Back-projection imaging of physically-modelled seismic data

Joe Wong, Kevin W. Hall

FWI of measured wavefields yields high resolution images of velocity/density structures but can be very slow if the starting model is far from the true model. We recorded physically-modelled seismograms across a 2D region containing isolated targets, and demonstrate that back-projecting travel-time and amplitude anomalies is able to quickly create starting models close to the actual model in location, size, and shape.