Abstract

The resulting shear wave velocity profiles contain variations in absolute shear wave velocities, but more importantly, contain variations in the relative change in shear wave velocity between sands and shales. The relative changes in shear wave velocity produce significant variations in AVO response of reflections from sand/shale interfaces. The variation in AVO response is greatest for those model layers containing wet sands. The variation in AVO response is smaller for gas sands, as the AVO response is dominated by the decrease in the Poisson’ s ratio of the gas sands.

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