Fast approximate physics method for 3D time-domain EM modelling
Abstrak
Full 3D modelling of time-domain electromagnetic data requires tremendous computational resources. Consequently, simplified physics models prevail in geophysics, using a much faster but approximate (1D) forward model. A method is introduced that combines the accuracy of a 1D simplified physics model with the flexibility of coarse grids to reduce modelling errors, thereby avoiding full 3D accurate simulations. The method is applied to airborne time-domain electromagnetic data, generating data with a modelling error often smaller than the standard measurement noise level. The modelling error depends on the specific subsurface model (electrical conductivity values, angle representing the deviation of the 1D assumption) and the specific (temporal) discretization. Computation time can be decreased by a factor of 27. This modelling strategy may serve as an alternative to surrogate models or statistical relations derived from large 3D datasets.
Penulis (2)
W. Deleersnyder
E. Slob
Akses Cepat
- Tahun Terbit
- 2025
- Bahasa
- en
- Sumber Database
- Semantic Scholar
- DOI
- 10.1190/geo-2025-0566
- Akses
- Open Access ✓