Abstract

When afraction of scavenger petroleum reserves is steadily growing the use of methods for oil recovery increasing and intensifying of oil fields development plays a decisive role in maintaining the level of oil production. One of the methods used to increase oil recovery by isolating water inflows is the injection of a surfactant composition on a hydrocarbon base, SNPCH-9633 reagent. The action of the reagent is based on the formation in washed zones of of highly viscous gel-like W/O emulsions due to the crushing of aqueous phasedroplets. Thus W/O emulsion generated in the pore space of the formationblocks the water-saturated interlayers which leads to a reduction in water cut of the produced well production by 10-30% depending on the application conditions. The method is selective technological and easy to implement. The reagent SNPCH-9633 has a low viscosity and does not change its properties when stored over a wide temperature range for a long time. In this work using the visualization methods the features of emulsion generation during water and reagent movement in a porous structure, the manifestation of the dynamic blocking phenomenon and the rheological properties of emulsions in a wide range of aqueous phase concentrations are studied.