Methane Flux Effect on Hydrate Formation and Its Acoustic Responses in Natural Sands

Figure 10

Hydrate morphology in a high methane leakage system. (a) No hydrate. (b) Hydrates first form on the surface of gas bubble and at grain contacts. (c) Hydrates form across the entire sample (mainly formed in the grain contact, a small amount is formed in the pore fluid). (d) The end of hydrate formation (with a methane leakage channel). S represents the sand grain. W represents water. H represents gas hydrate. G represents methane gas.

(a)

(b)

(c)

(d)