The Longtan Formation-Dalong Formation dark shale in the lower Yangtze area, Jiangsu has rather large thickness (60~100m), organic carbon content (average 2.0%~3.0%) and regional discrepancy on thermal evolution degree (0.5%~3.0%), thus endow with fine potential to form shale gas reservoir. Brittle mineral content in dark shale is rather high and advantageous to later stage fractur-ing and exploitation. Based on dark shale thickness, buried depth, organic carbon content and maturity distribution characteristics as well as gas-bearing properties, applying information stacking method, finally optimized out the Lishui-Jurong and Danyang-Haian zones as favorable area category I and Wuxi-Zhangjiagang zone as favorable area category II.%江苏下扬子区龙潭组-大隆组暗色泥页岩厚度较大（60~100m），有机碳含量较高（平均为2.0%~3.0%），热演化程度区域上差异较大（0.5%~3.0%），总体具有形成页岩气藏的良好潜力。暗色泥页岩中脆性矿物含量较高，利于后期的压裂和开发。根据研究区暗色泥页岩页岩厚度、埋深、有机碳含量和成熟度展布，以矿物成分和含气性特征等特征，运用信息叠合法，最终优选出溧水-句容、丹阳-海安为Ⅰ类有利区，无锡-张家港为Ⅱ类有利区。
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