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Biocatalysis of oil-displacing systems in low-temperature reservoirs
5th World Congress on Petrochemistry and Chemical Engineering
December 05-07, 2016 Phoenix, USA

L I Svarovskaya and L K Altunina

Institute of Petroleum Chemistry Siberian Branch- RAS, Russia

Posters & Accepted Abstracts: J Pet Environ Biotechnol


The enzymatic hydrolysis of carbamide contained in an oil-displacing system by the action of vegetable urease has been studied. The degree of hydrolysis in different versions of the experiment was determined by pH changes with time. Optimal ratios of carbamide to natural urease-containing sources have been determined for the intense hydrolysis accompanied by the release of CO2, which reduces the viscosity of crude oil, and ammonia, which generates an alkaline buffer system, thereby increasing the detergent properties of the system. The effect of hydrolysis products on the rheological characteristics of high-viscosity oil from Usinskoye oil field has been investigated. The displacement of viscosity of oil from a reservoir model with the oil-displacing system and urease has been investigated. When the enzymatic hydrolysis of carbamide by urease or soybean meal is employed in the process of oil displacement from a reservoir model the absolute oil displacement efficiency increases to 64.6 or 74.7%, respectively. Thus, the injection in a reservoir of an oil-displacing system containing both carbamide and a hydrolyzing enzyme leads to in situ generation of an effective system capable of increasing the displacement efficiency of viscosity oil in the low-temperature deposit. The data obtained forms the scientific basis for biotechnology of enhanced oil recovery.

Biography :

Email: sli@ipc.tsc.ru