Water and gas mixture characteristics calculation and its possible injection variants

The aim of this article is the practical application of calculation methodology of water and gas volume injection into the reservoir and optimal parameters of water and gas mixture in Samodurovskoe field in Russia. Calculations were performed using two technologies: water alternating gas (WAG) and simultaneous water and gas injection (SWAG). For each case the optimum volume of water and gas mixture and its components which are injected into the reservoir was calculated. The variant of alternative water and gas injection cannot be applied in oilfield because of existing restriction to maximum flowrate of associated gas in standard conditions. In Samodurovskoe field can be applied water-alternated-gas (WAG) technology. Proper array of gas and water ration phases in reservoir condition with account of associated gas usage was calculated. Optimization of water-gas mixture volume ratio components showed that the biggest effectiveness of oil recovery cannot be reached resulting from abovementioned restriction. This calculation methodology can be used in job execution, it is simple and practical. © Published under licence by IOP Publishing Ltd.