A Proposal for Time-Lapse Seismic Imaging

Up to this point the results of the 4-D experiment have been employed to produce a difference dataset from the survey at the start and the one after a certain time span. Then from this difference conclusions are drawn with respect to the medium change. In this paper a reciprocity theorem is employed to derive the volume integral representation, which shows how this difference is related to the restricted area where the changes occur. This formulation is suited for inversion. Using the boundary integral representation we arrive at an operational procedure for 4-D prestack imaging.