Leakage from inclined porous reservoirs

Zimoch, Pawel; Neufeld, Jerome A.; Vella, Dominic

doi:10.1017/s0022112011000723

Cited by 5 publications

(3 citation statements)

References 14 publications

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“…This contrasts with leakage from a current within an inclined aquifer, where the depth of the current, and hence the pressure difference driving leakage, is limited by the along-slope component of gravity. Thus, the efficiency of storage is nonzero, E s (t → ∞) = constant, at long times (Zimoch et al 2011). These studies highlight the role of reservoir and leakage pathway properties along with the geometry of the reservoir.…”

Section: Containment and Leakage Of Comentioning

confidence: 81%

The Fluid Mechanics of Carbon Dioxide Sequestration

Huppert¹,

Neufeld

2014

Annu. Rev. Fluid Mech.

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325

220

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Humans are faced with a potentially disastrous global problem owing to the current emission of 32 gigatonnes of carbon dioxide (CO 2) annually into the atmosphere. A possible way to mitigate the effects is to store CO 2 in large porous reservoirs within the Earth. Fluid mechanics plays a key role in determining both the feasibility and risks involved in this geological sequestration. We review current research efforts looking at the propagation of CO 2 within the subsurface, the possible rates of leakage, the mechanisms that act to stably trap CO 2 , and the geomechanical response of the crust to large-scale CO 2 injection. We conclude with an outline for future research.

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Section: Containment and Leakage Of Comentioning

confidence: 81%

The Fluid Mechanics of Carbon Dioxide Sequestration

Huppert¹,

Neufeld

2014

Annu. Rev. Fluid Mech.

Self Cite

325

220

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“…For example, spatial correlation of the permeability ( k ) field as well as interconnectivity of high‐ k preferential flow pathways have a critical impact on CO 2 migration and trapping in saline aquifers [ Gershenzon et al ., ; Han et al ., ; Ide et al ., ; Lengler et al ., ; Tian et al ., ]. The modeling approach has also been followed, either numerically [ Buscheck et al ., ; Gasda et al ., ; Goater et al ., ; Yamamoto et al ., ] or analytically [ Gunn and Woods , ; Hesse et al ., ; MacMinn et al ., ; Zimoch et al ., ], to understand the behavior of a CO 2 plume in concomitance with regional groundwater flow and sloping caprock. Injection strategies aimed at enhancing the storage capacity and efficiency of saline formations have also been explored by means of numerical models [ Buscheck et al ., ; Cameron and Durlofsky , ; Shamshiri and Jafarpour , ; Cihan et al ., ; González‐Nicolás et al ., ; Huber et al ., ; Rasmusson et al ., ].…”

Section: Introductionmentioning

confidence: 99%

Imaging and quantification of spreading and trapping of carbon dioxide in saline aquifers using meter‐scale laboratory experiments

Trevisan

Pini

Cihan

et al. 2017

Water Resources Research

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The role of capillary forces during buoyant migration of CO2 is critical toward plume immobilization within the postinjection phase of a geological carbon sequestration operation. However, the inherent heterogeneity of the subsurface makes it very challenging to evaluate the effects of capillary forces on the storage capacity of these formations and to assess in situ plume evolution. To overcome the lack of accurate and continuous observations at the field scale and to mimic vertical migration and entrapment of realistic CO2 plumes in the presence of a background hydraulic gradient, we conducted two unique long‐term experiments in a 2.44 m × 0.5 m tank. X‐ray attenuation allowed measuring the evolution of a CO2‐surrogate fluid saturation, thus providing direct insight into capillarity‐dominated and buoyancy‐dominated flow processes occurring under successive drainage and imbibition conditions. The comparison of saturation distributions between two experimental campaigns suggests that layered‐type heterogeneity plays an important role on nonwetting phase (NWP) migration and trapping, because it leads to (i) longer displacement times (3.6 months versus 24 days) to reach stable trapping conditions, (ii) limited vertical migration of the plume (with center of mass at 39% versus 55% of aquifer thickness), and (iii) immobilization of a larger fraction of injected NWP mass (67.2% versus 51.5% of injected volume) as compared to the homogenous scenario. While these observations confirm once more the role of geological heterogeneity in controlling buoyant flows in the subsurface, they also highlight the importance of characterizing it at scales that are below seismic resolution (1–10 m).

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“…Also, various coating flows occur above porous substrates. Because the boundaries are porous, a variety of studies in recent years have analysed spreading gravity currents with leakage (Acton, Huppert & Worster 2001;Pritchard, Woods & Hogg 2001;Pritchard & Hogg 2002;Pritchard 2007;Neufeld, Vella & Huppert 2009;Spannuth et al 2009;Neufeld et al 2011;Vella et al 2011;Zemoch, Neufeld & Vella 2011;Zheng et al 2013). In this case, it is possible in some cases involving outward spreading to make a change of variables to arrive back at a PDE that again admits a similarity solution of the first kind (Pritchard et al 2001).…”

Section: Introductionmentioning

confidence: 99%

Converging gravity currents over a permeable substrate

2015

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We study the propagation of viscous gravity currents along a thin permeable substrate where slow vertical drainage is allowed from the boundary. In particular, we report the effect of this vertical fluid drainage on the second-kind self-similar solutions for the shape of the fluid-fluid interface in three contexts: (i) viscous axisymmetric gravity currents converging towards the centre of a cylindrical container; (ii) viscous gravity currents moving towards the origin in a horizontal Hele-Shaw channel with a power-law varying gap thickness in the horizontal direction; and (iii) viscous gravity currents propagating towards the origin of a porous medium with horizontal permeability and porosity gradients in power-law forms. For each of these cases with vertical leakage, we identify a regime diagram that characterizes whether the front reaches the origin or not; in particular, when the front does not reach the origin, we calculate the final location of the front. We have also conducted laboratory experiments with a cylindrical lock gate to generate a converging viscous gravity current where vertical fluid drainage is allowed from various perforated horizontal substrates. The time-dependent position of the propagating front is captured from the experiments, and the front position is found to agree well with the theoretical and numerical predictions when surface tension effects can be neglected.

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Leakage from inclined porous reservoirs

Cited by 5 publications

References 14 publications

The Fluid Mechanics of Carbon Dioxide Sequestration

The Fluid Mechanics of Carbon Dioxide Sequestration

Imaging and quantification of spreading and trapping of carbon dioxide in saline aquifers using meter‐scale laboratory experiments

Converging gravity currents over a permeable substrate

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