Numerical modelling in geo-electromagnetics: advances and challenges

RU Börner - Surveys in Geophysics, 2010 - Springer
During the last decade, tremendous advances have been observed in the broad field of
numerical modelling for geo-electromagnetic applications. This trend received support due …

A review of airborne electromagnetic methods with focus on geotechnical and hydrological applications from 2007 to 2017

E Auken, T Boesen, AV Christiansen - Advances in geophysics, 2017 - Elsevier
The purpose of this review is to report the major advancements that have been made within
the area of airborne electromagnetics (AEM) between 2007 and 2017, with a focus on …

3D finite-difference frequency-domain modeling of controlled-source electromagnetic data: Direct solution and optimization for high accuracy

R Streich - Geophysics, 2009 - library.seg.org
Three-dimensional modeling of marine controlled-source electromagnetic (CSEM) data is
vital to improve the understanding of electromagnetic (EM) responses collected in …

Three-dimensional adaptive higher order finite element simulation for geo-electromagnetics—a marine CSEM example

C Schwarzbach, RU Börner… - Geophysical Journal …, 2011 - academic.oup.com
We present a new 3-D vector finite element code and demonstrate its strength by modelling
a realistic marine CSEM scenario. Unstructured tetrahedral meshes easily allow for the …

3D time-domain simulation of electromagnetic diffusion phenomena: A finite-element electric-field approach

ES Um, JM Harris, DL Alumbaugh - Geophysics, 2010 - library.seg.org
We present a finite-element time-domain (FETD) approach for the simulation of 3D
electromagnetic (EM) diffusion phenomena. The finite-element algorithm efficiently …

3D finite-element forward modeling of electromagnetic data using vector and scalar potentials and unstructured grids

S Ansari, CG Farquharson - Geophysics, 2014 - library.seg.org
We present a finite-element solution to the 3D electromagnetic forward-modeling problem in
the frequency domain. The method is based on decomposing the electric field into vector …

Rational Krylov approximation of matrix functions: Numerical methods and optimal pole selection

S Güttel - GAMM‐Mitteilungen, 2013 - Wiley Online Library
Matrix functions are a central topic of linear algebra, and problems of their numerical
approximation appear increasingly often in scientific computing. We review various rational …

Three-dimensional finite-element modelling of magnetotelluric data with a divergence correction

CG Farquharson, MP Miensopust - Journal of Applied Geophysics, 2011 - Elsevier
A finite-element method for computing the electric field in a 3-D conductivity model of the
Earth for plane wave sources, thus enabling magnetotelluric responses to be calculated, is …

A finite element multifrontal method for 3D CSEM modeling in the frequency domain

NV da Silva, JV Morgan, L MacGregor, M Warner - Geophysics, 2012 - library.seg.org
There has been a recent increase in the use of controlled-source electromagnetic (CSEM)
surveys in the exploration for oil and gas. We developed a modeling scheme for 3D CSEM …

A finite-element time-domain forward solver for electromagnetic methods with complex-shaped loop sources

J Li, X Lu, CG Farquharson, X Hu - Geophysics, 2018 - library.seg.org
ABSTRACT A finite-element time-domain (FETD) electromagnetic forward solver for a
complex-shaped transmitting loop is presented. Any complex-shaped source can be viewed …