ArticleApplied GeophysicsModeling electromagnetics on cylindrical meshes with applications to steel-cased wellsLindsey J. HeagyDoulas W. OldenburgMarch 7, 2019https://doi.org/10.1016/j.cageo.2018.11.010Download PDFBack to ArticleDownload ArticleContentsModeling electromagnetics on cylindrical meshes with applications to steel-cased wellsEquationsFiguresaugustin-response-function-muaugustin-response-function-sigmaaugustin3cmaugustinbfieldsaugustinfsrbfdembtdemcommer-meshcommer-modelcommer-resultscyl-finite-volumecylwrapfdemnsfkaufman-finite-wellkaufman-setupkaufman-zonesmagnetic-flux-density-mumagnetic-flux-density-sigmatdem-currentstdemnsfTablesSupporting Documentsconductanceconstitutiverelationsdcequationsdiscretedcccdiscretedcnodaldiscretefdemebdiscretefdemhjmaxwellfreqmaxwelltimepermeanceaugustin-response-function-muaugustin-response-function-sigmaaugustin3cmaugustinbfieldsaugustinfsrbfdembtdemcommer-meshcommer-modelcommer-resultscyl-finite-volumecylwrapfdemnsfkaufman-finite-wellkaufman-setupkaufman-zonesmagnetic-flux-density-mumagnetic-flux-density-sigmatdem-currentstdemnsfcommer-comparisonFigure 1:Negative ratio of the secondary field to the primary response for real (solid) and imaginary (dashed) magnetic fields measured at a receiver 500m below the surface.EquationspermeanceFiguresaugustin-response-function-sigma