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Effect of the Polymer Concentration and Slug Combination on Oil Displacement Efficiency

Yang Jun

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Abstract

On the simulation of polymer flooding conditions in Daqing oil field,the effect of concentration and slug combination of high molecular weight polymer on oil displacement efficiency is studied by laboratory experiment.The experimental results show that,under the condition of the same total amount of polymer,polymer flooding recovery will increase with the increase of high molecular weight polymer concentration.Using injection scheme which is small slug and continually lowering polymer solution viscosity,the extent of improving recovery is the largest,polymer flooding recovery can reach 40.12%,and the ultimate recovery can reach 80.48%.

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What this paper is about

On the simulation of polymer flooding conditions in Daqing oil field,the effect of concentration and slug combination of high molecular weight polymer on oil displacement efficiency is studied by laboratory experiment.The experimental results show that,under the condition of the same total amount of polymer,polymer flooding recovery will increase with the increase of high molecular weight polymer concentration.Using injection scheme which is small slug and continually lowering polymer solution viscosity,the extent of improving recovery is the largest,polymer flooding recovery can reach 40.12%,and the ultimate recovery can reach 80.48%.

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Available abstract

On the simulation of polymer flooding conditions in Daqing oil field,the effect of concentration and slug combination of high molecular weight polymer on oil displacement efficiency is studied by laboratory experiment.The experimental results show that,under the condition of the same total amount of polymer,polymer flooding recovery will increase with the increase of high molecular weight polymer concentration.Using injection scheme which is small slug and continually lowering polymer solution viscosity,the extent of improving recovery is the largest,polymer flooding recovery can reach 40.12%,and the ultimate recovery can reach 80.48%.

Key concepts: Polymer, Slug, Polymer solution, Enhanced oil recovery, Displacement (psychology), Viscosity, Materials science, Petroleum engineering

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