Third-generation coherence cube algorithm fast realization method based on recursion and power method

Abstract

The invention discloses a third-generation coherence cube algorithm fast realization method based on recursion and a power method. The recursion and the powder method for selecting an initial vector are used for quickly realizing a third-generation coherence cube algorithm. By utilizing the time / space recursion, the computation for establishing a covariance matrix can be greatly reduced; and when the covariance matrix is characteristically decomposed to get a main characteristic value, the initial vector of the power method is reasonably selected, so that the iteration times for calculating the main characteristic value of the covariance matrix by utilizing the power method can be reduced; and therefore, the computation of the third-generation coherence cube algorithm is greatly reduced, the computation time is reduced, and the error is small.

Description

Technical field [0001] The invention belongs to the field of geophysical prospecting, and relates to a discontinuity detection method, in particular to a fast realization method of the third-generation coherent volume algorithm based on the recursion and power method. Background technique [0002] Coherence cube technology is a powerful seismic attribute interpretation technology developed in recent years, which can greatly shorten the interpretation period of 3D seismic data. The application of three-dimensional coherence technology can determine the spatial distribution of faults and the lithological changes of the target layer, and the application of coherence cube technology can judge the quality of data collection and processing. [0003] In 1995, Bahorich et al. published the coherence cube algorithm based on normalized channel cross-correlation (referred to as the first-generation coherence cube algorithm) that they developed during their work at Amoco. Although the technolo...

AI Technical Summary

Problems solved by technology

[0006] The third-generation coherent volume algorithm has high resolution and good anti-noise ability, but its huge amount of calculation limits its large-scale application in the industry

Various improved algorithms proposed on the basis of the third-generation coherent volume algorithm have achieved relatively good application results, but the problem of the huge amount of calculation of the third-generation coherent volume algorithm has not been resolved.

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