seawater type
1.According to their space position, the seismic features of shallow gas in this region can be divided into three groups: (1) features in the stratum: acoustic blanket, acoustic curtains, acoustic turbidity, irregular strong top reflection boundary, and phase pull-down in both flanks; (2)features of the seabed: seabed pockmark and giant sunken pit; (3)features in the seawater column: acoustic plumes, cloudy turbidity and point-line-type reflection.
