关键词: 青山口组, 泥岩, 控制, 封闭油气藏

Abstract: The sealing ability of mudstone caprock of Qingshankou formation in the area between Nenjiang River and Songhuajiang Rivers is comprehensively studied based on the macroscopic and microscopic sealing ability,and so is the T₂ fault. It is considered that its sealing ability is good to better in the area .and the period of forming the ability is earlier than that of the oil expulsion by itself. Its sealing ability for the Fu-Yang oil reservoirs is effective. It is favorable for the accumulation and preservation of oil in the Fu-Yang reservoir is large scale .and is one of the important factor,which made many oil fields still could be found in the Fu-Yang reservoir in the area.

Key words: Qingshankou formation, mudstone caprock, control, closed reservoir