Key words: associated gas utilization, gas injection, miscible displacement, oil recovery increasing.
International experience analysis of the gas injection technologies implementation as the enhanced oil recovery method indicates a high degree of the success in the context of the increased oil recovery. The relation between the extra oil recovery and the volume of associated gas injected as well as the relation between the extra oil recovery and the methane fraction in the associated gas were obtained in the course of the works. Assessment of the technical and economic efficiency of the associated gas injection implementation on Gazprom neft JSC oil fields for the purpose of enhanced oil recovery was carried out.
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