FIELD: oil and gas industry.
SUBSTANCE: invention refers to oil and gas industry and can be used at evaluation of the type of a solution not upsetting the filtrating properties of rock. The essence of the method of evaluation of influence of process liquid filtrates penetration on filtering characteristics of rock is based on determining a water and residual water volume in a sample. If contents of water in the sample is lower than that of residual water, then it is considered that adsorption of chemical reagents on the surface of rock causes reduction of permeability; if then contents of water in the sample is higher than residual water then diffused layers cause reduction of permeability.
EFFECT: maintaining filtration characteristics of a well bottomhole.
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