Recent demulsification methods of crude oil emulsions – Brief review

Faizullayev, Saidulla; Adilbekova, Akbota; Kujawski, Wojciech; Mirzaeian, Mojtaba

doi:10.1016/j.petrol.2022.110643

Cited by 38 publications

(23 citation statements)

References 109 publications

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“…35 For multiphase separation, in an area where the interface can be hazardous, the interface structural characteristics can be regulated for oil−water and gas−liquid separation. 15 The physical and chemical interface methods are discussed in Section 6. Overall, the application and regulation of an interface influence the flow characteristics and phase interactions, which can be used to efficiently optimize the production and operation in the petroleum industry.…”

Section: Application and Regulation Of Interface Behavior And Phenomenamentioning

confidence: 99%

“…14 However, while this is beneficial for the recovery of crude oil, the produced liquid poses a huge challenge in terms of oil−gas−water phase separation during subsequent gathering and processing. 15 Additionally, the interface structure and behavior affect the flow characteristics of the multiphase flow, and chemical components such as polymers are added in the rock formation to increase the viscosity of the displacing fluid and enhance sweep efficiency. 16 When the produced liquid enters the gathering and processing system, the flow patterns in multiphase flow transmission are difficult to predict because of the formation of unknown flow characteristics due to the complex and diverse interface structure; an increase in viscosity sharply increases the pipeline transmission energy consumption, which is directly related to the total energy consumption of oil gathering and processing.…”

Section: Introductionmentioning

confidence: 99%

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Effect of Interface Structure and Behavior on the Fluid Flow Characteristics and Phase Interaction in the Petroleum Industry: State of the Art Review and Outlook

Hong

Wang

et al. 2023

Energy Fuels

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As the global oil market continues to tighten, there is an increasing focus on enhancing oil recovery. However, enhanced oil recovery technologies require the addition of chemical components such as surfactants, alkalis, and polymers to the oil reservoir. These chemical components change the interface structure and affect fluid flow characteristics and phase interactions through adsorption and other behaviors, thus affecting the production efficiency and energy consumption of oil recovery, gathering, processing, and transportation. Particularly, a stable interface is formed during oil recovery that can sharply increase the difficulty of phase separation during oil gathering and processing, thereby considerably decreasing the separation efficiency. Therefore, it is crucial to understand the effect of the interface structure and behavior on fluid flow characteristics and phase interactions for the advancement of the petroleum industry. Herein, the application and regulation of interfaces in the petroleum industry for fluid flow characteristics and phase interactions are reviewed, approaches for characterizing interface characteristics are critically analyzed and discussed, mechanisms of various factors influencing interface formation and stability through phase interactions are investigated, and methods of interface inhibition and destruction are summarized. Moreover, the latest techniques for applied interface formation in the petroleum industry are discussed, and the challenges and research prospects related to interfaces are summarized, providing references for enriching theoretical research in the field of interfaces within the petroleum industry and efficiently optimizing the production and operation of the petroleum industry.

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Section: Application and Regulation Of Interface Behavior And Phenomenamentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Effect of Interface Structure and Behavior on the Fluid Flow Characteristics and Phase Interaction in the Petroleum Industry: State of the Art Review and Outlook

Hong

Wang

et al. 2023

Energy Fuels

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“…The chemical method refers to separating oil and water by adding a demulsifier to the emulsion [ 18 ]. The chemical demulsification method has been well recognized as one of the effective methods for oil-water separation in a highly stable emulsion [ 19 , 20 , 21 ]. However, a single physical or chemical method is not able to meet the requirements of the large-scale treatment fluid.…”

Section: Introductionmentioning

confidence: 99%

Probing the Demulsification Mechanism of Emulsion with SPAN Series Based on the Effect of Solid Phase Particles

et al. 2023

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The solid particles in the produced fluids from the oil wells treated by compound flooding can greatly stabilize the strength of the interfacial film and enhance the stability of the emulsion, increasing the difficulty of processing these produced fluids on the ground. In this paper, the oil phase and the water phase were separated from the SPAN series emulsions by electrical dehydration technology and adding demulsifier agents. The changing trends of the current at both ends of the electrodes were recorded during the process. The efficient demulsification of the emulsion containing solid particles was studied from the perspective of oil-water separation mechanisms. Combined with the method of molecular dynamics simulation, the effect of the addition of a demulsifier on the free movement characteristics of crude oil molecules at the position of the liquid film of the emulsion were further analyzed. The results indicated that the presence of solid particles greatly increased the emulsifying ability of the emulsion and reduced its size. Under the synergistic effect of demulsifier and electric dehydration, the demulsification effect of the emulsion increased significantly, and the demulsification rate could reach more than 82%. The addition of demulsifiers changed the stable surface state of the solid particles. The free movement ability of the surrounding crude oil molecules was enhanced, which led to a decrease in the strength of the emulsion film so that the water droplets in the emulsions were more likely to coalesce and break. These results are of great significance for the efficient treatment of wastewater from oilfields, promoting the sustainability of environment-friendly oilfield development.

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“…Water-in-oil (W/O) emulsions are ubiquitous in oil exploitation and processing. − Water in oil causes serious harm, such as a reduction in the viscosity of lubricating oil, resulting in lubrication shortage; moreover, it causes equipment metal parts to rust, seriously shortening the service life of the equipment. − Therefore, it is necessary to remove the water present in the oil. However, water-in-oil emulsion usually has strong interface stability characteristics, causing dehydration problems. , Commonly used oil dehydration methods include gravity sedimentation, chemical demulsification, vacuum dehydration, centrifugal separation, and electric field dehydration. ,− However, these methods have many disadvantages, such as high energy consumption (electric field and vacuum dehydration), secondary pollution (chemical demulsification), and low efficiency (centrifugal separation and gravity sedimentation). − In recent years, media coalescence technology has attracted wide attention from domestic and foreign scholars owing to its advantages of high efficiency, being environmentally friendly, and low energy consumption …”

Section: Introductionmentioning

confidence: 99%

“… 2 , 11 − 14 However, these methods have many disadvantages, such as high energy consumption (electric field and vacuum dehydration), secondary pollution (chemical demulsification), and low efficiency (centrifugal separation and gravity sedimentation). 15 − 17 In recent years, media coalescence technology has attracted wide attention from domestic and foreign scholars owing to its advantages of high efficiency, being environmentally friendly, and low energy consumption. 18 …”

Section: Introductionmentioning

confidence: 99%

Investigation of the Microscopic Process of the Media Coalescence Treatment of Water-in-Oil Emulsion

Meng

Yang

2023

ACS Omega

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Medium coalescence technology is a research hotspot for the separation of oil-in-water emulsions. However, the coalescence mechanism is still unclear, making it challenging to effectively improve the separation performance. Herein, the microscopic mechanism of medium coalescence was revealed. We found that the effective collision positions under the action of the flow field include the exposed granule surface, adherent droplet surface, and three-phase contact line. Furthermore, a numerical model of the microscopic process of water-in-oil emulsion permeation through a granular bed was established. The effects of different parameters (including the number of medium layers, Reynolds number, and inlet concentration) on the microscopic process of capturing dispersed-phase droplets in the bed and the pressure drop in the coalescence area were studied. The numerical results show that the droplets form the bridging structure between the granules. On the one hand, the bridging structure promotes the capture of the droplets by the bed; on the other hand, it causes pressure-drop fluctuations in the coalescence area and asymmetric distribution of the velocity field.

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Recent demulsification methods of crude oil emulsions – Brief review

Cited by 38 publications

References 109 publications

Effect of Interface Structure and Behavior on the Fluid Flow Characteristics and Phase Interaction in the Petroleum Industry: State of the Art Review and Outlook

Effect of Interface Structure and Behavior on the Fluid Flow Characteristics and Phase Interaction in the Petroleum Industry: State of the Art Review and Outlook

Probing the Demulsification Mechanism of Emulsion with SPAN Series Based on the Effect of Solid Phase Particles

Investigation of the Microscopic Process of the Media Coalescence Treatment of Water-in-Oil Emulsion

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