Deep Eutectic Solvents for Sustainable Management of Asphaltene Deposition in Oil Production

S.B. Ryspaeva, Aigul Kerimkulova, Kh. S. Rafikova, Saule Z. Nauryzova, Sholpan Islam, Murat Aydemir, M.A. Kozhaisakova

2024

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DOI 10.30919/es1102
Data confidence 70 medium
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Abstract

Deep Eutectic Solvents (DES) offer a sustainable solution to mitigating asphaltene deposition in oil production, minimizing environmental impact and enhancing the operational efficiency in the petroleum industry.The paper investigates the sustainable management of asphaltene deposition in oil production through the application of Deep Eutectic Solvents (DESs).Three DES formulations were prepared: DES1 (Citric acid:Glycerin, 1:4 ratio), DES2 (Citric acid:Ethylene Glycol, 1:4 ratio), and DES3 (Choline chloride:Glycerin, 1:2 ratio).The physical properties (pH, density, and viscosity) of these DESs were measured.The study utilized Karazhanbas crude oil from Western Kazakhstan, characterized by distinct hydrocarbon groups.The weight composition was as follows: Paraffin-naphthenic 17.2%, Aromatic (light) 10.2%, Aromatic (medium) 8.1%, Aromatic (heavy) 28.2%,Total resins 24.1%, and Asphaltenes 12.2%.The FTIR spectrum of the received DES and asphaltene was also determined.Asphaltene deposition was studied both with and without DES inhibitors.Microscopic tests revealed that DES3 exhibited superior results, as evidenced by significantly smaller asphaltene particle sizes compared to other DES formulations and the control without DES.The findings suggest that DES3 holds promise as an effective inhibitor for asphaltene deposition in oil production, offering a sustainable and environmentally friendly approach to address challenges associated with asphaltene-related issues in the petroleum industry.