摘要
在自然界中,天然气水合物主要以散布状、斑块状和层状构造形式赋存于各种沉积物中,沉积介质对赋存于其中的天然气水合物的性质具有显著影响。采用12℃→0.5℃/3h和12℃→0.5℃/50h 2种降温方法在非饱和粗砂、粉土内分别形成甲烷水合物,以考察降温速率对介质内甲烷水合物生成形态及形成性质的影响。通过实验指出:改变降温速率不影响水合物最终生成形态;缓慢降温利于甲烷水合物在介质内集中生成且形成范围更大。
In order to study the effects of temperature reducing ratios on the configuration and properties of methane hydrate formation inside non-saturated coarse sand and loess,two reducing temperature methods,12℃→0.5℃/3h and 12℃→0.5℃/50h,were used.It was experimentally shown that the changes of temperature reducing ratios caused no effects on the final configuration of methane hydrate formation and slow temperature reducing was favorable for the convergent formation of methane hydrate inside media,under which the hydrate formation scopes inside media were larger.
出处
《天然气地球科学》
EI
CAS
CSCD
北大核心
2009年第6期1000-1004,共5页
Natural Gas Geoscience
基金
中科院知识创新重点项目(编号:KZCX2-YW-330)
国家自然科学基础人才培养基金冰川冻土学特殊学科点(编号:J0630966)联合资助.
关键词
降温速率
甲烷水合物
介质
形成
Temperature reducing ratio
Methane hydrate
Media
Formation.
