The enhanced development of high-viscosity oil reserves is very topical issue. One of the most important problems is selecting effective technologies and optimal strategy of high-viscosity oil recovery. The selection of the most effective technologies requires full-scale research, an integral part of which is laboratory testing.
The article describes the results of core flow studies to study the high-viscosity oil displacement efficiency by various agents. The research target was the productive high-viscosity oil reservoir of an oil-gas-condensate field in Western Siberia. Experimental screening of potential technologies based on thermal, chemical, and thermochemical methods has been performed under various reservoir conditions of the studied target. As displacement agents we used non-heated water, hot water, polyacrylamide solution, surfactant solution, and alkaline solution. The experiments were carried out on a specialized laboratory stand using the core material and reservoir fluids from the studied reservoir. In total, 18 flow experiments were carried out and 6 technologies were tested. According to the research results, it was found that for the studied reservoir injection of hot water and injection of hot water in combination with a polymer slug (thermo-polymer flooding) are the most effective recovery methods. These methods will be considered as priorities for further pre-design study and pilot tests. Also, based on the research results, proposals were formed for additional laboratory studies (including the selection of a polymer) as part of further substantiation of effective technology for high-viscosity oil production.
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