Test method and experimental research on resistance of oil shale under high temperature

Heating the oil shale by current underground to accomplish in-situ transformation process , is a viable direction. The electrical properties of oil shale under different temperatures , especially the resistance , become important. Charging oil shale underground to heat oil shale till kerogen's decomposition temperature , then crude oil and other gases can be generated. The resistance of the oil shale samples was measured by Direct Current ( DC ) quadripole method to find out the variation rules of resistance value. In the experiments , oil shale pres- ented its semiconductor property. When heated till 350℃ -450℃ , its resistance changed greatly , optional for heating and cracking. The porosity , oil content , media and composition affected the resistance largely.