Abstract

Seismic Interferometric Imaging

Gerard Schuster
University of Utah

Joint work with Jianhua Yu

I present the general theory of seismic interferometric imaging (II). Interferometric imaging is any algorithm that inverts entangled seismic arrivals for the reflectivity or source distributions. Entanglement can occur by crosscorrelation of one trace with another, autocorrelation of traces or time shifting of traces according to the arrival time of a selected arrival such as a direct wave. As examples, I show that II can
estimate the subsurface reflectivity distribution by migrating ghost reflections generated by a drill bit, transmission PS arrivals in crosshole data, and crustal reflections in earthquake data. The II method generalizes the receiver-function imaging method used by seismologists and has the potential to be an important passive seismic imaging tool.