Gas chimney is one of seismic anomalies resulted from vertical fluid migration, which is the interactional outcome due to overpressure, low stress and shale harrier.

• 摘要气烟囱是由于天然气（流体）垂向运移在地震剖面上形成的含气异常现象，是气藏超压、构造低应力部位和泥页岩封隔层3种因素综合作用的结果。