摘要
利用自制的一维天然气水合物开采模拟实验系统,模拟海洋地质条件,在填砂模型中生成天然气水合物,并通过注入热盐水进行热力开采的物理模拟实验,分析多孔介质中天然气水合物注热盐水分解动态过程及注热参数对热力开采能量效率的影响。结果表明:注热盐水可有效地促进水合物的分解,水合物分解时局部电阻率明显升高;通过正交设计实验对注热参数进行敏感性分析,在相同的初始温度、压力及水合物饱和度条件下,注热水温度对注热分解的能量效率影响最大,然后依次是注热水速度、注热水时间。实验条件下,注热盐水分解可达到最大能量效率的注热参数为注热水温度60℃、注热水速率为12 mL/min、注热水时间100 min,此时能量效率为3.86。
A novel one-dimensional system for natural gas hydrate（NGH） exploitation was designed,which was used to study the formation and decomposition process of NGH.By modeling marine geological environment,NGH was formed in a sand-packing model,then hot-brine was injected to the model to study the thermal dissociation characteristics and the injection factors influencing the energy efficiency.The experimental results show that： NGH was dissociated effectively by injecting hot-brine,and the local resistivity increased obviously during the dissociation of NGH;sensitivity analysis on thermal-injection parameters was performed by orthogonal design test.In the same conditions of initial temperature,pressure,and NGH saturation,the most sensitive parameter influenceing the energy efficiency of thermal stimulation was the hot-brine temperature,followed by the hot-brine injection rate and injection time in turn.Under the condition of this experiment,the highest energy efficiency was 3.86,which was obtained when the hot-brine temperature was 60℃,injection rate was 12 mL/min and injection time was 100 min.
出处
《太原理工大学学报》
CAS
北大核心
2010年第5期680-684,共5页
Journal of Taiyuan University of Technology
基金
中央高校基本科研业务费专项资金资助(09CX05001A)
