FIELD: oil industry.
SUBSTANCE: invention relates to oil industry, specifically to intensification of oil production technology to increase final oil recovery factor. Method for treatment of bottomhole formation zone (BFZ) includes sequential treatment of BFZ with an invert-emulsion solution (IES), oil viscosity and acid composition. IES contains, vol%: emulsifier 2; diesel fuel 20; process water - balance. Acid composition contains, vol%: 30 % hydrochloric acid 63.5; diethylene glycol 8.5; acetic acid 3.4; water repellent based on amides 1.7; corrosion inhibitor 1.7; process water - balance. IES limits water inflow by artificial reduction of permeability of highly washed formation zones. Oil fringe is buffer and provides prevention of interaction of IES with acid composition at pumping into well and forcing into BFZ. Acid composition provides oil washing, increased diameter of pore channels and transmitting capacity of low-permeable sections of bottomhole formation zone.
EFFECT: technical result is additional oil production, higher efficiency of wells due to reduced share of water in produced fluid separation film of oil and involvement in development of low-permeable intervals of bottomhole formation zone (BFZ).
7 cl, 5 dwg
