ABSTRACT

The moments of the impulse response can be used for converting the electromagnetic response to an apparent conductance or conductivity of the ground. By taking into account the finite off time and the periodic nature of the EM response, higher-order moments can be used to estimate the properties of the ground. In effect this allows estimates to be obtained from late-time data, and this will reflect the more conductive bodies, or the deeper parts (when the geology is quasi layered). Moment images show some asymmetry artifacts (“herringboning”), but not as strong as the herringbones on time-constant images.

Keywords:
conductance, smith, conductor, information, transmitter, apparent conductivity, thin sheet, infinite lateral extent, late-time data, reservoir characterization
Subjects:
Reservoir Characterization
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2004. Society of Exploration Geophysicists
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