next up previous [pdf]

Next: Acknowledgment Up: Sava: Stereographic imaging Previous: Discussion


Conventional imaging conditions based on cross-correlation of extrapolated wavefields do not take into account the local spatial coherence of reflection events. Events are matched based on their propagation times, which leads to cross-talk between unrelated events. The stereographic imaging condition introduced in this paper operates on seismic wavefields that are first decomposed function of their local slope in space and time. Events are matched based on two parameters (time and local slope), which separates unrelated events and eliminates cross-talk. Higher imaging accuracy is achieved at the expense of larger computational cost. Applications include simultaneous imaging of different seismic experiments (shots), multiple attenuation in the imaging condition, etc.