A frequency‐space 2-D scalar wave extrapolator using extended 25-point finite‐difference operator
A frequency‐space 2-D scalar wave extrapolator using extended 25-point finite‐difference operator
复制标题
DOI：
10.1190/1.1444323
复制
发表时间：
1998-02
期刊：
影响因子：
3.3
通讯作者：
C. Shin;H. Sohn
中科院分区：
文献类型：
--
作者：
C. Shin;H. Sohn
自20世纪80年代以来，用于生成合成地震记录和井间层析成像的有限差分频域建模一直是活跃的研究领域。利用时域有限差分技术生成合成地震记录在波形井间层析成像和地震逆时偏移方面取得了相当大的成功。随着高性能计算机的迅速发展，这成为可能。然而，空间频率（x，ω）有限差分建模技术在成本和计算机内存方面仍然超出了现代超级计算机的能力。因此，有限差分时域建模在勘探地球物理学家中更受欢迎。空间-频率域的一个局限性是最近开发的九点方案仍然要求G，即每个波长的网格点数，为5。该值大于大多数其他数值建模技术（例如，伪谱方案）。...
Finite‐difference frequency‐domain modeling for the generation of synthetic seismograms and crosshole tomography has been an active field of research since the 1980s. The generation of synthetic seismograms with the time‐domain finite‐difference technique has achieved considerable success for waveform crosshole tomography and for wider applications in seismic reverse‐time migration. This became possible with the rapid development of high performance computers. However, the space‐frequency (x,ω) finite‐difference modeling technique is still beyond the capability of the modern supercomputer in terms of both cost and computer memory. Therefore, finite‐difference time‐domain modeling is much more popular among exploration geophysicists. A limitation of the space‐frequency domain is that the recently developed nine‐point scheme still requires that G, the number of grid points per wavelength, be 5. This value is greater than for most other numerical modeling techniques (for example, the pseudospectral scheme). ...