Three-dimensional electromagnetic holographic imaging in offshore petroleum exploration
نویسندگان
چکیده
Off-shore petroleum exploration nowadays routinely uses the marine controlled-source (MCSEM) survey, which consists of a set of sea-bottom receivers and a moving electrical bipole transmitter. We show that the MCSEM survey with its dense system of transmitters and receivers, is extremely well suited for application of the holography/migration method. The combined EM signal in the receivers forms a broadband EM ”hologram” of the sea-bottom geological target. As in optical and radiowave holography, we can reconstruct the volume image of the geological target by ”illuminating” this EM hologram with the reference signal. The principles of holography/migration imaging formulated in this paper are applied to the interpretation of an MCSEM survey conducted in the Troll West Gas Province (TWGP), offshore Norway.
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