Abstract

The attenuation of multiple reflections in marine seismic data has been a high priority in seismic industry for many years. Much partial solution exists that are able to tackle the problem in particular circumstances. There is however no method or group of methods that work in all area. Multiple removal, algorithms have been based on two differentiating properties i.e. moveout and predictability. Radon transform seismic data into a domain where multiples and primaries are readily distinguishable and can be separated. This separation allows multiples energy to be easily removed prior to transforming the data back into T-X domain. Algorithms of radon filter relay on residual moveout to discriminate multiples from primaries. Velocities must be picked with sufficient accuracy to distinguish primary energy from slightly slower multiple energy. Radon filter requires no knowledge of the multiple generating mechanism and attenuates multiples at all offsets equally. It also works fairly well with non-uniform geometries. Radon filter is still effective when primaries and multiples are co-incident at near offsets in T-X domain. A minimum moveout of 30 from near trace to far trace is required for this technique to be effective. A greater moveout differential increases its effectiveness