Predicting long-term geochemical alteration of wellbore cement in a generic geological CO2 confinement site: Tackling a difficult reactive transport modeling challenge

Gherardi, Fabrizio; Audigane, Pascal; Gaucher, Éric C.

doi:10.1016/j.jhydrol.2011.12.026

Cited by 73 publications

(66 citation statements)

References 139 publications

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“…Furthermore this benchmark was proposed by an advanced reactive transport modelling team and not by code developers. Our main purpose thus was to increase confidence in the safety analysis based on numerical modelling in the case of nuclear waste management, but also for the safety of CO 2 storage where cementitious boreholes and clay caprock interact [33]. Safety analysis usually requires a long time scale (e.g., up to 100,000 years for nuclear waste disposal); however, our goal was not to perform a safety analysis, but rather to compare codes, for which reason we selected a 10,000-year simulation time.…”

Section: Introductionmentioning

confidence: 99%

Benchmarks for multicomponent reactive transport across a cement/clay interface

Marty¹,

Bildstein

Blanc³

et al. 2015

Comput Geosci

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International audienceThe use of the subsurface for CO2 storage, geothermal energy generation, and nuclear waste disposal will greatly increase the interaction between clay(stone) and concrete. The development of models describing the mineralogical transformations at this interface is complicated, because contrasting geochemical conditions (Eh, pH, solution composition, etc.) induce steep concentration gradients and a high mineral reactivity. Due to the complexity of the problem, analytical solutions are not available to verify code accuracy, rendering code intercomparisons as the most efficient method for assessing code capabilities and for building confidence in the used model. A benchmark problem was established for tackling this issue. We summarize three scenarios with increasing geochemical complexity in this paper. The processes considered in the simulations are diffusion-controlled transport in saturated media under isothermal conditions, cation exchange reactions, and both local equilibrium and kinetically controlled mineral dissolution-precipitation reactions. No update of the pore diffusion coefficient as a function of porosity changes was considered. Seven international teams participated in this benchmarking exercise. The reactive transport codes used (TOUGHREACT, PHREEQC, with two different ways of handling transport, CRUNCH, HYTEC, ORCHESTRA, MIN3P-THCm) gave very similar patterns in terms of predicted solute concentrations and mineral distributions. Some differences linked to the considered activity models were observed, but they do not bias the general system evolution. The benchmarking exercise thus demonstrates that a reactive transport modelling specification for long-term performance assessment can be consistently addressed by multiple simulators

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Section: Introductionmentioning

confidence: 99%

Benchmarks for multicomponent reactive transport across a cement/clay interface

Marty¹,

Bildstein

Blanc³

et al. 2015

Comput Geosci

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“…Although ground monitoring technologies provide great insight into the magnitudes and patterns of ground displacements and flow behavior, it is important to develop advanced modeling methods as the time-scale for evaluation of storage safety is usually in terms of hundreds to thousands of years. Several modeling studies were carried out by various researchers with different numerical simulators to incorporate geochemical processes associated with CO 2 injection and post-injection time periods (Audigane et al, 2007;Fan et al, 2012;Gherardi et al, 2012;Klein et al, 2013;Nghiem et al, 2004;Ofori and Engler, 2011;Thibeau et al, 2007;Saaltink et al, 2013). Analytical and semi-analytical solutions were derived to model CO 2 injection into saline aquifers (Houseworth, 2012;Juanes and MacMinn, 2008;Nordbotten and Celia, 2006;Szulczewski et al, 2012).…”

Section: Introductionmentioning

confidence: 99%

Influence of geochemical processes on the geomechanical response of the overburden due to CO2 storage in saline aquifers

Varre

Siriwardane

Gondle

et al. 2015

International Journal of Greenhouse Gas Control

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a b s t r a c tThe objective of the study is to investigate the influence of geochemical processes on the geomechanical response of overburden during and after CO 2 injection. In the current study, coupled multiphase fluid flow and geomechanical modeling with geochemical processes were performed to simulate large-scale injection of CO 2 (up to 10 million metric tonnes per year) into a deep saline aquifer over the long-term (up to 1000 years). The geochemical modeling results show that geochemical processes, such as mineral dissolution and precipitation, do not have a significant influence on reservoir rock porosity (about 2% reduction). Modeling results show that the inclusion of geochemical reactions in the coupled fluid flow and geomechanical models do not have any significant influence on the computed pressure and ground displacements due to CO 2 injection for the typical mineralogical composition considered in this study. In other words, a coupled single-phase fluid flow and geomechanical model would give similar results at a significantly lower computational effort.

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“…This effect was illustrated by laboratory experiments ( [11]- [15]), field observations [16] and both decimetre-and field-scale reactive transport numerical simulations ( [17], [18]). Moreover, in a recent study [19], a quantitative mechanical post-characterization of Portland cement based samples submitted to carbonation under deep downhole conditions (90°C and 28 MPa) was performed.…”

Section: Introductionmentioning

confidence: 90%

“…Using the combination of porosities definitions (1)- (4), the continuity equations (13), and the in-pore fluid density evolution (17), (18), the mass conservation equation (27) becomes:…”

Section: Conclusion On the Influence Of Chemical Reactions On Poro-mementioning

confidence: 99%

A chemo-poromechanical model of oilwell cement carbonation under CO2 geological storage conditions

Fabbri

Jacquemet

Seyedi

2012

Cement and Concrete Research

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Predicting long-term geochemical alteration of wellbore cement in a generic geological CO2 confinement site: Tackling a difficult reactive transport modeling challenge

Abstract: . Predicting long-term geochemical alteration of wellbore cement in a generic geological CO2 confinement site: tackling a difficult reactive transport modeling challenge. Journal of Hydrology, Elsevier, 2012, 420-421, pp.340-359.

Cited by 73 publications

References 139 publications

Benchmarks for multicomponent reactive transport across a cement/clay interface

Benchmarks for multicomponent reactive transport across a cement/clay interface

Influence of geochemical processes on the geomechanical response of the overburden due to CO2 storage in saline aquifers

A chemo-poromechanical model of oilwell cement carbonation under CO2 geological storage conditions

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