Details of the Abstract
| Title of paper | An upscaling study for electromagnetic methods with infrastructure |
| List of authors | Heagy, L.J., Oldenburg, D.W. |
| Affiliation(s) | University of British Columbia Geophysical Inversion Facility, University of British Columbia Geophysical Inversion Facility |
| Summary | Steel infrastructure, and in particular steel-cased wells, are often integral elements that need to be considered in geoscience problems. Yet their presence generates challenges for the simulation and inversion of electromagnetic data. Recently, there have been advancements in numerical strategies for approximating casings using highly refined tetrahedral or OcTree meshes, as well as the development of strategies that define steel casings on the edges of meshes in finite element or finite volume simulations. There are still questions about how to choose physical properties that approximate the casing in these approaches. In this abstract, we define an inverse problem to estimate the electrical conductivity and magnetic permeability of a solid cylinder that approximates a hollow steel-cased well. These values can then be used in a simulation that approximates the casing on a coarse mesh or on the edges of a mesh. By performing simulations and inversions at a range of frequencies, we also discuss physical insights that can be gained, such as seeing when inductive effects begin to dominate the recovered physical property values. |
| Session Keyword | 2.0 EM theory, modelling and Inversion |
| File upload |
2.0_an_upscaling_study_for_el_heagy_01.pdf
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