FIELD: oil production, particularly to stimulate highly-viscous oil production.
SUBSTANCE: method involves injecting heat-carrier and aqueous-polymeric composition plugs trough injection wells, wherein aqueous-polymeric composition temperature is less than that of heat-carrier; extracting oil through producing wells. The aqueous-polymeric composition is polyacrylamide suspension, wherein solid polyacrylamide is previously treated with ionizing radiation with 3-10 Mrad dose. Polyacrylamide has concentration of 0.5-2% and temperature, which is 5-50° below heat-carrier temperature. The plug injection cycles are repeated.
EFFECT: increased efficiency of highly-viscous oil production from reservoir having non-uniform permeability.
2 ex, 1 tbl
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