Abstract
We present a method for modeling transient EM data
acquired on land or at sea. We use the rapid expansion
method (REM) to develop the 3-component electric wave
field time response from the spatial responses found using a
pseudo-spectral method. The results are free of numerical
dispersion and accurate to the Nyquist frequency in time
and space. The resulting diffusive field is a weighted sum
of Chebyshev polynomials, which exhibit a wave-like
character and are very sensitive to small perturbations in
the medium. The method is intrinsically parallel which
leads to computational efficiency. Numerical results
compare favorably with the analytic response and 1D
methods even though the computations are intrinsically 3D.
acquired on land or at sea. We use the rapid expansion
method (REM) to develop the 3-component electric wave
field time response from the spatial responses found using a
pseudo-spectral method. The results are free of numerical
dispersion and accurate to the Nyquist frequency in time
and space. The resulting diffusive field is a weighted sum
of Chebyshev polynomials, which exhibit a wave-like
character and are very sensitive to small perturbations in
the medium. The method is intrinsically parallel which
leads to computational efficiency. Numerical results
compare favorably with the analytic response and 1D
methods even though the computations are intrinsically 3D.
| Original language | English |
|---|---|
| Title of host publication | Expanded Abstracts SEG International Exposition and 88th annual Meeting |
| Publisher | Society of Exploration Geophysicists |
| Pages | 898-902 |
| Number of pages | 5 |
| DOIs | |
| Publication status | Published - 15 Oct 2018 |