Characteristics and Breaking Conditions of Water-In-Oil Emulsions Based on Crude Oil from the Tailakovskoye Oil Field

IF 1.1 4区工程技术 Q3 CHEMISTRY, ORGANIC

Petroleum Chemistry Pub Date : 2025-07-04 DOI:10.1134/S0965544125600456

L. V. Ivanova, V. N. Koshelev, A. V. Dengaev, M. S. Sidibe

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Abstract

The physicochemical properties and group composition of crude oil from the Tailakovskoye oil field were examined. As the temperature was lowered from 50 to 10°C, the structural and mechanical properties of the 20, 40, 60, and 70% water-in-oil emulsions (WOEs) of this oil were characterized and investigated. The mean molecular weights and spectral characteristics were evaluated for the resins and asphaltenes isolated both from the crude oil under study and from the stabilizing layers of the emulsions. The average molecule of the stabilizing layer asphaltenes was found to have a higher molecular weight than that of the parent oil asphaltenes. It was further shown that the WOE viscosity abruptly increases with rising water cut, especially at low temperatures: at 10°C the viscosity of the 70% WOE exceeded that of the parent crude oil by a factor of over 50. This is associated with the strengthening of the protective interfacial films surrounding water droplets. The emulsion stabilizers were found to mainly consist of asphaltenes. IR spectroscopy showed that the asphaltenes isolated from the stabilizing layer had a greater content of condensed and aliphatic moieties than the resins and asphaltenes from the parent crude oil. Finally, the effect of ultrasonic treatment on the dispersion of the WOEs was investigated for different water contents. The greatest sonication effect was observed for the WOEs with high water cuts.

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泰拉科夫斯科耶油田原油油包水乳状液特征及破乳条件

对泰拉科夫斯科耶油田的原油进行了理化性质和族组成分析。当温度从50℃降至10℃时，对该油的20%、40%、60%和70%油包水乳剂的结构和力学性能进行了表征和研究。对从原油和乳液稳定层中分离出的树脂和沥青质的平均分子量和光谱特性进行了评估。稳定层沥青质平均分子质量高于母油沥青质。进一步表明，随着含水率的升高，WOE粘度突然增加，特别是在低温下：在10°C时，70%的WOE粘度超过母体原油的粘度50倍以上。这与水滴周围的保护界面膜的强化有关。乳液稳定剂主要由沥青质组成。红外光谱分析表明，从稳定层分离出来的沥青质比从原油中分离出来的树脂和沥青质具有更高的缩合和脂肪基团含量。最后，研究了不同含水量下超声处理对酸盐分散性能的影响。声波效应最大的是含水率高的井。

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来源期刊

Petroleum Chemistry 工程技术-工程：化工

CiteScore

2.50

自引率

21.40%

发文量

102

审稿时长

6-12 weeks

期刊介绍： Petroleum Chemistry (Neftekhimiya), founded in 1961, offers original papers on and reviews of theoretical and experimental studies concerned with current problems of petroleum chemistry and processing such as chemical composition of crude oils and natural gas liquids; petroleum refining (cracking, hydrocracking, and catalytic reforming); catalysts for petrochemical processes (hydrogenation, isomerization, oxidation, hydroformylation, etc.); activation and catalytic transformation of hydrocarbons and other components of petroleum, natural gas, and other complex organic mixtures; new petrochemicals including lubricants and additives; environmental problems; and information on scientific meetings relevant to these areas. Petroleum Chemistry publishes articles on these topics from members of the scientific community of the former Soviet Union.