探讨苏皖地区二叠系页岩气成藏地质条件。通过对苏皖地区二叠系页岩的野外露头地质剖面及有机地球化学的综合研究，表明苏皖地区于海相深水环境条件下沉积的二叠系孤峰组、龙潭组和大隆组发育有3套优质高碳暗色页岩，此3套页岩出露范围广，厚度大，埋藏深度适度，有机质含量高、成熟度适中，孤峰组和大隆组页岩干酪根以ⅡB 型和ⅠA 型为主，龙潭组煤系地层暗色页岩干酪根以Ⅲ型为主，各层系页岩中的脆性矿物含量高（质量分数≥50％），微裂缝发育。孤峰组和大隆组具备优越的页岩气成藏条件；而龙潭组兼具页岩气和煤层气成藏条件，可列为近期非常规能源规划的首选勘探区之一。%The geological conditions of the Permian shale gas accumulation in the Jiangsu-Anhui area are very important to alleviate our rising energy demand pressures.By a comprehensive study of the geological sections and organic geochemistry,three sets of high-quality dark shales with high carbon deposited in deepwater marine environment have been found in Gufeng Formation,Longtan Formation and Dalong Formation in the Jiangsu-Anhui area.The three sets of shales in the Jiangsu-Anhui area have wide outcrops,big thickness,moderate burial depth,high contents of organic matter and moderate maturity.The kerogens of Gufeng Formation and Dalong Formation shale are dominated byⅡB and ⅠA .The kerogens of Longtan Formation coal-bearing dark shales are dominated by Ⅲ.The content of the brittle minerals in the three formations is high (≥50%)and the microfractures develop well.This shows that Gufeng Formation and Dalong Formation have favorable shale gas accumulation conditions,and Longtan Formation has both shale gas and coalbed methane accumulation conditions in the Jiangsu-Anhui area.They can be classified as the first choice of our recent unconventional energy exploration areas.
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