Abstract
Summary This paper focuses on the results of water shutoff operations using polymer gel in the Kelebija oil field. The methodology of candidate wells’ selection and the manner of performing the operation will also be included. The Kelebija oil field is characterized by a complex reservoir system with heterogeneous layers of different permeability and dual porosity with a strong waterdrive aquifer, which led to the early breakthrough of water. For the last 25 years, the average water cut was above 90%. Implementation of water shutoff operations began in 2019 and was performed on seven wells with an 85.7% success rate. It proved to be very effective with a water-cut reduction from 23% to as much as 72%. The average water cut for the entire Kelebija oil field has dropped by 12% and oil production increased by 210%.
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