Effects of Mixing Conditions, Oil Type and Aqueous Phase Composition on Some Crude Oil Emulsions

Omole, O.; Falode, Olugbenga

doi:10.3923/jas.2005.873.877

Cited by 5 publications

(3 citation statements)

References 3 publications

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“…The contact between water and oil with adequate mixing in the presence of emulsifier or emulsifying agent generate crude oil emulsions. The presence of emulsifiers and mixing quantity are important during the oil emulsion formation [1,45,53]. The production of crude oil requires diverse sources of mixing (called amount of shear), these include bottom-hole perforation/pump; flow across reservoir rock; production headers; flow lines and flow through tubing; chokes, fittings and valves; generated gas bubbles due to phase changes; and surface equipment [23].…”

Section: Formation Of Oil Emulsionmentioning

confidence: 99%

Trending approaches on demulsification of crude oil in the petroleum industry

2021

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The complicated nature of crude oil emulsions is part of the major setbacks associated with the postulation of methods for phase separation and demulsification in the oil industry. Despite the increasing efforts in generating efficient and dependable demulsification methods, the majority of emulsions cannot be shattered in reduced times. This review examines the trending techniques of crude oil demulsification in the petroleum industry. Several approaches have been examined to discover the best method of demulsification. Hence, this reports reviewed the past studies on the emulsion, formation of oil emulsions, methods of demulsification, characteristics of demulsifier, mechanism of demulsification, kinetics in demulsification, operating parameters influencing the demulsification processes, the structure of demulsifier, and formulations that are involved in the demulsification. The formulations of crude oil demulsification have been investigated to unveil adequate demulsifiers for crude oil. Therefore, demulsification approaches have several applications due to wider varieties of crude oil, separation equipment, brines, chemical demulsifiers, the method in which demulsifiers is been formulated, and product specifications.

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Section: Formation Of Oil Emulsionmentioning

confidence: 99%

Trending approaches on demulsification of crude oil in the petroleum industry

2021

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“…Optimum pH for water separation changes from approximately 10 for distilled water to between 6 and 7 for the bicarbonate brine solution studied by Strassner . In the case of acidizing in a low pH environment, asphaltenes may play a leading role in stabilizing emulsions because the rigid interfacial films formed by asphaltenes are strongest in acidic pH environments. , …”

Section: Introductionmentioning

confidence: 99%

“…28 In the case of acidizing in a low pH environment, asphaltenes may play a leading role in stabilizing emulsions because the rigid interfacial films formed by asphaltenes are strongest in acidic pH environments. 28,29 In addition to emulsion problems, while asphaltenes can associate with each other in favorable conditions, in unfavorable conditions, they can form larger clusters and precipitate out of the oil, forming a sludge. 30−32 Once formed in the reservoir, the precipitated sludge can plug formation pores, coat the formation, making it oil-wet, and stabilize emulsions.…”

Section: ■ Introductionmentioning

confidence: 99%

Characterizing Time-Dependent Stability and Viscosity of Acid–Crude Emulsions for Matrix-Acidizing Applications

et al. 2019

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The process of matrix acidizing, while aiming at enhancing near-wellbore flow conditions, can result in damaging effects when acid–oil emulsions form. Understanding the behavior of these emulsions, especially when it comes to its stability and viscosity, is an essential step in the design of acid jobs that can lead to successful well productivity enhancement. In this study, we investigate the time-dependent nature of these emulsions using bottle tests and coreflooding experiments. The results of the work provide new insights into the formation of in situ emulsion. This has direct impact on the design of acid jobs in well stimulation treatments.

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Role of Acid Components and Asphaltenes in Wyoming Water-in-Crude Oil Emulsions

2011

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Two classes of stabilizing oil components in water-in-crude oil emulsions for three oils from the state of Wyoming are investigated in this paper. The associated contributions appear to be different for each crude oil. Given the molecular complexity of crude oils and their properties, more than one oil component is thought to contribute to emulsion stability and we speculate that stability is the outcome of competing materials adsorption on waterÀoil interfaces, in addition to interfacial and bulk rheology. The presence of emulsion-stabilizing acids and their complexes, presumed here to be naphthenic acids for at least one of the crude oils used here, is claimed to stabilize water-in-crude oil emulsions. The presence of acids is inferred from pH changes of the resolved water fraction obtained in centrifuge-bottle tests, as well as in partition tests. The oil wash test, in which oil obtained after emulsification is reused to generate new water-in-crude oil emulsions, is used here to elucidate the role of the water-insoluble fraction. The effect of di-and monovalent cations in solution on emulsion stability is compared for two oils. Results show that stability improves when the aqueous phase contains calcium ions only in contrast with solutions containing sodium ions exclusively at the same ionic strength.

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Effects of Mixing Conditions, Oil Type and Aqueous Phase Composition on Some Crude Oil Emulsions

Cited by 5 publications

References 3 publications

Trending approaches on demulsification of crude oil in the petroleum industry

Trending approaches on demulsification of crude oil in the petroleum industry

Characterizing Time-Dependent Stability and Viscosity of Acid–Crude Emulsions for Matrix-Acidizing Applications

Role of Acid Components and Asphaltenes in Wyoming Water-in-Crude Oil Emulsions

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