Abstract: The presence of gas hydrate was confirmed by drillings on the Indian continental margin during the Indian National Gas Hydrate Program Expedition 01 (NGHP01) in 2016. In this paper, Holes NGHP01-15A and NGHP01-7D in KrishnaGodavari Basin were selected to estimate the gas hydrate saturation used logging data and core samples to analyze the geomorphologies of gas hydrate and to infer their evolution mechanisms. At Hole NGHP01-15A, the gas hydrate saturations estimated from resistivity and sonic logs assumed the isotropic medium model are 0.2%~33.0% with an average of 9.6%. At Hole NGHP01-7D, the gas hydrate saturations estimated from resistivity log are higher than those from the abnormal chloride concentrations and coring degassing, while the gas hydrate saturations estimated from sonic log based on isotropic rock physic model are comparable to those estimated from core samples, which is 5.0% on average. The gas hydrate is highly saturated in the high angle fractures at Hole NGHP01-10D according to the previous study. Combined with the previous study,three distinct types of gas hydrate reservoirs can be assumed in KG Basin, i.e. isotropic reservoirs in sands interbedded within shale, high angle low conductive fractured reservoirs with low saturation in silt/shale, and high angle conductive fractured reservoirs with high saturation in shale. Three models corresponding to three types of reservoirs are proposed to illustrate different gas hydrate formation processes.