World reserves of heavy and high-viscous oils exceed light and low-viscous reserves several times, and they are the most important part of raw materials base of petroleum industry, both in Russia and in a number of other oil-producing countries in the world. So, the development of high-viscosity oil pools receives increasing attention.
This work presents results of pilot tests of chemical EOR/IOR compositions, developed at Institute of Petroleum Chemistry Siberian Branch of RAS. The tests were held in 2014 on Permian-Carboniс deposit of Usinskoye oilfield. Five different technologies had been tested on 23 producing and 5 injection wells. Significant effect had been obtained at increasing oil production rate and decreasing watercut. By additional oil, effect was up to 800 tons per well, with a duration of effect of up to 9 months. The conclusion is drawn about the prospects of using enhanced recovery technologies for low-productive wells using oil-displacing compositions with controlled viscosity and alkalinity IHN-PRO, as well as acid composition GBK. These compositions are proposed for “cold” intensification of high-viscous oil recovery, as an alternative for thermal methods.
Large-scale industrial application of new technologies for enhanced oil recovery will extend the profitable operation of oilfields in the late stage of development, and oilfields with hard-to-recover hydrocarbon reserves could be involved in the development, including high-viscosity oil fields and deposits of the Arctic region.References
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