Seismic data interpolation using a fast generalized Fourier transform

Seismic data interpolation using a fast generalized Fourier transform
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DOI:
10.1190/1.3511525
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发表时间:
2011
期刊:
影响因子:
3.3
通讯作者:
M. Naghizadeh;K. Innanen
M. Naghizadeh;K. Innanen
中科院分区:
地球科学2区
文献类型:
--
作者:
M. Naghizadeh;K. Innanen

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我们找到了一种快速有效的非平稳地震数据插值方法。该方法利用快速广义傅里叶变换(FGFT)来识别非平稳空间信号在每个时间频率上的空间波数演化。FGFT的非冗余性质为这种插值方法带来了巨大的计算优势。接下来使用最小二乘拟合方案来检索代表理想内插数据的最佳FGFT系数。对于规则网格上的随机采样数据,我们寻求FGFT系数的稀疏表示来检索丢失的样本。此外,为了在给定频率下对规则采样的地震数据进行插值,我们使用了一个由低频FGFT系数导出的掩模函数。合成和真实的数据的例子可以用来检查的方法的性能。
We have found a fast and efficient method for the interpolation of nonstationary seismic data. The method uses the fast generalized Fourier transform (FGFT) to identify the space-wavenumber evolution of nonstationary spatial signals at each temporal frequency. The nonredundant nature of FGFT renders a big computational advantage to this interpolation method. A least-squares fitting scheme is used next to retrieve the optimal FGFT coefficients representative of the ideal interpolated data. For randomly sampled data on a regular grid, we seek a sparse representation of FGFT coefficients to retrieve the missing samples. In addition, to interpolate the regularly sampled seismic data at a given frequency, we use a mask function derived from the FGFT coefficients of the low frequencies. Synthetic and real data examples can be used to examine the performance of the method.