Application of polymer flooding technology for enhanced oil recovery
Application of brine-initiated gelation of gellan for conformance control and water shutoff operations in field conditions was demonstrated. The developed technology was tested in Kumkol oilfield (Kyzylorda region, Kazakhstan) on five injection wells. According to the results of the first oilfield test, the amount of additionally recovered oil during 11 months (from October 1, 2013 till September 1, 2014) was equal to 5890 tons. In 2014, the JSC “NIPIneftegas” (Aktau city, Kazakhstan) carried out the second pilot test of polymer flooding technology on the same oilfield. The amount of additionally recovered oil during eight months (from October 2014 till May 2015) was equal to 8695 tons. The technology was tested for water shut-off purposes in producing well of Karabulak oilfield. After ten months treatment of production well the amount of water decreased 16 times in comparison with previous results.
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