FIELD: oil industry.
SUBSTANCE: invention relates to compositions that ensure the colloidal stability of oil in reservoir conditions, in particular, when pumping CO2, and can be used in production, transportation and storage of oil. Composite inhibitor of the deposition of petroleum asphaltenes for the processes of injection of CO2 into the reservoirs includes, wt.%: heavy pyrolysis resin 50-60; xylene 37-48; nonylphenol 2-5.
EFFECT: inhibition of asphaltene precipitation with an efficiency of more than 80% when adding an inhibitor in an amount of 5.0-10.0 wt.% relative to the amount of carbon dioxide CO2, expanding the range of devices.
1 cl, 3 tbl, 38 ex
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