A SIMPLE METHOD TO CALIBRATE THE TEMPERATURE EFFECT FOR THE CALCULATION OF GAS PERMEABILITY

Temperature plays an important role in the gas permeability test. A small tempera-ture variation still exists in the experimental process since the temperature control device cannot strictly maintain a constant temperature. This can further affect the accuracy of the gas permeability. To solve this problem, a simple method based on the ideal gas equation of state is introduced to calibrate the gas pressure variation because of the temperature effect. We verified the calibration results through sever-al examples, and the results proved the feasibility and effectiveness of the method. In particular, this method is particularly effective for low permeability materials in long-term gas permeation tests.