Ahydrous oil-based cementing slurry (AOBCS) is one of the chemical agents, which can be effectively used for water shut-off in producing wells. This chemical agent is cement suspension in diesel fuel with surfactant, which helps adjust viscosity filtration loss, sedimentation properties and cement stone formation rate. Depending on cement particle size, AOBCSs fall into three categories: MICRO, MEDIUM, STANDARD. After being injected into a serviced well, AOBCS transforms, upon contact with water, into solid low-permeability stone, which doesn’t form, however, when exposed to oil. The agent is then easily washed out from the wellbore. The purpose of this paper is to develop methods for comparative laboratory evaluation of AOBCS’s capability to penetrate into porous medium.