Ways of influencing the bottom zone of the productive formation to increase oil production

摘要

FIELD: oil and gas industry.;SUBSTANCE: invention refers to oil industry, particularly to sediment-gel-forming technologies of oil production from non-uniform reservoirs at late stage of development of oil deposits with utilisation of polymer of acrylic row. The method of effect onto a bottomhole zone of a producing reservoir for increasing production of oil consists in pumping aluminium hydroxochloride, a buffer layer of fresh water in volume of flow string, solution of acrylic row polymer, and the second buffer layer of fresh water, in holding during 24 hours, further in followed pumping of calculated volume of acid; notably, as said solution there is used polymer composition - reagent of SAS or the said reagent together with non-ionogenic SAS neonol AF_9-12; after the said second buffer layer additional pumping of aluminium hydroxochloride is carried out in volume of 70% from total volume of aluminium hydroxochloride pumping.;EFFECT: increased efficiency of complex effect both to reservoir and to bottomhole zone with sediment-gel-forming composition by means of leveling profile of saturation or influx in producer and due to year-round utilisation regardless of environment temperature.;3 ex, 4 tbl