A fracture simulated oil recovery test apparatus includes a sleeve, the sleeve positioned within an oven and an oil saturated matrix positioned within the sleeve. The fracture simulated oil recovery test apparatus further includes a proppant pack positioned within the oil saturated matrix, the proppant pack having an inlet an outlet and a controller, the controller adapted to control the pressure within the oil saturated matrix.

A method for detecting a phase separation of a waterborne or solvent-borne or solvent-free coating composition includes providing the coating composition in a receptacle; providing a measurement instrument for receiving the receptacle, the measurement instrument including a measurement probe; controlling the measurement instrument to a) displace the measurement probe through the coating composition along a predefined measurement path with a predefined speed profile, the predefined measurement path extending along a length axis of the receptacle, b) acquire a force-displacement profile by measuring a force exercised on the measurement probe while the probe is being displaced along the predefined measurement path with the predefined speed profile; processing the force-displacement profile for detecting at least one phase separation of the coating composition; and outputting a detection result.

The present invention improves the precision in observing cracks in rocks during a hydraulic fracturing test, improving a scientific understanding of the regular pattern of development cracks in of hydraulically fractured rocks. The technical solution includes: hydraulically fracturing the rock with aqueous solutions containing an interventional contrast-enhanced agent, forming hydraulically fractured cracks, wherein the difference in a mass attenuation coefficient / of x-rays between the cracks and the rock is improved by the interventional contrast-enhanced agent in the cracks, moreover, the difference in mass energy absorption coefficient .sub.en/ of x-rays between the cracks and the rock is improved, then the linear attenuation coefficient of the reception of the detector is changed, improving the imaging resolution for hydraulically fractured cracks in the rock.

A ring shear and seepage-coupled apparatus and a ring shear and seepage-coupled test system for rock and rock fracture under tension or compression stress are provided, relating to the technical field of mechanical testing devices. As to the ring shear and seepage-coupled apparatus, an axial piston rod is connected with an upper shear box, a torque transferring shaft is connected with a lower shear box, an axial force transducer is provided on the axial piston rod, a torque transducer is provided on the torque transmitting shaft, and a force transferring plate is fixedly connected onto the upper shear box. The force transferring plate is able to transmit a counter force for exerting a torque. Radial and circumferential seepage tests can be achieved by providing a seepage structure. The ring shear and seepage-coupled test system comprises a servo pump and the ring shear and seepage-coupled apparatus as mentioned above.

A method for enhanced interventional imaging for cracks, improving the precision in observing cracks in rock hydraulic fracturing test, benefiting for scientifically understanding regular pattern of development of hydraulically fractured cracks in rocks. The technical solution comprises: hydraulically fracturing the rock with aqueous solutions containing nanoscale interventional contrast-enhanced agent which has a high atomic number; forming hydraulically fractured cracks, wherein the difference in mass attenuation coefficient / of x-ray between the cracks and the rock is improved by the interventional contrast-enhanced agent in the cracks, moreover, the difference in mass energy absorption coefficient .sub.en/ of x-ray between the cracks and the rock is improved, then the linear attenuation coefficient of the reception of detector is changed, improving the imaging resolution for hydraulically fractured cracks in the rock.

A computer-assisted method to monitor soil porosity at a field study site using a portable apparatus, the method including: acquiring a soil sample using a first container; recording a first measurement of a mass and a volume of the soil sample; adding the soil sample to a second container until the soil sample is added in entirety, wherein the second container is pre-filled with a fluid medium, wherein the soil sample is added to the second container without causing soil clustering, and wherein a second measurement of a mass of the second container with the fluid medium is recorded; recording a third measurement of a mass of the second container with the soil sample fully immersed in the fluid medium; calculating a porosity of the soil sample based on the first, second, and third measurements; and providing, at the field study site, the calculated porosity of the soil sample.

A high-temperature and high-pressure core displacement test system includes a CT scanner configured to perform CT scanning, a gripper system configured to grip a core, a machine tool configured to move the gripper system to the CT scanner for CT scanning, a gripper load control system configured to heat and input a fluid into or/and receive a fluid output from the gripper system, and an acquisition and data analysis system configured to acquire a temperature and a pressure within a core gripping cavity, and detection data of the CT scanner and strain rosettes for analysis. According to the high-temperature and high-pressure core displacement test system and method, the strength of the gripper system in a high-temperature and high-pressure environment is improved, the projection performance of CT rays is ensured, and the optical fiber positioning precision and the core deformation measurement precision in a CT rapid scanning state are improved.

A computer-assisted method to monitor soil porosity at a field study site using a portable apparatus, the method including: acquiring a soil sample using a first container; recording a first measurement of a mass and a volume of the soil sample; adding the soil sample to a second container until the soil sample is added in entirety, wherein the second container is pre-filled with a fluid medium, wherein the soil sample is added to the second container without causing soil clustering, and wherein a second measurement of a mass of the second container with the fluid medium is recorded; recording a third measurement of a mass of the second container with the soil sample fully immersed in the fluid medium; calculating a porosity of the soil sample based on the first, second, and third measurements; and providing, at the field study site, the calculated porosity of the soil sample.