%0 Journal Article %T The problem of high viscosity oil production in heterogeneous reservoirs %A Abutalieva, I.. %A Subbotina, E.. %K high viscosity oil, heterogeneous reservoirs, methods of enhanced oil recovery, hard-to-recover reserves, steam assisted gravity drainage %J Oil and gas technologies and environmental safety %D 2025 %N 2025 %P 8 %I Astrakhan State Technical University