The Serbian Oil Industry (NIS) has announced a tender, expiring on August 4, for constructing a system to test supplementary oil recovery methods at the Velebit oil field, Serbia’s largest, located in Kanjiža.
Discovered in 1968 and exploited since 1985, the Velebit field will undergo a pilot project aimed at increasing production by injecting a surfactant-polymer (SP) mixture into three new injection wells. This method is expected to boost oil output from seven reactive wells.
The SP method enhances recovery from mature oil deposits by using surfactants to reduce the interfacial tension between oil and water, facilitating oil extraction from rock pores. Polymers increase the viscosity of injected water to more effectively push trapped oil toward production wells, reducing water bypassing oil.
Currently, Velebit produces 592 tons of oil per day, with a water cut of 85 percent and daily dissolved gas production of 15,497 cubic meters. The project has two phases: the first phase, to be completed by December 2026, focuses on optimizing injection parameters; the second phase, extending to 2041, aims to increase the oil recovery factor by 7.5 percent and boost production.
