COMPOSITION FOR REDUCING OIL VISCOSITY IN LOW-TEMPERATURE DEPOSIT CONDITIONS Russian patent published in 2012 - IPC C09K8/582 C09K8/584 

FIELD: chemistry.

SUBSTANCE: invention relates to the oil extraction industry and specifically to a composition for reducing oil viscosity and increasing reservoir recovery in low-temperature oil reservoir conditions using microorganisms. The composition for reducing oil viscosity in low-temperature deposit conditions is based on an oil-displacing composition which contains ammonium nitrate, a surfactant, carbamide and water, where an aqueous urobacteria extract is added to the composition, said extract containing 800-840 million cells/ml, obtained by constantly stirring for 120 minutes the mass of manure cake in water in ratio 10:100 respectively, with the following ratio of components, g/l: ammonium nitrate 14-142, nonionic surfactant AF_9-12 or NP-40 or NP-50 4.8-48, anionic surfactant - volgonat or sulphonol 2.4-24, carbamide 28.6-286, said aqueous urobacteria extract 20-50 ml/l, water - the balance up to 1 l.

EFFECT: high efficiency of recovery of high-viscosity oil in conditions of a high-viscosity oil deposit with low reservoir temperature (+10 - +50), cutting costs while eliminating steam-thermal effect.

21 ex, 4 tbl, 3 dwg