Abstract
Velocity analysis of multi-channel seismic (MCS) data and amplitude-versus-offset (AVO) modeling provides an efficient way of identifying gas hydrate and free gas, and therefore the nature of the bottom-simulating reflector (BSR). Additionally, AVO modeling also yields estimates of the hydrate concentration and free gas saturation across the BSR in terms of velocity distribution. In the present study, we apply directivity correction in order to accentuate the AVO behavior. Modeling for AVO pattern of the observed BSR over the Kerala–Konkan Offshore Basin may provide the probable velocity distribution across the BSR and thereby infer whether hydrate or hydrate/free gas model governs the AVO observations. Initial results indicate the possible presence of free gas underlying the gas hydrates-saturated sediments in this region.
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