Page 42 - Hydrocarbon
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Exploration                                                            29










                                     source


                                      receiver




                                                  reservoir






                   Resistivity (Ωm)     depth below seabed                 conductive
                                                                           sediments




                                   resistive rock
                                    (basement)                            resistive rock
                                                                          (reservoir
                                                                          containing oil)

                                          distance along line
             Figure 3.10  Principle of CSEM seabed logging.























             Figure 3.11  Changes in acoustic impedance (AI) give rise to re£ected seismic waves.
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