Print Email Facebook Twitter Electromagnetic and seismoelectric sensitivity analysis using resolution functions Title Electromagnetic and seismoelectric sensitivity analysis using resolution functions Author Maas, P.J. Grobbe, N. Slob, E.C. Mulder, W.A. Faculty Civil Engineering and Geosciences Department Geoscience & Engineering Date 2015-06-01 Abstract For multi-parameter problems, such as the seismoelectric system, sensitivity analysis through resolution functions is a low-cost, fast method of determining whether measured fields are sensitive to certain subsurface parameters. We define a seismoelectric resolution function for the inversion of a bulk density perturbation. The synthetic data and Green’s functions required to construct the resolution function are computed using the seismoelectric modelling code ESSEMOD. First, we consider the purely electromagnetic problem with a conductivity perturbation at a single point in an isotropic homogenous half-space. The result is nearly identical to a published result based on analytical Green’s functions. It correctly maps the position of the scatterer. Next, we perform an electromagnetic sensitivity analysis for the case of a layered background medium. Again, the resolution function is capable of correctly mapping the scatterer when it is above as well as below a layer of increased conductivity; although in the latter case with less resolution. Finally, we generate multi-component synthetic data with our forward modelling code and compute the seismoelectric resolution function for inversion of a bulk-density perturbation. We find that the seismoelectric system is sensitive to a perturbation in bulk density and that the position of the perturbation can be correctly recovered. To reference this document use: http://resolver.tudelft.nl/uuid:e984df20-95ce-4546-93e1-57fa00fe29c1 Publisher EAGE Source 77th EAGE Conference and Exhibition 2015, Madrid, Spain, 1-4- June 2015 Part of collection Institutional Repository Document type conference paper Rights (c) 2015 The Author(s) Files PDF 316999.pdf 560.17 KB Close viewer /islandora/object/uuid:e984df20-95ce-4546-93e1-57fa00fe29c1/datastream/OBJ/view