Abstract: The long-streamer and large-capacity quasi-3D seismic survey technology is used to obtain 3D seismic data that cover the study area equal times under different source-detector distances.To this end,it obtains high-density acquisition of seismic data using a single source array in shooting,a single long cable for data receiving,and traditional 2D acquisition.Meanwhile,it conducts bin regulation using the 5D interpolation method according to the 3D process flow.This technology can used to effectively improve the seismic imaging effects in medium-deep parts in turbulent sea areas,thus satisfying the need for oil and gas exploration.This study primarily introduces the key methods for the acquisition and processing of seismic data.