Hypergravity experimental apparatus and method for natural gas hydrate exploitation by hydraulic fracturing

A hypergravity experimental apparatus for natural gas hydrate exploitation by hydraulic fracturing, comprising:

• a high-pressure vessel, a water bath temperature control module, an effective stress control module, a fracturing reinforcement exploitation module, a hydrate preparation module, and a model multi-physical field monitoring module, the high-pressure vessel is provided with a hydrate reservoir model inside and is entirely placed in a water bath environment and connected to the water bath temperature control module, so that the hydrate reservoir model is placed in the water bath environment, the effective stress control module communicates with the inside of the high-pressure vessel and applies stress control to the hydrate reservoir model, the fracturing reinforcement exploitation module communicates with the inside of the high-pressure vessel and conducts fracturing, reinforcement, and exploitation experiments on the hydrate reservoir model, the model multi-physical field monitoring module is installed on the high-pressure vessel to monitor the hydrate reservoir model, and the hydrate preparation module communicates with the hydrate reservoir model inside the high-pressure vessel,
• the high-pressure vessel, the effective stress control module, and the fracturing reinforcement exploitation module are all mounted within a centrifuge basket and operate under 1 g to 500 g hypergravity,
• the high-pressure vessel is provided with a loading plate inside, the loading plate divides a space inside the high-pressure vessel into an upper chamber and a lower chamber, the lower chamber is provided with the hydrate reservoir model inside, the upper chamber is provided with an axial pressure fluid layer inside, the fracturing reinforcement exploitation module comprises a hydrate reservoir hydraulic fracturing module, an injection fluid switching and reservoir reinforcement module, and a hydrate exploitation module, the hydrate reservoir hydraulic fracturing module, the injection fluid switching and reservoir reinforcement module, and the hydrate exploitation module are all communicate with the hydrate reservoir model, and the effective stress control module communicates with the axial pressure liquid layer and is connected to the hydrate exploitation module.