Source location using physics-informed neural networks with hard constraints

Xinquan Huang*, Tariq Alkhalifah

*Corresponding author for this work

Research output: Contribution to conferencePaperpeer-review

1 Scopus citations

Abstract

Locating subsurface seismic sources is crucial to both seismic monitoring and seismology. The exploding reflector assumption provides a direct imaging approach for focusing energy at microseismic source locations under the premise of time-reversal imaging. However, the imaging process is prone to aliasing problems when the observed data are sparsely sampled. Physics-informed neural networks (PINNs) provide a feasible solution to obtain aliased free images of the sources by representing the frequency-domain wavefield by as a neural network function of spatial coordinates and angular frequency. Specifically, we use a modified representation of the Helmholtz equation, which incorporates the recorded data in the partial differential equation, as a physical loss for PINNs to avoid the challenge that PINNs face in dealing with boundary conditions. The additional frequency dimension of the neural network function allows for direct image extraction of the subsurface using inverse Fourier transform. Numerical tests on the Overthrust model demonstrate that the proposed method could admit reliable source locations in multiple scenarios with coarsely sampled data in a label-free manner.

Original languageEnglish (US)
Pages1770-1774
Number of pages5
DOIs
StatePublished - Aug 15 2022
Event2nd International Meeting for Applied Geoscience and Energy, IMAGE 2022 - Houston, United States
Duration: Aug 28 2022Sep 1 2022

Conference

Conference2nd International Meeting for Applied Geoscience and Energy, IMAGE 2022
Country/TerritoryUnited States
CityHouston
Period08/28/2209/1/22

ASJC Scopus subject areas

  • Geotechnical Engineering and Engineering Geology
  • Geophysics

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