f Imaging time-lapse seismic data using the reciprocity principle

Starting with the acoustic reciprocity theorem a volume integral and a boundary integral representation are derived that relate two time-lapse seismic datasets to temporal changes in the subsurface. On the basis of these exact relations different processing schemes are performed on finite difference data to assess the sensitivity of the time-lapse seismic method. Because the resulting formalism involves actual physical wavefields, more accurate amplitudes are obtainable then with convential, single scattering, schemes that work with computational reference wavefields.