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 i ntroduce 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).