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A Method of Acquisition and Suppression of Footprints Based on Morphological Component Analysis

A technology for analyzing morphological components and collecting footprints. It is applied in seismic signal processing and other directions, and can solve problems such as poor portability and inability to process data.

Active Publication Date: 2020-07-28
XI AN JIAOTONG UNIV
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Problems solved by technology

[0007] It can only be used for newly collected data, and cannot process previously collected data; different designs need to be made for different collection systems, and the portability is poor

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  • A Method of Acquisition and Suppression of Footprints Based on Morphological Component Analysis
  • A Method of Acquisition and Suppression of Footprints Based on Morphological Component Analysis
  • A Method of Acquisition and Suppression of Footprints Based on Morphological Component Analysis

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Embodiment Construction

[0068] In order to make the purpose and technical solution of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments. Here, the exemplary embodiments of the present invention and their descriptions are used to explain the present invention, but not to limit the present invention.

[0069] In an embodiment of the present invention, a method for suppressing collected footprints based on morphological component analysis is proposed, including the following steps:

[0070] Step 101: Construct a two-dimensional local discrete cosine transform according to the morphological characteristics of footprints collected in seismic records of slices along slices or isochronous slices of the three-dimensional seismic data volume, and combine it with two-dimensional stationary wavelet transforms to form an over-complete dictionary, and determine two-dimensional The decomposition seri...

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Abstract

The invention discloses a collected footprint pressing method based on morphological component analysis, which comprises the following steps of: 101, acquiring footprint waveform morphological characteristics in seismic records of edge-layer slices or isochronous slices of a three-dimensional seismic data body to construct two-dimensional local discrete cosine transform, and combining the two-dimensional local discrete cosine transform with two-dimensional stable wavelet transform to form an over-complete dictionary; 102, through a mode of executing original data of the seismic record signalslayer by layer, utilizing a morphological component analysis-based method to perform preliminary pressing of the collected footprints in each edge layer slice or isochronous slice; 103, determining the low intercept frequency of the two-dimensional local discrete cosine transform; 104, repeating the steps 102-103 until all slice data are processed, performing signal-to-noise separation by using amorphological component analysis-based method, suppressing and collecting footprint noise, and finally realizing suppression of the collected footprint noise in the three-dimensional seismic data body. The acquisition footprint suppression is carried out on the three-dimensional seismic data body by utilizing the method, so that the aim of improving the signal-to-noise ratio of the seismic data isfulfilled.

Description

technical field [0001] The invention belongs to the technical field of data processing in seismic exploration, in particular to a method for suppressing footprints collected in seismic data collection. Background technique [0002] The acquisition footprint is generally a periodic amplitude artifact in seismic imaging caused by the rolling arrangement of the seismic observation system and the incomplete sampling caused by the lateral line interval of the source and receiver, and can usually be found in time or depth slices of 3D seismic data observed. In the exploration process of subtle oil and gas reservoirs such as stratigraphy and lithology, in order to meet the requirements of complex reservoir prediction, it is necessary to carry out fine structural interpretation and lithological trap interpretation of seismic data. However, the acquisition footprint noise will seriously interfere with the seismic interpretation process, and may even be misjudged as a geological stru...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01V1/30
Inventor 陈文超王伟刘达伟师振盛陈建友庞岳峰李立三
Owner XI AN JIAOTONG UNIV
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