Session

14.09.2017     10:00–12:00

Title:
MS68
Mathematical and computational advances in geoelectromagnetic forward and inverse modelling
Type:
Subsurface models (cryoshpere, hydrosphere, lithosphere, pedoshpere)

Electromagnetic methods are widely used in geophysics to study the subsurface electrical conductivity distribution. Conductivity is affected by the rock type and composition, temperature, and fluid/melt content and thus plays an important role in various engineering and industrial problems, such as hydrocarbon and mineral exploration, CO2 storage monitoring, geothermal reservoir simulation, and many others.Numerical modelling of the electromagnetic fields in complex geological structures with a high level of accuracy requires a large number of model unknowns and is computationally challenging. Topography and bathymetry, complex reservoir geometries, anisotropy and large material contrasts pose serious challenges to existing modelling algorithms. At the same time, typical inversion procedure invoke thousands of forward modelling problems. All of these challenges should be addressed by new approximation algorithms and computational methods to harness the power of modern high-performance computing systems.The speakers will discuss theoretical and computational mathematical issues concerning geoelectromagnetic modelling. 

14.09.2017
10:00–12:00

Title:
MS68
Mathematical and computational advances in geoelectromagnetic forward and inverse modelling
Type:
Subsurface models (cryoshpere, hydrosphere, lithosphere, pedoshpere)

Electromagnetic methods are widely used in geophysics to study the subsurface electrical conductivity distribution. Conductivity is affected by the rock type and composition, temperature, and fluid/melt content and thus plays an important role in various engineering and industrial problems, such as hydrocarbon and mineral exploration, CO2 storage monitoring, geothermal reservoir simulation, and many others.Numerical modelling of the electromagnetic fields in complex geological structures with a high level of accuracy requires a large number of model unknowns and is computationally challenging. Topography and bathymetry, complex reservoir geometries, anisotropy and large material contrasts pose serious challenges to existing modelling algorithms. At the same time, typical inversion procedure invoke thousands of forward modelling problems. All of these challenges should be addressed by new approximation algorithms and computational methods to harness the power of modern high-performance computing systems.The speakers will discuss theoretical and computational mathematical issues concerning geoelectromagnetic modelling. 


10:00–10:20
O346 Novel integral equation solver for the large-scale 3D geoelectromagnetic modeling based on polynomials
Mikhail Kruglyakov (Zurich/CH)


10:20–10:40
O347 Advances in the numerical solution of the time-domain EM inverse problem
Ralph-Uwe Börner (Freiberg/DE)


10:40–11:00
O348 Electromagnetic modeling of geology cluttered with infrastructure and other thin conductors: a finite element method for hierarchical model parameters on volumes, faces and edges of an unstructured grid
Chester Weiss (Albuquerque NM/US)


11:00–11:20
O349 Efficient and accurate ways of modeling the electromagnetic response of metallic pipelines and well casings
Rita Streich (Rijswijk/NL)


11:20–11:40
O350 Integral equations method for electrical tomography sounding above ground surface relief
Tolkyn Mirgalikyzy (Astana/KZ)


11:40–12:00
O351 Imaging by joint inversion of electromagnetic waves and DC currents
Diego Domenzain (Boise, ID/US)