吉林大学学报(地球科学版) ›› 2016, Vol. 46 ›› Issue (6): 1855-1864.doi: 10.13278/j.cnki.jjuese.201606304

• 地球探测与信息技术 • 上一篇    下一篇

Shearlet域稀疏约束地震数据重建

刘成明, 王德利, 胡斌, 王通   

  1. 吉林大学地球探测科学与技术学院, 长春 130026
  • 收稿日期:2016-03-04 出版日期:2016-11-26 发布日期:2016-11-26
  • 通讯作者: 王德利,男(1973),教授,博士生导师,主要从事各向异性介质波场正、反演理论和高精度地震勘探研究,E-mail:wangdeli@jlu.edu.cn E-mail:wangdeli@jlu.edu.cn
  • 作者简介:刘成明,男(1990),博士研究生,主要从事地震数据稀疏约束处理方法的研究,E-mail:liucm1991@qq.com
  • 基金资助:
    国家科技重大专项项目（2011ZX05023-005-008）；国家自然科学基金项目（41374108）

Seismic Data Interpolation Based on Sparse Constraint in Shearlet Domain

Liu Chengming, Wang Deli, Hu Bin, Wang Tong   

  1. College of GeoExploration Science and Technology, Jilin University, Changchun 130026, China
  • Received:2016-03-04 Online:2016-11-26 Published:2016-11-26
  • Supported by:
    Supported by National Science and Technology Major Project (2011ZX05023-005-008) and National Natural Science Foundation of China (41374108)

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摘要： 在地震数据处理流程中，通常对不规则的、稀疏的或者缺失的地震数据进行插值处理，通过插值方法来避免多次波的预测错误和成像假频等现象，使地震数据处理更加精准。Shearlet变换是一种多尺度变换，具有最佳的稀疏性、方向性以及局部化特性。将Shearlet变换与基于Landweber加速下降迭代方法结合起来对地震数据进行插值，在保证求解精度的同时提高了计算效率。信号和噪声在Shearlet域具有不同的分布特点，通过阈值法压制随机噪声，可提高算法的抗噪性。此外，采用jitter采样的方式，更好地压制了假频信息。理论和实际地震数据验证了该方法的有效性。

关键词: Shearlet变换, 插值, 稀疏变换, 压缩感知, jitter采样

Abstract: Seismic data interpolation for the missing traces forms a crucial step in the seismic processing flow. Interpolation result will affect the subsequent migration imaging and the effect of multiple elimination directly. Shearlet transform is a new multi-scale transform with multi-directions, multi-resolutions, and optimal sparse approximation properties. We propose an accelerate iterative Landweber algorithm for seismic data interpolation based on Shearlet transform, ensuring the precision and improving the computational efficiency at the same time. According to the distribution characteristics of signals and noise, the signal-to-noise ratio could be improved by using a threshold method to suppress random noise, improving the anti-noise capability of our algorithm. Moreover, jittered undersampling is adopted to suppress aliasing. A stylized experiment on synthetic as well as field data show the method is effective and robust.

Key words: Shearlet transform, interpolation, sparse transform, compress sensing, jittered undersampling

中图分类号: 

  • P631.4
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