Abstract
In order to migrate electromagnetic data from a low frequency controlled source, 3D electromagnetic Green functions should be used since the near-fleld efiects may be large. Imaging principles of the correlation type do not have su-cient depth sensitivity to be used in a one-pass migration step. To increase the depth sensitivity, a non-local operator is introduced in the imaging condition. This operator accounts for the lateral propagation of the EM fleld in the high resistivity reservoir. The non-local operator depends on two parameters related to the resistivity and thickness of an assumed resistivity anomaly. We propose to estimate these parameters from a limited set of forward modeling operations. DOI: 10.2529/PIERS060907093858
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