Types and characteristics of deepwater geologic hazard in Qiongdongnan of the South China Sea

Qiongdongnan deepwater area of the South China Sea has mo re abundant potential reserves of oil and gas, and the exploration and development are growing.However, the deepwater area is located between the continental slope and the Xisha Trough characterized by drama tic topography, and complex hydrodynamic and seabed geology, so there are many trigger mechanism of geohazard. If neglected the potential geohazards, that could bring huge losses for oil drilling platform.The seabed geological conditions are studied based on the collecting information and some types of potential geohazard have been found, and the types and characteristics of deepwater geohazard should be paid attention to are described in this paper.