D035 On the Signal Propagation in Marine CSEM L.O. Løseth* (Statoil ASA formerly Dept. of Physics NTNU) & L. Amundsen (Statoil ASA) SUMMARY In marine CSEM (controlled source electromagnetics) and SBL (SeaBed Logging) one explores the subsurface by emitting low-frequency signals from an electric dipole source close to the seabed. The main goal is to determine and characterise possible thin resistive layers within the conductive surroundings beneath the seabed (Eidesmo et al. 2002). A typical geological model from an exploration case includes a sea-surface interface a seabed interface and a thin resistive layer. The electromagnetic (EM) response from a plane


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