Method for full-bandwidth deghosting of marine seismic...

Details Method for full-bandwidth deghosting of marine seismic... Method for full-bandwidth deghosting of marine seismic...

G - Physics

01

V

G01V 1/36 (2006.01) G01V 1/32 (2006.01)

Patent

CA 2719389

Seismic data recorded in a marine streamer are obtained, with the seismic data being representative of characteristics of subsurface earth formations and acquired by deployment of a plurality of seismic receivers overlying an area of the subsurface earth formations to be evaluated, the seismic receivers generating at least one of an electrical and optical signal in response to seismic energy. A complex Laplace frequency parameter is used to transform the seismic data from a space-time domain to a spectral domain. An iterative conjugate gradient scheme, using a physically-based preconditioner, is applied to the transformed seismic data, to provide a least squares solution to a normal set of equations for a deghosting system of equations. The solution is inverse-transformed back to a space-time domain to provide deghosted seismic data, which is useful for imaging the earth's subsurface.

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