Geological and technological substantiation of waterflooding systems in deposits with hard-to-recover reserves

Abstract

Abstract The study of the process of developing oil reserves in one of the fields with hard-to-recover reserves of the Tournaisian stage of the Volga-Ural oil and gas basin. A significant increase in the oil recovery factor was established when using in-circuit waterflooding as compared to the development of deposits in natural mode. The influence on the degree of reserves recovery is shown by the density of the grid of wells, geological heterogeneity, the sweep efficiency by injection by thickness, variations in the injectivity profile in injection wells. Models are proposed to assess the parameters of the efficiency of waterflooding systems.