Patent ID: 9360576
Filing Date: 2016-06-07
CPC Classification: G01V

Claim Text:
1. A method for deghosting seismic data from a marine seismic survey, the method comprising: obtaining the seismic data from the marine seismic survey, wherein a source for the marine seismic survey comprises multiple sub-sources towed at two or more different depths and fired at distinct fire-time delays; sorting the seismic data into common receiver gathers; transforming the common receiver gathers from a space-time domain that includes horizontal source coordinates to a frequency-wavenumber domain that includes horizontal wavenumbers; constructing a matrix operator for a selected frequency; applying an inversion procedure to a system of equations based on the matrix operator to generate source-deghosted seismic data at the selected frequency; changing the selected frequency and repeating said constructing and said applying for a range of frequencies; transforming the source-deghosted seismic data from the frequency-wavenumber domain to the space-time domain; and using the source-deghosted seismic data for determining structures of a subsurface rock formation.