Pre-Salt Depth Imaging of Santos Basin, Brasil
Recent large pre-salt discoveries in deep water Santos Basin, Brasil, such as Tupi and Sugarloaf, prompt significant interest in better pre-salt imaging. Although the sedimentary velocity variation is relatively smooth, depth migration is required for imaging complex salt and pre-salt layers. The presence of both mobile salt and layered evaporates makes the velocity model building flow more challenging than the flow in the Gulf of Mexico (GOM). The main difference is that we introduce an additional step of salt layer velocity update. Together with advanced imaging algorithms such as RTM, this new flow can significantly improve the image of pre-salt structure. To further improve the pre-salt images, we may have to include
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AAPG Search and Discover Article #90100©2009 AAPG International Conference and Exhibition 15-18 November 2009, Rio de Janeiro, Brazil