Diffraction imaging for seal evaluation using ultra high resolution 3D seismic data

To evaluate the ability for seal intervals to retain fluids in underlying reservoirs, we performed diffraction analysis of the shallow intervals (above 200 m) imaged by high-resolution P-Cable seismic data. We isolated diffractions from the P-Cable data and analyzed diffraction strength across the section, and observed both narrow-linear and broad-sinuous zones of high diffractivity. We interpreted these broad regions to be a response to variable fluid composition saturation including hydrocarbons, which may have escaped from underlying reservoirs.