Foam improved oil recovery: Foam front displacement in the presence of slumping

Mas-Hernández, Elizabeth; Grassia, Paul; Shokri, Nima

doi:10.1016/j.colsurfa.2014.12.023

Cited by 17 publications

(16 citation statements)

References 16 publications

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“…Previous studies in the case of homogeneous permeability [11,13,14] have demonstrated that the system attains a state in which the 'apparent' horizontal velocity is uniform with position. 'Apparent' horizontal velocity is the difference in horizontal displacement per difference in time between two points on the front at the same vertical height at two different times.…”

Section: Modifying Velocity For Concavities and Regridding The Frontmentioning

confidence: 99%

“…The two additional cases, mentioned above i.e. increase in driving pressure and surfactant slumping, use a suitable modification of the same model [13,14]. Therefore, in a similar fashion, we propose some changes to the original pressure-driven growth model that will make it appropriate to describe the case of the heterogeneous reservoir.…”

Section: Introductionmentioning

confidence: 99%

“…We have studied previously the displacement of foam within a homogeneous reservoir [11] (revisiting a model of Shan and Rossen [12]), and also two additional cases, one where the injection pressure is increased part way through the process and one taking into account the effect of surfactant slumping due to gravity [13,14].…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Modelling foam improved oil recovery within a heterogeneous reservoir

Hernández

Grassia

Shokri

2016

Colloids and Surfaces A: Physicochemical and Engineering Aspect

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The displacement of foam within a heterogeneous reservoir during foam improved oil recovery is described with the pressure-driven growth model. The pressure-driven growth model has previously been used to study foam motion for homogeneous cases.Here the foam model is modified in such a way that it includes terms for variable permeability. This model gives the evolution of the foam motion over time and the shape of the foam front, a wet foam zone between liquid-filled and gas-filled zones.The foam front shape for a heterogeneous or stratified reservoir develops concave and convex regions. For shapes such as these, the numerical solution of pressuredriven growth requires special numerical techniques, particularly in the case where concavities arise. We also present some analysis of the level of heterogeneity and how it affects the displacement, the shape of the front developing a set of concave corners. In addition to this we consider a heterogeneous and isotropic reservoir, in which case the foam front can sustain concavities, without these concavities having the same tendency to develop into corners.

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Section: Modifying Velocity For Concavities and Regridding The Frontmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Modelling foam improved oil recovery within a heterogeneous reservoir

Hernández

Grassia

Shokri

2016

Colloids and Surfaces A: Physicochemical and Engineering Aspect

Self Cite

View full text Add to dashboard Cite

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“…This is fortunate because the equations governing pressure-driven growth are well behaved in the case of convex shapes, whereas to handle concave shapes [5], special strategies need to be put in place for solving the equations. Unfortunately there are a number of scenarios (generalisations of the simple homogeneous, isotropic, unit driving pressure case that is discussed above) for which the foam front will no longer be convex, instead concavities will appear [5,8]. Amongst these is the case of a sudden rise in the driving pressure which is what is considered here.…”

Section: Introductionmentioning

confidence: 99%

Foam-improved oil recovery: Modelling the effect of an increase in injection pressure

2015

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Abstract.A model, called pressure-driven growth, is analysed for propagation of a foam front through an oil reservoir during improved oil recovery using foam. Numerical simulations of the model predict, not only the distance over which the foam front propagates, but also the instantaneous front shape. A particular case is studied here in which the pressure used to drive the foam along is suddenly increased at a certain point in time. This transiently produces a concave front shape (seen from the domain ahead of the front): such concavities are known to be delicate to handle numerically. As time proceeds however, the front evolves back towards a convex shape, and this can be predicted by a long-time asymptotic analysis of the model. The increase in driving pressure is shown to be beneficial to the improved oil recovery process, because it gives a more uniform sweep of the oil reservoir by foam.PACS. 82.70.Rr Foams -47.56.+r Porous materials, flow through -89.30.aj Petroleum

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“…Stabilized foams have been used for enhanced oil/gas recovery (EOR) [11][12][13][14], the remediation of non-aqueous phase liquids (NAPLs) [15][16][17], and CO 2 geological storage [18,19]. The stabilized CO 2 -water foam can be used for geological CO 2 sequestration and CO 2 -enhanced oil recovery.…”

Section: Introductionmentioning

confidence: 99%

Hydraulic Properties of Porous Media Saturated with Nanoparticle-Stabilized Air-Water Foam

Zheng

Jang

2016

Sustainability

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Abstract:The foam generated by the mixture of air and water has a much higher viscosity and lower mobility than those of pure water or gas that constitutes the air-water foam. The possibility of using the air-water foam as a flow barrier for the purpose of groundwater and soil remediation is explored in this paper. A nanoparticle-stabilized air-water foam was fabricated by vigorously stirring the nano-fluid in pressurized condition. The foam bubble size distribution was analyzed with a microscope. The viscosities of foams generated with the solutions with several nanoparticle concentrations were measured as a function of time. The breakthrough pressure of foam-saturated microfluidic chips and sand columns were obtained. The hydraulic conductivity of a foam-filled sand column was measured after foam breakthrough. The results show that: (1) bubble coalescence and the Ostwald ripening are believed to be the reason of bubble size distribution change; (2) the viscosity of nanoparticle-stabilized foam and the breakthrough pressures decreased with time once the foam was generated; (3) the hydraulic conductivity of the foam-filled sand column was almost two orders of magnitude lower than that of a water-saturated sand column even after the foam-breakthrough. Based on the results in this study, the nanoparticle-stabilized air-water foam could be injected into contaminated soils to generate vertical barriers for temporary hydraulic conductivity reduction.

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Foam improved oil recovery: Foam front displacement in the presence of slumping

Cited by 17 publications

References 16 publications

Modelling foam improved oil recovery within a heterogeneous reservoir

Modelling foam improved oil recovery within a heterogeneous reservoir

Foam-improved oil recovery: Modelling the effect of an increase in injection pressure

Hydraulic Properties of Porous Media Saturated with Nanoparticle-Stabilized Air-Water Foam

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