Patent ID: 9651695
Date: 2017-05-16
CPC Classifications: G01V

Claim:
1. A technological process for identifying a potential subsurface structure below a body of water, the technological process comprising: obtaining three-dimensional seismic sensor data, constructing up-going and down-going wavefields from the three-dimensional seismic sensor data by applying wavefield separation, wherein the up-going and down-going wavefields comprise multiples wavefields; extrapolating the up-going and down-going wavefields to a reflector surface below a water bottom; applying an imaging condition at the reflector surface to generate images that include information from the multiples wavefields; constructing angle gathers, where each angle gather is constructed by gathering the images generated using the multiples wavefields for a range of illumination angles; filtering the angle gathers to mute far angle noise in the angle gathers; and stacking the angle gathers to composite a stacked image for identifying the potential subsurface structure below the water bottom to aid in the identification of hydrocarbons for production.