“…The main issues are Denoise, De-signature, De-ghosting, De-multiple and Deabsorption or generally labelled as the "5 D's of processing". The processing solutions are described in the 2014 SEG conference paper (Zhou, J et al, 2014). Eventually, a full PreSDM for the entire survey including merging of data from the adjacent conventional 3D surveys was carried out by the contractor and delivered on time.…”