FIELD: oil field exploitation. SUBSTANCE: core is lifted from well. Samples are manufactured from it. Chemical reagents of various concentrations are pumped through samples of core. Sections are prepared from samples of core. These sections are manufactured from samples of core on sides of inlet and outlet of pumped-through chemical reagents. Then sections with preserved structure of rock are selected. Ratio of number of pores in sections on side of inlet of chemical reagent to number of pores in sections on side of outlet of chemical reagents is determined. Later optical concentration of chemical reagents for treatment of productive pool is found. It is determined by maximal ratio of number of pores in sections. EFFECT: enhanced efficiency of action on face zone. 3 dwg
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