Seismic Data Processing
First Claim
1. A method for processing seismic data, the method comprising:
- a. obtaining a plurality of initial subsurface images, wherein each of the initial subsurface images is generated using a unique random set of encoding functions;
b. decomposing each of the initial subsurface images into components;
c. identifying a set of components comprising one of (i) components having at least one substantially similar characteristic across the plurality of initial subsurface images, and (ii) components having substantially dissimilar characteristics across the plurality of initial subsurface images; and
d. generating an enhanced subsurface image using the set of components identified in step c.
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Abstract
Provided is a method for processing seismic data. One exemplary embodiment includes the steps of obtaining a plurality of initial subsurface images; decomposing each of the initial subsurface images into components; identifying a set of components comprising one of (i) components having at least one substantially similar characteristic across the plurality of initial subsurface images, and (ii) components having substantially dissimilar characteristics across the plurality of initial subsurface images; and generating an enhanced subsurface image using the identified set of components. Each of the initial subsurface images is generated using a unique random set of encoding functions.
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Citations
18 Claims
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1. A method for processing seismic data, the method comprising:
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a. obtaining a plurality of initial subsurface images, wherein each of the initial subsurface images is generated using a unique random set of encoding functions; b. decomposing each of the initial subsurface images into components; c. identifying a set of components comprising one of (i) components having at least one substantially similar characteristic across the plurality of initial subsurface images, and (ii) components having substantially dissimilar characteristics across the plurality of initial subsurface images; and d. generating an enhanced subsurface image using the set of components identified in step c. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15)
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16. A method for processing seismic data, the method comprising:
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a. obtaining a plurality of SS-RTM subsurface images, wherein each of the SS-RTM subsurface images is generated using a unique random unit-magnitude set of encoding functions; b. decomposing each of the plurality of SS-RTM subsurface images into curvelet coefficients; c. averaging the curvelet coefficients to generate a preliminary signal curvelet coefficient estimate; d. computing a variance of a subset of the curvelet coefficients to determine a noise level in the preliminary signal curvelet coefficient estimate; e. attenuating noise in the curvelet coefficients using the determined noise level and the preliminary signal curvelet coefficient estimate to generate attenuated curvelet coefficients; and f. performing an inverse curvelet transform on the attenuated curvelet coefficients to generate an enhanced SS-RTM image. - View Dependent Claims (17)
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18. A method for computing a gradient of a cost function associated with seismic data, the method comprising:
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a. generating a plurality of gradients of objective functions computed using unique sets of random reciprocal encoding functions; b. decomposing each of the gradients into components; c. identifying a set of components having at least one substantially similar characteristic across the plurality of gradients; and d. generating an enhanced gradient using the set of components identified in step c.
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Specification