Methane leakage simulation is one of the core functions of this system. The system can simulate various methane leakage scenarios, covering natural leaks caused by seabed geological activities, such as leaks caused by methane hydrate decomposition; and man-made leaks caused by human deep-sea mining activities, such as accidental leaks during deep-sea oil and gas extraction. During the simulation, the methane leakage rate can be precisely controlled, simulating both the slow rate of long-term chronic leakage and the high rate of sudden large-scale leakage events. At the same time, the system can also simulate the state of methane under different leakage forms, such as escaping in the form of bubbles and diffusing in seawater in a dissolved state, providing diverse simulation methods for comprehensive research on methane leakage mechanisms.

Main Technical Parameters

1. Simulation Test Chamber Size and Function: Inner diameter Ф200 mm, total height 1000 mm (reservoir height 248 mm, sea layer height 752 mm). It includes a sediment simulation chamber and a seawater simulation chamber, with multiple functions such as sterilization capability, leakage behavior simulation, sediment chemical zoning simulation, deep-sea pressure environment simulation, and temperature environment simulation.
2. Maximum Safe Operating Pressure and Temperature: Maximum safe operating pressure of the simulation chamber and internal equipment: 20 MPa. Safe operating temperature range: -15~80℃.
3. Flow and Pressure Monitoring: Gas flow monitoring devices and pressure monitoring devices are installed at the sediment layer inlet and the seawater layer outlet, and pressure sensors are installed at the inlet and outlet.
4. Hydrate Monitoring Method: Inserted resistivity method and temperature field monitoring.
5. Pressure Sensing System: Measurement accuracy is ±0.1% F.S, and it can transmit pressure data in real time.
6. Temperature Sensing System: The temperature field is designed at the bottom of the sediment pot, with three layers (upper, middle, and lower), each layer having 4×4=16 temperature measuring points, totaling 48 temperature measuring points. The measurement accuracy is ±0.1℃, and it can transmit temperature data in real time.
7. Resistivity System: Resistivity measuring points are located at the bottom of the sediment layer, with three layers (upper, middle, and lower), each layer having 4×4=16 pairs, totaling 48 pairs. The measuring point measurement accuracy is ±0.1 Ω·m, and it can transmit resistivity data in real time.
8. Camera System: Real-time recording and transmission of captured images, including a camera lifting system. The vertical travel of the camera is no less than 500 mm, and the external device has high-temperature sterilization function.
9. High and Low Temperature Water Bath System: Volume no less than 40 L, safe operating temperature range: -10～80℃, including a water bath lifting system, and the seawater layer and mud layer have independent temperature control functions.
10. The controllable temperature range includes -15~80℃, with an error within ±1℃.