Abstract:The multi-azimuths/wide-azimuth and high-density seismic acquisition in marine exploration could enhance the subsurface imaging in terms of illumination and energy focusing.However,the huge amount of shot gathers poses great challenge for seismic imaging.Besides,as the exploration target becomes deeper and deeper,the inelastic absorption affects the imaging quality of deep reservoirs.To solve these problems,we propose in this paper a full 3D double-square-root (DSR) prestack depth migration (PSDM) method in visco-acoustic medium.The full 3D DSR PSDM method has several advantages.Firstly,it does not need to select the migration aperture.Secondly,it is suitable for the multi-azimuths/wide-azimuth and high-density marine seismic data with a large number of shots.Thirdly,it can extended to the absorption medium.Fourthly,ADCIGs of all azimuths can be easily generated.With large memory and the high-dimensional fast Fourier transform,this method can largely improve the migration efficiency.Synthetic data and real marine data processing demonstrate the feasibility of the proposed method.
赫建伟, 邓勇, 任婷, 黎孝璋, 张文祥, 鲁统祥. 黏声介质全三维双平方根方程叠前深度偏移及其在海上数据中的应用[J]. 石油地球物理勘探, 2018, 53(6): 1210-1217.
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