Transient electromagnetic fields: their efficient three‐dimensional simulation and application to borehole‐based observation techniques

Li, Xiong; Li, Yaoguo; Meng, Xiaohong; Afanasjew, M.; Börner, Jana H.; Börner, Ralph-Uwe; Eiermann, Michael; Ernst, Oliver G.; Spitzer, Klaus

doi:10.1190/1.3659089

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Finite Element Simulation Of Transient Electromagnetic Fields1

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2015

2022

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“…At the surface an exact boundary condition has been implemented (Afanasjew et al, 2011(Afanasjew et al, , 2013Goldman et al, 1986). This allows to omit the discretization of the air halfspace, which results in a significant reduction of the number of degrees of freedom.…”

Section: Finite Element Simulation Of Transient Electromagnetic Fieldsmentioning

confidence: 99%

Electromagnetic methods for exploration and monitoring of enhanced geothermal systems – A virtual experiment

2015

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Section: Finite Element Simulation Of Transient Electromagnetic Fieldsmentioning

confidence: 99%

Electromagnetic methods for exploration and monitoring of enhanced geothermal systems – A virtual experiment

2015

Self Cite

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Implicit finite-difference time-domain schemes for TDEM modeling in three dimensions

Cabrer¹,

Gallardo²,

Flores³

2022

GEOPHYSICS

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Geophysical exploration methods that use controlled electromagnetic sources in time-domain are becoming ubiquitous because of their ease of deployment and data coverage capabilities. While these prospection methodologies have evolved significantly, most computational numerical modeling techniques have been developed in the frequency domain. Given this evolution, it is pertinent to ask whether some known advantages of implicit finite-difference modeling techniques, that are common among other disciplines, apply to the TDEM problem in geophysics. In order to explore the potential advantages of 3D time-domain modeling for TDEM we analyze the differences between two implicit finite-difference formulations: a single order Backward Euler scheme and a 2nd order Crank-Nicolson scheme. To validate our algorithms we tested them with existing analytical solutions for simple geometries for various electromagnetic sources. The results show an acceptable match of both numerical schemes to the analytical solutions and higher accuracy of the 2nd order discrete operator without significant difference in computing time.

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Transient electromagnetic fields: their efficient three‐dimensional simulation and application to borehole‐based observation techniques

Cited by 2 publications

References 2 publications

Electromagnetic methods for exploration and monitoring of enhanced geothermal systems – A virtual experiment

Electromagnetic methods for exploration and monitoring of enhanced geothermal systems – A virtual experiment

Implicit finite-difference time-domain schemes for TDEM modeling in three dimensions

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