖南宣泾盆地水东向斜和环太湖锡澄虞地区的祝塘复向斜具有良好的页岩气生成和保存条件,是下扬子区页岩气的最有利勘探区.%Based on the geological conditions of Longtan Formation in the Lower Yangtze region and its comparison with the geological characteristics of typical American shale gas,Longtan Formation is believed to have good geological conditions for shale gas.Based on tectonic analysis,and the occurrence characteristics of Longtan Formation shale and hydrocarbon generating conditions,the shale gas exploration of Longtan Formation can be separated into three divisions.Type Ⅰ,optimized division ; Type Ⅱ,Potential division ; and Type Ⅲ,perspective division.Among them,the Type Ⅰ Shuidong Syncline in Xuanjing Basin and Zhutang Synclinorium along Lake Taihu are the most favorable areas for shale gas exploration due to its good conditions in the Lower Yangtze region.