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基于两江地区青山口组泥岩盖层的宏观、微观封闭特征以及Ｔ２断层的封闭特征，对其封盖能力进行了综合研究；该区大部分地区具有好—中等的封盖层能力，并且其封闭能力形成时期早于其自身的排油期。封闭扶杨油层油的有效性好，有利于扶杨油层油的大规模聚集与保存，是该区扶杨油层至今能找到一大批油田的重要原因之一。
Based on the macroscopic and microscopic closed features of the mudstone cap rocks in the Qingshankou Formation in the Liangjiang River Basin and the sealing features of the T2 fault, the sealing ability of the mudstone caprock was comprehensively studied. Most of the area has the good capping ability and the closed Capacity formation period earlier than its own oil discharge period. The effectiveness of the closed Fuyang oil reservoir is good, which is conducive to the large-scale accumulation and preservation of the oil in the Fuyang reservoir. It is one of the important reasons why a large number of oilfields can be found in the Fuyang reservoir in this area.