Method and system for deghosting
AssigneePGS Americas, Inc.
InventorsJacob T. Fokkema, Peter M. van den Berg
Life of this patent
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Abstract
In one embodiment of the present invention, a method for processing a scattered acoustic wavefield is provided. The scattered acoustic wavefield is received by at least two receivers. These receivers are offset and located at approximately the same depth. The method comprises transforming the scattered acoustic wavefield to the frequency domain. The method also comprises transforming the scattered acoustic wavefield from the frequency domain to the spectral domain. The method also comprises deghosting the scattered acoustic wavefield in the spectral domain. The method further comprises transforming the substantially deghosted transformed acoustic wavefield to the space-time domain.
Claims70
A method for processing a scattered acoustic wavefield, at least a portion of which is received by at least two receivers, which are offset and located approximately at the same depth, the method comprising:
- transforming the scattered acoustic wavefield to the frequency domain;
- transforming the scattered acoustic wavefield from the frequency domain to the spectral domain;
- deghosting the scattered acoustic wavefield in the spectral domain;
- and
- transforming the substantially deghosted acoustic wavefield to the space-time domain.
A method for processing a scattered acoustic wavefield at least a portion of which is received by at least a first set of two receivers and a second set of two receivers, wherein the first set of two receivers are offset at substantially a first depth which is vertically offset from the a second set of two receivers which are offset at substantially a second depth, the method comprising:
- transforming the scattered acoustic wavefield received at the first depth to the frequency domain;
- transforming the scattered acoustic wavefield received at the second depth to the frequency domain;
- transforming the scattered acoustic wavefield received at the first depth from the frequency domain to the spectral domain;
- transforming the scattered acoustic wavefield received at the second depth from the frequency domain to the spectral domain;
- generating a substantially deghosted scattered acoustic wavefield in the spectral is domain;
- transforming the substantially deghosted scattered acoustic wavefield to the space-time domain.
A system for processing a scattered acoustic wavefield, at least a portion of which is received by at least two receivers, which are offset and located at approximately the same depth, the method comprising:
- means for transforming the scattered acoustic wavefield to the frequency domain;
- means for transforming the scattered acoustic wavefield from the frequency domain to the spectral domain;
- means for deghosting the scattered acoustic wavefield in the spectral domain;
- and
- means for transforming the substantially deghosted acoustic wavefield to the space-time domain.
A system for processing a scattered acoustic wavefield at least a portion of which is received by at least a first set of two receivers and a second set of two receivers, wherein the first set of two receivers are offset at substantially a first depth which is vertically offset from at least a second set of two receivers which are offset at substantially a second depth, the system comprising:
- means for transforming the scattered acoustic wavefield received at the first depth to the frequency domain;
- means for transforming the scattered acoustic wavefield received at the second depth to the frequency domain;
- means for transforming the scattered acoustic wavefield received at the first depth from the frequency domain to the spectral domain;
- means for transforming the scattered acoustic wavefield received at the second depth from the frequency domain to the spectral domain;
- means for generating a substantially deghosted scattered acoustic wavefield in the spectral domain;
- and
- means for transforming the substantially deghosted scattered acoustic wavefield to the space-time domains.
An apparatus for processing a scattered acoustic wavefield, at least a portion of which is received by at least two receivers offset and located at approximately the same depth comprising:
- a frequency domain transformer;
- a spectral domain transformer;
- a deghoster;
- and
- a space-time domain transformer.
An apparatus for processing a scattered acoustic wavefield received by at least a first set of two receivers and a second set of two receivers, wherein the first set of two receivers are offset at substantially a first depth which is vertically offset from at least a second set of two receivers which are offset at substantially a second depth, the apparatus comprising:
- a first depth frequency domain transformer;
- a second depth frequency domain transformer;
- a first depth spectral domain transformer;
- a second depth spectral domain transformer;
- a deghoster;
- and
- a space-time domain transformer.
Dependencies are inferred from the claim text.