Sensitivity to errors in migration velocities

From the point of view of the attenuation of the multiples, it is important that the migration velocities be accurate enough for the primaries to be flat and the multiples to exhibit residual moveout in ADCIGs. This is likely to be the case for water-bottom and peg-leg multiples since water velocity is very different from sediment velocity, but may not be so for internal multiples. Therefore, the method is likely to be successful in attenuating water-bottoms and peg-leg multiples even if there are small errors in the estimation of the migration velocity field. Attenuation of internal multiples will require more accurate migration velocities.