Dissolution Trapping of Carbon Dioxide in Reservoir Formation Brine – A Carbon Storage Mechanism

Iglauer, Stefan

doi:10.5772/20206

Cited by 109 publications

(90 citation statements)

References 72 publications

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“…(Herbert et al 1988;Huyakorn et al 1987;Oostrom et al 1992;Simmons et al 2001; Van et al 2009). Recently, mass transport in Rayleigh-Bénard convection has been investigated extensively for CCS applications Gilfillan et al 2009;Huppert and Neufeld 2014;Iglauer 2011;Lindeberg and Wessel-Berg 1997;Riaz and Cinar 2014) because shifting from physical trapping by caprocks to dissolution trapping improves the security of storage against buoyancy.…”

Section: Introductionmentioning

confidence: 99%

Effect of diffusing layer thickness on the density-driven natural convection of miscible fluids in porous media: Modeling of mass transport

Wang¹,

Nakanishi²,

Teston³

et al. 2018

JFST

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In this study, density-driven natural convection in porous media associated with Rayleigh-Taylor instability was visualized by X-ray computed tomography to investigate the effect of the thickness of the diffusing interface on convection. The thickness of the interface was changed by molecular diffusion with time, and the effective diffusivity in a porous medium was estimated. Compared with the thick interface, for the thin interface, many fine fingers formed and extended rapidly in a vertical direction. The onset time of natural convection increased proportionally with the thickness of the interface, being correlated with Rayleigh number and Péclet number. For the thinner initial interface, the finger number density increased more rapidly after onset and reached a higher value. Next, we discussed the mass transport in Rayleigh-Taylor convection to show how dispersion affects mass transport based on finger extension velocity and concentration in fingers. Increasing the interface thickness delayed the onset of convection, while the finger extension velocity remained the same. The reduced finger extension velocity changed nonlinearly with the Péclet number, reflecting the effect of dispersion. High transverse dispersion and longitudinal dispersion quickly reduced finger density. Transverse dispersion between ascending and descending fingers decreased the density; the density decreased linearly along the finger on both sides of the symmetric plane. As a result, the Sherwood number was proportional to the Rayleigh number, whereas the coefficient changed nonlinearly with Péclet number because of dispersion, reflecting the nonlinear dependences of the reduced velocity and the reduced density difference on Péclet number.

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Section: Introductionmentioning

confidence: 99%

Effect of diffusing layer thickness on the density-driven natural convection of miscible fluids in porous media: Modeling of mass transport

Wang¹,

Nakanishi²,

Teston³

et al. 2018

JFST

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“…1 When CO 2 is injected into deep saline aquifers, it exists in a supercritical state and displaces the formation fluid from the pore space in a variety of possible saturation patterns, depending on the relative strength of capillary and viscous forces, as well as large and small scale geological heterogeneities. [2][3][4] Fingering and displacement patterns at the pore scale strongly influence the CO 2 storage process within the a) Author to whom correspondence should be addressed. Electronic mail: haihu.liu@mail.xjtu.edu.cn reservoir in terms of storage capacity, security, and ultimate fate of the injected CO 2 .…”

Section: Introductionmentioning

confidence: 99%

Lattice Boltzmann simulation of immiscible fluid displacement in porous media: Homogeneous versus heterogeneous pore network

2015

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Injection of anthropogenic carbon dioxide (CO 2 ) into geological formations is a promising approach to reduce greenhouse gas emissions into the atmosphere. Predicting the amount of CO 2 that can be captured and its long-term storage stability in subsurface requires a fundamental understanding of multiphase displacement phenomena at the pore scale. In this paper, the lattice Boltzmann method is employed to simulate the immiscible displacement of a wetting fluid by a non-wetting one in two microfluidic flow cells, one with a homogeneous pore network and the other with a randomly heterogeneous pore network. We have identified three different displacement patterns, namely, stable displacement, capillary fingering, and viscous fingering, all of which are strongly dependent upon the capillary number (Ca), viscosity ratio (M), and the media heterogeneity. The non-wetting fluid saturation (S nw ) is found to increase nearly linearly with log Ca for each constant M. Increasing M (viscosity ratio of non-wetting fluid to wetting fluid) or decreasing the media heterogeneity can enhance the stability of the displacement process, resulting in an increase in S nw . In either pore networks, the specific interfacial length is linearly proportional to S nw during drainage with equal proportionality constant for all cases excluding those revealing considerable viscous fingering. Our numerical results confirm the previous experimental finding that the steady state specific interfacial length exhibits a linear dependence on S nw for either favorable (M ≥ 1) or unfavorable (M < 1) displacement, and the slope is slightly higher for the unfavorable displacement. C 2015 Author(s). All article content, except where otherwise noted, is licensed under a Creative Commons Attribution 3.0 Unported License. [http://dx

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“…二酸化炭素気泡には界面張力に伴うトラップが働き，多孔質内部にトラップされる Suekane et al, 2008)．さらに，二酸化炭素は徐々に地下水へと溶解する (Gilfillan et al, 2009;Iglauer, 2011;Lindeberg and Wessel-Berg, 1997;Lindeberg and Bergmo, 2003;Riaz and Cinar, 2014 Ghesmat et al, 2010;Hewitt et al, 2014;Hidalgo and Carrera, 2009;Pau et al, 2010;Xie et al, 2011)や実験 (Backhaus et al, 2011;Huppert et al, 1986;Neufeld et al, 2010) Fig. 2 Evolution of three-dimensional finger structure associated with the Rayleigh-Taylor convection in a porous medium with the layered structure.…”

Section: る不透過層による物理トラップ（物理的遮蔽）が働くが，検知が困難である断層などよる漏えいリスクは依然として存在する．次にunclassified

Effect of layered heterogeneity of a porous medium on density-driven natural convection

Nakanishi

Hyodo

Wang

et al. 2017

Transactions of the JSME (In Japanese)

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In carbon dioxide capture and storage (CCS), the shift to the dissolution trapping of CO 2 in brine from the capillary trapping and physical trapping by caprock depends on the mass transfer associated with density-driven natural convection at a reservoir scale. In this study, natural convection between miscible fluids in a porous medium with layered structure is visualized three-dimensionally by means of an X-ray microtomography. When a finger associated with Rayleigh-Taylor convection passes through the interface of the layered heterogeneous structure with an increasing permeability, because of an increase in the finger extension velocity, the finger diameter and the concentration in the finger decrease. On the other hand, when a finger passes through the interface with a decreasing permeability, the finger diameter increases and the concentration in the finger remains the same, which suggests that the change in the concentration in the finger shows nonlinearity against the permeability. In present study, because the thickness of the initial interface is lower than the thickness of the layer structure, the onset time of convection depends on the property of the porous medium just around the initial interface. In addition to that, the finger extension velocity depends on the local property of the porous medium and the empirical equation derived for the uniform porous medium agrees well with the local finger extension velocity estimated for each layer.

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Dissolution Trapping of Carbon Dioxide in Reservoir Formation Brine – A Carbon Storage Mechanism

Cited by 109 publications

References 72 publications

Effect of diffusing layer thickness on the density-driven natural convection of miscible fluids in porous media: Modeling of mass transport

Effect of diffusing layer thickness on the density-driven natural convection of miscible fluids in porous media: Modeling of mass transport

Lattice Boltzmann simulation of immiscible fluid displacement in porous media: Homogeneous versus heterogeneous pore network

Effect of layered heterogeneity of a porous medium on density-driven natural convection

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