C032 Traveltime and Full-Waveform Inversion for Improved Seismic Imaging in Geologically Complex Areas P. Jaiswal* (Rice University) C.A. Zelt (Rice University) & R. Dasgupta (Oil India Ltd) SUMMARY A complex geology of the thrust belt and acquisition related noise limit the ability of conventional processing to yield a reliable velocity model which in turn leads to a poor subsurface image. We demonstrate the utility of 2-D traveltime and 2-D waveform inversion as supplements to conventional imaging and interpretation processes in geologically complex areas such as the thrust belt. First a smooth velocity model with long wavelength characteristics of the subsurface