Japan's Methane Hydrate R&D Program
- Professor Toru Sato, Associate Professor Yoshihiro Konno
It is assumed that the initial location of the water determines the hydrate distribution in the sediment. One says that hydrates do not form bridging or floating distributions, but that the initial hydrate nucleation in the pores may take place on the surface of the sand grains and the hydrate grows outwards into the pore space. However, it seems that the mechanism of hydrate distribution is still not clear. In this study, we propose a numerical model for estimating the distribution of methane hydrate in porous media from the physical properties of the sediment. The formation of the methane hydrate is numerically simulated in a microscale computational domain, using classical nucleation theory and the phase-field model.
In addition, we develop enhanced gas recovery for methane hydrate reservoirs. To determine a promising gas production method, gas production behavior is numerically predicted in a reservoir scale using reservoir models reflecting real petrophysical properties.