Two-Dimensional Inversion of Full Waveforms Using Simulated Annealing
Two-Dimensional Inversion of Full Waveforms Using Simulated Annealing
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DOI：
10.1061/(asce)gt.1943-5606.0000685
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发表时间：
2012-09
影响因子：
3.9
通讯作者：
K. Tran;D. Hiltunen
中科院分区：
文献类型：
--
作者：
K. Tran;D. Hiltunen
摘要本文提出了一种利用模拟退火和时距域二维弹性波方程的有限差分解来反演二维（2D）全波场的技术。该算法生成所有可能的波类型（体波、表面波等）来模拟复杂的地震波场并与观测数据进行比较。使用合成和实际实验数据集运行的模型说明了反演技术的能力。合成数据的结果证明了在横向不均匀剖面中表征低速层和高速层的潜力，并且实际数据的反演结果与交叉孔、标准渗透测试 N 值和材料测井结果一致。根据所介绍的案例，全局优化与全波形的耦合在计算上是可行的；本文给出的结果在标准笔记本电脑上需要不到 1 天的计算时间。
AbstractThe paper presents a technique to invert two-dimensional (2D) full wavefields using simulated annealing and a finite-difference solution of the 2D elastic wave equation in the time-distance domain. The algorithm generates all possible wave types (body waves, surface waves, etc.) to simulate complex seismic wavefields and for comparison with observed data. Model runs with both synthetic and actual experimental data sets illustrate the capability of the inversion technique. The results from synthetic data demonstrate the potential of characterizing both low- and high-velocity layers in laterally inhomogeneous profiles, and the inversion results from actual data are consistent with the crosshole, standard penetration test N-value, and material log results. Based on the cases presented, the coupling of global optimization with full waveforms is computationally practical; the results presented herein required less than 1 day of computer time on a standard laptop computer.