Abstract

Gas hydrate will become targets for future potential energy resources along continental margins worldwide. Gas hydrates were found in nature at high pressure and lower temperature regime in continental margin and permafrost region. Gas hydrate bearing sediments reservoir has been discovered during NGHP R&D expedition in KG offshore. In this study, gas hydrate reservoir has been spatially delineated by seismic data and vertically by log data analysis. Seismic RMS amplitude and impedance values become high in gas hydrate zone due to high seismic velocity in gas hydrate bearing sediments compared to non-gas hydrate or free gas bearing zone. Sonic and resistivity values in log data are shows elevated values in gas hydrate zone with respect to non-hydrate bearing sediments. Spatial extension of gas hydrate bearing sediment is delineated by RMS amplitude attribute and impedance values. Gas hydrate bearing sediments thickness and saturation values are estimated by sonic and resistivity data. Three dimension reservoir porosity and gas hydrate saturation estimated by multi-attribute analysis of seismic and log derived values. Finally, an attempt made to estimate the volumetric resource of initial gas in-place in gas hydrate reservoir by Monte Carlo simulation in limited study area of lower reservoir.