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Multiscale Data-Driven Seismic Full-Waveform Inversion With Field Data Study
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DOI：10.1109/TGRS.2021.3114101.png)
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Abstract
En 中文
Seismic full-waveform inversion (FWI), which uses iterative methods to estimate high-resolution subsurface models from seismograms, is a powerful imaging technique in exploration geophysics. In recent years, the computational cost of FWI has grown exponentially due to the increasing size and resolution of seismic data. Moreover, it is a nonconvex problem and can encounter local minima due to the limited accuracy of the initial velocity models or the absence of low frequencies in the measurements. To overcome these computational issues, we develop a multiscale data-driven FWI method based on fully convolutional networks (FCNs). In preparing the training data, we first develop a real-time style transform method to create a large set of synthetic subsurface velocity models from natural images. We then develop two convolutional neural networks with encoder-decoder structures to reconstruct the low- and high-frequency components of the subsurface velocity models, separately. To validate the performance of our data-driven inversion method and the effectiveness of the synthesized training set, we compare it with conventional physics-based waveform inversion approaches using both synthetic and field data. These numerical results demonstrate that, once our model is fully trained, it can significantly reduce the computation time and yield more accurate subsurface velocity models in comparison with conventional FWI.
Keywords:
Data models
Training
Computational modeling
Numerical models
Physics
Mathematical models
Image reconstruction
Data augmentation
multiscale analysis
scientific deep learning
seismic full-waveform inversion (FWI)
style transfer
Journal
IF:
8.6
Papers:
2.1W
Citations:
10.7W