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Salym Petroleum pilots enhanced oil recovery in Western Siberia

05th June 2014

Salym Petroleum Development (SPD) and Stroytransgaz-M (STGM) signed a contract for construction of an ASP mixing unit at the West Salym oil field in Khanty-Mansi Autonomous Okrug – Yugra

Salym Petroleum pilots enhanced oil recovery in Western Siberia
The implementation of ASP makes it possible to additionally produce up to 30 per cent of oil that remained after traditional waterflood

The alkaline surfactant polymer (ASP) mixing unit is designed to prepare a mix of alkali, surfactant and polymer. These components are used in chemical flooding – a promising innovative enhanced oil recovery technology. The implementation of ASP makes it possible to additionally produce up to 30 per cent of oil that remained after traditional waterflood. Since 2013 SPD is realising an ASP pilot project at the Salym group of oil fields, including construction of seven wells, ASP pipeline and ASP mixing unit.

According to the contract, ASP mixing unit will be put into operation at the start of 2015.

In the ASP process, low concentrations of surfactant are used to achieve ultra-low interfacial tension between the trapped oil and the injection fluid/formation water. The ultra-low interfacial tension also allows the alkali present in the injection fluid to penetrate deeply into the formation and contact the trapped oil globules. The alkali then reacts with the acidic components in the crude oil to form additional surfactant in-situ, thus, continuously providing ultra-low interfacial tension and freeing the trapped oil.

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