Abstract: The experimental study has revealed that the clay composition and its content in rock samples,the number of the linkable minipore in cement and the difference of the surface properties of rock samples are the key factors of retro-mercurometric efficiency.In view of the development of oil/gas pools,the retro-mecurometric efficiency wouldtake rising trend along with the increasing depths of oil/gas pools and show good corresponding relations with the pores,permeabilities and water-sensitivities of rock samples.