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Eftekhari, A.A. (author), Farajzadeh, R. (author)We investigate the validity of the assumption that foam in porous media reduces the mobility of gas phase only and does not impact the liquid-phase mobility. The foam is generated by simultaneous injection of nitrogen gas and a surfactant solution into sandstone cores and its strength is varied by changing surfactant type and concentration. We...journal article 2017
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- van der Meer, J.M. (author), Farajzadeh, R. (author), Jansen, J.D. (author) conference paper 2017
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Farajzadeh, R. (author), Bedrikovetsky, P. (author), Lotfollahi, M. (author), Lake, L. W. (author)Physical adsorption and mechanical entrapment are two major causes of polymer retention in porous media. Physical adsorption is considered an equilibrium process and is often modeled by assuming a Langmuir isotherm. The outcome is a steady state pressure response because the permeability reduction is also accounted for by adsorption. However,...journal article 2016
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Kapetas, L. (author), Vincent-Bonnieu, S.Y.F. (author), Danelis, S (author), Rossen, W.R. (author), Farajzadeh, R. (author), Eftekhari, A.A. (author), Mohd Shafian, SR (author), Kamarul Bahrim, RZ (author)Foam can increase sweep efficiency within a porous medium, which is useful for oil-recovery processes[1]. The flow of foam in porous media is a complex process that depends on properties like permeability, porosity and surface chemistry, but also temperature. Although the surface activity of surfactants as a function of temperature is well...journal article 2016
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Jones, S.A. (author), van der Bent, V (author), Farajzadeh, R. (author), Rossen, W.R. (author), Vincent-Bonnieu, S.Y.F. (author)tAqueous foams play an important role in many industrial processes, from ore separation by froth flotationto enhanced oil recovery (EOR). In the latter case, the foam is used as a means of increasing the sweepefficiency through the oil bearing rock – the complex, structure dependent, flow behavior of the foammeans that it has improved...journal article 2016
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Jones, S.A. (author), Laskaris, G. (author), Vincent-Bonnieu, S.Y.F. (author), Farajzadeh, R. (author), Rossen, W.R. (author)We present a comparative study of foam coreflood experiments with various surfactant concentrations. Plots of apparent viscosity vs. injected gas fraction were obtained for surfactant concentrations at the critical micelle concentration and above. Bulk foam stability was measured for all concentrations and compared with the coreflood results....journal article 2016
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Lotfollahi, M (author), Farajzadeh, R. (author), Delshad, M (author), Varavei, A (author), Rossen, W.R. (author)Simulation models for foam enhanced oil recovery are of two types: those that treat foam texture or bubble size explicitly (population-balance models) and those that treat the effects of foam texture implicitly through a gas mobility-reduction factor. The implicit-texture models all implicitly assume local equilibrium (LE) between the processes...journal article 2016
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Effect of matrix wettability CO2 assisted gas-oil garvity drainage in naturally fractured reservoirsAmerighasrodashti, A. (author), Farajzadeh, R. (author), Shojai Kaveh, N. (author), Suicmez, S. (author), Wolf, K.H.A.A. (author), Bruining, J. (author)The wettability behavior of the matrix block is one of the major factors controlling the effectiveness of the employed EOR methods in NFRs. Water injection in NFRs with mixed-wet or effectively oil-wet matrix blocks usually results in low oil recoveries. In this case, gas injection is considered to be an alternative process, where the process...conference paper 2015
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Effect of Permeability on Implicit-Texture Foam Model Parameters and the Limiting Capillary PressureFarajzadeh, R. (author), Lotfollahi, M. (author), Eftekhari, A.A. (author), Rossen, W.R. (author), Hirasaki, G.J.H. (author)Accurate modeling of foam rheology on the field scale requires detailed understanding of the correlation between the fundamental properties of foam and the scalable parameters of the porous medium. It has been experimentally observed that foam experiences an abrupt coalescence when the capillary pressure in the porous medium approaches a certain...journal article 2015
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Khoshnevis Gargar, N. (author), Mahani, H. (author), Rehling, J.G. (author), Vincent-Bonnieu, S. (author), Farajzadeh, R. (author)Gas injection projects often suffer from poor volumetric sweep because under reservoir conditions the density and viscosity differences between the gas and the in-situ oil leads to override and bypassing of much of the oil in place. Foam has been suggested as a potential solution to this shortcoming and has shown success in some of the field...conference paper 2015
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Roebroeks, J. (author), Eftekhari, A.A. (author), Farajzadeh, R. (author), Vincent-Bonnieu, S. (author)Foam flooding as a mechanism to enhance oil recovery has been intensively studied and is the subject of multiple research groups. However, limited stability of surfactant-generated foam in presence of oil and low chemical stability of surfactants in the high temperature and high salinity of an oil reservoir are among the reasons for foam EOR not...conference paper 2015
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Jones, S.A. (author), Van der Bent, V. (author), Farajzadeh, R. (author), Rossen, W.R. (author), Vincent-Bonnieu, S. (author)Aqueous foams are a means of increasing the sweep efficiency of enhanced oil recovery processes. An understanding of how a foam behaves in the presence of oil is therefore of great importance when selecting suitable surfactants for EOR processes. The consensus is currently that the most reliable method for determining the foam behavior in the...conference paper 2015
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Farajzadeh, R. (author), Lotfollahi, M. (author), Eftekhari, A.A. (author), Rossen, W.R. (author), Hirasaki, G.J. (author)Accurate modelling of foam rheology on the field scale requires detailed understanding of the correlation between the fundamental properties of foam and the scalable parameters of the porous medium. It has been experimentally observed that foam experiences an abrupt coalescence when the capillary pressure in the porous medium approaches a...conference paper 2015
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Khosrokhavar, R. (author), Eftekhari, A.A. (author), Farajzadeh, R. (author), Wolf, K.H.A.A. (author), Bruining, J. (author)The growing concern about global warming has increased interest in improving the technology for the geological storage of CO2 in aquifers. One important aspect for aquifer storage is the rate of transfer between the overlying gas layer and the aquifer below. It is generally accepted that density driven natural convection is an important...conference paper 2015
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Borazjani, S. (author), Bedrikovetsky, P. (author), Farajzadeh, R. (author)Analytical solutions for one-dimensional two-phase multicomponent flows in porous media describe processes of enhanced oil recovery, environmental flows of waste disposal, and contaminant propagation in subterranean reservoirs and water management in aquifers. We derive the exact solution for 3x3 hyperbolic system of conservation laws that...journal article 2014
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- Chahardowli, M. (author), Farajzadeh, R. (author), Bruining, J. (author) conference paper 2013
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- Chahardowli, M. (author), Farajzadeh, R. (author), Bruining, J. (author) conference paper 2013
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Meulenbroek, B.J. (author), Farajzadeh, R. (author), Bruining, J. (author)Carbon dioxide injected in an aquifer rises quickly to the top of the reservoir and forms a gas cap from where it diffuses into the underlying water layer. Transfer of the CO2 to the aqueous phase below is enhanced due to the high density of the carbon dioxide containing aqueous phase. This paper investigates the behavior of the diffusive...journal article 2013
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Amerighasrodashti, A. (author), Farajzadeh, R. (author), Verlaan, M. (author), Suicmez, V.S. (author), Bruining, J. (author)Miscible solvent injection has received increasing attention in recent years as an efficient method to improve oil recovery from fractured reservoirs. Due to the large permeability difference between fracture and matrix, the success of this method depends to large extent on the degree of enhancement of the mass exchange rate between the solvent...conference paper 2013
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Farajzadeh, R. (author), Meulenbroek, B.J. (author), Daniel, D. (author), Riaz, A. (author), Bruining, J. (author)In this paper, we follow a similar procedure as proposed by Koval (SPE J 3(2):145–154, 1963) to analytically model CO2 transfer between the overriding carbon dioxide layer and the brine layer below it. We show that a very thin diffusive layer on top separates the interface from a gravitationally unstable convective flow layer below it. Flow in...journal article 2013