Emulsions for enhanced oil recovery: Progress and prospect

Li, Kexing; Ovsepian, Mkhitar; Xie, Wan; Varfolomeev, Mikhail A.; Luo, Qiang; Yuan, Chengdong

doi:10.1016/j.molliq.2023.123658

Cited by 10 publications

(4 citation statements)

References 160 publications

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“…The color becomes distorted towards yellow when it is highly concentrated. Emulsions do not form spontaneously due to their usual unstable attribute [3]. Energy applied via stirring, shaking, spraying and homogenizing is required to form an emulsion.…”

Section: Introductionmentioning

confidence: 99%

Determination of Liquid Paraffin Emulsions’ Stability Parameters Using Spans as Emulgent

Bunmi

2024

Curr. J. Appl. Sci. Technol.

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Aims: To prepare liquid paraffin emulsions using spans of different grades as emulgent in extensively different concentrations and then determine the formulations’ stability parameters. Study Design: The study consulted some literatures to have the basic knowledge before laboratory experiments were conducted. Place and Duration of Study: This study was conducted in Obafemi Awolowo University Ile Ife, Nigeria laboratory between 2023 and 2024. Methodology: The characteristic properties of different formulations of liquid paraffin emulsions prepared using spans of different grades as emulgent has been studied. The influence of emulgent of various concentrations (2.5- 30%) on the properties of w/o emulsions containing 30% aqueous phase was examined using dilution, dye-solubility, cobalt chloride tests and Rion viscotester VT-04 to determine melting point and softening determination, creaming profile, viscometric and emulsion type. Results: The result revealed Span 20 and Span 80 to be light yellowish in colour and hydrophobic in nature while Span 60 was miscible with water when heated to 75 oC. Liquid paraffin emulsions formulated via Spans 20, 80 and 85 were all noticed to be physically stable liquid emulsion products at room temperature. The values of the softening and melting point of the Span 85 based creams were lower (32-33 and 35-36 oC) than those of Span 80 based products (35-36 and 41-43 oC) respectively. The yield values of Spans 20 and Span 80 solid emulsions were observed to be relatively high in the range 3500-4000 P when compared with those of Span 85 based creams having 500-1050 P. Two layers of different densities of the dispersed phase were observed by the emulsion phase. Rapid dispersion of the Spans 20, 80 and 85 stabilized samples 1, 2 and 3 emulsion drops that were placed into distilled water was observed. The other Span based formulations which contain higher concentrations (15-30%) of the emulgent (samples 4, 5, 6 and 7) were also observed to be miscible with water. Conclusion: In conclusion, the emulgent at various concentrations has positive influence on liquid paraffin emulsions at some friendly conditions.

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Section: Introductionmentioning

confidence: 99%

Determination of Liquid Paraffin Emulsions’ Stability Parameters Using Spans as Emulgent

Bunmi

2024

Curr. J. Appl. Sci. Technol.

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“…Surfactant polymer (SP) flooding, a kind of enhanced oil recovery technology, has shown great potential in oil recovery . SP flooding can achieve ultralow interfacial tension and increase oil displacement efficiency, which could enhance oil displacement efficiency by 20% and decrease the injection pressure in low permeability reservoirs. , It has been widely used in many oilfields, such as Daqing, Xinjiang, Henan, and Bohai in China. − Usually, the most used polymer in SP flooding is partially hydrolyzed polyacrylamide (HPAM), and the most used surfactants include anionic surfactants, nonionic surfactants, and zwitterionic surfactants. , …”

Section: Introductionmentioning

confidence: 99%

“…4−6 Usually, the most used polymer in SP flooding is partially hydrolyzed polyacrylamide (HPAM), and the most used surfactants include anionic surfactants, nonionic surfactants, and zwitterionic surfactants. 7,8 Produced fluid treatment is an important task that must be considered in SP flooding applications. Especially for offshore platforms, the limited space leads to a short produced fluid treatment time, so the impacts of polymers and surfactants on the produced fluid treatment difficulty are particularly important.…”

Section: Introductionmentioning

confidence: 99%

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Effect of the Surfactant Type on the Demulsification of the W/O Crude Oil Emulsion Produced by Surfactant–Polymer Flooding

Zhang,

Wang,

Liang

et al. 2024

ACS Omega

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At present, there are many works on the influences of partially hydrolyzed polyacrylamide (HPAM) and surfactant on the stability and treatment of O/W emulsion produced by surfactant−polymer (SP) flooding. However, there are few related reports on the effects of HPAM and surfactant on the demulsification of W/O crude oil emulsion produced by SP flooding. Especially, there is no report on the effect of the surfactant type. In this paper, sodium dodecyl sulfate (SDS), octylphenol polyoxyethylene ether (OP-10), and alkyl C16−18 hydroxypropyl sulfobetaine (HSB1618) were selected as representatives of the anionic surfactant, nonionic surfactant, and zwitterionic surfactant, respectively. Demulsification experiments and interface behavior experiments were conducted to investigate their influences on the demulsification performance of a demulsifier D1. The results showed that the order of the negative effect of the surfactant type on dehydration speed and the dehydration rate of D1 was HPAM + OP-10 > HPAM + HSB1618 > HPAM + SDS. There is no difference in the effect of three surfactants on the conformation adjustment of D1 at the W/O interface, but the properties of the composite W/O interface formed by them and D1 were different. The coalescence time was longest when there were HPAM and OP-10 in water, while the lg(G 1 ′/ G demulsifier ′)/lgG 1 ′ was the smallest, which led to the most difficult demulsification of W/O emulsion. This work can guide surfactant selection during SP flooding from the perspective of produced fluid treatment.

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Study on oil-in-water emulsions stabilized by SiO2 nanoparticles for enhancing oil recovery in harsh reservoirs

Yang,

Ge,

et al. 2024

Colloid Polym Sci

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Emulsions for enhanced oil recovery: Progress and prospect

Cited by 10 publications

References 160 publications

Determination of Liquid Paraffin Emulsions’ Stability Parameters Using Spans as Emulgent

Determination of Liquid Paraffin Emulsions’ Stability Parameters Using Spans as Emulgent

Effect of the Surfactant Type on the Demulsification of the W/O Crude Oil Emulsion Produced by Surfactant–Polymer Flooding

Study on oil-in-water emulsions stabilized by SiO2 nanoparticles for enhancing oil recovery in harsh reservoirs

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