METHOD FOR BALANCING INJECTION WELL WATER-INTAKE CAPACITY PROFILE AND RESTRICTION OF WATER INFLUX TO PRODUCTION WELLS Russian patent published in 2012 - IPC E21B43/22 E21B43/32 C09K8/84 

FIELD: oil and gas industry.

SUBSTANCE: in method for balancing of injection well water-intake capacity profile and restriction of water influx to production wells, which involves pumping to the formation of gel-forming composition containing, wt %: sodium silicate 1-10, chrome acetate 0.5-2, water is the rest, pumping of the above composition to formation, technological pause, prior to pumping of the above composition to wells there pumped is fresh water; induction period of gel-forming composition at formation temperature is set so that it is equal to 6-10 hours, and technological pause is chosen so that its duration is equal to 24-36 hours.

EFFECT: improving the efficiency of oil displacement from formation due to water isolation of highly water-flooded formations in production wells either due to equalising the water-intake capacity profile of injection wells by partial or complete blocking of highly washed channels or interlayers for movement of injection water.

1 ex, 2 dwg