IS-7 DISCRIMINATING NEAR SURFACE EFFECTS FROM SIGNAL VIA AZIMUTHAL OFFSET SAMPLING IN LAND 3D ACQUISITION DESIGN AND PROCESSING 1 W. GOODWAY 1 D. COOPER 1 S. CHEADLE 2 R. KENDALL 2 and A. HAASE 3 1 PanCanadian Petroleum 150-9th Avenue S.W. PO Box 2850 Calgary Alta T2P 2S5 Canada 2 Veritas GeoServices 3 Geo-X Systems INTRODUCTION Ensuring comparable land 3D to 2D quality requires sampling a four dimensional spatial wavefield (shots receivers in x y) at a comparable density to a 2D wavefield in two dimensions (linear shots receivers in x). As this density of shots and receivers is cost


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