Well log and synthetic seismogram analysis of an oilfield in Assam, India: A 3-C seismic development feasibility study

Maria Fernanda Quijada, Robert R. Stewart

Well logs from several fields in Assam, India were analyzed to determine the feasibility of a 3-C seismic development study. One of the challenges in the area is to identify sand-rich regions (potential reservoir zones) within a structural geologic setting. We find that representative reservoir sands have an identifiable response; in particular, higher S-wave velocities compared to their surrounding sediments. Synthetic seismograms generated from the logs suggest that these reservoir sands may be detectable with PP and PS seismic techniques.