Laboratory study on the effect of using HPAM polymer to improve the efficiency of flooding operations for enhanced oil recovery
Subject Areas :
1 -
Keywords: Oil Recovery Factor, Waterflooding Operation, HPAM Polymer,
Abstract :
The use of polymers to increase oil recovery is an advanced and efficient method employed to improve the productivity of oil reservoirs. This technique helps reduce the interfacial tension between water and oil in the reservoir, thereby aiding in enhanced oil recovery. Polymers are used as viscosity modifiers in the injected water, which prevents the water from flowing too easily through the reservoir and helps in displacing the oil. These properties are particularly useful for reservoirs with low viscosity or those that do not respond well to conventional water flooding. Additionally, polymers act as mobility control agents by increasing the viscosity of the displacing fluid and reducing its mobility, which improves the sweep efficiency and oil displacement. The experimental results of this study indicate that the use of hydrolyzed polyacrylamide (HPAM) polymer in the presence of formation water significantly enhances oil recovery by controlling the mobility of the displacing fluid. It increases the oil recovery factor by approximately 7% compared to conventional formation water injection. Among the injection scenarios tested, the highest oil recovery factor of 66% was achieved with the injection of hydrolyzed polyacrylamide polymer in the presence of calcium chloride brine. This is because the presence of salt reduces the viscosity of the polymer solution, which improves the mobility control of the displacing fluid.
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