FIELD: oil, gas and coke-chemical industries.
SUBSTANCE: invention relates to methods for development of ultraviscous oil deposit. Method for development of ultraviscous oil deposit by steam-gravity drainage together with solvent includes steam injection into formation, bed heating with creation of steam chamber, combined pumping of hydrocarbon solvent and steam and product selection with temperature support in steam chamber at the specified level. At that, combined pumping is performed at weight ratio of hydrocarbon solvent to steam equal to 1:(2.2–10.9), depending on content of aromatic fraction in solvent.
EFFECT: technical result is higher efficiency of extraction of ultraviscous oil by steam-gravity drainage together with solvent, reduction of material costs at combined injection of steam and hydrocarbon solvent due to optimization of ratio of injection of hydrocarbon solvent and steam.
1 cl, 3 tbl, 1 ex
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