A multifunctional experimental system for in-situ simulation of a gas hydrate includes a computed tomography (CT) scanning device, a reactor, and a pipeline system. The reactor includes: a reactor upper end cover, a reactor lower end cover, a reactor housing and a clamp holder. A first pipeline channel is formed at a top, an upper groove is formed at a bottom, and a first upper joint is arranged in the upper groove. A second pipeline channel is formed at a side, a lower groove is formed at a top, and a first lower joint is arranged in the lower groove; where two ends of the reactor housing are respectively fixed to the reactor upper end cover and the reactor lower end cover. A top end of the clamp holder is provided with a second upper joint, a bottom end of the clamp holder is provided with a second lower joint.

A fluid pressure loading device applied to an industrial computed tomography scanning test system includes a body, a sample accommodating chamber and at least one fluid medium chamber being provided in the body. Each of the at least one fluid medium chamber is provided therein with a piston, the corresponding fluid medium chamber is separated into two chambers by the piston, one of the two chambers is in communication with an external hydraulic medium via oil lines provided in the body, the other of the two chambers is in communication with the sample accommodating chamber, and one end, facing towards the sample accommodating chamber, of the piston is extendable into the sample accommodating chamber. With the loading device, real-time loading of a test sample can be realized, thus improving a simulation accuracy of the system, and multi-directional loading of the sample can be realized.

An industrial CT scanning test system. The test system includes a test base, a multi-axis motion swivel table supported on the test base, a ray generator, an image acquisition device, and a fluid pressure loading device, and further includes a control device. The fluid pressure loading device includes at least one loading cylinder, and in case of performing a scanning experiment, the at least one loading cylinder is placed on a sample stage of the multi-axis motion swivel table together with a sample, and real-time loading of loads in different directions on the sample is performed according to test requirements.

Embodiments of the present disclosure provide a multi-physical field imaging method based on PET-CT and DAS, comprising: wrapping distributed acoustic sensors on a surface of a non-metallic sample to be tested, and then placing them in a pressure device; loading triaxial pressures; preparing a tracer fluid; pumping the tracer fluid into the non-metallic sample; collecting PET images and CT images of internal structure of the non-metallic sample, meanwhile, monitoring internal acoustic emission events of the non-metallic sample in real time; combining the PET images with the CT images, to obtain PET/CT images; locating the acoustic emission events, and obtaining occurrence time and spatial location of internal structural perturbations; and analyzing a mechanism of fluid-solid coupling effect in the non-metallic sample under loaded stress. The imaging method and system of the present disclosure can accurately and reliably image the fluid-solid coupling process in the material.

The disclosed embodiments include a rock sample inspection method. The method may include preparing a sample of formation rock by encapsulating the sample, inserting the sample into a vessel body as part of a test assembly, enclosing the sample within an low compressibility fluid, applying pressure to an interior of the vessel body by tightening a compression screw employing a piston acting on said low compressibility fluid, monitoring the pressure, conducting a test on the sample, and recording results of the test for further analysis.

The disclosed embodiments include a rock sample inspection method. The method may include preparing a sample of formation rock by encapsulating the sample, inserting the sample into a vessel body as part of a test assembly, enclosing the sample within an low compressibility fluid, applying pressure to an interior of the vessel body by tightening a compression screw employing a piston acting on said low compressibility fluid, monitoring the pressure, conducting a test on the sample, and recording results of the test for further analysis.

A visible test system includes a test chamber system, a heating system, a pressure control system, and a high-energy accelerator CT detection system configured to scan and detect the seepage and migration of magnetic fluid in fractures in a sample. The test chamber system includes a pressure chamber and a sample encapsulation device immersed in hydraulic oil arranged inside the pressure chamber. The heating system includes a magnetic fluid heating device, a resistance wire heating device and a temperature detection device. The magnetic fluid heating device includes a magnetic fluid loading pump configured to supply the magnetic fluid injected into the sample encapsulation device and an alternating magnetic field control device configured to provide an alternating magnetic field for heating the magnetic fluid. The resistance wire heating device is configured to heat the hydraulic oil. The present invention makes the fracture connectivity change during rock mass fracture visible.

The disclosed embodiments include a rock sample inspection method. The method may include preparing a sample of formation rock by encapsulating the sample, inserting the sample into a vessel body as part of a test assembly, enclosing the sample within an low compressibility fluid, applying pressure to an interior of the vessel body by tightening a compression screw employing a piston acting on said low compressibility fluid, monitoring the pressure, conducting a test on the sample, and recording results of the test for further analysis.

Embodiments of the present disclosure provide a multi-physical field imaging method based on PET-CT and DAS, comprising: wrapping distributed acoustic sensors on a surface of a non-metallic sample to be tested, and then placing them in a pressure device; loading triaxial pressures; preparing a tracer fluid; pumping the tracer fluid into the non-metallic sample; collecting PET images and CT images of internal structure of the non-metallic sample, meanwhile, monitoring internal acoustic emission events of the non-metallic sample in real time; combining the PET images with the CT images, to obtain PET/CT images; locating the acoustic emission events, and obtaining occurrence time and spatial location of internal structural perturbations; and analyzing a mechanism of fluid-solid coupling effect in the non-metallic sample under loaded stress. The imaging method and system of the present disclosure can accurately and reliably image the fluid-solid coupling process in the material.

The disclosed embodiments include a rock sample inspection method. The method may include preparing a sample of formation rock by encapsulating the sample, inserting the sample into a vessel body as part of a test assembly, enclosing the sample within an low compressibility fluid, applying pressure to an interior of the vessel body by tightening a compression screw employing a piston acting on said low compressibility fluid, monitoring the pressure, conducting a test on the sample, and recording results of the test for further analysis.