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Collected footprint pressing method 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: 2019-05-21
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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  • Collected footprint pressing method based on morphological component analysis
  • Collected footprint pressing method based on morphological component analysis
  • Collected footprint pressing method based on morphological component analysis

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Embodiment Construction

[0068] In order to make the objectives and technical solutions of the present invention clearer, the following further describes the present invention in detail with reference to the accompanying drawings and specific embodiments. Here, the exemplary embodiments of the present invention and the description thereof are used to explain the present invention, but not as a limitation of the present invention.

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

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

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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, and in particular relates to a method for acquiring footprints in seismic acquisition data. Background technique [0002] The acquisition footprint is generally a periodic amplitude artifact produced in seismic imaging due to the rolling arrangement of the seismic observation system and the incomplete sampling caused by the lateral line separation of the seismic source and the geophone. It can usually be in the time or depth slice of the 3D seismic data observed. In the exploration process of stratum-lithology and other hidden oil and gas reservoirs, in order to meet the needs of complex reservoir prediction, it is necessary to carry out detailed structural interpretation and lithological trap interpretation of seismic data. However, the acquired footprint noise will seriously interfere with the seismic interpretation process, and may even be misjudged as an abnormal ge...

Claims

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Application Information

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Patent Type & Authority Applications(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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