摘要
根据天然气水合物渗漏系统的形成特征,设计了一套模拟实验系统,即在低温环境中,采用体积为4.62L的透明反应釜,在釜底放置50mm厚的河砂,将二氧化碳气体从釜底部的射流器口喷射进入砂层,在一定的低温(0.5~3℃)和压力范围(1~4MPa)下进行了水合物快速生成模拟实验。实验结果表明,该系统可以模拟海底渗漏体系水合物形成过程,水合物形成特点和形态与海底拍摄的情景相似;2℃和3MPa条件下,得到二氧化碳水合物生成过程中二氧化碳消耗速度瞬时最大值为2.03mol/(s·m^2)。
According to the formation characteristics of the natural gas hydrate leakage system, a model experimental system was set up. The main part of the system was a 4. 62 L transparent organic glass cell. Before the experiments, river sands with a thickness of 50ram were set at the bottom of the cell. An ejector was used to introduce carbon dioxide into submerged sand-layer. The experiment was carried out at the temperature range of 273.5~276.0 K, pressure range of 1.0~4.0 MPa. The experiment shows that, under 2℃ and 3 MPa condition, when the carbon dioxide leakage flux is 0.92 mol/(s·m^2), the carbon dioxide's depletion rate can reach at 2[ 03 mol/(s ·m^2).
出处
《天然气地球科学》
EI
CAS
CSCD
2007年第4期596-600,共5页
Natural Gas Geoscience
基金
中国科学院创新项目(编号:KGCX2-SW-224)
广东省自然科学基金重点项目(编号:052001130)联合资助
关键词
渗漏系统
二氧化碳
水合物
实验模拟
Leakage system
Carbon dioxide
Gas hydrate
Experimental simulation.