Thermodynamic State of Gas Hydrate in the Krishna-Godavari Basin Inferred From Well Log Analysis Available to Purchase

We examined the in-situ hydrate saturations and salinities of gas hydrate-bearing sediments at National Gas Hydrates Project (NGHP) Site 01–10A in the Krishna-Godavari Basin, offshore India, to determine the thermodynamic state of the hydrate system. We determined hydrate saturations using logging-while-drilling (LWD) data in an iterative application of Archie's Law. The in-situ salinities were calculated from core-derived salinities by assuming that salts remained in the pore space, that the hydrate dissociated completely, and that pore volume remained constant with hydrate formation and dissociation. The in- situ salinity was compared to that required for three-phase equilibrium. We interpret two regions between 45 – 90 and 123 – 160 meters below seafloor (mbsf) where the system is at three-phase equilibrium at Site 01–10A.