4.7 Article

Green Enhanced Oil Recovery for Carbonate Reservoirs

期刊

POLYMERS
卷 13, 期 19, 页码 -

出版社

MDPI
DOI: 10.3390/polym13193269

关键词

green enhanced oil recovery (GEOR); green surfactant-polymer (SP) flood; carbonates; microbial enhanced oil recovery (MEOR)

资金

  1. College of Petroleum and Geosciences (CPG) Start-Up Fund [SF19005]

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Green enhanced oil recovery (GEOR) is an environmentally friendly technique that improves oil recovery efficiency by injecting specific green fluids to increase residual oil production. Studies have shown that certain green SP formulations can significantly enhance residual oil production in carbonate cores, such as a mixture of APG, XG, and butanone.
Green enhanced oil recovery (GEOR) is an eco-friendly EOR technique involving the injection of specific green fluids to improve macroscopic and microscopic sweep efficiencies, boosting residual oil production. The environmentally friendly surfactant-polymer (SP) flood is successfully tested in a sandstone reservoir. However, the applicability of the SP method does not extend to carbonate reservoirs yet and requires comprehensive investigation. This work aims to explore the oil recovery competency of a green SP formulation in carbonate through experimental and modelling studies. Numerous formulations of SP with ketone, alcohol, and organic acid are selected based on phase behavior and interfacial tension (IFT) reduction capabilities to examine their potential for enhancing residual oil production from carbonate cores. A blending of nonionic green surfactant alkyl polyglucoside (APG), xanthan gum (XG) biopolymer, and butanone recovered 22% tertiary oil from the carbonate core. This formulation recovered more than double residual crude than that of the APG, XG, and acetone. Similarly, a combination of APG, XG, acrylic acid, and butanol increased significantly more oil than the APG, XG, and acrylic acid formulation. The APG, XG, and butanone mixture is efficient with regards to boosting tertiary oil recovery from the carbonate core.

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