Simulation of marine controlled source electromagnetic measurements using a parallel fourier <Emphasis Type="Italic">hp</Emphasis>-finite element method |
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Authors: | David Pardo Myung Jin Nam Carlos Torres-Verdín Michael G Hoversten Iñaki Garay |
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Institution: | 1.Basque Center for Applied Mathematics (BCAM),Bilbao,Spain;2.IKERBASQUE,Basque Foundation for Science,Bilbao,Spain;3.Department of Energy and Mineral Resources Engineering,Sejong University,Sejong,Korea;4.The University of Texas at Austin,Austin,USA;5.Chevron,San Ramon,USA;6.Institute for Theoretical Physics III,University of Erlangen-Nürnberg,Erlangen-Nuremberg,Germany |
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Abstract: | We introduce a new numerical method to simulate geophysical marine controlled source electromagnetic (CSEM) measurements for
the case of 2D structures and finite 3D sources of electromagnetic (EM) excitation. The method of solution is based on a spatial
discretization that combines a 1D Fourier transform with a 2D self-adaptive, goal-oriented, hp-Finite element method. It enables fast and accurate simulations for a variety of important, challenging and practical cases
of marine CSEM acquisition. Numerical results confirm the high accuracy of the method as well as some of the main physical
properties of marine CSEM measurements such as high measurement sensitivity to oil-bearing layers in the subsurface. In our
model, numerical results indicate that measurements could be affected by the finite oil-bearing layer by as much as 104% (relative difference). While the emphasis of this paper is on EM simulations, the method can be used to simulate different
physical phenomena such as seismic measurements. |
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