Abstract:

Natural gas hydrate is a newly potentially non-conventional energy resource. How to exploit it is a big problem. A one-dimension,and three-phase(gas, water, and hydrate)model is used to simulate the process of gas production from core samples containing methane hydrate by means of depressurization. Comparison between the simulation results and those of Yousif''s is carried out. In the study, factors such as the permeability,initial saturation of gas hydrates, production pressure, and temperature are taken into account.The results indicate that higher permeability, lower initial hydrate saturation, and smaller production pressure will result in faster decomposition speed of gas hydrates.

Key words: gas hydrate, numerical simulation, sensitivity analysis, production