现代地质Issue(3)：659-662,4.
天然气水合物注热水开采热前缘移动规律实验研究
Experimental Study on Thermal Front Movement of Natural Gas Hydrate by Injecting Hot Water
摘要
Abstract
Injecting hot water is one of the effective ways to dissociate natural gas hydrate (NGH),and the movement of thermal front determines the dissociation rate of hydrate,which is a key parameter for thermal stim-ulation.A one-dimensional experimental system is designed to form NGH with different initial conditions in sand-packed tube,and then hot water with different thermal parameters was injected to analyze the movement of thermal front.Results show that the higher the NGH saturation is,the less the thermal front movement rate is;the thermal front movement rate increases slightly with the initial temperature increasing;the thermal front movement rate is larger with higher hot-water temperature and larger hot-water injection rate.Among the four parameters,i.e.NGH saturation,initial temperature,hot-water temperature and hot-water injection rate,the most sensitive parameters are the NGH saturation and hot-water injection rate,followed by the hot-water temper-ature,and the least sensitive parameter is initial temperature.In order to increase dissociation rate of hydrate,it is reasonable to increase the hot-water injection rate within the technical feasibility.Lowering the hot-water tem-perature can slightly decrease the dissociation rate of hydrate,while the economic feasibility will increase.关键词
天然气水合物/注热水/热前缘的移动/影响因素Key words
natural gas hydrate/injecting hot water/thermal front movement/influencing factor分类
天文与地球科学引用本文复制引用
李淑霞,曹文,李杰,高永海..天然气水合物注热水开采热前缘移动规律实验研究[J].现代地质,2014,(3):659-662,4.基金项目
国家自然科学基金项目（51274227，E1302037）；中国科学院可再生能源与天然气水合物重点实验室项目（y207k2）。 （）
