Multi-track matching pursuit method, storage medium and terminal based on spatial information index

Abstract

The invention relates to a multi-channel matching tracing method based on spatial information indexing, a storage medium and a terminal. The method comprises the steps of: processing obtained multi-channel signals so as to obtain the best matched atom and the amplitude parameter of the best matched atom; constructing a space time varying atomic library used for decomposing an adjacent channel, wherein the time parameter in the space time varying atomic library is a variable; and, calculating the space time varying atomic library so as to determine the best atom of a preset-channel signal, replacing the time parameter in the space time varying atomic library by the centre time of the best atom, and continuously performing multi-channel searching on a next-channel signal by the replaced space time varying atomic library. According to the multi-channel matching tracing method based on spatial information indexing, the storage medium and the terminal in the invention, the space time varying atomic library is constructed; the amplitude information is used as the optimal atom indication parameter; directional multi-channel searching can be realized; directional multi-channel decomposition on seismic data can be realized; the transverse continuity of the seismic data can be sufficiently utilized; furthermore, the seismic event directivity is considered; and requirements of actual geophysical exploration and development can be well satisfied.

Description

technical field [0001] The invention relates to the field of detection of oil and gas reservoirs, and more specifically relates to a multi-track matching and tracking method based on spatial information index, a storage medium and a terminal. Background technique [0002] The single-trace matching pursuit algorithm decomposes seismic signals trace by trace, which does not take into account the lateral continuity of seismic data, so the order of decomposition has a great influence on the decomposition results, resulting in data noise when decomposing seismic signals. The impact is large, the decomposed atoms are unstable, the resolution of the reconstructed section is low, and the decomposition speed is slow. In view of the shortcomings of the traditional matching pursuit algorithm, experts and scholars at home and abroad have conducted in-depth research on it and proposed many improved optimization algorithms. [0003] The proposal of the multi-trace matching pursuit algori...

AI Technical Summary

Problems solved by technology

The stratigraphic structure of the actual seismic data is complex and changeable, and its event shows a certain directionality. Therefore, only searching for the time-frequency atom that best matches all the seismic traces on the same time slice does not meet the actual needs. The traditional multi-channel The search strategy does not take into account the complex structural background of the subterranean medium, resulting in certain defects in the algorithm when decomposing seismic data of large-angle structures

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