Enhanced oil recovery in water-flooded and hard to recover reservoirs

Abstract

The article is devoted to enhanced oil recovery (EOR) by displacement of residual oil with chemical agents in hard to recover reservoirs. SOCAR Oil Refinery alkaline waste (AW) is used as chemical product for EOR in the researches. Researches were carried out on pure AW and its solutions in different densities. 10% solution of water with AW decreases interfacial tension from 27 mN/m to 1.0 mN/m. PH value respectively increases from 7.5 to 9.5. Then, the researches were performed in simulated reservoir model. Primarly, the interlayer was created from solutions with AW in different densities, and then the displacement was carried out. Final oil recovery rate was 0.453 during oil displacement without AW. This ratio was respectively 0.54, 0.571 and 0.573 during displacement of oil with 5%, 10%, 15% solutions of AW. EOR with AW solution was carried out in QLD4 horizon in Goshanohur area of Balakhany-Sabunchu-Ramana oil field. 2500 tons incremental oil was produced. Keywords: enhanced oil recovery; residual oil; oil displacement; oil field; well.

A Review Study on an Integrated Method for Solving Problems Associated With the Re-Development of Waterflooded Fields

“…The developed model enabled a more precise determination of the oil recovery factor during waterflooding. Kazimov considered a method of enhanced oil recovery by displacing residual oil with chemicals in hard-to-recover fields [8].…”