If is established experimentally that at temperatures above 0 degrees
C formation of methane hydrate starts with the appearance of thin film
s of this substance on the surface of water; during isothermal storage
, the films permeate throughout the whole volume of the sample. The ma
ximal content of methane hydrate is several (volume) per cent. The vis
cosity of the sample is much lower than that of ice and much higher th
an that of water.