How many cubic feet of gas is there in a ton(tonne) of methane hydrates?

LOL

Good point. A cubic foot of ice weighs 62.4 pounds, so there are 32 cubic feet in a ton. There are 164 cubic feet of gas in a cubic foot of methane hydrate ice, or 5256 cubic feet of gas per ton, ~1 barrel of oil equivalent per ton of methane hydrate.
A ton of oil sands produce 1/2 boe.

Except that the oil sands are not buried under the ocean or under a thousand meters of permafrost.