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    Transient CFS Response over a Multilayer Earth

    Access Status
    Fulltext not available
    Authors
    Patra, H.P.
    Nimmagadda, Shastri
    Date
    1998
    Type
    Book Chapter
    
    Metadata
    Show full item record
    Source Title
    Deep Electromagnetic Exploration
    ISBN
    3540695842
    Faculty
    Faculty of Business and Law
    School
    School of Management
    URI
    http://hdl.handle.net/20.500.11937/81200
    Collection
    • Curtin Research Publications
    Abstract

    Transient electromagnetic sounding is successfully applied in mineral and groundwater exploration. Major advantage of the transient sounding is to overcome the effects of conductive overburden where frequency-domain CFS frequently fails. Today time-domain EM sounding is also an important exploration tool to determine the permafrost thickness and for oil exploration in ice covered areas. Fourier transform approach is used for computing the transient response due to different electromagnetic sounding configurations over a multilayer earth (Mallick and Verma, 1978; Patra and Mallick, 1980). Digital linear filter approach is used by Patra and Shastri (1991) for computing transient CFS response due to a two-layer earth. Verma (1977) and Verma and Mallick (1979) have studied the phenomenon of detectability with different layered earth models. Studies are made on CFS transient response in terms of resolution characteristics and performance of transient CFS over multilayer earth models. H and K type three-layer and some four-layer earth models are considered for transient response computation. Different loop radii are also chosen in order to study any significant change in the resolution characteristics for detecting deeper layers. Finally, the applicability of transient CFS over a multilayer earth is briefly mentioned.

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    • Transient CFS Response over a two-layer Earth
      Patra, H.P.; Roy, B.; Nimmagadda, Shastri ; Nath, S.K. (1995)
      Transient electromagnetic sounding is successfully applied in mineral and groundwater exploration. Major advantage of the transient sounding is to overcome the effects of conductive overburden where frequency-domain CFS ...
    • Electromagnetic Depth Sounding over a Multi-layer Earth
      Nimmagadda, Shastri (2015)
      The present work embodies the results of theoretical investigations on electromagnetic depth sounding using CFS System over a multi-layer earth. Failure of conventional electrical resistivity sounding in the study of ...
    • Detectability by Electromagnetic Depth Sounding - a data mining tool aiding interpretation of shallow sediments altered by oil & gas seeps
      Nimmagadda, Shastri ; Dreher, Heinz; Chakraborty, Kalyan (2007)
      Electromagnetic depth sounding (EMDS) data are computed for simulated multi-layer earth models at different frequencies and geometries using digital linear filters. Detectability of sub-surface layers is computed ...
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