Method of noise removal for cascaded sweep data
First Claim
1. A method for processing seismic data comprising:
- (a) determining a difference for data in a window comprising a portion of a first data segment with data in a corresponding window comprising a portion of a second data segment, wherein said first data segment and said second data segment are selected from a plurality of data segments acquired using a plurality of seismic sweeps; and
(b) changing said data in said first data segment using said data in a corresponding window comprising a portion of a second data segment based on said difference.
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Abstract
The present invention is a method for processing seismic data comprising acquiring seismic data using a sweep sequence including a plurality of cascaded sweep segments. The seismic data include a plurality of data segments and a listen time. The listen is combined with an initial data segment. The seismic data segments are phase shifted to a phase of a target data segment to be denoised (i.e. removal of ambient, harmonic and coherent noise). A difference between the target data segment and the remaining data segments is determined. If the determined difference exceeds a predetermined threshold, data in the target data segment is replaced with data derived from the remaining data segments. The data segments may be stacked to form a new target data segment. The listen time is extracted from the initial data segment.
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Citations
10 Claims
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1. A method for processing seismic data comprising:
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(a) determining a difference for data in a window comprising a portion of a first data segment with data in a corresponding window comprising a portion of a second data segment, wherein said first data segment and said second data segment are selected from a plurality of data segments acquired using a plurality of seismic sweeps; and
(b) changing said data in said first data segment using said data in a corresponding window comprising a portion of a second data segment based on said difference. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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Specification