Prestack seismic data regularization using a time-variant anisotropic Radon transform
Prestack seismic data regularization using a time-variant anisotropic Radon transform
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DOI：
10.1088/1742-2132/13/4/462
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发表时间：
2016-06
影响因子：
1.4
通讯作者：
X. Gong;Shuang Yu;Shengchao Wang
中科院分区：
文献类型：
--
作者：
X. Gong;Shuang Yu;Shengchao Wang
Radon变换在地震资料处理中得到了广泛的应用。本文提出了一种稀疏时变各向异性Radon变换（ART），用于叠前地震数据的正则化和插值。通过引入非椭圆参数η，ART比其他常用的RT具有更精确的积分路径，从而在垂直横观各向同性VTI介质或大时差地震道集的情况下产生更好的能量聚焦Radon面元。为了提高Radon面元的稀疏性，将RT转化为l1-l2范数反演问题，并采用快速迭代收缩阈值算法求解稀疏约束反演问题.在一般合成VTI介质中，ART的重建结果与时不变的频时混合抛物RT和时变双曲RT相比，具有最好的重建效果和最小的重建误差。另一个海上实例进一步证明了ART用于叠前地震数据正则化的有效性和鲁棒性。
The Radon transform (RT) has been widely used in seismic data processing. In this paper, we develop a sparse time-variant anisotropic Radon transform (ART) to regularize and interpolate the prestack seismic data. By introducing the anelliptical parameter η, the ART has a more accurate integral path than other widely used RTs, which produces a better energy-focused Radon panel in the case of a vertical transverse isotropy VTI medium or seismic gather with a large moveout. To promote the sparsity of the Radon panel, the RT is realized as a l 1–l 2 norm inversion problem, and the fast iterative shrinkage thresholding algorithm is imposed to solve this sparsity-constrained inversion problem. Compared with the time-invariant parabolic RT in the mixed frequency-time domain and time-variant hyperbolic RT, the reconstructed result of the ART has the best performance and the least reconstruction error in a general synthetic VTI medium. Another field marine example further demonstrates that the ART is effective and robust for prestack seismic data regularization.