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Enhancement of Oil Recovery (EOR) by Ionic Liquid Assisted Low Salinity Water in Carbonate Reservoir

    Authors

    1 Chemical Engineering Department, College of Engineering, University of Baghdad, Baghdad, Iraq

    2 Chemical Engineering Department, College of Engineering, University of Baghdad, Baghdad

    3 Petroleum Research and Development Center. Baghdad, Iraq

,

Document Type : Research Article

Abstract

Carbonate rocks hold approximately 40% of the world's oil. Due to their low waterflood recovery rates, these reservoirs are ideal candidates for enhanced oil recovery (EOR) methods. Chemically enhanced oil recovery (CEOR) techniques, such as surfactant flooding, can increase these reservoirs’ output by modifying wettability and decreasing interfacial tension (IFT). This study explored ionic liquids (ILs), a new type of surfactant, and their potential effects on wettability and IFT reduction. The study initially involved the experimental assessment of the interfacial tension and wettability, using the pendant drop and contact angle. The results reveal that this surfactant changes the wettability from 98◦ to 28◦ and the interfacial tension (IFT) from 3.13 to 1.25 dynes/cm at 250 ppm. Core flooding tests were conducted to examine the effect of ionic liquid concentration on the ultimate oil recovery from the carbonate oil reservoir's core plug. The outcomes reflected extra oil recoveries of 17% and 19.7% OOIP for 50 and 250 ppm, respectively at a flow rate of 0.667 cm3/min, respectively. Core flooding tests achieved an additional recovery of 10.5% OOIP at a flow rate of 1 cm3/min, using the highest ionic liquid concentration. 

Keywords

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       DOI 10.1007/s13202-014-0147-5
Kerbala Journal for Engineering Sciences
Volume 4, Issue 2
June 2024
Pages 141-158
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