1887
Volume 72, Issue 7
  • E-ISSN: 1365-2478

Abstract

Abstract

The accuracy of fault interpretation is generally influenced by the quality of seismic images. Because of the blurring effect of the migration process, faults with small throws may not be clearly imaged in seismic images, which will impose limitations on the fault detection. To address this issue, we propose a deep learning‐based method to enhance faults in poststack seismic images. We generate abundant training samples by convolving the three‐dimensional point‐spread functions with the noisy reflectivity models. The corresponding labels are synthesized using the one‐dimensional seismic wavelet convolution method, simulating conditions with perfect illumination. To train the network for optimal performance, we investigate the impact of different loss functions. Ultimately, we employ a mixed loss function combining structural similarity index measure and gradient difference loss, since the gradient difference loss focuses more on geological edge information, and the structural similarity index measure possesses excellent image perceptual capability and optimization property. Results from one synthetic seismic image and three real seismic data demonstrate that our proposed method can effectively restore the sharpness of fault surfaces, particularly for faults with small displacements. Compared to the structural smoothing method, the network we trained achieves optimal fault enhancement. Furthermore, coherence‐based fault images indicate that seismic images enhanced using our method can improve the accuracy of fault interpretation and yield more continuous fault maps.

© 2024 European Association of Geoscientists & Engineers. © 2024 European Association of Geoscientists & Engineers.
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2024-08-23
2025-11-11

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Enhancing the seismic response of faults by using a deep learning‐based method
Geophysical Prospecting 72, 2615 (2024); https://doi.org/10.1111/1365-2478.13549
/content/journals/10.1111/1365-2478.13549
/content/journals/10.1111/1365-2478.13549
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  • Article Type: Research Article
Keyword(s): data processing; deep learning; fault enhancement; reservoir geophysics; seismic interpretation; seismics

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