Effect of Geologic Parameters on CO2 Storage in Deep Saline Aquifers

Mo, Sjur; Zweigel, Peter; Lindeberg, Erik; Akervoll, Idar

doi:10.2523/93952-ms

Cited by 9 publications

(10 citation statements)

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“…The reservoir outer boundary cells were extended by multiplying their volume by 10 8 to simulate constant pressure boundary conditions (i.e. Dirichlet boundary conditions) . Porosity and permeability heterogeneity of the 10th SPE comparative solution project were used for each grid block to simulate a representative highly heterogeneous reservoir (Fig.…”

Section: Methodsmentioning

confidence: 99%

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Impact of salinity on CO₂containment security in highly heterogeneous reservoirs

et al. 2017

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It is well established that brine salinity can vary substantially in prospective CO2 geo‐storage reservoirs. However, the impact of salinity on containment security has received only little attention. We thus used a compositional reservoir simulation to evaluate the effect of salinity on CO2 plume migration and CO2 trapping capacities in a 3D heterogeneous reservoir. The used heterogeneous reservoir consists of two formations: the bottom part of the reservoir is a fluvial reservoir, and the top part represents a near‐shore environment. Our results clearly indicate that salinity has a significant influence on CO2 migration and the relative amount of mobile, residual, and dissolved CO2. Lower salinity decreases CO2 mobility and migration distance, and enhances residual and solubility trapping significantly. We thus conclude that brine salinity is an important impact factor in the context of CO2 geo‐storage, and that less saline reservoirs are preferable CO2 sinks due to increased storage capacity and containment security. © 2017 Society of Chemical Industry and John Wiley & Sons, Ltd.

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Section: Methodsmentioning

confidence: 99%

“…Dirichlet boundary conditions). 68,69 Porosity and permeability heterogeneity of the 10th SPE comparative solution project 70 were used for each grid block to simulate a representative highly heterogeneous reservoir ( Fig. 1).…”

Section: Model Description and Initializationmentioning

confidence: 99%

Impact of salinity on CO₂containment security in highly heterogeneous reservoirs

et al. 2017

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“…Here, we obtained a value of S gr max (0.35) by using an empirical formulation proposed by Holtz [2002] and assigned equally throughout the entire scenarios. Previous researchers estimated residual CO 2 trapping mechanism using a similar approach [ Kumar et al , 2005; Mo et al , 2005; Juanes et al , 2006; Doughty , 2007; Ide et al , 2007; Flett et al , 2007]. Figure 2 also includes the capillary pressure curve applied in this work.…”

Section: Modeling Approachmentioning

confidence: 99%

Effects of permeability on CO₂ trapping mechanisms and buoyancy‐driven CO₂ migration in saline formations

Han

Lee

et al. 2010

Water Resources Research

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[1] We present the results from a series of numerical simulations to explore systematic k heterogeneity effects on both CO 2 trapping mechanisms and buoyancy-driven CO 2 migration. For this purpose, we generated various permutations of two-dimensional numerical models of subsurface porous media: homogeneous, random, homogenous with a low-permeability (k) lens, and isotropically/anisotropically correlated k fields. For heterogeneous cases, we used a sequential Gaussian simulation technique to generate ten realizations in each model permutation. In each simulation, the amounts of mobile, residually, and aqueously trapped CO 2 were calculated, and the spatial distributions of the CO 2 plumes were quantified using first and second spatial moments. Simulation results from both homogeneous and random k fields suggest that the amount of residually trapped CO 2 increases as the mean effective k increases. These results imply that the overall velocity distribution, which governs the sweeping area of the supercritical-phase CO 2 plume, is a critical factor for controlling residual CO 2 trapping. However, as overall velocity (or effective k field) increases, we predict that the CO 2 plume potentially reaches the caprock more quickly. In addition, results also show that the decrease of variance in ln k increases the amount of residually trapped CO 2 . In simulations of anisotropically correlated k fields, the vertical CO 2 migration distance due to buoyancy shortens as the horizontal correlation length becomes greater. In addition, as the horizontal correlation length becomes greater, residual CO 2 trapping increases and mobile CO 2 decreases because the CO 2 plume spreads farther laterally (i.e., it sweeps a larger area). In summary, results of these analyses suggest that heterogeneous k fields with greater anisotropic correlation ratios potentially maximize residual CO 2 trapping and minimize buoyancy-driven CO 2 migration. Our findings also suggest that when heterogeneous k fields have a certain structure such as a low-k lens or other hydraulic barriers (e.g., faults), the amount of residually trapped CO 2 may increase and depend more on the geometry of geological structures than the magnitude of effective k.

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“…12 Trapping of CO 2 inside the geological formation as a residual gas occurs when the formation water invades or comes in contact with the CO 2 plume. 10 Four kinds of trapping mechanisms occur inside the reservoir but they do not occur at the same time. All these mechanisms are briefly explained below.…”

Section: Trapping Mechanisms In Geological Sequestrationmentioning

confidence: 99%

“…Geological sequestration is found out to be best storage site with huge storage potential and with less risk of environmental contamination. According to Mo et al 10 Oil and Gas formations: In the above three storage sites, we know the characteristics of the oil reservoir more. We assume that the volume of CO 2 which can be stored in these sites is equal to or slightly less than the volume of the oil extracted.…”

Section: B Estimation Of Formation Site's Storage Capacitymentioning

confidence: 99%

Investigation of latest techniques in carbon sequestration with emphasis on geological sequestration and its effects

Anmala¹,

Boindala²

2019

MOJES

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In the pursuit of development, man has polluted and exploited many resources provided by mother nature. In these pollutions, CO2 pollution has become the most concerning contemporary and sought after problem in the current scenario. Observations indicate that the Carbon concentration levels have exceeded beyond the threshold limits. Among the solutions available currently, Carbon-Capture and Storage (CCS) or Carbon Sequestration (CS) is the best solution considering the cost and efficiency of carbon removal from the atmosphere. In the available Carbon sequestration methods, a geological sequestration is a viable option for long-term sustainable storage of CO2. This article focusses on latest technologies developed with respect to Geological Sequestration and also on the carbon capture techniques, site selection for Geological sequestration, transport as well as uncertainties and difficulties in the modeling of the involved process. The main objective is to stress the need for these techniques and motivate fellow researchers in this essential and emerging field.

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Effect of Geologic Parameters on CO2 Storage in Deep Saline Aquifers

Cited by 9 publications

References 0 publications

Impact of salinity on CO₂containment security in highly heterogeneous reservoirs

Impact of salinity on CO₂containment security in highly heterogeneous reservoirs

Effects of permeability on CO₂ trapping mechanisms and buoyancy‐driven CO₂ migration in saline formations

Investigation of latest techniques in carbon sequestration with emphasis on geological sequestration and its effects

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Effect of Geologic Parameters on CO2 Storage in Deep Saline Aquifers

Cited by 9 publications

References 0 publications

Impact of salinity on CO2containment security in highly heterogeneous reservoirs

Impact of salinity on CO2containment security in highly heterogeneous reservoirs

Effects of permeability on CO2 trapping mechanisms and buoyancy‐driven CO2 migration in saline formations

Investigation of latest techniques in carbon sequestration with emphasis on geological sequestration and its effects

Contact Info

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Impact of salinity on CO₂containment security in highly heterogeneous reservoirs

Impact of salinity on CO₂containment security in highly heterogeneous reservoirs

Effects of permeability on CO₂ trapping mechanisms and buoyancy‐driven CO₂ migration in saline formations