Abstract

In conventional 3D seismic survey data is collected at areal grid, two dimensions at the surface (x, y) together with depth (d) gives 3D seismic image of the subsurface. Compared to 2D seismic surveys 3D seismic survey provides better signal to noise ratio, accurate subsurface imaging, increased confidence in reservoir delineation, better estimation of Hydrocarbons. However determination of fracture density and orientation, lithological information, estimation of fluid content, gas identification is not possible just with 3D survey, Multi-component survey that records both P and S wave provides much information about all these. Multi component survey gives both P and S wave sections, combined interpretation of these two will give better characterization of subsurface geology. In processing of both P and S wave data statics play very important role. These statics are calculated from uphole survey. Uphole survey to calculate shear statics is done by 3C sensor (Vector-seis) and detonator as source. In this paper it is studied that offset required to faithfully map the near surface layers and calculate accurate shear statics in Multicomponent uphole data acquisition.