AVO analysis of Independent Simultaneous Source OBC data from Trinidad

Summary High-density OBC data was acquired over 364 sq km in the Columbus Basin using Independent Simultaneous Source ISS ® technology. The high acquisition production rates from ISS allow for high density source patch with a dense wide-azimuth ray coverage optimum for estimating seismic velocities through Full Waveform Inversion (FWI). The combination of high fold and accurate high resolution velocities from FWI, improve the amplitude fidelity of the dataset and a full range of AVO and seismic rock properties products are produced and analyzed in this study. AVO analysis on the de-blended ISS OBC dataset and seismic Extended Elastic Impedance (EEI) at different projections for fluid and lithology show good agreement with the AVO signal and EEI logs predicted from the well data. There is a step change in signal-to-noise of pre-stack gathers compared to previous Towed Streamer datasets as well as large improvements in structural images, fault definition and images of Gas-Water contacts.