Spectral-Element FWI: A High-Fidelity Alternative to Finite-Difference for ComplexGeophysical Challenges

SUMMARY

The Spectral-Element Method (SEM) is a high-fidelity alternative to traditional Finite-Difference (FD) methods for seismic modelling and inversion.

While FD methods are computationally efficient on regular grids, they face challenges in handling complex geological interfaces, material heterogeneities, and boundary conditions. SEM, leveraging unstructured meshes and high-order accuracy, overcomes these limitations and excels in environments with intricate topography and variable material properties.

Enhanced by modern numerical techniques and GPU acceleration, SEM provides precise modelling capabilities for full-waveform modelling and inversion and advanced geophysical applications. Field data from offshore Western Australia demonstrates SEM's advantages in representing complex seabed geometries and improving waveform modelling and inversion accuracy compared to FD methods.