Full-azimuth high-density (FA HD) seismic surveys are shot from 2005, and their advantages in reservoir characterization and seismic imaging have been demonstrated in a number of recent publications. In accordance with the principles of G.Vermeer, the grids of shot and receiver points should be equivalent, but a FA HD survey can be planned and shot in different ways: using a square template and a single source or narrow template and multiple sources. The latter configuration is more suitable for shooting high-productivity surveys, preferably in open terrain conditions. In case of ecologically sensitive and restricted access areas, new technical solutions have been recently offered, such as a combination of cable-based and cable-less recording equipment


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