Water-shut-off polymeric composition for low-permeable reservoirs

Authors: M.K. Rogachev, A.O. Kondrashov (National Mineral Resources University, RF, Saint-Petersburg), O.F. Kondrashov (Ufa State Petroleum Technological University, RF, Ufa)

Key words: polymeric composition, water-shut-off, surfactant, low-permeable reservoir.

The article presents the results of research of developing a polymeric composition for intrastratal water-shut-off in low-permeable reservoirs.Polymeric compositions (aqueous alkaline solutions of hydrolyzed akril-contain polymer) were selected as objects of the study with the addition of the nonionic surfactant with hydrophobic properties (this surfactant is the reaction product of unsaturated fatty acids with amines and their derivatives).As a result of complex research, new hydrophobized polymeric composition was designed, brought to the industry and recommended for use in intrastratal water-shut-off in low permeable reservoirs. Compared with a conventional aqueous acrylic polymer, developed polymer composition reduces pressure injection into the reservoir and increases the residual resistance factor.