Nowadays the oil and gas industry is focused on the development of hard-to-recover oil reserves, including the extraction of gaseous and liquid hydrocarbons from unconventional sources - gas hydrates, bituminous sandstones, deposits of coal and shale, while gas production of the latter is already industrial. Such objects also include the Bazhenov suite of the studied field. Oil production currently flows, in particular, to the total flow of the field conventional produced fluid to the booster pump station from the preliminary water discharge unit and the central water discharge station of the oil preliminary treatment unit.
The article presents the study results of the mixture treatment process of the Bazhenov suite oil and conventional reservoirs oil at various ratios in conditions of observance the technological regime of oil treatment facilities in the studied field. Demulsifiers have been identified, providing the mixtures required dehydration degree of the Bazhenov suite oil and conventional oil at various compositions in oil treatment facilities of the studied field, providing the required quality of oil and discharged water in terms the content of residual oil products and mechanical impurities. The study results of the oil treatment process when changing the mixture composition of the Bazhenov suite oil and conventional oil as a result of hydraulic fracturing operations performing are presented. It was found that the most effective reagents for the separation of oil-water emulsions, depending on the mixture ratio of the Bazhenov suite oil - conventional oil of the studied field, are demulsifiers Reagent 6 (at a dosage of 19.0 g/t), Reagent 9 (24.9 g/t), Reagent 11 (25.0 g/t), Reagent 12 (24.4 g/t), Reagent 2 at a dosage of 21.3 (g/t).
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