Micro-particle Image Velocimetry Measurements of Pore-Scale Velocity Field during Nanoparticle-Assisted Alkaline Flooding

Sharma, Vikas Kumar; Tiwari, Pankaj; Singh, Anugrah

doi:10.1021/acs.energyfuels.1c00592

Cited by 10 publications

(8 citation statements)

References 60 publications

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“…However, the foam has the disadvantage of de-foaming in contact with oil, so the EOR is poor. , A polymer is used to increase the viscosity of the injected fluid and reduce the mobility ratio of injected fluid to crude oil to increase the swept area . But a long polymer chain would be severely fractured under the shearing action of formation, resulting in a good profile modification being achieved only in the near-wellbore zone. − Alkali can form surfactants with the acidic components of crude oil, so it can emulsify the crude oil in situ to form an O/W emulsion and be produced with subsequent fluid injection . However, the absorption of alkali is serious and only the oil near a wellbore can be used .…”

Section: Introductionmentioning

confidence: 99%

“…20−22 Alkali can form surfactants with the acidic components of crude oil, so it can emulsify the crude oil in situ to form an O/W emulsion and be produced with subsequent fluid injection. 23 However, the absorption of alkali is serious and only the oil near a wellbore can be used. 24 Adding a small amount of emulsification flooding agent to water can provide a better EOR effect by using the adsorption characteristics of surfactants on an oil−water interface to emulsify the oil into the O/W emulsion.…”

Section: Introductionmentioning

confidence: 99%

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Influence of Emulsification Characteristics on the Pressure Dynamics during Chemical Flooding for Oil Recovery

Liu

Zhang³

et al. 2023

Energy Fuels

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Chemical flooding agents, especially surfactant-based flooding oil agents, have been widely studied due to their excellent emulsification ability. Nevertheless, there are many evaluation methods for chemical flooding agents, and the focus of each test is different. How to combine routine testing with reservoir conditions is an urgent problem to be solved. In this study, different kinds of chemical flooding agents were evaluated for interfacial tension (IFT), minimum emulsification speed, emulsification state, droplet size distribution, viscoelasticity, apparent viscosity in porous media, stability, and flooding efficiency. The influence of their characteristics on the pressure dynamics during flooding is analyzed, and the mechanism in the different stages of chemical flooding is clarified. A comprehensive analysis of IFT and the minimum emulsification speed is needed to evaluate the emulsification ability. The apparent viscosity when W/O emulsion flows through porous media is more accurate to evaluate the viscosity reduction of the chemical flooding agents than the traditional viscosity test. The chemical flooding dynamics is mainly divided into three stages: pressure increase (emulsification ability), pressure decrease (fluidity of formed oil in water (O/W) emulsion), and pressure stabilization (flooding efficiency). The stronger the emulsification ability, the faster the pressure increase and the wider the main flow channel. The easier the O/W emulsion is formed, the smaller the droplet size, the stronger the elastic deformation ability, and the higher the oil flooding efficiency. The smaller the droplet size and the stronger the viscoelasticity of O/W emulsion, the lower the maximum pressure in the flooding process and the slower the pressure decrease in the middle stage. Therefore, the evaluation of chemical flooding agents should mainly consider their emulsification ability and the formed O/W emulsion droplet size, viscoelasticity, and stability. This study clarified the evaluation focus of chemical flooding, and laid a foundation for the research and development and screening of chemical flooding agents, and the dynamic analysis of chemical flooding.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Influence of Emulsification Characteristics on the Pressure Dynamics during Chemical Flooding for Oil Recovery

Liu

Zhang³

et al. 2023

Energy Fuels

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“…Maaref et al 27 found that at a higher viscosity ratio, the oil recovery is significantly high due to the viscous force enforced by the displacing phase. A few experimental studies by Heshmati et al 29 and Sharma et al 2 show that an increment in the displacing phase viscosity and flow rate applies a viscous force on the residual nonwetting phase. The viscous force results in a momentum transfer to the trapped phase, resulting in its being mobilized.…”

Section: Introductionmentioning

confidence: 99%

Numerical Simulation of Pore-Scale Fluid Mobilization during Immiscible Displacement

Sharma,

Singh,

Tiwari

et al. 2023

Energy Fuels

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A significant amount of oil remains trapped in the deal-ends of a porous network during a water flooding process in an oil reservoir. A deep insight into the immiscible displacement mechanism, effect of rock and fluid properties, and dead-end geometry on the trapped oil recovery from the complex pores is required. We present numerical simulations of immiscible two-phase flow at the pore scale to understand the displacement mechanism in the complex pores (dead-ends and contraction−expansion) and parameters affecting the oil recovery. The effects of displacing phase injection velocity, viscosity ratio, wettability alteration, viscosity of trapped oil, and geometric ratio on the trapped oil recovery have been investigated. The results show that decreasing the contact angle has a marginal effect on the recovery of the trapped fluid until a critical contact angle is reached. It is observed that at smaller contact angles (water-wet condition) water displaces the oil along the dead-end walls. The simulations show that when the oil/water interface reaches the bottom of the dead-end before it reaches the rupture point at the pore throat junction, there is complete displacement. Increasing the displacing phase injection velocity significantly increases the oil recovery from dead-end pores. On the other hand, decreasing the injection velocity results in improved oil recovery from the contraction-expansion pores. The increase in the viscosity ratio (displacing phase to the displaced phase) has little impact on the oil recovery from both types of complex pores. Furthermore, it has been observed that with an increase in the dead-end depth oil recovery decreases, and the critical contact angle required for complete displacement is much lower. This study can be useful to develop the right strategies to recover trapped oil from the complex pores.

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“…Heat and mass transfer processes in several applications such as electronics cooling, process intensification, microreactors in the manufacturing of pharmaceutical and fine chemicals, and enhanced oil recovery , involve complex gas–liquid flows in small diameter channels. In recent decades, the miniaturization of equipment has shown great applicability in terms of yield, design, handling, and safety.…”

Section: Introductionmentioning

confidence: 99%

Effect of Bend on Film Thickness in Slug, Slug-Annular, and Annular Flow Regimes in Gas–Liquid Flow in a Microchannel

Mishra

Mohanty

Gupta

et al. 2022

Ind. Eng. Chem. Res.

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In this work, gas−liquid two-phase flow in a microchannel with multiple U-bends is studied over a range of gas and liquid flow rates using a high-speed camera for four Newtonian liquids of different viscosities. The flow regime is observed to transition from slug to annular flow regime for the conditions studied. The liquid film formed between the wall and gas core/bubble is observed to be asymmetric in the curved section of the channel due to the centrifugal force. In the slug flow regime, the film thickness on the inner wall of the bend is observed to be thinner than that on the outer wall. On the contrary, the inner film is observed to be thicker than the outer film in the annular flow regime. This transition is possibly caused by the change in the relative importance of gas and liquid centrifugal forces with change in the flow regime. The understanding of the film behavior at the bends will be useful for the efficient design of chemical microprocessing equipment such as compact heat exchangers and microreactors.

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Micro-particle Image Velocimetry Measurements of Pore-Scale Velocity Field during Nanoparticle-Assisted Alkaline Flooding

Cited by 10 publications

References 60 publications

Influence of Emulsification Characteristics on the Pressure Dynamics during Chemical Flooding for Oil Recovery

Influence of Emulsification Characteristics on the Pressure Dynamics during Chemical Flooding for Oil Recovery

Numerical Simulation of Pore-Scale Fluid Mobilization during Immiscible Displacement

Effect of Bend on Film Thickness in Slug, Slug-Annular, and Annular Flow Regimes in Gas–Liquid Flow in a Microchannel

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