A-16 ANALYSIS OF 3-D ACQUISITION GEOMETRIES WITH FOCAL BEAMS A.W.F. VOLKER G. BLACQUIÈRE and A.J. BERKHOUT Abstract 1 The amplitude accuracy of a seismic acquisition geometry is strongly dependent on the source and detector configuration. The concept of focal beam analysis is an ideal starting point to understand the relation between the source-detector geometry and the amplitude accuracy observed in a 3-D image. In this paper the emphasis is on the study of the dependency of the focal beams on the subsurface location. The continuity of the target point ‘illumination’ plays a vital role in achieving a small acquisition footprint.


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