Formation of concentrated emulsions in heavy oil

Malkin, A. Ya.; Zadymova, N. M.; Скворцова, З. Н.; Traskine, V.; Куличихин, В. Г.

doi:10.1016/j.colsurfa.2016.05.094

Cited by 20 publications

(7 citation statements)

References 13 publications

(20 reference statements)

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“…31 Emulsification of heavy crude oil with the formation of o/w emulsions as an effective method for reduction of its viscosity was experienced in our previous work, and the surfactant choice and formation of the definite emulsion morphology were stressed as determining factors. 32,33 In this paper, continuing these studies, we present the results of experiments involving a wide spectrum of surfactants and stabilizing polymer additives as the base for choosing an optimal composition to provide the rheological properties and stability of heavy-oil-based emulsions.…”

Section: Introductionmentioning

confidence: 98%

Modifying the Viscosity of Heavy Crude Oil Using Surfactants and Polymer Additives

et al. 2018

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A systematic study of the influence of surfactant and stabilizing polymer additives on the rheological properties of heavy oil was carried out. The aim was to optimize the recipe for the most effective reduction in the oil viscosity. A total of 41 versions of the emulsion were prepared using different protocols. Creation of the emulsions with different recipes and modes of mixing led to a regulation of their morphologies, which determined the rheological properties of the final products. In all cases, emulsification resulted in a transformation of the oil from Newtonian behavior to a viscoplastic medium with a blurred yield stress. Dependent upon the composition, the yield stress was decreased up to 0.6 Pa and the viscosity at high shear obtained a value up to 50 mPa s, which is lower than the viscosity of crude oil by 34 times. The efficiency of the viscosity reduction increased with a decreasing temperature.

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Section: Introductionmentioning

confidence: 98%

Modifying the Viscosity of Heavy Crude Oil Using Surfactants and Polymer Additives

et al. 2018

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“…Uma vez emulsionado, o óleo pesado é de fácil bombeamento, visto que o petróleo é transportado na forma de gotículas dispersas em água, o que o ajuda a fluir mais facilmente através das tubulações. A fraca interação entre as gotas de óleo dispersas torna o sistema final (emulsão O/A) significantemente menos viscoso (Malkin et al, 2016). Além disso, durante o transporte do petróleo na forma emulsionada, há um menor contato entre o óleo pesado e a tubulação, o que implica em uma menor probabilidade de ocorrer corrosão, perda de carga e precipitação de compostos indesejáveis no interior das tubulações (Ahmed et al, 1999;Zaki, 1997).…”

Section: Introductionunclassified

Agentes emulsificantes aplicados à estabilização de emulsões o/a com intuito de melhorar o transporte de óleos pesados através das tubulações: Um estudo bibliométrico

Siqueira

Meneguelo

Araújo

2021

RSD

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A crescente demanda de energia associada ao declínio progressivo das reservas de óleos convencionais (óleo extraleves, leves e médios) têm estimulado a exploração de campos de óleos pesados e extra-pesados. Porém, por conta de diversas características intrínsecas destes óleos, explorá-los, transportá-los e refiná-los ainda são desafios a serem vencidos. Dessa forma, o presente trabalho teve como objetivo apresentar uma revisão bibliométrica sobre os principais agentes emulsificantes que vêm sendo empregados na estabilização de emulsões de óleo pesado em água (O/A), com fins de melhorar o escoamento desses óleos nas condições de superfície (fluxo em tubulações). A busca foi realizada utilizando as plataformas Science Direct, One Petro e Web of Science, inserindo as seguintes palavras-chaves: Heavy crude oil; Oil-in-water emulsion; Stability; Pipeline transportation. A abrangência temporal foi limitada em 10 anos (2011-2020) e, na sequência, os critérios de inclusão/exclusão foram aplicados, de modo a refinar a busca. Como resultado foi obtido um total de 18 artigos científicos. Dentre os países que apresentaram maior interesse no tema, podemos destacar a Índia, a Noruega, o México, a China, os Estados Unidos e o Irã. Em relação aos emulsificantes mais empregados na estabilização de emulsões O/A os surfactantes e as partículas sólidas foram os mais citados. Embora os surfactantes não iônicos tenham sido apontados como os mais eficientes, ainda são necessários estudos mais detalhados para entender o mecanismo de atuação destes agentes, bem como avaliar a capacidade destes compostos de estabilizar emulsões O/A em condições de escoamento em superfície.

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“…Although conventional surfactants can emulsify the heavy oil to form stable oil-in-water emulsion together with a polymeric stabilizer, such system is not applicable under the reservoir conditions. [19][20][21] It is highly desirable to develop a novel polymeric surfactant not only to emulsify heavy oil, but also to increase the viscosity of the fluid at the reservoir conditions. Polymeric surfactants are usually amphiphilic polymers.…”

Section: Introductionmentioning

confidence: 99%

Synthesis and laboratory evaluation of iso‐tridecyloxypolyethylene glycol acrylate copolymers as potential viscosity reducers for heavy oil

Fu-sheng

Lei

Liu

et al. 2020

Energy Science & Engineering

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As driven by the increase in global fuel demand and decrease in worldwide reserves of conventional oil, it is important to develop new production technologies for heavy oil. In this work, copolymers PAAI7, PAAI10, and PAAI15 were synthesized and evaluated as potential viscosity reducers for heavy oil. iso‐Tridecyloxypolyethylene glycol acrylates (I13CxAA, x = 7, 10, 15), acrylic amide (AM), and 2‐acrylamido‐2‐methylpropane sulfonic acid (AMPS) were polymerized to give the copolymers PAAIx, respectively. Copolymers PAAIx were characterized by FTIR, 1H NMR spectroscopy, and TGA and showed good thermal stabilities as the decomposition temperature was above 350°C. Their viscosity‐average molecular weights were measured as in the range between 6.53 × 106 and 10.58 × 106 g/mol. The effects of temperature, shear rate, and salinity on the viscosity of polymer solutions were studied, and PAAIx had reasonable rheological properties. The solutions of PAAIx in formation water could emulsify heavy oil sample to form oil‐in‐water emulsion when mass ratio of oil:water was in the range of 6:4‐2:8, respectively. The rates of reduction in viscosity of emulsions compared with that of original oil sample were 53.5%‐97.5% at 50°C under shear rate of 20 s−1. The effects of oil:water ratio, emulsifying temperature, and shear rate on the viscosities of emulsions were extensively studied, and the effect of the polymer structure on the emulsification and viscosity reduction of heavy oil was also discussed. Among three copolymers, PAAI15 formed the most stable emulsion with heavy oil and the emulsion had the lowest viscosity. PAAI15 had the potential for further study.

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Formation of concentrated emulsions in heavy oil

Cited by 20 publications

References 13 publications

Modifying the Viscosity of Heavy Crude Oil Using Surfactants and Polymer Additives

Modifying the Viscosity of Heavy Crude Oil Using Surfactants and Polymer Additives

Agentes emulsificantes aplicados à estabilização de emulsões o/a com intuito de melhorar o transporte de óleos pesados através das tubulações: Um estudo bibliométrico

Synthesis and laboratory evaluation of iso‐tridecyloxypolyethylene glycol acrylate copolymers as potential viscosity reducers for heavy oil

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