The offshore oil and gas exploration is gradually advancing deeper. Meanwhile

the South China Sea has great potential for deep-water oil and gas resources. Generally

for the deep water exploration

the project scale is large

the requirements of the project management are high

and the investigation is difficult. Due to the factors such as the changeable marine climate environment

the relatively complex geological environment

the professional survey vessels or survey equipment

and the high requirement of underwater positioning accuracy

the commissioned technical requirements

project capital cost and operation safety risk in the deep water survey area are significantly higher than those in the shallow area. In a deep-water work area in the South China Sea

the seabed picking up

well pass section

maximum negative amplitude and seismic slice of the 3 D seismic data are used to evaluate the bathymetry

seabed topography

shallow strata

faults

amplitude anomalies and other investigation contents of the work area

so as to carry out the disaster prediction and safety assessment of the shallow geological conditions to guide the emplacement

installation and production of the underwater engineering facilities system in the target oil and gas mining area.Based on the 3 D seismic data

a relatively simple and practical method for geological hazard assessment in shallow layer of the deep water is explored. As a part of the desktop research stage in the whole life cycle of EPCI（Engineering

Procurement

Construction and Installation）

this method provides necessary support for the smooth development of the project plan.