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).