The invention provides a collecting
system of core gas in a
natural gas hydrate drilling field. The collecting
system comprises an air collector, a water bath thermotank, a vibration table and a gas collecting
bottle, wherein the water bath thermotank is arranged on the vibration table; the air collector comprises a tank body and a tank body cover, wherein the tank body and the tank body cover are separable, and the tank boy is in seal connection with the tank body cover; and when the collecting
system is adopted to collect the core gas, the tank body filled with a
core sample is in seal connection with the tank body cover when the water bath thermotank is positioned in a constant temperature saturated
salt water environment, and the gas collecting
bottle is connected with a gas collecting outlet of the tank body cover under the constant temperature saturated
salt water environment. The collecting system provided by the invention has the advantages that the processes of packaging the aquo-complex
core sample, releasing the gas, collecting the gas, collecting gas in an oscillation manner and sealing and storing the gas are finished once, a series of
pilot processes are simplified, and the work efficiency of gas collection is greatly improved.