海底渗漏系统水合物生成过程实验模拟

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4.62 L的透明反应釜，在釜底放置50 mm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(1~4 MPa)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3 MPa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203 mol/(s·m2)。

EXPERIMENTAL SIMULATION OF OCEANIC LEAKAGE HYDRATE FORMATION

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 50mm 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).