Implementing SEM, Image-Pro-plus and SPSS software for discovery of moisture influence on shale pores

Summary After the preparation of shale sample including polish and water equilibrium experiments, we take advantage of SEM technique to acquire original and dehydrated captures of chip shale processed under different moistures, count pore data and remarkable lengths with Image Pro plus visually and analyze statistical parameters on the basis of SEM pictures, then calculate changing ratio between original and processed parameter values under different moistures, in order to get a visual trend, curves of changing ratio with moisture are drawn, we discover complicated moisture influence pattern of organic pores and inorganic pores, two types of pores get influenced, this pattern can explain the increase of wellhole instability and earthquake risk.