A seismic data processing method and system

一种地震资料、稀疏表示的技术，应用在基于PCA字典和稀疏表示的地震资料处理方法及系统领域，能够解决信号保真性差等问题

Inactive Publication Date: 2019-04-19
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Among them, the deconvolution processing method has artificial assumptions, and when the frequency extension requirements are high, the signal fidelity is poor; the inverse Q filtering processing method requires a relatively accurate equivalent Q value field, and can only deal with the vertical absorption attenuation

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0224] Randomly select 50,000 pairs of different high-resolution and low-resolution image pairs from the training image set, and obtain feature vectors for training to establish an adaptive PCA dictionary. In order to effectively compare the processed image with the input image, and balance the computational efficiency and result quality, the size of the sparse dictionary is fixed at 1024, and the sampling rate is 0.5. Table 1 is the result contrast of the present invention and conventional method. It can be seen from Table 1 that the root mean square error of the seismic image processed by the method of the present invention is obviously reduced, and the peak signal-to-noise ratio is obviously improved.

[0225] Table 1 The present invention and the result contrast of conventional method

[0226]

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PUM

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Abstract

The invention discloses a PCA dictionary and sparse representation-based seismic data processing method. The method comprises the steps of 1, establishing a self-adaptive PCA dictionary D; 2, inputting to-be-processed seismic data x (0), and obtaining a first restored image x (1) based on the adaptive PCA dictionary D; And step 3, taking the first restored image x (1) as to-be-processed seismic data to carry out iteration processing to obtain a final restored image x (k). By using the adaptive PCA dictionary, when the main component of the image set is obtained, other redundant dimensions areomitted, the purpose of dimension reduction is achieved, the processed image is compressed indirectly, meanwhile, more information of the original image is reserved, and therefore the definition of the restored image can be improved.

Description

technical field [0001] The invention relates to the field of seismic signal processing, in particular to a seismic data processing method and system based on PCA dictionary and sparse representation. Background technique [0002] With the gradual deepening of oil and gas exploration and development, the exploration targets are developing in the direction of middle-deep complex fault-block oil reservoirs, lithologic hidden oil reservoirs and stratigraphic oil reservoirs, and the corresponding oil and gas exploration and development are becoming more and more difficult. Therefore, the deepening of oil and gas exploration and development naturally puts forward higher requirements for the accuracy of seismic imaging. Seismic imaging data is an important data for deepening oil and gas exploration and development, and it is very important to improve the accuracy of seismic imaging to meet the needs of oil and gas field exploration and development. The resolution of seismic data i...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06K9/62G06F17/16
CPCG06F17/16G06V10/513G06F18/211G06F18/28G06F18/23213
Inventor 孟黎歌朱凌燕王佳王婷婷
Owner CHINA PETROLEUM & CHEM CORP
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