Optimized random subsampling and data reconstruction in seismic exploration of sandstone-type uranium deposits based on compressed sensing
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First author:HUANG Yucheng,male,born in 1989,engineer,PhD,focusing on seismic signal analysis,data processing and interpretation. E-mail:hyc013148@163.com. |
Received date: 2025-02-21
Revised date: 2025-03-16
Online published: 2025-10-24
Supported by
China National Nuclear Corporation Young Talent Project(物QNYC2203)
Excessively high acquisition cost is one of the main factors restricting the large-scale application of seismic exploration methods in geophysical prospecting of sandstone-type uranium deposits. Compressed sensing theory can achieve low-cost seismic data acquisition through compressed measurement and sparse reconstruction, thereby improving the economic benefits of seismic exploration methods for sandstone-type uranium deposits. In practical operations, the design of the measurement matrix in compressed sensing theory, that is, the quality of the subsampling method, is one of the keys to the success or failure of seismic data reconstruction. In this paper, the improved piecewise random subsampling method is combined with the edge-preserving piecewise random subsampling method,and an optimized edge-preserving piecewise random subsampling method is proposed. Through the Gram matrix analysis under different decimation ratio parameter conditions, forward-modeling data comparison and the real seismic data application of sandstone-type uranium deposits in the Songliao basin, it is shown that the optimized subsampling method proposed in this study has the best comprehensive performance and can be used as an effective method for random subsampling in seismic exploration of sandstone-type uranium deposits, which can provide a good data basis for subsequent sparse recovery.
HUANG Yucheng , WU Qubo , KONG Liyun , LI Ziwei , QIAO Baoping , CAO Chengyin , PAN Ziqiang , HUANG Weichuan . Optimized random subsampling and data reconstruction in seismic exploration of sandstone-type uranium deposits based on compressed sensing[J]. World Nuclear Geoscience, 2025 , 42(2) : 317 -328 . DOI: 10.3969/j.issn.1672-0636.2025.02.008
图3 不同欠采样方法测量矩阵(抽稀百分比为50 %)a—规则欠采样;b—纯随机欠采样;c—抖动欠采样;d—分段随机欠采样;e—改进的分段随机欠采样;f—优化的边缘保持分段随机欠采样。 Fig. 3 Measurement matrices of different subsampling methods (with the trace decimation factor η=50 %) a-Regular subsampling;b-Pure random subsampling;c-Jittered subsampling;d-Piecewise random subsampling;e-Modified piecewise random subsampling;f-Optimized edge-preserving piecewise random subsampling. |
图4 不同欠采样方法Gram矩阵(抽稀百分比为50 %)频谱泄露对比a—规则欠采样;b—纯随机欠采样;c—抖动欠采样;d—分段随机欠采样;e—改进的分段随机欠采样;f—优化的边缘保持分段随机欠采样。 Fig. 4 Gram matrices with spectra leakage of different subsampling methods (with the trace decimation factor η=50 %) a-Regular subsampling;b-Pure random subsampling;c-Jittered subsampling;d-Piecewise random subsampling;e-Modified piecewise random subsampling;f-Optimized edge-preserving piecewise random subsampling. |
图6 不同欠采样方法得到的抽稀剖面(抽稀百分比为50 %):a—规则欠采样;b—纯随机欠采样;c—抖动欠采样;d—分段随机欠采样;e—改进的分段随机欠采样;f—优化的边缘保持分段随机欠采样。 Fig. 6 Decimated shot gather through different subsampling methods (with the trace decimation factor η=50 %): a-Regular subsampling;b-Pure random subsampling;c-Jittered subsampling;d-Piecewise random subsampling;e-Modified piecewise random subsampling;f-Optimized edge-preserving piecewise random subsampling. |
图7 不同欠采样方法得到的重建剖面(抽稀百分比为50 %):a—规则欠采样;b—纯随机欠采样;c—抖动欠采样;d—分段随机欠采样;e—改进的分段随机欠采样;f—优化的边缘保持分段随机欠采样。 Fig. 7 Reconstructed section from decimation through different subsampling methods (with the trace decimation factor η=50 %) a-Regular subsampling;b-Pure random subsampling;c-Jittered subsampling;d-Piecewise random subsampling;e-Modified piecewise random subsampling;f-Optimized edge-preserving piecewise random subsampling. |
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