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第一作者:黄昱丞,男,1989年生,工程师,博士,主要从事地震信号分析、数据处理与解释方面研究。E-mail:hyc013148@163.com |
收稿日期: 2025-02-21
修回日期: 2025-03-16
网络出版日期: 2025-10-24
基金资助
中核集团青年英才项目(物QNYC2203)
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)
采集成本偏高是制约地震勘探方法在砂岩型铀矿地球物理勘查中大规模应用的主要因素之一。压缩感知理论可以通过压缩测量与稀疏重建的方式实现低成本地震数据采集,从而提高砂岩型铀矿地震勘探方法的经济效益。实际操作中,压缩感知理论中测量矩阵的设计,即欠采样方法的优劣,是地震数据重建成败的关键之一。将改进的分段随机欠采样方法与边缘保持分段随机欠采样方法相结合,提出一种优化的边缘保持分段随机欠采样方法。结合不同抽稀比例参数条件下的Gram矩阵分析、正演模拟数据对比与松辽盆地砂岩型铀矿地震数据实际应用效果表明,本研究提出的优化欠采样方法具有最佳的综合性能,可以作为一种用于砂岩型铀矿地震勘探随机欠采样的有效方法,能够为后续的稀疏重建提供良好的数据基础。
关键词: 砂岩型铀矿地震勘探; 压缩感知; 优化的边缘保持分段随机欠采样; 稀疏重建
黄昱丞 , 吴曲波 , 孔丽云 , 李子伟 , 乔宝平 , 曹成寅 , 潘自强 , 黄伟传 . 基于压缩感知的砂岩型铀矿地震勘探优化随机欠采样与数据重建[J]. 世界核地质科学, 2025 , 42(2) : 317 -328 . DOI: 10.3969/j.issn.1672-0636.2025.02.008
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.
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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