Gas migration test:

The automated THM triaxial cell were used for gas migration test. The apparatus can host samples with sizes that range from the standard specimen size (i.e., 35mm dia.) up to a maximum of 70mm dia. Five automatic volume/pressure controller (PVC) with microprocessor-controlled syringe pumps assist with the precise regulation and measurement of the fluid pressures and volume changes needed to operate the cell. It can apply up to 10MPa coning pressure and 20MPa gas pressure.  Gas flow rate are measure with a high accuracy flowmeter. The software directly controls the cell- and back- pressures, testing rate, and data acquisitionThe cooling system was developed in this project with ability to control temperature from -15 °C to 20 °C and accuracy of ±0.5°C. The system can operate either under strain or stress control conditions.