Lau, Ryan (2003-05). A 3D finite-element modelling investigation into optimal survey parameters and direct imaging for marine controlled-source electromagnetic surveys. Master's Thesis. Thesis uri icon


  • Relatively little is known about marine controlled-source electromagnetic
    surveys (MCSEM) used to detect hydrocarbon reservoirs. Typical MCSEM require the
    use of inversion to generate a model of the subsurface. We utilize a 3D finite-element
    forward model to simulate a MCSEM survey. With the results we were able to
    determine the strengths and weaknesses of each transmitter and receiver configuration
    that would best detect a shallow hydrocarbon target. Careful selection of the correct
    configuration is important as we have found that incorrect transmitter orientation, offset
    and receiver measurement component can yield misleading results. Using the ideal
    configuration we were able to directly image the hydrocarbon target without the use of
    inversion modeling. The direct image is able to show the hydrocarbon target's shape
    and edges without any ambiguity. The direct image of the target can potentially be used
    to refine 3D inversion modeling, or be used in conjunction with seismic profiles to refine
    seismic picks.

publication date

  • May 2003