THEORETICAL ANALYSIS AND EXPERIMENTAL STUDY ON RELATION BETWEEN ROCK PERMEABILITY AND TEMPERATURE
岩石渗透率与温度关系的理论分析和试验研究

The physicochemical and structure properties of rock will change obviously under high temperature, which causes extending of fracture,dehydrating and vaporizing of mineral and changes of rock porosity and permeability. Based on thermo-elastic theory and column test results,the positive index relationship between rock permeability and temperature was deduced,and temperature threshold value was validated theoretically. When temperature begins to increase,the rock permeability increases slowly. When the temperature increases to a certain value,the speed of permeability rising increases rapidly;and this temperature is called initiation threshold value. After the temperature initiation threshold,the permeability of the rock rises quickly. The study of the relationship between rock permeability and temperature offers the theoretical foundation for the studying of multi-field coupling question under the high temperature. It gives theoretical support for permeability of petroleum thermal exploitation and for nuclear waste safety disposal.