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Yang Chingyong (Institute of Petroleum Geophysical Prospecting,CNSPC,Nanjing 210014)  
D seismic survey has made a great contribution to the increment of reserve and producing rate in oil and gas industry. With the decreasement of the cost of acquisition and processing,shortening of cycle time,application and dissemination of full 3D processing and prestack depth migration techniques,and rapid development of computer technology,full 3D seismic interpretation has become a technology to which major efforts have been devoted. Some powerful software companies abroad have developed out a batch of application software in succession,such as 3DVI and VoxCube of Landmark,GeoViz of GeoQuest,and VoxelGeo of Paradigm. These software has been applied and disseminated in hydrocarbon exploration and development. The techniques include spatial automatic tracking,surfaceslice,voxel,coherency cube and 3D visualization. At present,the stress of full 3D seismic interpretation is structural interpretation,rarely involving reservoir interpretation for reservoir parameters and fluid properties,and the techniques are still at the initial phase of development. Many techniques remain to be further developed and perfected,for example,seismic attribute technique,identification,extraction and display of faults in 3D space,automatic division and extraction of subarea.
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