Attenuation of OBN multiples by up/down deconvolution and down/down deconvolution

For ocean bottom node, multiples caused by free-surface interfere with the imaging of seismic area seriously. Due to the seismic waves oscillate repeatedly between reflective interfaces, multiples are generated. These multiple can reduces the quality of seismic profiles and effect the following processing and interpretation. This paper introduces the up-down deconvolution (UDD) and down-down deconvolution (DGD) methods for attenuating the multiples in OBN data. This method is completely data-driven and has the advantages of quick operation and high computational efficiency. The effectiveness of these methods is demonstrated by using a synthetic data and a real field data. The results reveal that the UDD and DGD can successfully attenuate the surface related multiples, improve the quality of imaging.