Method for full-bandwidth source deghosting of marine seismic streamer data

摘要

Seismic data recorded in a marine streamer are obtained, sorted as a common receiver gather. 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 source deghosting system of equations. The solution is inverse-transformed back to a space-time domain to provide source deghosted seismic data, which is useful for imaging the earth's subsurface.

主权项

1. A method for converting seismic data recorded from marine streamers into source deghosted seismic data, comprising:
using a programmable computer to perform the following:
sorting the seismic data recorded from the marine streamers into a common receiver gather;using a complex Laplace frequency parameter to transform the seismic data from a space-time domain to a spectral domain;applying an iterative conjugate gradient scheme, using a physically-based preconditioner, to the transformed seismic data, to provide a least squares solution to a normal set of equations for a source deghosting system of equations; andinverse-transforming the solution back to a space-time domain to provide the source deghosted seismic data, useful for imaging the earth's subsurface.