Challenges and Measures in Seismic Exploration in Northern Deepwater Area of South China Sea

The challenges in seismic exploration in northern deepwater area of South China Sea are summarized in this paper,including deeper water depth,rugged seafloor,strong multiples generated by hard seafloor,complicated geological structures and so on.The main reasons influencing the quality of seismic data have been analyzed through analyzing seismic data acquisition and processing process.The measures to solve these problems have been proposed.In seismic data acquisition,more favorable acquisition direction,optimization source design,changing the streamer mode,shorter shot space,longer streamer should be taken into consideration.The seismic data processing,advanced processing techniques such as 3D SRME,anisotropic velocity analysis,high order NMO correction,dip angle CRS,PSDM should be used.This study provides a reference and experience for future deepwater seismic data acquisition and processing.