The formation behaviors of methane hydrate in the porous media were studied. The silica gel with the mean pore diameters of 9.03, 12.95, 17.96 and 33.20 nm and three particle diameters of 0.105～0.150 mm, 0.150～0.200 mm and 0.300～0.450 mm was used as the porous media for the experiments, respectively. The formation experiments of methane hydrate in the porous media were carried out at the temperature range of 274.15～278.15 K and the initial formation pressure range of 7.4～11.0 MPa. The experiment results indicated that the formation rate of methane hydrate increases with the increase of the initial formation pressure, the decrease of the bath temperature, the decrease of the particle range and the increase of the mean pore diameter.

Key words: methane hydrate, formation behavior, porous media