ACCOUNTING FOR PRODUCTIVE DEPOSITS HETEROGENEITY IN GEOLOGICAL MODELILING IN ORDER TO IMPROVE AN EFFICIENCY OF WATER-ALTERNATED-GAS INJECTION ArticleStrakhov P.N., Belova A.A., Markelova A.A., Strakhova E.P.Neftyanoe Khozyaystvo - Oil Industry. Vol. 2021. 2021. P.. 46-49