FIELD: mining.
SUBSTANCE: method involves injection of working agent over injection wells, withdrawal of oil via production wells and periodic injection of viscosifier solution with decreasing concentration via injection wells. Working agent is a heat carrier. For viscosifier solution injection in the first rim viscosifier solution with viscosity lower in multiples than minimal viscosity of high-viscosity oil is applied. In the second rim and all further rims viscosifier solution with viscosity lower in multiples than minimal viscosity of viscosifier solution in the previous rim is applied. Afterwards, dissolvent for high-viscosity oil is injected.
EFFECT: increased oil yield of a pool.
1 ex
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