Non-stationary effect of thermoactive polymer composition for deep leveling of filtration profile

Abstract

A new technology has been developed to stimulate a reservoir making use of a thermoactive polymer composition. The cyclic injection of the reagent allows you to change the direction, speed of flow, create non-stationary waveform pressure. Under the influence of shifts of positive and negative pressure drops in the formation occurs redistribution of formation fluids, reduction of capillary pressures and the presence of a working agent in oil-saturated low-permeability zone. It has been experimentally established that with a non-stationary effect of the proposed composition, the filtration profile is levelled due to the deep penetration of the composition into the formation and an increase in the residual resistance factor of high water cut zones. Experimentally determined growth coefficient of displacement for stratified heterogeneous formation with overflows reaches 19.5%. Keywords: Thermoactive polymer composition, non-stationary action, flow, capillary pressure, water cut zones