Abstract: The present invention discloses a natural gas hydrate-bearing sediment intergranular micro-force testing device and a testing method thereof. The testing device comprises: a high pressure reactor, a natural gas cylinder, a natural gas buffer tank, a condensate circulation device, a water source and a gas-liquid saturated tank, wherein a gas inlet of the natural gas buffer tank communicates with the natural gas cylinder through a first pipeline, a gas outlet of the natural gas buffer tank communicates with a gas inlet of the high pressure reactor through a second pipeline, a water inlet of the high pressure reactor communicates with a water outlet of the gas-liquid saturated tank through a third pipeline, a water inlet of the gas-liquid saturated tank communicates with the water source through a fourth pipeline, the gas outlet of the natural gas buffer tank communicates with the fourth pipeline through a fifth pipeline.

Abstract: A testing device for testing adhesion force includes a thermal insulated glove box, an atomic force microscope, a cryogenic sample stage, a high pressure gas source and a circulating chiller. The atomic force microscope includes a probe for adhering mineral particles. The cryogenic sample stage is configured for preparing gas hydrate sample. The cryogenic sample stage is arranged below the probe. The atomic force microscope and the cryogenic sample stage are placed in the thermal insulated glove box. The high pressure gas source provides pressure required for synthesis of gas hydrates, the high pressure gas source comprises a high pressure chamber covered on the cryogenic sample stage and a high pressure gas cylinder connected with the high pressure chamber. The circulating chiller, an outlet of the circulating chiller is connected with the thermal insulated glove box to control humidity and temperature inside the thermal insulated glove box.

Abstract: A testing device for testing adhesion force includes a thermal insulated glove box, an atomic force microscope, a cryogenic sample stage, a high pressure gas source and a circulating chiller. The atomic force microscope includes a probe for adhering mineral particles. The cryogenic sample stage is configured for preparing gas hydrate sample. The cryogenic sample stage is arranged below the probe. The atomic force microscope and the cryogenic sample stage are placed in the thermal insulated glove box. The high pressure gas source provides pressure required for synthesis of gas hydrates, the high pressure gas source comprises a high pressure chamber covered on the cryogenic sample stage and a high pressure gas cylinder connected with the high pressure chamber. The circulating chiller, an outlet of the circulating chiller is connected with the thermal insulated glove box to control humidity and temperature inside the thermal insulated glove box.

Abstract: The present invention discloses a natural gas hydrate-bearing sediment intergranular micro-force testing device and a testing method thereof. The testing device comprises: a high pressure reactor, a natural gas cylinder, a natural gas buffer tank, a condensate circulation device, a water source and a gas-liquid saturated tank, wherein a gas inlet of the natural gas buffer tank communicates with the natural gas cylinder through a first pipeline, a gas outlet of the natural gas buffer tank communicates with a gas inlet of the high pressure reactor through a second pipeline, a water inlet of the high pressure reactor communicates with a water outlet of the gas-liquid saturated tank through a third pipeline, a water inlet of the gas-liquid saturated tank communicates with the water source through a fourth pipeline, the gas outlet of the natural gas buffer tank communicates with the fourth pipeline through a fifth pipeline.

Abstract: A microscopy sample stage includes a microscope carrier platform, a heating conductor mounting on the microscope carrier platform, and a pressure cover covering the sample groove for providing high pressure for the sample groove. The heating conductor includes a sample groove. The microscopy sample stage further includes a temperature sensor for detecting temperature of the sample groove, a heating resistance for heating the sample groove and a pipeline for transmitting refrigeration medium, the temperature sensor and the heating resistance are mounted on a bottom surface of the sample groove, and the pipeline is arranged inside the heat conductor surrounding the sample groove.