REVERSE TIME MIGRATION BACK-SCATTERING NOISE REMOVAL USING DECOMPOSED WAVEFIELD DIRECTIVITY
First Claim
1. A computer-implemented method for generating images of a subsurface region, the method comprising:
- decomposing two or more wavefields to produce two or more corresponding decomposed wavefields, wherein the two or more wavefields include a source wavefield and a receiver wavefield;
determining directivity of the two or more decomposed wavefields to produce corresponding direction-dependent components of the two or more decomposed wavefields;
cross-correlating one or more of the direction-dependent components of one or more decomposed source wavefields with one or more of the direction-dependent components of one or more decomposed receiver wavefields; and
generating an image of the subsurface region based on the cross-correlation.
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Abstract
Images of a subsurface region may be generated in conjunction with reverse time migration with reduced or no backscattering noise. Two or more wavefields may be decomposed to produce two or more corresponding decomposed wavefields. The two or more decomposed wavefields may include a source wavefield and a receiver wavefield. Directivity of the two or more decomposed wavefields may be determined to produce corresponding direction-dependent components of the two or more decomposed wavefields. One or more of the direction-dependent components of one or more decomposed source wavefields may be cross-correlated with one or more of the direction-dependent components of one or more corresponding decomposed receiver wavefields. An image of the subsurface region may be generated based on the cross-correlation.
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Citations
15 Claims
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1. A computer-implemented method for generating images of a subsurface region, the method comprising:
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decomposing two or more wavefields to produce two or more corresponding decomposed wavefields, wherein the two or more wavefields include a source wavefield and a receiver wavefield; determining directivity of the two or more decomposed wavefields to produce corresponding direction-dependent components of the two or more decomposed wavefields; cross-correlating one or more of the direction-dependent components of one or more decomposed source wavefields with one or more of the direction-dependent components of one or more decomposed receiver wavefields; and generating an image of the subsurface region based on the cross-correlation. - View Dependent Claims (2, 3, 4, 5)
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6. A system configured to generate images of a subsurface region, the system comprising:
one or more processors configured to execute computer program modules, the computer program modules comprising; a wavefield decomposition module configured to decompose two or more wavefields to produce two or more corresponding decomposed wavefields, wherein the two or more wavefields include a source wavefield or a receiver wavefield; a wavefield directivity determination module configured to determine directivity of the two or more decomposed wavefields to produce corresponding direction-dependent components of the two or more decomposed wavefields; a cross-correlation module configured to cross-correlate one or more of the direction-dependent components of one or more decomposed source wavefields with one or more of the direction-dependent components of one or more decomposed receiver wavefields; and an image generation module configured to generate an image of the subsurface region based on the cross-correlation performed by the cross-correlation module. - View Dependent Claims (7, 8, 9, 10)
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11. A computer-readable storage medium having instructions embodied thereon, the instructions being executable by a processor to perform a method for generating images of a subsurface region, the method comprising:
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decomposing two or more wavefields to produce two or more corresponding decomposed wavefields, wherein the two or more wavefields include a source wavefield and a receiver wavefield; determining directivity of the two or more decomposed wavefields to produce corresponding direction-dependent components of the two or more decomposed wavefields; cross-correlating one or more of the direction-dependent components of one or more decomposed source wavefields with one or more of the direction-dependent components of one or more decomposed receiver wavefields; and generating an image of the subsurface region based on the cross-correlation. - View Dependent Claims (12, 13, 14, 15)
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Specification