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首页> 外文期刊>Journal of Applied Geophysics >3D seismic data reconstruction based on complex-valued curvelet transform in frequency domain
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3D seismic data reconstruction based on complex-valued curvelet transform in frequency domain

机译：基于频域复值曲波变换的3D地震数据重建

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摘要

Traditional seismic data sampling must follow the Nyquist Sampling Theorem. However, the field data acquisition may not meet the sampling criteria due to missing traces or limits in exploration cost, causing a prestack data reconstruction problem. Recently researchers have proposed many useful methods to regularize the seismic data. In this paper, a 3D seismic data reconstruction method based on the Projections Onto Convex Sets (POCS) algorithm and a complex-valued curvelet transform (CCT) has been introduced in the frequency domain. In order to improve reconstruction efficiency and reduce the computation time, the seismic data are transformed from the t-x-y domain to the f-x-y domain and the data reconstruction is processed for every frequency slice during the reconstruction process. The selection threshold parameter is important for reconstruction efficiency for each iteration, therefore an exponential square root decreased (ESRD) threshold is proposed. The experimental results show that the ESRD threshold can greatly reduce iterations and improve reconstruction efficiency compared to the other thresholds for the same reconstruction result. We also analyze the antinoise ability of the CCT-based POCS reconstruction method. The example studies on synthetic and real marine seismic data showed that our proposed method is more efficient and applicable. (C) 2014 Elsevier B.V. All rights reserved.
机译：传统的地震数据采样必须遵循奈奎斯特采样定理。但是，由于缺少踪迹或勘探成本的限制，现场数据采集可能不符合采样标准，从而导致叠前数据重建问题。最近，研究人员提出了许多有用的方法来规范地震数据。本文在频域上介绍了一种基于凸集投影（POCS）算法和复值曲波变换（CCT）的3D地震数据重建方法。为了提高重建效率并减少计算时间，将地震数据从t-x-y域转换为f-x-y域，并在重建过程中针对每个频率切片处理数据重建。选择阈值参数对于每次迭代的重建效率很重要，因此提出了指数平方根减小（ESRD）阈值。实验结果表明，与相同重建结果的其他阈值相比，ESRD阈值可以大大减少迭代并提高重建效率。我们还分析了基于CCT的POCS重建方法的抗噪能力。对实际和真实的海洋地震数据进行的实例研究表明，我们提出的方法更加有效和适用。 （C）2014 Elsevier B.V.保留所有权利。

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