Searched for: author%3A%22Rossen%2C+W.R.%22
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Li, K. (author), Wolf, K.H.A.A. (author), Rossen, W.R. (author)
By trapping gas, foam can improve the sweep efficiency in enhanced oil recovery. In this study, to understand gas trapping in fractures, we have conducted experiments in a model fracture with a hydraulic aperture of 80 μm. One wall of the fracture is rough, and the other wall is smooth. The fracture is made of two glass plates and the direct...
conference paper 2021
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Lyu, X. (author), Voskov, D.V. (author), Rossen, W.R. (author)
CO<sub>2</sub>-foam injection is a promising technology for reducing gas mobility and increasing trapping within the swept region in deep brine aquifers. In this work, a consistent thermodynamic model based on a combination of the Peng-Robinson equation of state (PR EOS) for gas components with an activity model for the aqueous phase is...
journal article 2021
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Lyu, X. (author), Voskov, D.V. (author), Tang, J. (author), Rossen, W.R. (author)
Foam injection is a promising enhanced-oil-recovery (EOR) technology that significantly improves the sweep efficiency of gas injection. Simulation of foam/oil displacement in reservoirs is an expensive process for conventional simulation because of the strongly nonlinear physics, such as multiphase flow and transport with oil/foam...
journal article 2021
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Li, K. (author), Wolf, K.H.A.A. (author), Rossen, W.R. (author)
In enhanced oil recovery, foam can effectively mitigate conformance problems and maintain a stable displacement front, by trapping gas and reducing its relative permeability in situ. In this study, to understand gas trapping in fractures and how it affects foam behavior, we report foam experiments in a 1-m-long glass model fracture with a...
journal article 2021
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Li, K. (author), Sharifnik, Mohammadamin (author), Wolf, K.H.A.A. (author), Rossen, W.R. (author)
Foam coarsening by diffusion (Ostwald ripening) has been well studied in bulk foams. However, it is less well understood in porous media. In particular, the mechanisms that may slow or stop coarsening have not been fully investigated. In this paper, we report an experimental study of foam coarsening in two 1-m-long and 15-cm-wide model fractures...
journal article 2021
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Lyu, X. (author), Voskov, D.V. (author), Rossen, W.R. (author)
Foam injection is one efficient way to mitigate gravity segregation during CO2 injection into porous media. The effect of gravity segregation on foam propagation in heterogeneous porous media is not yet fully resolved. To assess CO2 foam transport for enhanced oil recovery (EOR) and for CO2 storage processes in heterogeneous reservoirs, an...
conference paper 2021
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Gong, J. (author), Flores Martinez, Wendy (author), Vincent-Bonnieu, S.Y.F. (author), Kamarul Bahrim, Ridhwan Zhafri (author), Che Mamat, Che A.Nasser Bakri (author), Tewari, Raj Deo (author), Mahamad Amir, Mohammad Iqbal (author), Farajzadeh, R. (author), Rossen, W.R. (author)
Surfactant-alternating-gas (SAG) is a preferred method of foam injection, which is a promising means of enhanced oil recovery. Liquid injectivity in a SAG process is commonly problematic. Our previous studies suggest that the liquid injectivity can be better than expected due to the existence of a collapsed-foam region formed during the gas...
journal article 2020
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Li, K. (author), Wolf, K.H.A.A. (author), Rossen, W.R. (author)
Gas-injection EOR processes have poor sweep efficiency due to conformance problems including channelling, gravity override and fingering. In naturally fractured reservoirs, sweep efficiency is further jeopardized, because gas breaks through fractures first, leaving most oil behind in the matrix. Strong foam can be created in fractures[1][2],...
abstract 2020
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Li, K. (author), Wolf, K.H.A.A. (author), Rossen, W.R. (author)
Gas injection often suffers from the poor sweep efficiency because of conformance problems, including gravity override, viscous fingering and channelling, as gas has a lighter density and a lower viscosity compared to in-situ fluids. Foam, by encapsulating the gas into separate bubbles in surfactant-contained liquid thin films (lamella), can...
abstract 2020
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Li, K. (author), Wolf, K.H.A.A. (author), Rossen, W.R. (author)
In this study, to investigate how gravity affects foam in fractures, we carry out seven sets of foam-scan experiments on three glass model fractures (model A, model B and model C) with a hydraulic aperture of 78, 98 and 128 microns respectively. We compare the behaviour of foam in the models placed horizontally and vertically. We find that...
conference paper 2020
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Gong, J. (author), Flores Martinez, Wendy (author), Vincent-Bonnieu, S.Y.F. (author), Kamarul Bahrim, Ridhwan Zhafri (author), Che Mamat, Che A Nasser Bakri (author), Tewari, Raj Deo (author), Mahamad Amir, Mohammad Iqbal (author), Farajzadeh, R. (author), Rossen, W.R. (author)
Surfactant-alternating-gas (SAG) is a favored method of foam injection, which has been proved as an efficient way for enhancing oil recovery. However, foam flow is extremely complicated, and there are still unsolved problems for foam application. One is liquid injectivity. Our previous studies suggest that the injectivity in a SAG process is...
journal article 2020
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Lyu, X. (author), Voskov, D.V. (author), Rossen, W.R. (author)
Geological storage of CO2 is a crucial emerging technology to reduce anthropogenic greenhouse gas emissions. Due to the buoyant characteristic of injected gas and the complex geology of subsurface reservoirs, most injected CO2 either rapidly migrates to the top of the reservoir or fingers through high-permeability layers due to instability in...
conference paper 2020
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Hussain, A.A.A. (author), Vincent-Bonnieu, S.Y.F. (author), Kamarul Bahrim, R. Z. (author), Pilus, R. M. (author), Rossen, W.R. (author)
As foam is injected into an oil reservoir, the region near an injector can become oil-free due to the relatively high capillary number. Foam created in this region encounters oil further out in the reservoir. The impact of oil on foam in porous media is usually investigated by co-injecting surfactant, gas and oil, or by injecting pre...
journal article 2020
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Gong, J. (author), Vincent-Bonnieu, S.Y.F. (author), Kamarul Bahrim, Ridhwan Z. (author), Mamat, Che A.N.B. (author), Tewari, Raj D. (author), Mahamad Amir, Mohammad I. (author), Groenenboom, Jeroen (author), Farajzadeh, R. (author), Rossen, W.R. (author)
A surfactant alternating gas (SAG) process is often the injection method for foam, on the basis of its improved injectivity over direct foam injection. In a previous study, we reported coreflood experiments on liquid injectivity after foam flooding and liquid injectivity after injection of a gas slug following steady-state foam. Results...
journal article 2020
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Yu, G. (author), Rossen, W.R. (author), Vincent-Bonnieu, S.Y.F. (author)
The propagation of foam in an oil reservoir depends on the creation and stability of the foam in the reservoir, specifically the creation and stability of foam films, or lamellae. As the foam propagates far from the injection well, superficial velocity and pressure gradient decrease with distance from the well. Experimental (Friedmann et al....
journal article 2019
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Tang, J. (author), Smit, Michiel (author), Vincent-Bonnieu, S.Y.F. (author), Rossen, W.R. (author)
A new capillary number (N <sub>ca</sub> ) definition is proposed for 2-D etched micromodels. We derive the new definition from a force balance on a nonwetting ganglion trapped by capillarity. It incorporates the impact of pore microstructure on mobilization. The geometrical factors introduced can be estimated directly from image analysis of...
journal article 2019
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Alquaimi, B. (author), Rossen, W.R. (author)
Gas is used in petroleum reservoirs to displace oil for enhanced oil recovery. The microscopic displacement efficiency of gas is very good, but at the reservoir scale the process suffers from poor sweep efficiency, especially in naturally fractured reservoirs. Foam can improve the sweep. There have been considerable scientific contributions...
journal article 2019
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Hussain, A.A.A. (author), Vincent-Bonnieu, S.Y.F. (author), Kamarul Bahrim, R.Z. (author), Pilus, R.M. (author), Rossen, W.R. (author)
Foam can be applied to enhance oil recovery from a reservoir. Currently, to understand and model the behavior of foam in an oil reservoir, experiments need to be conducted in the presence of the specific crude oil, and extrapolating from one crude oil to another is not possible. It is therefore desirable to model the impact of a crude oil on...
journal article 2019
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Gong, J. (author), Vincent-Bonnieu, S.Y.F. (author), Kamarul Bahrim, R. Z. (author), Che Mamat, C. A.N.B. (author), Groenenboom, J. (author), Farajzadeh, R. (author), Rossen, W.R. (author)
Surfactant-alternating-gas (SAG) is a favored method of foam injection, in part because of excellent gas injectivity. However, liquid injectivity is usually very poor in SAG. We report a core-flood study of liquid injectivity under conditions like those near an injection well in SAG application in the field, i.e., after a prolonged period of gas...
journal article 2019
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Tang, J. (author), Vincent-Bonnieu, S.Y.F. (author), Rossen, W.R. (author)
We present a CT coreflood study of foam, both pre-generated and generated in-situ, displacing oil, as a function of oil type and saturation. Foam generation and propagation are reflected through sectional pressure measurements. Dual-energy CT imaging monitors in-time phase saturations. With an oil less harmful to foam (hexadecane), injection...
journal article 2019
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