Print Email Facebook Twitter Examples of Seismic Shallow Subsurface Characterisation and Deep Electromagnetic Monitoring Title Examples of Seismic Shallow Subsurface Characterisation and Deep Electromagnetic Monitoring Author Slob, E.C. (TU Delft Applied Geophysics and Petrophysics) Draganov, D.S. (TU Delft Applied Geophysics and Petrophysics) Eltayieb, M.F.M.I. (TU Delft Applied Geophysics and Petrophysics) Drijkoningen, G.G. (TU Delft Applied Geophysics and Petrophysics) Werthmüller, D. (TU Delft Geoscience and Engineering) Ghose, R. (TU Delft Applied Geophysics and Petrophysics) Department Geoscience and Engineering Date 2021 Abstract Difficulties in detecting and characterising shallow objects close the surface with seismic shear waves are often problematic because of dominant surface waves. By sequencing a specific combination of two data driven processing steps followed by diffraction tomography can overcome these problems. Small scattering objects become visible in the final image that can have importance of the understanding of subsurface locations, such as areas of archaeological interest. On the other hand, deep changes in the electric resistivity on land are often problematic to detect and especially to monitor time-lapse change over long periods of time. The usual electrodes slowly erode and vanish. Geothermal heat production environments often lead to changes in the resistivity between in-situ water-filled formations and cooler injected water-filled formations of less than one order of magnitude. A dedicated set of capacitively coupled electrode could overcome to erosion problem. When placed in a well with composite casing, these could be used in measurements of much enhanced detectability. In that case it is necessary to have electrodes in a zone from below to above the target layer. By changing the source offset at the surface, optimal measurements can be done to detect the small and deep changes in resistivity. To reference this document use: http://resolver.tudelft.nl/uuid:bb8cf421-a699-4aa1-a7f8-d4d54952320e DOI https://doi.org/10.3997/2214-4609.202120260 Publisher European Association of Geoscientists & Engineers Embargo date 2022-06-01 ISBN 9789462823860 Source NSG2021 27th European Meeting of Environmental and Engineering Geophysics, 2021 Event NSG2021 27th European Meeting of Environmental and Engineering Geophysics, 2021-08-29 → 2021-09-02 Bibliographical note Green Open Access added to TU Delft Institutional Repository 'You share, we take care!' - Taverne project https://www.openaccess.nl/en/you-share-we-take-care Otherwise as indicated in the copyright section: the publisher is the copyright holder of this work and the author uses the Dutch legislation to make this work public. Part of collection Institutional Repository Document type conference paper Rights © 2021 E.C. Slob, D.S. Draganov, M.F.M.I. Eltayieb, G.G. Drijkoningen, D. Werthmüller, R. Ghose Files PDF SlobNSG2021_260_402_Slob_Evert.pdf 1.62 MB Close viewer /islandora/object/uuid:bb8cf421-a699-4aa1-a7f8-d4d54952320e/datastream/OBJ/view