Deep Water Prestack Imaging with Primaries and Multiples

This paper discusses a deep water application of imaging of both primaries and multiples using the up and down-going wavefields obtained by processing dual-sensor towed streamer data. Seismic images are obtained by downward continuing the up and down-going wavefields and applying either cross-correlation of deconvolution imaging conditions. A shot profile framework is used to create depth images of primaries, multiples as a signal, and multiples as noise. The imaged multiple noise is then available for adaptive subtraction from the reflector images of the primaries and multiples. The imaging conditions include the generation of subsurface offset gathers, which are subsequently transformed to angle gathers. The gathers provide input for further offset or angle dependent processing.