Shallow water flow, shallow gas and gas hydrate have been encountered in the deep water drilling. In order to predict the geological disasters we need to study the mechanism, identification and engineering dangerous. By using geophysics and numerous modelling, in combination with drilling hole and well logging data, there are great progresses in the ‘three shallow’ geological disasters. For the time being, we also found the over pressured system, shallow gas and gas hydrate in the LW3-1 gas field. The discovery of deepwater channel sand indicated that possibility existence of shallow water flow. By the progress of deepwater hydrocarbon exploration and development, it is very important to evaluate and predict the ‘three shallow’ geological disasters.