Journal ArticleDOI
Computational Modeling of the Geologic Sequestration of Carbon Dioxide
G. Schnaar,Dominic C. DiGiulio +1 more
TLDR
In this paper, the problem of subsurface injection of CO 2 is modeled as a multiphase flow, reactive transport, and geomechanical processes, and the authors demonstrate the use of modeling in project design, site characterization, assessments of leakage, and site monitoring.Abstract:
Geologic sequestration of CO 2 is a component of C capture and storage (CCS), an emerging technology for reducing CO 2 emissions to the atmosphere, and involves injection of captured CO 2 into deep subsurface formations. Similar to the injection of hazardous wastes, before injection of CO 2 , operators of geologic sequestration projects may need to demonstrate nonendangerment of groundwater resources during the lifetime of the project. Future requirements related to CO 2 accounting and transfer credits may require operators to evaluate and quantify any surface releases. Subsurface fluid flow computational models have been advocated as an integral tool in predicting and tracking the migration of CO 2 or mobilized constituents. Modeling the injection and sequestration of CO 2 poses unique challenges, such as the need to properly characterize CO 2 transport properties across a large range of temperatures and pressures, and the need to couple multiphase flow, reactive transport, and geomechanical processes. In addition, the volumes of CO 2 that may be injected are largely unprecedented, and an appropriate amount of site characterization across the potentially impacted area will be difficult. In the last several years, there have been several research studies specifically modeling the problem of subsurface injection of CO 2 . Existing studies demonstrate the use of modeling in project design, site characterization, assessments of leakage, and site monitoring. Particularly informative components of existing modeling studies include parameter sensitivity analyses, evaluation of numerical artifacts, code comparison, and demonstrations of model calibration to site monitoring data.read more
Citations
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Journal ArticleDOI
Geochemical impacts to groundwater from geologic carbon sequestration: controls on pH and inorganic carbon concentrations from reaction path and kinetic modeling.
TL;DR: Reaction path and kinetic models indicate that geochemical shifts caused by CO(2) leakage are closely linked to mineralogical properties of the receiving aquifer, and provide a frame of reference for developing indicative measurement, monitoring, and verification protocols for groundwater protection.
Journal ArticleDOI
Simulation of industrial-scale CO2 storage: Multi-scale heterogeneity and its impacts on storage capacity, injectivity and leakage
TL;DR: In this article, a transition probability-based Markov chain model is used to generate facies-based heterogeneous fields of reservoir and cap-rock porosity and permeability at the Rock Springs Uplift, Wyoming.
Journal ArticleDOI
Field-scale application of a semi-analytical model for estimation of CO2 and brine leakage along old wells
Michael A. Celia,Jan Martin Nordbotten,Jan Martin Nordbotten,Benjamin Court,Mark Dobossy,Stefan Bachu +5 more
TL;DR: In this article, the authors simulate 50 years of injection of supercritical CO 2 and use a Monte Carlo framework to analyze the overall system behavior and demonstrate the importance of residual brine saturations, the range of current options to quantify leaky well properties, and the impact of depth of injection and how it relates to leakage risk.
Journal ArticleDOI
Energetic and structural studies of amorphous Ca1−xMgxCO3·nH2O (0 ⩽ x ⩽ 1)
A. V. Radha,Alejandro Fernandez-Martinez,Yandi Hu,Young-Shin Jun,Glenn A. Waychunas,Alexandra Navrotsky +5 more
TL;DR: In this paper, the role of magnesium-containing amorphous precursors in carbonate mineralization was investigated using synchrotron X-ray scattering experiments with pair distribution function (PDF) analysis.
Journal ArticleDOI
The impact of heterogeneity on the distribution of CO2: Numerical simulation of CO2 storage at Ketzin
TL;DR: In this article, the impact of unknown spatial variability in the petrophysical properties within a sandy channel facies of a fluviatile storage formation using stochastic methods in a Monte Carlo approach was investigated.
References
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Journal ArticleDOI
TOUGHREACT-A simulation program for non-isothermal multiphase reactive geochemical transport in variably saturated geologic media: Applications to geothermal injectivity and CO2 geological sequestration
TL;DR: This work examines ways in which the chemical composition of reinjected waters can be modified to improve reservoir performance by maintaining or even enhancing injectivity, and uses recent European studies as a starting point to explore chemically induced effects of fluid circulation in the geothermal systems.
Journal ArticleDOI
Impact of relative permeability hysteresis on geological CO2 storage
TL;DR: In this article, the importance of accounting for CO2 trapping in the relative permeability model for predicting the distribution and mobility of CO2 in the formation has been evaluated, and it is shown that the mechanism of capillary trapping can be exploited to improve the overall effectiveness of the injection project.
Journal ArticleDOI
Numerical simulation of CO2 disposal by mineral trapping in deep aquifers
TL;DR: In this article, the authors analyzed the impact of CO2 immobilization through carbonate mineral precipitation in aquifers, and found that the amount of CO 2 that may be sequestered by precipitation of secondary carbonates is comparable with and can be larger than the effect of dissolution in pore waters.
Journal ArticleDOI
Injection and Storage of CO2 in Deep Saline Aquifers: Analytical Solution for CO2 Plume Evolution During Injection
TL;DR: In this paper, an analytical solution is derived to describe the space-time evolution of the CO2 plume, using arguments of energy minimization, and reduces to a simple radial form of the Buckley-Leverett solution for conditions of viscous domination.
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